/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ /* ==================================================================== * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. All advertising materials mentioning features or use of this * software must display the following acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" * * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to * endorse or promote products derived from this software without * prior written permission. For written permission, please contact * openssl-core@openssl.org. * * 5. Products derived from this software may not be called "OpenSSL" * nor may "OpenSSL" appear in their names without prior written * permission of the OpenSSL Project. * * 6. Redistributions of any form whatsoever must retain the following * acknowledgment: * "This product includes software developed by the OpenSSL Project * for use in the OpenSSL Toolkit (http://www.openssl.org/)" * * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED * OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * This product includes cryptographic software written by Eric Young * (eay@cryptsoft.com). This product includes software written by Tim * Hudson (tjh@cryptsoft.com). * */ /* ==================================================================== * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. * ECC cipher suite support in OpenSSL originally developed by * SUN MICROSYSTEMS, INC., and contributed to the OpenSSL project. */ /* ==================================================================== * Copyright 2005 Nokia. All rights reserved. * * The portions of the attached software ("Contribution") is developed by * Nokia Corporation and is licensed pursuant to the OpenSSL open source * license. * * The Contribution, originally written by Mika Kousa and Pasi Eronen of * Nokia Corporation, consists of the "PSK" (Pre-Shared Key) ciphersuites * support (see RFC 4279) to OpenSSL. * * No patent licenses or other rights except those expressly stated in * the OpenSSL open source license shall be deemed granted or received * expressly, by implication, estoppel, or otherwise. * * No assurances are provided by Nokia that the Contribution does not * infringe the patent or other intellectual property rights of any third * party or that the license provides you with all the necessary rights * to make use of the Contribution. * * THE SOFTWARE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. IN * ADDITION TO THE DISCLAIMERS INCLUDED IN THE LICENSE, NOKIA * SPECIFICALLY DISCLAIMS ANY LIABILITY FOR CLAIMS BROUGHT BY YOU OR ANY * OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS OR * OTHERWISE. */ #include #include #include #include #include #include #include #include #include #include #include "ssl_locl.h" /* Some error codes are special. Ensure the make_errors.go script never * regresses this. */ OPENSSL_COMPILE_ASSERT(SSL_R_TLSV1_ALERT_NO_RENEGOTIATION == SSL_AD_NO_RENEGOTIATION + SSL_AD_REASON_OFFSET, ssl_alert_reason_code_mismatch); int SSL_clear(SSL *s) { if (s->method == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_clear, SSL_R_NO_METHOD_SPECIFIED); return 0; } if (ssl_clear_bad_session(s)) { SSL_SESSION_free(s->session); s->session = NULL; } s->hit = 0; s->shutdown = 0; if (s->renegotiate) { OPENSSL_PUT_ERROR(SSL, SSL_clear, ERR_R_INTERNAL_ERROR); return 0; } /* SSL_clear may be called before or after the |s| is initialized in either * accept or connect state. In the latter case, SSL_clear should preserve the * half and reset |s->state| accordingly. */ if (s->handshake_func != NULL) { if (s->server) { SSL_set_accept_state(s); } else { SSL_set_connect_state(s); } } else { assert(s->state == 0); } /* TODO(davidben): Some state on |s| is reset both in |SSL_new| and * |SSL_clear| because it is per-connection state rather than configuration * state. Per-connection state should be on |s->s3| and |s->d1| so it is * naturally reset at the right points between |SSL_new|, |SSL_clear|, and * |ssl3_new|. */ s->rwstate = SSL_NOTHING; s->rstate = SSL_ST_READ_HEADER; if (s->init_buf != NULL) { BUF_MEM_free(s->init_buf); s->init_buf = NULL; } s->packet = NULL; s->packet_length = 0; ssl_clear_cipher_ctx(s); if (s->next_proto_negotiated) { OPENSSL_free(s->next_proto_negotiated); s->next_proto_negotiated = NULL; s->next_proto_negotiated_len = 0; } /* The s->d1->mtu is simultaneously configuration (preserved across * clear) and connection-specific state (gets reset). * * TODO(davidben): Avoid this. */ unsigned mtu = 0; if (s->d1 != NULL) { mtu = s->d1->mtu; } s->method->ssl_free(s); if (!s->method->ssl_new(s)) { return 0; } s->enc_method = ssl3_get_enc_method(s->version); assert(s->enc_method != NULL); if (SSL_IS_DTLS(s) && (SSL_get_options(s) & SSL_OP_NO_QUERY_MTU)) { s->d1->mtu = mtu; } s->client_version = s->version; return 1; } SSL *SSL_new(SSL_CTX *ctx) { SSL *s; if (ctx == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_new, SSL_R_NULL_SSL_CTX); return NULL; } if (ctx->method == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_new, SSL_R_SSL_CTX_HAS_NO_DEFAULT_SSL_VERSION); return NULL; } s = (SSL *)OPENSSL_malloc(sizeof(SSL)); if (s == NULL) { goto err; } memset(s, 0, sizeof(SSL)); s->min_version = ctx->min_version; s->max_version = ctx->max_version; s->options = ctx->options; s->mode = ctx->mode; s->max_cert_list = ctx->max_cert_list; s->cert = ssl_cert_dup(ctx->cert); if (s->cert == NULL) { goto err; } s->read_ahead = ctx->read_ahead; s->msg_callback = ctx->msg_callback; s->msg_callback_arg = ctx->msg_callback_arg; s->verify_mode = ctx->verify_mode; s->sid_ctx_length = ctx->sid_ctx_length; assert(s->sid_ctx_length <= sizeof s->sid_ctx); memcpy(&s->sid_ctx, &ctx->sid_ctx, sizeof(s->sid_ctx)); s->verify_callback = ctx->default_verify_callback; s->generate_session_id = ctx->generate_session_id; s->param = X509_VERIFY_PARAM_new(); if (!s->param) { goto err; } X509_VERIFY_PARAM_inherit(s->param, ctx->param); s->quiet_shutdown = ctx->quiet_shutdown; s->max_send_fragment = ctx->max_send_fragment; CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); s->ctx = ctx; s->tlsext_debug_cb = 0; s->tlsext_debug_arg = NULL; s->tlsext_ticket_expected = 0; CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); s->initial_ctx = ctx; if (ctx->tlsext_ecpointformatlist) { s->tlsext_ecpointformatlist = BUF_memdup( ctx->tlsext_ecpointformatlist, ctx->tlsext_ecpointformatlist_length); if (!s->tlsext_ecpointformatlist) { goto err; } s->tlsext_ecpointformatlist_length = ctx->tlsext_ecpointformatlist_length; } if (ctx->tlsext_ellipticcurvelist) { s->tlsext_ellipticcurvelist = BUF_memdup(ctx->tlsext_ellipticcurvelist, ctx->tlsext_ellipticcurvelist_length * 2); if (!s->tlsext_ellipticcurvelist) { goto err; } s->tlsext_ellipticcurvelist_length = ctx->tlsext_ellipticcurvelist_length; } s->next_proto_negotiated = NULL; if (s->ctx->alpn_client_proto_list) { s->alpn_client_proto_list = BUF_memdup(s->ctx->alpn_client_proto_list, s->ctx->alpn_client_proto_list_len); if (s->alpn_client_proto_list == NULL) { goto err; } s->alpn_client_proto_list_len = s->ctx->alpn_client_proto_list_len; } s->verify_result = X509_V_OK; s->method = ctx->method; if (!s->method->ssl_new(s)) { goto err; } s->enc_method = ssl3_get_enc_method(s->version); assert(s->enc_method != NULL); s->rwstate = SSL_NOTHING; s->rstate = SSL_ST_READ_HEADER; CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); s->psk_identity_hint = NULL; if (ctx->psk_identity_hint) { s->psk_identity_hint = BUF_strdup(ctx->psk_identity_hint); if (s->psk_identity_hint == NULL) { goto err; } } s->psk_client_callback = ctx->psk_client_callback; s->psk_server_callback = ctx->psk_server_callback; s->tlsext_channel_id_enabled = ctx->tlsext_channel_id_enabled; if (ctx->tlsext_channel_id_private) { s->tlsext_channel_id_private = EVP_PKEY_dup(ctx->tlsext_channel_id_private); } s->signed_cert_timestamps_enabled = s->ctx->signed_cert_timestamps_enabled; s->ocsp_stapling_enabled = s->ctx->ocsp_stapling_enabled; return s; err: if (s != NULL) { SSL_free(s); } OPENSSL_PUT_ERROR(SSL, SSL_new, ERR_R_MALLOC_FAILURE); return NULL; } int SSL_CTX_set_session_id_context(SSL_CTX *ctx, const uint8_t *sid_ctx, unsigned int sid_ctx_len) { if (sid_ctx_len > sizeof ctx->sid_ctx) { OPENSSL_PUT_ERROR(SSL, SSL_CTX_set_session_id_context, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); return 0; } ctx->sid_ctx_length = sid_ctx_len; memcpy(ctx->sid_ctx, sid_ctx, sid_ctx_len); return 1; } int SSL_set_session_id_context(SSL *ssl, const uint8_t *sid_ctx, unsigned int sid_ctx_len) { if (sid_ctx_len > SSL_MAX_SID_CTX_LENGTH) { OPENSSL_PUT_ERROR(SSL, SSL_set_session_id_context, SSL_R_SSL_SESSION_ID_CONTEXT_TOO_LONG); return 0; } ssl->sid_ctx_length = sid_ctx_len; memcpy(ssl->sid_ctx, sid_ctx, sid_ctx_len); return 1; } int SSL_CTX_set_generate_session_id(SSL_CTX *ctx, GEN_SESSION_CB cb) { CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); ctx->generate_session_id = cb; CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); return 1; } int SSL_set_generate_session_id(SSL *ssl, GEN_SESSION_CB cb) { ssl->generate_session_id = cb; return 1; } int SSL_has_matching_session_id(const SSL *ssl, const uint8_t *id, unsigned int id_len) { /* A quick examination of SSL_SESSION_hash and SSL_SESSION_cmp shows how we * can "construct" a session to give us the desired check - ie. to find if * there's a session in the hash table that would conflict with any new * session built out of this id/id_len and the ssl_version in use by this * SSL. */ SSL_SESSION r, *p; if (id_len > sizeof r.session_id) { return 0; } r.ssl_version = ssl->version; r.session_id_length = id_len; memcpy(r.session_id, id, id_len); CRYPTO_r_lock(CRYPTO_LOCK_SSL_CTX); p = lh_SSL_SESSION_retrieve(ssl->ctx->sessions, &r); CRYPTO_r_unlock(CRYPTO_LOCK_SSL_CTX); return p != NULL; } int SSL_CTX_set_purpose(SSL_CTX *s, int purpose) { return X509_VERIFY_PARAM_set_purpose(s->param, purpose); } int SSL_set_purpose(SSL *s, int purpose) { return X509_VERIFY_PARAM_set_purpose(s->param, purpose); } int SSL_CTX_set_trust(SSL_CTX *s, int trust) { return X509_VERIFY_PARAM_set_trust(s->param, trust); } int SSL_set_trust(SSL *s, int trust) { return X509_VERIFY_PARAM_set_trust(s->param, trust); } int SSL_CTX_set1_param(SSL_CTX *ctx, X509_VERIFY_PARAM *vpm) { return X509_VERIFY_PARAM_set1(ctx->param, vpm); } int SSL_set1_param(SSL *ssl, X509_VERIFY_PARAM *vpm) { return X509_VERIFY_PARAM_set1(ssl->param, vpm); } void ssl_cipher_preference_list_free( struct ssl_cipher_preference_list_st *cipher_list) { sk_SSL_CIPHER_free(cipher_list->ciphers); OPENSSL_free(cipher_list->in_group_flags); OPENSSL_free(cipher_list); } struct ssl_cipher_preference_list_st *ssl_cipher_preference_list_dup( struct ssl_cipher_preference_list_st *cipher_list) { struct ssl_cipher_preference_list_st *ret = NULL; size_t n = sk_SSL_CIPHER_num(cipher_list->ciphers); ret = OPENSSL_malloc(sizeof(struct ssl_cipher_preference_list_st)); if (!ret) { goto err; } ret->ciphers = NULL; ret->in_group_flags = NULL; ret->ciphers = sk_SSL_CIPHER_dup(cipher_list->ciphers); if (!ret->ciphers) { goto err; } ret->in_group_flags = BUF_memdup(cipher_list->in_group_flags, n); if (!ret->in_group_flags) { goto err; } return ret; err: if (ret && ret->ciphers) { sk_SSL_CIPHER_free(ret->ciphers); } if (ret) { OPENSSL_free(ret); } return NULL; } struct ssl_cipher_preference_list_st *ssl_cipher_preference_list_from_ciphers( STACK_OF(SSL_CIPHER) * ciphers) { struct ssl_cipher_preference_list_st *ret = NULL; size_t n = sk_SSL_CIPHER_num(ciphers); ret = OPENSSL_malloc(sizeof(struct ssl_cipher_preference_list_st)); if (!ret) { goto err; } ret->ciphers = NULL; ret->in_group_flags = NULL; ret->ciphers = sk_SSL_CIPHER_dup(ciphers); if (!ret->ciphers) { goto err; } ret->in_group_flags = OPENSSL_malloc(n); if (!ret->in_group_flags) { goto err; } memset(ret->in_group_flags, 0, n); return ret; err: if (ret && ret->ciphers) { sk_SSL_CIPHER_free(ret->ciphers); } if (ret) { OPENSSL_free(ret); } return NULL; } X509_VERIFY_PARAM *SSL_CTX_get0_param(SSL_CTX *ctx) { return ctx->param; } X509_VERIFY_PARAM *SSL_get0_param(SSL *ssl) { return ssl->param; } void SSL_certs_clear(SSL *s) { ssl_cert_clear_certs(s->cert); } void SSL_free(SSL *s) { if (s == NULL) { return; } if (s->param) { X509_VERIFY_PARAM_free(s->param); } CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL, s, &s->ex_data); if (s->bbio != NULL) { /* If the buffering BIO is in place, pop it off */ if (s->bbio == s->wbio) { s->wbio = BIO_pop(s->wbio); } BIO_free(s->bbio); s->bbio = NULL; } if (s->rbio != NULL) { BIO_free_all(s->rbio); } if (s->wbio != NULL && s->wbio != s->rbio) { BIO_free_all(s->wbio); } if (s->init_buf != NULL) { BUF_MEM_free(s->init_buf); } /* add extra stuff */ if (s->cipher_list != NULL) { ssl_cipher_preference_list_free(s->cipher_list); } if (s->cipher_list_by_id != NULL) { sk_SSL_CIPHER_free(s->cipher_list_by_id); } if (s->session != NULL) { ssl_clear_bad_session(s); SSL_SESSION_free(s->session); } ssl_clear_cipher_ctx(s); if (s->cert != NULL) { ssl_cert_free(s->cert); } if (s->tlsext_hostname) { OPENSSL_free(s->tlsext_hostname); } if (s->initial_ctx) { SSL_CTX_free(s->initial_ctx); } if (s->tlsext_ecpointformatlist) { OPENSSL_free(s->tlsext_ecpointformatlist); } if (s->tlsext_ellipticcurvelist) { OPENSSL_free(s->tlsext_ellipticcurvelist); } if (s->alpn_client_proto_list) { OPENSSL_free(s->alpn_client_proto_list); } if (s->tlsext_channel_id_private) { EVP_PKEY_free(s->tlsext_channel_id_private); } if (s->psk_identity_hint) { OPENSSL_free(s->psk_identity_hint); } if (s->client_CA != NULL) { sk_X509_NAME_pop_free(s->client_CA, X509_NAME_free); } if (s->next_proto_negotiated) { OPENSSL_free(s->next_proto_negotiated); } if (s->srtp_profiles) { sk_SRTP_PROTECTION_PROFILE_free(s->srtp_profiles); } if (s->method != NULL) { s->method->ssl_free(s); } if (s->ctx) { SSL_CTX_free(s->ctx); } OPENSSL_free(s); } void SSL_set_bio(SSL *s, BIO *rbio, BIO *wbio) { /* If the output buffering BIO is still in place, remove it. */ if (s->bbio != NULL) { if (s->wbio == s->bbio) { s->wbio = s->wbio->next_bio; s->bbio->next_bio = NULL; } } if (s->rbio != NULL && s->rbio != rbio) { BIO_free_all(s->rbio); } if (s->wbio != NULL && s->wbio != wbio && s->rbio != s->wbio) { BIO_free_all(s->wbio); } s->rbio = rbio; s->wbio = wbio; } BIO *SSL_get_rbio(const SSL *s) { return s->rbio; } BIO *SSL_get_wbio(const SSL *s) { return s->wbio; } int SSL_get_fd(const SSL *s) { return SSL_get_rfd(s); } int SSL_get_rfd(const SSL *s) { int ret = -1; BIO *b, *r; b = SSL_get_rbio(s); r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); if (r != NULL) { BIO_get_fd(r, &ret); } return ret; } int SSL_get_wfd(const SSL *s) { int ret = -1; BIO *b, *r; b = SSL_get_wbio(s); r = BIO_find_type(b, BIO_TYPE_DESCRIPTOR); if (r != NULL) { BIO_get_fd(r, &ret); } return ret; } int SSL_set_fd(SSL *s, int fd) { int ret = 0; BIO *bio = NULL; bio = BIO_new(BIO_s_fd()); if (bio == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_set_fd, ERR_R_BUF_LIB); goto err; } BIO_set_fd(bio, fd, BIO_NOCLOSE); SSL_set_bio(s, bio, bio); ret = 1; err: return ret; } int SSL_set_wfd(SSL *s, int fd) { int ret = 0; BIO *bio = NULL; if (s->rbio == NULL || BIO_method_type(s->rbio) != BIO_TYPE_FD || (int)BIO_get_fd(s->rbio, NULL) != fd) { bio = BIO_new(BIO_s_fd()); if (bio == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_set_wfd, ERR_R_BUF_LIB); goto err; } BIO_set_fd(bio, fd, BIO_NOCLOSE); SSL_set_bio(s, SSL_get_rbio(s), bio); } else { SSL_set_bio(s, SSL_get_rbio(s), SSL_get_rbio(s)); } ret = 1; err: return ret; } int SSL_set_rfd(SSL *s, int fd) { int ret = 0; BIO *bio = NULL; if (s->wbio == NULL || BIO_method_type(s->wbio) != BIO_TYPE_FD || (int)BIO_get_fd(s->wbio, NULL) != fd) { bio = BIO_new(BIO_s_fd()); if (bio == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_set_rfd, ERR_R_BUF_LIB); goto err; } BIO_set_fd(bio, fd, BIO_NOCLOSE); SSL_set_bio(s, bio, SSL_get_wbio(s)); } else { SSL_set_bio(s, SSL_get_wbio(s), SSL_get_wbio(s)); } ret = 1; err: return ret; } /* return length of latest Finished message we sent, copy to 'buf' */ size_t SSL_get_finished(const SSL *s, void *buf, size_t count) { size_t ret = 0; if (s->s3 != NULL) { ret = s->s3->tmp.finish_md_len; if (count > ret) { count = ret; } memcpy(buf, s->s3->tmp.finish_md, count); } return ret; } /* return length of latest Finished message we expected, copy to 'buf' */ size_t SSL_get_peer_finished(const SSL *s, void *buf, size_t count) { size_t ret = 0; if (s->s3 != NULL) { ret = s->s3->tmp.peer_finish_md_len; if (count > ret) { count = ret; } memcpy(buf, s->s3->tmp.peer_finish_md, count); } return ret; } int SSL_get_verify_mode(const SSL *s) { return s->verify_mode; } int SSL_get_verify_depth(const SSL *s) { return X509_VERIFY_PARAM_get_depth(s->param); } int (*SSL_get_verify_callback(const SSL *s))(int, X509_STORE_CTX *) { return s->verify_callback; } int SSL_CTX_get_verify_mode(const SSL_CTX *ctx) { return ctx->verify_mode; } int SSL_CTX_get_verify_depth(const SSL_CTX *ctx) { return X509_VERIFY_PARAM_get_depth(ctx->param); } int (*SSL_CTX_get_verify_callback(const SSL_CTX *ctx))(int, X509_STORE_CTX *) { return ctx->default_verify_callback; } void SSL_set_verify(SSL *s, int mode, int (*callback)(int ok, X509_STORE_CTX *ctx)) { s->verify_mode = mode; if (callback != NULL) { s->verify_callback = callback; } } void SSL_set_verify_depth(SSL *s, int depth) { X509_VERIFY_PARAM_set_depth(s->param, depth); } void SSL_set_read_ahead(SSL *s, int yes) { s->read_ahead = yes; } int SSL_get_read_ahead(const SSL *s) { return s->read_ahead; } int SSL_pending(const SSL *s) { /* SSL_pending cannot work properly if read-ahead is enabled * (SSL_[CTX_]ctrl(..., SSL_CTRL_SET_READ_AHEAD, 1, NULL)), and it is * impossible to fix since SSL_pending cannot report errors that may be * observed while scanning the new data. (Note that SSL_pending() is often * used as a boolean value, so we'd better not return -1.). */ return s->method->ssl_pending(s); } X509 *SSL_get_peer_certificate(const SSL *s) { X509 *r; if (s == NULL || s->session == NULL) { r = NULL; } else { r = s->session->peer; } if (r == NULL) { return NULL; } return X509_up_ref(r); } STACK_OF(X509) * SSL_get_peer_cert_chain(const SSL *s) { STACK_OF(X509) * r; if (s == NULL || s->session == NULL || s->session->sess_cert == NULL) { r = NULL; } else { r = s->session->sess_cert->cert_chain; } /* If we are a client, cert_chain includes the peer's own certificate; if we * are a server, it does not. */ return r; } /* Fix this so it checks all the valid key/cert options */ int SSL_CTX_check_private_key(const SSL_CTX *ctx) { if (ctx == NULL || ctx->cert == NULL || ctx->cert->key->x509 == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_CTX_check_private_key, SSL_R_NO_CERTIFICATE_ASSIGNED); return 0; } if (ctx->cert->key->privatekey == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_CTX_check_private_key, SSL_R_NO_PRIVATE_KEY_ASSIGNED); return 0; } return X509_check_private_key(ctx->cert->key->x509, ctx->cert->key->privatekey); } /* Fix this function so that it takes an optional type parameter */ int SSL_check_private_key(const SSL *ssl) { if (ssl == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_check_private_key, ERR_R_PASSED_NULL_PARAMETER); return 0; } if (ssl->cert == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_check_private_key, SSL_R_NO_CERTIFICATE_ASSIGNED); return 0; } if (ssl->cert->key->x509 == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_check_private_key, SSL_R_NO_CERTIFICATE_ASSIGNED); return 0; } if (ssl->cert->key->privatekey == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_check_private_key, SSL_R_NO_PRIVATE_KEY_ASSIGNED); return 0; } return X509_check_private_key(ssl->cert->key->x509, ssl->cert->key->privatekey); } int SSL_accept(SSL *s) { if (s->handshake_func == 0) { /* Not properly initialized yet */ SSL_set_accept_state(s); } if (s->handshake_func != s->method->ssl_accept) { OPENSSL_PUT_ERROR(SSL, SSL_accept, ERR_R_INTERNAL_ERROR); return -1; } return s->handshake_func(s); } int SSL_connect(SSL *s) { if (s->handshake_func == 0) { /* Not properly initialized yet */ SSL_set_connect_state(s); } if (s->handshake_func != s->method->ssl_connect) { OPENSSL_PUT_ERROR(SSL, SSL_connect, ERR_R_INTERNAL_ERROR); return -1; } return s->handshake_func(s); } long SSL_get_default_timeout(const SSL *s) { return SSL_DEFAULT_SESSION_TIMEOUT; } int SSL_read(SSL *s, void *buf, int num) { if (s->handshake_func == 0) { OPENSSL_PUT_ERROR(SSL, SSL_read, SSL_R_UNINITIALIZED); return -1; } if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { s->rwstate = SSL_NOTHING; return 0; } return s->method->ssl_read(s, buf, num); } int SSL_peek(SSL *s, void *buf, int num) { if (s->handshake_func == 0) { OPENSSL_PUT_ERROR(SSL, SSL_peek, SSL_R_UNINITIALIZED); return -1; } if (s->shutdown & SSL_RECEIVED_SHUTDOWN) { return 0; } return s->method->ssl_peek(s, buf, num); } int SSL_write(SSL *s, const void *buf, int num) { if (s->handshake_func == 0) { OPENSSL_PUT_ERROR(SSL, SSL_write, SSL_R_UNINITIALIZED); return -1; } if (s->shutdown & SSL_SENT_SHUTDOWN) { s->rwstate = SSL_NOTHING; OPENSSL_PUT_ERROR(SSL, SSL_write, SSL_R_PROTOCOL_IS_SHUTDOWN); return -1; } return s->method->ssl_write(s, buf, num); } int SSL_shutdown(SSL *s) { /* Note that this function behaves differently from what one might expect. * Return values are 0 for no success (yet), 1 for success; but calling it * once is usually not enough, even if blocking I/O is used (see * ssl3_shutdown). */ if (s->handshake_func == 0) { OPENSSL_PUT_ERROR(SSL, SSL_shutdown, SSL_R_UNINITIALIZED); return -1; } if (!SSL_in_init(s)) { return s->method->ssl_shutdown(s); } return 1; } int SSL_renegotiate(SSL *s) { if (SSL_IS_DTLS(s)) { /* Renegotiation is not supported for DTLS. */ OPENSSL_PUT_ERROR(SSL, SSL_renegotiate, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); return 0; } if (s->renegotiate == 0) { s->renegotiate = 1; } s->new_session = 1; return s->method->ssl_renegotiate(s); } int SSL_renegotiate_pending(SSL *s) { /* becomes true when negotiation is requested; false again once a handshake * has finished */ return s->renegotiate != 0; } long SSL_ctrl(SSL *s, int cmd, long larg, void *parg) { long l; switch (cmd) { case SSL_CTRL_GET_READ_AHEAD: return s->read_ahead; case SSL_CTRL_SET_READ_AHEAD: l = s->read_ahead; s->read_ahead = larg; return l; case SSL_CTRL_SET_MSG_CALLBACK_ARG: s->msg_callback_arg = parg; return 1; case SSL_CTRL_OPTIONS: return s->options |= larg; case SSL_CTRL_CLEAR_OPTIONS: return s->options &= ~larg; case SSL_CTRL_MODE: return s->mode |= larg; case SSL_CTRL_CLEAR_MODE: return s->mode &= ~larg; case SSL_CTRL_GET_MAX_CERT_LIST: return s->max_cert_list; case SSL_CTRL_SET_MAX_CERT_LIST: l = s->max_cert_list; s->max_cert_list = larg; return l; case SSL_CTRL_SET_MTU: if (larg < (long)dtls1_min_mtu()) { return 0; } if (SSL_IS_DTLS(s)) { s->d1->mtu = larg; return larg; } return 0; case SSL_CTRL_SET_MAX_SEND_FRAGMENT: if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) { return 0; } s->max_send_fragment = larg; return 1; case SSL_CTRL_GET_RI_SUPPORT: if (s->s3) { return s->s3->send_connection_binding; } return 0; case SSL_CTRL_CERT_FLAGS: return s->cert->cert_flags |= larg; case SSL_CTRL_CLEAR_CERT_FLAGS: return s->cert->cert_flags &= ~larg; case SSL_CTRL_GET_RAW_CIPHERLIST: if (parg) { if (s->cert->ciphers_raw == NULL) { return 0; } *(uint8_t **)parg = s->cert->ciphers_raw; return (int)s->cert->ciphers_rawlen; } /* Passing a NULL |parg| returns the size of a single * cipher suite value. */ return 2; default: return s->method->ssl_ctrl(s, cmd, larg, parg); } } long SSL_callback_ctrl(SSL *s, int cmd, void (*fp)(void)) { switch (cmd) { case SSL_CTRL_SET_MSG_CALLBACK: s->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp); return 1; default: return s->method->ssl_callback_ctrl(s, cmd, fp); } } LHASH_OF(SSL_SESSION) *SSL_CTX_sessions(SSL_CTX *ctx) { return ctx->sessions; } long SSL_CTX_ctrl(SSL_CTX *ctx, int cmd, long larg, void *parg) { long l; switch (cmd) { case SSL_CTRL_GET_READ_AHEAD: return ctx->read_ahead; case SSL_CTRL_SET_READ_AHEAD: l = ctx->read_ahead; ctx->read_ahead = larg; return l; case SSL_CTRL_SET_MSG_CALLBACK_ARG: ctx->msg_callback_arg = parg; return 1; case SSL_CTRL_GET_MAX_CERT_LIST: return ctx->max_cert_list; case SSL_CTRL_SET_MAX_CERT_LIST: l = ctx->max_cert_list; ctx->max_cert_list = larg; return l; case SSL_CTRL_SET_SESS_CACHE_SIZE: l = ctx->session_cache_size; ctx->session_cache_size = larg; return l; case SSL_CTRL_GET_SESS_CACHE_SIZE: return ctx->session_cache_size; case SSL_CTRL_SET_SESS_CACHE_MODE: l = ctx->session_cache_mode; ctx->session_cache_mode = larg; return l; case SSL_CTRL_GET_SESS_CACHE_MODE: return ctx->session_cache_mode; case SSL_CTRL_SESS_NUMBER: return lh_SSL_SESSION_num_items(ctx->sessions); case SSL_CTRL_SESS_CONNECT: case SSL_CTRL_SESS_CONNECT_GOOD: case SSL_CTRL_SESS_CONNECT_RENEGOTIATE: case SSL_CTRL_SESS_ACCEPT: case SSL_CTRL_SESS_ACCEPT_GOOD: case SSL_CTRL_SESS_ACCEPT_RENEGOTIATE: case SSL_CTRL_SESS_HIT: case SSL_CTRL_SESS_CB_HIT: case SSL_CTRL_SESS_MISSES: case SSL_CTRL_SESS_TIMEOUTS: case SSL_CTRL_SESS_CACHE_FULL: /* Statistics are no longer supported. * TODO(davidben): Try to remove the accessors altogether. */ return 0; case SSL_CTRL_OPTIONS: return ctx->options |= larg; case SSL_CTRL_CLEAR_OPTIONS: return ctx->options &= ~larg; case SSL_CTRL_MODE: return ctx->mode |= larg; case SSL_CTRL_CLEAR_MODE: return ctx->mode &= ~larg; case SSL_CTRL_SET_MAX_SEND_FRAGMENT: if (larg < 512 || larg > SSL3_RT_MAX_PLAIN_LENGTH) { return 0; } ctx->max_send_fragment = larg; return 1; case SSL_CTRL_CERT_FLAGS: return ctx->cert->cert_flags |= larg; case SSL_CTRL_CLEAR_CERT_FLAGS: return ctx->cert->cert_flags &= ~larg; default: return ctx->method->ssl_ctx_ctrl(ctx, cmd, larg, parg); } } long SSL_CTX_callback_ctrl(SSL_CTX *ctx, int cmd, void (*fp)(void)) { switch (cmd) { case SSL_CTRL_SET_MSG_CALLBACK: ctx->msg_callback = (void (*)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg))(fp); return 1; default: return ctx->method->ssl_ctx_callback_ctrl(ctx, cmd, fp); } } int ssl_cipher_id_cmp(const void *in_a, const void *in_b) { long l; const SSL_CIPHER *a = in_a; const SSL_CIPHER *b = in_b; const long a_id = a->id; const long b_id = b->id; l = a_id - b_id; if (l == 0L) { return 0; } else { return (l > 0) ? 1 : -1; } } int ssl_cipher_ptr_id_cmp(const SSL_CIPHER **ap, const SSL_CIPHER **bp) { long l; const long a_id = (*ap)->id; const long b_id = (*bp)->id; l = a_id - b_id; if (l == 0) { return 0; } else { return (l > 0) ? 1 : -1; } } /* return a STACK of the ciphers available for the SSL and in order of * preference */ STACK_OF(SSL_CIPHER) * SSL_get_ciphers(const SSL *s) { if (s == NULL) { return NULL; } if (s->cipher_list != NULL) { return s->cipher_list->ciphers; } if (s->version >= TLS1_1_VERSION && s->ctx != NULL && s->ctx->cipher_list_tls11 != NULL) { return s->ctx->cipher_list_tls11->ciphers; } if (s->ctx != NULL && s->ctx->cipher_list != NULL) { return s->ctx->cipher_list->ciphers; } return NULL; } /* return a STACK of the ciphers available for the SSL and in order of * algorithm id */ STACK_OF(SSL_CIPHER) * ssl_get_ciphers_by_id(SSL *s) { if (s == NULL) { return NULL; } if (s->cipher_list_by_id != NULL) { return s->cipher_list_by_id; } if (s->ctx != NULL && s->ctx->cipher_list_by_id != NULL) { return s->ctx->cipher_list_by_id; } return NULL; } /* The old interface to get the same thing as SSL_get_ciphers() */ const char *SSL_get_cipher_list(const SSL *s, int n) { const SSL_CIPHER *c; STACK_OF(SSL_CIPHER) * sk; if (s == NULL) { return NULL; } sk = SSL_get_ciphers(s); if (sk == NULL || n < 0 || (size_t)n >= sk_SSL_CIPHER_num(sk)) { return NULL; } c = sk_SSL_CIPHER_value(sk, n); if (c == NULL) { return NULL; } return c->name; } /* specify the ciphers to be used by default by the SSL_CTX */ int SSL_CTX_set_cipher_list(SSL_CTX *ctx, const char *str) { STACK_OF(SSL_CIPHER) *sk; sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list, &ctx->cipher_list_by_id, str, ctx->cert); /* ssl_create_cipher_list may return an empty stack if it was unable to find * a cipher matching the given rule string (for example if the rule string * specifies a cipher which has been disabled). This is not an error as far * as ssl_create_cipher_list is concerned, and hence ctx->cipher_list and * ctx->cipher_list_by_id has been updated. */ if (sk == NULL) { return 0; } else if (sk_SSL_CIPHER_num(sk) == 0) { OPENSSL_PUT_ERROR(SSL, SSL_CTX_set_cipher_list, SSL_R_NO_CIPHER_MATCH); return 0; } return 1; } int SSL_CTX_set_cipher_list_tls11(SSL_CTX *ctx, const char *str) { STACK_OF(SSL_CIPHER) *sk; sk = ssl_create_cipher_list(ctx->method, &ctx->cipher_list_tls11, NULL, str, ctx->cert); if (sk == NULL) { return 0; } else if (sk_SSL_CIPHER_num(sk) == 0) { OPENSSL_PUT_ERROR(SSL, SSL_CTX_set_cipher_list_tls11, SSL_R_NO_CIPHER_MATCH); return 0; } return 1; } /* specify the ciphers to be used by the SSL */ int SSL_set_cipher_list(SSL *s, const char *str) { STACK_OF(SSL_CIPHER) *sk; sk = ssl_create_cipher_list(s->ctx->method, &s->cipher_list, &s->cipher_list_by_id, str, s->cert); /* see comment in SSL_CTX_set_cipher_list */ if (sk == NULL) { return 0; } else if (sk_SSL_CIPHER_num(sk) == 0) { OPENSSL_PUT_ERROR(SSL, SSL_set_cipher_list, SSL_R_NO_CIPHER_MATCH); return 0; } return 1; } int ssl_cipher_list_to_bytes(SSL *s, STACK_OF(SSL_CIPHER) *sk, uint8_t *p) { size_t i; const SSL_CIPHER *c; CERT *ct = s->cert; uint8_t *q; /* Set disabled masks for this session */ ssl_set_client_disabled(s); if (sk == NULL) { return 0; } q = p; for (i = 0; i < sk_SSL_CIPHER_num(sk); i++) { c = sk_SSL_CIPHER_value(sk, i); /* Skip disabled ciphers */ if (c->algorithm_ssl & ct->mask_ssl || c->algorithm_mkey & ct->mask_k || c->algorithm_auth & ct->mask_a) { continue; } s2n(ssl3_get_cipher_value(c), p); } /* If all ciphers were disabled, return the error to the caller. */ if (p == q) { return 0; } /* Add SCSVs. */ if (!s->renegotiate) { s2n(SSL3_CK_SCSV & 0xffff, p); } if (s->mode & SSL_MODE_SEND_FALLBACK_SCSV) { s2n(SSL3_CK_FALLBACK_SCSV & 0xffff, p); } return p - q; } STACK_OF(SSL_CIPHER) *ssl_bytes_to_cipher_list(SSL *s, const CBS *cbs) { CBS cipher_suites = *cbs; const SSL_CIPHER *c; STACK_OF(SSL_CIPHER) * sk; if (s->s3) { s->s3->send_connection_binding = 0; } if (CBS_len(&cipher_suites) % 2 != 0) { OPENSSL_PUT_ERROR(SSL, ssl_bytes_to_cipher_list, SSL_R_ERROR_IN_RECEIVED_CIPHER_LIST); return NULL; } sk = sk_SSL_CIPHER_new_null(); if (sk == NULL) { OPENSSL_PUT_ERROR(SSL, ssl_bytes_to_cipher_list, ERR_R_MALLOC_FAILURE); goto err; } if (!CBS_stow(&cipher_suites, &s->cert->ciphers_raw, &s->cert->ciphers_rawlen)) { OPENSSL_PUT_ERROR(SSL, ssl_bytes_to_cipher_list, ERR_R_MALLOC_FAILURE); goto err; } while (CBS_len(&cipher_suites) > 0) { uint16_t cipher_suite; if (!CBS_get_u16(&cipher_suites, &cipher_suite)) { OPENSSL_PUT_ERROR(SSL, ssl_bytes_to_cipher_list, ERR_R_INTERNAL_ERROR); goto err; } /* Check for SCSV. */ if (s->s3 && cipher_suite == (SSL3_CK_SCSV & 0xffff)) { /* SCSV is fatal if renegotiating. */ if (s->renegotiate) { OPENSSL_PUT_ERROR(SSL, ssl_bytes_to_cipher_list, SSL_R_SCSV_RECEIVED_WHEN_RENEGOTIATING); ssl3_send_alert(s, SSL3_AL_FATAL, SSL_AD_HANDSHAKE_FAILURE); goto err; } s->s3->send_connection_binding = 1; continue; } /* Check for FALLBACK_SCSV. */ if (s->s3 && cipher_suite == (SSL3_CK_FALLBACK_SCSV & 0xffff)) { uint16_t max_version = ssl3_get_max_server_version(s); if (SSL_IS_DTLS(s) ? (uint16_t)s->version > max_version : (uint16_t)s->version < max_version) { OPENSSL_PUT_ERROR(SSL, ssl_bytes_to_cipher_list, SSL_R_INAPPROPRIATE_FALLBACK); ssl3_send_alert(s, SSL3_AL_FATAL, SSL3_AD_INAPPROPRIATE_FALLBACK); goto err; } continue; } c = ssl3_get_cipher_by_value(cipher_suite); if (c != NULL && !sk_SSL_CIPHER_push(sk, c)) { OPENSSL_PUT_ERROR(SSL, ssl_bytes_to_cipher_list, ERR_R_MALLOC_FAILURE); goto err; } } return sk; err: if (sk != NULL) { sk_SSL_CIPHER_free(sk); } return NULL; } /* return a servername extension value if provided in Client Hello, or NULL. So * far, only host_name types are defined (RFC 3546). */ const char *SSL_get_servername(const SSL *s, const int type) { if (type != TLSEXT_NAMETYPE_host_name) { return NULL; } return s->session && !s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname; } int SSL_get_servername_type(const SSL *s) { if (s->session && (!s->tlsext_hostname ? s->session->tlsext_hostname : s->tlsext_hostname)) { return TLSEXT_NAMETYPE_host_name; } return -1; } void SSL_CTX_enable_signed_cert_timestamps(SSL_CTX *ctx) { ctx->signed_cert_timestamps_enabled = 1; } int SSL_enable_signed_cert_timestamps(SSL *ssl) { ssl->signed_cert_timestamps_enabled = 1; return 1; } void SSL_CTX_enable_ocsp_stapling(SSL_CTX *ctx) { ctx->ocsp_stapling_enabled = 1; } int SSL_enable_ocsp_stapling(SSL *ssl) { ssl->ocsp_stapling_enabled = 1; return 1; } void SSL_get0_signed_cert_timestamp_list(const SSL *ssl, const uint8_t **out, size_t *out_len) { SSL_SESSION *session = ssl->session; *out_len = 0; *out = NULL; if (ssl->server || !session || !session->tlsext_signed_cert_timestamp_list) { return; } *out = session->tlsext_signed_cert_timestamp_list; *out_len = session->tlsext_signed_cert_timestamp_list_length; } void SSL_get0_ocsp_response(const SSL *ssl, const uint8_t **out, size_t *out_len) { SSL_SESSION *session = ssl->session; *out_len = 0; *out = NULL; if (ssl->server || !session || !session->ocsp_response) { return; } *out = session->ocsp_response; *out_len = session->ocsp_response_length; } /* SSL_select_next_proto implements the standard protocol selection. It is * expected that this function is called from the callback set by * SSL_CTX_set_next_proto_select_cb. * * The protocol data is assumed to be a vector of 8-bit, length prefixed byte * strings. The length byte itself is not included in the length. A byte * string of length 0 is invalid. No byte string may be truncated. * * The current, but experimental algorithm for selecting the protocol is: * * 1) If the server doesn't support NPN then this is indicated to the * callback. In this case, the client application has to abort the connection * or have a default application level protocol. * * 2) If the server supports NPN, but advertises an empty list then the * client selects the first protcol in its list, but indicates via the * API that this fallback case was enacted. * * 3) Otherwise, the client finds the first protocol in the server's list * that it supports and selects this protocol. This is because it's * assumed that the server has better information about which protocol * a client should use. * * 4) If the client doesn't support any of the server's advertised * protocols, then this is treated the same as case 2. * * It returns either * OPENSSL_NPN_NEGOTIATED if a common protocol was found, or * OPENSSL_NPN_NO_OVERLAP if the fallback case was reached. */ int SSL_select_next_proto(uint8_t **out, uint8_t *outlen, const uint8_t *server, unsigned int server_len, const uint8_t *client, unsigned int client_len) { unsigned int i, j; const uint8_t *result; int status = OPENSSL_NPN_UNSUPPORTED; /* For each protocol in server preference order, see if we support it. */ for (i = 0; i < server_len;) { for (j = 0; j < client_len;) { if (server[i] == client[j] && memcmp(&server[i + 1], &client[j + 1], server[i]) == 0) { /* We found a match */ result = &server[i]; status = OPENSSL_NPN_NEGOTIATED; goto found; } j += client[j]; j++; } i += server[i]; i++; } /* There's no overlap between our protocols and the server's list. */ result = client; status = OPENSSL_NPN_NO_OVERLAP; found: *out = (uint8_t *)result + 1; *outlen = result[0]; return status; } /* SSL_get0_next_proto_negotiated sets *data and *len to point to the client's * requested protocol for this connection and returns 0. If the client didn't * request any protocol, then *data is set to NULL. * * Note that the client can request any protocol it chooses. The value returned * from this function need not be a member of the list of supported protocols * provided by the callback. */ void SSL_get0_next_proto_negotiated(const SSL *s, const uint8_t **data, unsigned *len) { *data = s->next_proto_negotiated; if (!*data) { *len = 0; } else { *len = s->next_proto_negotiated_len; } } /* SSL_CTX_set_next_protos_advertised_cb sets a callback that is called when a * TLS server needs a list of supported protocols for Next Protocol * Negotiation. The returned list must be in wire format. The list is returned * by setting |out| to point to it and |outlen| to its length. This memory will * not be modified, but one should assume that the SSL* keeps a reference to * it. * * The callback should return SSL_TLSEXT_ERR_OK if it wishes to advertise. * Otherwise, no such extension will be included in the ServerHello. */ void SSL_CTX_set_next_protos_advertised_cb( SSL_CTX *ctx, int (*cb)(SSL *ssl, const uint8_t **out, unsigned int *outlen, void *arg), void *arg) { ctx->next_protos_advertised_cb = cb; ctx->next_protos_advertised_cb_arg = arg; } /* SSL_CTX_set_next_proto_select_cb sets a callback that is called when a * client needs to select a protocol from the server's provided list. |out| * must be set to point to the selected protocol (which may be within |in|). * The length of the protocol name must be written into |outlen|. The server's * advertised protocols are provided in |in| and |inlen|. The callback can * assume that |in| is syntactically valid. * * The client must select a protocol. It is fatal to the connection if this * callback returns a value other than SSL_TLSEXT_ERR_OK. */ void SSL_CTX_set_next_proto_select_cb( SSL_CTX *ctx, int (*cb)(SSL *s, uint8_t **out, uint8_t *outlen, const uint8_t *in, unsigned int inlen, void *arg), void *arg) { ctx->next_proto_select_cb = cb; ctx->next_proto_select_cb_arg = arg; } int SSL_CTX_set_alpn_protos(SSL_CTX *ctx, const uint8_t *protos, unsigned protos_len) { if (ctx->alpn_client_proto_list) { OPENSSL_free(ctx->alpn_client_proto_list); } ctx->alpn_client_proto_list = BUF_memdup(protos, protos_len); if (!ctx->alpn_client_proto_list) { return 1; } ctx->alpn_client_proto_list_len = protos_len; return 0; } int SSL_set_alpn_protos(SSL *ssl, const uint8_t *protos, unsigned protos_len) { if (ssl->alpn_client_proto_list) { OPENSSL_free(ssl->alpn_client_proto_list); } ssl->alpn_client_proto_list = BUF_memdup(protos, protos_len); if (!ssl->alpn_client_proto_list) { return 1; } ssl->alpn_client_proto_list_len = protos_len; return 0; } /* SSL_CTX_set_alpn_select_cb sets a callback function on |ctx| that is called * during ClientHello processing in order to select an ALPN protocol from the * client's list of offered protocols. */ void SSL_CTX_set_alpn_select_cb(SSL_CTX *ctx, int (*cb)(SSL *ssl, const uint8_t **out, uint8_t *outlen, const uint8_t *in, unsigned int inlen, void *arg), void *arg) { ctx->alpn_select_cb = cb; ctx->alpn_select_cb_arg = arg; } /* SSL_get0_alpn_selected gets the selected ALPN protocol (if any) from |ssl|. * On return it sets |*data| to point to |*len| bytes of protocol name (not * including the leading length-prefix byte). If the server didn't respond with * a negotiated protocol then |*len| will be zero. */ void SSL_get0_alpn_selected(const SSL *ssl, const uint8_t **data, unsigned *len) { *data = NULL; if (ssl->s3) { *data = ssl->s3->alpn_selected; } if (*data == NULL) { *len = 0; } else { *len = ssl->s3->alpn_selected_len; } } int SSL_export_keying_material(SSL *s, uint8_t *out, size_t out_len, const char *label, size_t label_len, const uint8_t *context, size_t context_len, int use_context) { if (s->version < TLS1_VERSION) { return 0; } return s->enc_method->export_keying_material( s, out, out_len, label, label_len, context, context_len, use_context); } static uint32_t ssl_session_hash(const SSL_SESSION *a) { uint32_t hash = ((uint32_t)a->session_id[0]) || ((uint32_t)a->session_id[1] << 8) || ((uint32_t)a->session_id[2] << 16) || ((uint32_t)a->session_id[3] << 24); return hash; } /* NB: If this function (or indeed the hash function which uses a sort of * coarser function than this one) is changed, ensure * SSL_CTX_has_matching_session_id() is checked accordingly. It relies on being * able to construct an SSL_SESSION that will collide with any existing session * with a matching session ID. */ static int ssl_session_cmp(const SSL_SESSION *a, const SSL_SESSION *b) { if (a->ssl_version != b->ssl_version) { return 1; } if (a->session_id_length != b->session_id_length) { return 1; } return memcmp(a->session_id, b->session_id, a->session_id_length); } SSL_CTX *SSL_CTX_new(const SSL_METHOD *meth) { SSL_CTX *ret = NULL; if (meth == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_CTX_new, SSL_R_NULL_SSL_METHOD_PASSED); return NULL; } if (SSL_get_ex_data_X509_STORE_CTX_idx() < 0) { OPENSSL_PUT_ERROR(SSL, SSL_CTX_new, SSL_R_X509_VERIFICATION_SETUP_PROBLEMS); goto err; } ret = (SSL_CTX *)OPENSSL_malloc(sizeof(SSL_CTX)); if (ret == NULL) { goto err; } memset(ret, 0, sizeof(SSL_CTX)); ret->method = meth->method; ret->cert_store = NULL; ret->session_cache_mode = SSL_SESS_CACHE_SERVER; ret->session_cache_size = SSL_SESSION_CACHE_MAX_SIZE_DEFAULT; ret->session_cache_head = NULL; ret->session_cache_tail = NULL; /* We take the system default */ ret->session_timeout = SSL_DEFAULT_SESSION_TIMEOUT; ret->new_session_cb = 0; ret->remove_session_cb = 0; ret->get_session_cb = 0; ret->generate_session_id = 0; ret->references = 1; ret->quiet_shutdown = 0; ret->info_callback = NULL; ret->app_verify_callback = 0; ret->app_verify_arg = NULL; ret->max_cert_list = SSL_MAX_CERT_LIST_DEFAULT; ret->read_ahead = 0; ret->msg_callback = 0; ret->msg_callback_arg = NULL; ret->verify_mode = SSL_VERIFY_NONE; ret->sid_ctx_length = 0; ret->default_verify_callback = NULL; ret->cert = ssl_cert_new(); if (ret->cert == NULL) { goto err; } ret->default_passwd_callback = 0; ret->default_passwd_callback_userdata = NULL; ret->client_cert_cb = 0; ret->sessions = lh_SSL_SESSION_new(ssl_session_hash, ssl_session_cmp); if (ret->sessions == NULL) { goto err; } ret->cert_store = X509_STORE_new(); if (ret->cert_store == NULL) { goto err; } ssl_create_cipher_list(ret->method, &ret->cipher_list, &ret->cipher_list_by_id, SSL_DEFAULT_CIPHER_LIST, ret->cert); if (ret->cipher_list == NULL || sk_SSL_CIPHER_num(ret->cipher_list->ciphers) <= 0) { OPENSSL_PUT_ERROR(SSL, SSL_CTX_new, SSL_R_LIBRARY_HAS_NO_CIPHERS); goto err2; } ret->param = X509_VERIFY_PARAM_new(); if (!ret->param) { goto err; } ret->client_CA = sk_X509_NAME_new_null(); if (ret->client_CA == NULL) { goto err; } CRYPTO_new_ex_data(CRYPTO_EX_INDEX_SSL_CTX, ret, &ret->ex_data); ret->extra_certs = NULL; ret->max_send_fragment = SSL3_RT_MAX_PLAIN_LENGTH; ret->tlsext_servername_callback = 0; ret->tlsext_servername_arg = NULL; /* Setup RFC4507 ticket keys */ if (!RAND_bytes(ret->tlsext_tick_key_name, 16) || !RAND_bytes(ret->tlsext_tick_hmac_key, 16) || !RAND_bytes(ret->tlsext_tick_aes_key, 16)) { ret->options |= SSL_OP_NO_TICKET; } ret->tlsext_status_cb = 0; ret->tlsext_status_arg = NULL; ret->next_protos_advertised_cb = 0; ret->next_proto_select_cb = 0; ret->psk_identity_hint = NULL; ret->psk_client_callback = NULL; ret->psk_server_callback = NULL; /* Default is to connect to non-RI servers. When RI is more widely deployed * might change this. */ ret->options |= SSL_OP_LEGACY_SERVER_CONNECT; /* Lock the SSL_CTX to the specified version, for compatibility with legacy * uses of SSL_METHOD. */ if (meth->version != 0) { SSL_CTX_set_max_version(ret, meth->version); SSL_CTX_set_min_version(ret, meth->version); } return ret; err: OPENSSL_PUT_ERROR(SSL, SSL_CTX_new, ERR_R_MALLOC_FAILURE); err2: if (ret != NULL) { SSL_CTX_free(ret); } return NULL; } void SSL_CTX_free(SSL_CTX *a) { int i; if (a == NULL) { return; } i = CRYPTO_add(&a->references, -1, CRYPTO_LOCK_SSL_CTX); if (i > 0) { return; } if (a->param) { X509_VERIFY_PARAM_free(a->param); } /* Free internal session cache. However: the remove_cb() may reference the * ex_data of SSL_CTX, thus the ex_data store can only be removed after the * sessions were flushed. As the ex_data handling routines might also touch * the session cache, the most secure solution seems to be: empty (flush) the * cache, then free ex_data, then finally free the cache. (See ticket * [openssl.org #212].) */ if (a->sessions != NULL) { SSL_CTX_flush_sessions(a, 0); } CRYPTO_free_ex_data(CRYPTO_EX_INDEX_SSL_CTX, a, &a->ex_data); if (a->sessions != NULL) { lh_SSL_SESSION_free(a->sessions); } if (a->cert_store != NULL) { X509_STORE_free(a->cert_store); } if (a->cipher_list != NULL) { ssl_cipher_preference_list_free(a->cipher_list); } if (a->cipher_list_by_id != NULL) { sk_SSL_CIPHER_free(a->cipher_list_by_id); } if (a->cipher_list_tls11 != NULL) { ssl_cipher_preference_list_free(a->cipher_list_tls11); } if (a->cert != NULL) { ssl_cert_free(a->cert); } if (a->client_CA != NULL) { sk_X509_NAME_pop_free(a->client_CA, X509_NAME_free); } if (a->extra_certs != NULL) { sk_X509_pop_free(a->extra_certs, X509_free); } if (a->srtp_profiles) { sk_SRTP_PROTECTION_PROFILE_free(a->srtp_profiles); } if (a->psk_identity_hint) { OPENSSL_free(a->psk_identity_hint); } if (a->tlsext_ecpointformatlist) { OPENSSL_free(a->tlsext_ecpointformatlist); } if (a->tlsext_ellipticcurvelist) { OPENSSL_free(a->tlsext_ellipticcurvelist); } if (a->alpn_client_proto_list != NULL) { OPENSSL_free(a->alpn_client_proto_list); } if (a->tlsext_channel_id_private) { EVP_PKEY_free(a->tlsext_channel_id_private); } if (a->keylog_bio) { BIO_free(a->keylog_bio); } OPENSSL_free(a); } void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb) { ctx->default_passwd_callback = cb; } void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u) { ctx->default_passwd_callback_userdata = u; } void SSL_CTX_set_cert_verify_callback(SSL_CTX *ctx, int (*cb)(X509_STORE_CTX *, void *), void *arg) { ctx->app_verify_callback = cb; ctx->app_verify_arg = arg; } void SSL_CTX_set_verify(SSL_CTX *ctx, int mode, int (*cb)(int, X509_STORE_CTX *)) { ctx->verify_mode = mode; ctx->default_verify_callback = cb; } void SSL_CTX_set_verify_depth(SSL_CTX *ctx, int depth) { X509_VERIFY_PARAM_set_depth(ctx->param, depth); } void SSL_CTX_set_cert_cb(SSL_CTX *c, int (*cb)(SSL *ssl, void *arg), void *arg) { ssl_cert_set_cert_cb(c->cert, cb, arg); } void SSL_set_cert_cb(SSL *s, int (*cb)(SSL *ssl, void *arg), void *arg) { ssl_cert_set_cert_cb(s->cert, cb, arg); } static int ssl_has_key(SSL *s, size_t idx) { CERT_PKEY *cpk = &s->cert->pkeys[idx]; return cpk->x509 && cpk->privatekey; } void ssl_get_compatible_server_ciphers(SSL *s, unsigned long *out_mask_k, unsigned long *out_mask_a) { CERT *c = s->cert; int rsa_enc, rsa_sign, dh_tmp; unsigned long mask_k, mask_a; int have_ecc_cert, ecdsa_ok; int have_ecdh_tmp; X509 *x; if (c == NULL) { /* TODO(davidben): Is this codepath possible? */ *out_mask_k = 0; *out_mask_a = 0; return; } dh_tmp = (c->dh_tmp != NULL || c->dh_tmp_cb != NULL); have_ecdh_tmp = (c->ecdh_nid != NID_undef || c->ecdh_tmp_cb != NULL || c->ecdh_tmp_auto); rsa_enc = ssl_has_key(s, SSL_PKEY_RSA_ENC); rsa_sign = ssl_has_key(s, SSL_PKEY_RSA_SIGN); have_ecc_cert = ssl_has_key(s, SSL_PKEY_ECC); mask_k = 0; mask_a = 0; if (rsa_enc) { mask_k |= SSL_kRSA; } if (dh_tmp) { mask_k |= SSL_kDHE; } if (rsa_enc || rsa_sign) { mask_a |= SSL_aRSA; } mask_a |= SSL_aNULL; /* An ECC certificate may be usable for ECDSA cipher suites depending on the * key usage extension and on the client's curve preferences. */ if (have_ecc_cert) { x = c->pkeys[SSL_PKEY_ECC].x509; /* This call populates extension flags (ex_flags). */ X509_check_purpose(x, -1, 0); ecdsa_ok = (x->ex_flags & EXFLAG_KUSAGE) ? (x->ex_kusage & X509v3_KU_DIGITAL_SIGNATURE) : 1; if (!tls1_check_ec_cert(s, x)) { ecdsa_ok = 0; } if (ecdsa_ok) { mask_a |= SSL_aECDSA; } } /* If we are considering an ECC cipher suite that uses an ephemeral EC * key, check it. */ if (have_ecdh_tmp && tls1_check_ec_tmp_key(s)) { mask_k |= SSL_kECDHE; } /* PSK requires a server callback. */ if (s->psk_server_callback != NULL) { mask_k |= SSL_kPSK; mask_a |= SSL_aPSK; } *out_mask_k = mask_k; *out_mask_a = mask_a; } /* This handy macro borrowed from crypto/x509v3/v3_purp.c */ #define ku_reject(x, usage) \ (((x)->ex_flags & EXFLAG_KUSAGE) && !((x)->ex_kusage & (usage))) int ssl_check_srvr_ecc_cert_and_alg(X509 *x, SSL *s) { unsigned long alg_a; int signature_nid = 0, md_nid = 0, pk_nid = 0; const SSL_CIPHER *cs = s->s3->tmp.new_cipher; alg_a = cs->algorithm_auth; /* This call populates the ex_flags field correctly */ X509_check_purpose(x, -1, 0); if (x->sig_alg && x->sig_alg->algorithm) { signature_nid = OBJ_obj2nid(x->sig_alg->algorithm); OBJ_find_sigid_algs(signature_nid, &md_nid, &pk_nid); } if (alg_a & SSL_aECDSA) { /* key usage, if present, must allow signing */ if (ku_reject(x, X509v3_KU_DIGITAL_SIGNATURE)) { OPENSSL_PUT_ERROR(SSL, ssl_check_srvr_ecc_cert_and_alg, SSL_R_ECC_CERT_NOT_FOR_SIGNING); return 0; } } return 1; /* all checks are ok */ } static int ssl_get_server_cert_index(const SSL *s) { int idx; idx = ssl_cipher_get_cert_index(s->s3->tmp.new_cipher); if (idx == SSL_PKEY_RSA_ENC && !s->cert->pkeys[SSL_PKEY_RSA_ENC].x509) { idx = SSL_PKEY_RSA_SIGN; } if (idx == -1) { OPENSSL_PUT_ERROR(SSL, ssl_get_server_cert_index, ERR_R_INTERNAL_ERROR); } return idx; } CERT_PKEY *ssl_get_server_send_pkey(const SSL *s) { int i = ssl_get_server_cert_index(s); /* This may or may not be an error. */ if (i < 0) { return NULL; } /* May be NULL. */ return &s->cert->pkeys[i]; } EVP_PKEY *ssl_get_sign_pkey(SSL *s, const SSL_CIPHER *cipher) { unsigned long alg_a; CERT *c; int idx = -1; alg_a = cipher->algorithm_auth; c = s->cert; if (alg_a & SSL_aRSA) { if (c->pkeys[SSL_PKEY_RSA_SIGN].privatekey != NULL) { idx = SSL_PKEY_RSA_SIGN; } else if (c->pkeys[SSL_PKEY_RSA_ENC].privatekey != NULL) { idx = SSL_PKEY_RSA_ENC; } } else if ((alg_a & SSL_aECDSA) && (c->pkeys[SSL_PKEY_ECC].privatekey != NULL)) { idx = SSL_PKEY_ECC; } if (idx == -1) { OPENSSL_PUT_ERROR(SSL, ssl_get_sign_pkey, ERR_R_INTERNAL_ERROR); return NULL; } return c->pkeys[idx].privatekey; } void ssl_update_cache(SSL *s, int mode) { /* Never cache sessions with empty session IDs. */ if (s->session->session_id_length == 0) { return; } SSL_CTX *ctx = s->initial_ctx; if ((ctx->session_cache_mode & mode) == mode && !s->hit && ((ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE) || SSL_CTX_add_session(ctx, s->session)) && ctx->new_session_cb != NULL) { /* Note: |new_session_cb| is called whether the internal session cache is * used or not. */ if (!ctx->new_session_cb(s, SSL_SESSION_up_ref(s->session))) { SSL_SESSION_free(s->session); } } if (!(ctx->session_cache_mode & SSL_SESS_CACHE_NO_AUTO_CLEAR) && !(ctx->session_cache_mode & SSL_SESS_CACHE_NO_INTERNAL_STORE) && (ctx->session_cache_mode & mode) == mode) { /* Automatically flush the internal session cache every 255 connections. */ int flush_cache = 0; CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); ctx->handshakes_since_cache_flush++; if (ctx->handshakes_since_cache_flush >= 255) { flush_cache = 1; ctx->handshakes_since_cache_flush = 0; } CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); if (flush_cache) { SSL_CTX_flush_sessions(ctx, (unsigned long)time(NULL)); } } } int SSL_get_error(const SSL *s, int ret_code) { int reason; uint32_t err; BIO *bio; if (ret_code > 0) { return SSL_ERROR_NONE; } /* Make things return SSL_ERROR_SYSCALL when doing SSL_do_handshake etc, * where we do encode the error */ err = ERR_peek_error(); if (err != 0) { if (ERR_GET_LIB(err) == ERR_LIB_SYS) { return SSL_ERROR_SYSCALL; } return SSL_ERROR_SSL; } if (ret_code == 0) { if ((s->shutdown & SSL_RECEIVED_SHUTDOWN) && (s->s3->warn_alert == SSL_AD_CLOSE_NOTIFY)) { /* The socket was cleanly shut down with a close_notify. */ return SSL_ERROR_ZERO_RETURN; } /* An EOF was observed which violates the protocol, and the underlying * transport does not participate in the error queue. Bubble up to the * caller. */ return SSL_ERROR_SYSCALL; } if (SSL_want_session(s)) { return SSL_ERROR_PENDING_SESSION; } if (SSL_want_certificate(s)) { return SSL_ERROR_PENDING_CERTIFICATE; } if (SSL_want_read(s)) { bio = SSL_get_rbio(s); if (BIO_should_read(bio)) { return SSL_ERROR_WANT_READ; } if (BIO_should_write(bio)) { /* This one doesn't make too much sense ... We never try to write to the * rbio, and an application program where rbio and wbio are separate * couldn't even know what it should wait for. However if we ever set * s->rwstate incorrectly (so that we have SSL_want_read(s) instead of * SSL_want_write(s)) and rbio and wbio *are* the same, this test works * around that bug; so it might be safer to keep it. */ return SSL_ERROR_WANT_WRITE; } if (BIO_should_io_special(bio)) { reason = BIO_get_retry_reason(bio); if (reason == BIO_RR_CONNECT) { return SSL_ERROR_WANT_CONNECT; } if (reason == BIO_RR_ACCEPT) { return SSL_ERROR_WANT_ACCEPT; } return SSL_ERROR_SYSCALL; /* unknown */ } } if (SSL_want_write(s)) { bio = SSL_get_wbio(s); if (BIO_should_write(bio)) { return SSL_ERROR_WANT_WRITE; } if (BIO_should_read(bio)) { /* See above (SSL_want_read(s) with BIO_should_write(bio)) */ return SSL_ERROR_WANT_READ; } if (BIO_should_io_special(bio)) { reason = BIO_get_retry_reason(bio); if (reason == BIO_RR_CONNECT) { return SSL_ERROR_WANT_CONNECT; } if (reason == BIO_RR_ACCEPT) { return SSL_ERROR_WANT_ACCEPT; } return SSL_ERROR_SYSCALL; } } if (SSL_want_x509_lookup(s)) { return SSL_ERROR_WANT_X509_LOOKUP; } if (SSL_want_channel_id_lookup(s)) { return SSL_ERROR_WANT_CHANNEL_ID_LOOKUP; } return SSL_ERROR_SYSCALL; } int SSL_do_handshake(SSL *s) { int ret = 1; if (s->handshake_func == NULL) { OPENSSL_PUT_ERROR(SSL, SSL_do_handshake, SSL_R_CONNECTION_TYPE_NOT_SET); return -1; } s->method->ssl_renegotiate_check(s); if (SSL_in_init(s)) { ret = s->handshake_func(s); } return ret; } void SSL_set_accept_state(SSL *s) { s->server = 1; s->shutdown = 0; s->state = SSL_ST_ACCEPT | SSL_ST_BEFORE; s->handshake_func = s->method->ssl_accept; /* clear the current cipher */ ssl_clear_cipher_ctx(s); } void SSL_set_connect_state(SSL *s) { s->server = 0; s->shutdown = 0; s->state = SSL_ST_CONNECT | SSL_ST_BEFORE; s->handshake_func = s->method->ssl_connect; /* clear the current cipher */ ssl_clear_cipher_ctx(s); } int ssl_undefined_function(SSL *s) { OPENSSL_PUT_ERROR(SSL, ssl_undefined_function, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); return 0; } int ssl_undefined_void_function(void) { OPENSSL_PUT_ERROR(SSL, ssl_undefined_void_function, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); return 0; } int ssl_undefined_const_function(const SSL *s) { OPENSSL_PUT_ERROR(SSL, ssl_undefined_const_function, ERR_R_SHOULD_NOT_HAVE_BEEN_CALLED); return 0; } static const char *ssl_get_version(int version) { switch (version) { case TLS1_2_VERSION: return "TLSv1.2"; case TLS1_1_VERSION: return "TLSv1.1"; case TLS1_VERSION: return "TLSv1"; case SSL3_VERSION: return "SSLv3"; default: return "unknown"; } } const char *SSL_get_version(const SSL *s) { return ssl_get_version(s->version); } const char *SSL_SESSION_get_version(const SSL_SESSION *sess) { return ssl_get_version(sess->ssl_version); } void ssl_clear_cipher_ctx(SSL *s) { if (s->aead_read_ctx != NULL) { EVP_AEAD_CTX_cleanup(&s->aead_read_ctx->ctx); OPENSSL_free(s->aead_read_ctx); s->aead_read_ctx = NULL; } if (s->aead_write_ctx != NULL) { EVP_AEAD_CTX_cleanup(&s->aead_write_ctx->ctx); OPENSSL_free(s->aead_write_ctx); s->aead_write_ctx = NULL; } } X509 *SSL_get_certificate(const SSL *s) { if (s->cert != NULL) { return s->cert->key->x509; } return NULL; } EVP_PKEY *SSL_get_privatekey(const SSL *s) { if (s->cert != NULL) { return s->cert->key->privatekey; } return NULL; } X509 *SSL_CTX_get0_certificate(const SSL_CTX *ctx) { if (ctx->cert != NULL) { return ctx->cert->key->x509; } return NULL; } EVP_PKEY *SSL_CTX_get0_privatekey(const SSL_CTX *ctx) { if (ctx->cert != NULL) { return ctx->cert->key->privatekey; } return NULL; } const SSL_CIPHER *SSL_get_current_cipher(const SSL *s) { if (s->session != NULL && s->session->cipher != NULL) { return s->session->cipher; } return NULL; } const void *SSL_get_current_compression(SSL *s) { return NULL; } const void *SSL_get_current_expansion(SSL *s) { return NULL; } int ssl_init_wbio_buffer(SSL *s, int push) { BIO *bbio; if (s->bbio == NULL) { bbio = BIO_new(BIO_f_buffer()); if (bbio == NULL) { return 0; } s->bbio = bbio; } else { bbio = s->bbio; if (s->bbio == s->wbio) { s->wbio = BIO_pop(s->wbio); } } BIO_reset(bbio); if (!BIO_set_read_buffer_size(bbio, 1)) { OPENSSL_PUT_ERROR(SSL, ssl_init_wbio_buffer, ERR_R_BUF_LIB); return 0; } if (push) { if (s->wbio != bbio) { s->wbio = BIO_push(bbio, s->wbio); } } else { if (s->wbio == bbio) { s->wbio = BIO_pop(bbio); } } return 1; } void ssl_free_wbio_buffer(SSL *s) { if (s->bbio == NULL) { return; } if (s->bbio == s->wbio) { /* remove buffering */ s->wbio = BIO_pop(s->wbio); } BIO_free(s->bbio); s->bbio = NULL; } void SSL_CTX_set_quiet_shutdown(SSL_CTX *ctx, int mode) { ctx->quiet_shutdown = mode; } int SSL_CTX_get_quiet_shutdown(const SSL_CTX *ctx) { return ctx->quiet_shutdown; } void SSL_set_quiet_shutdown(SSL *s, int mode) { s->quiet_shutdown = mode; } int SSL_get_quiet_shutdown(const SSL *s) { return s->quiet_shutdown; } void SSL_set_shutdown(SSL *s, int mode) { s->shutdown = mode; } int SSL_get_shutdown(const SSL *s) { return s->shutdown; } int SSL_version(const SSL *s) { return s->version; } SSL_CTX *SSL_get_SSL_CTX(const SSL *ssl) { return ssl->ctx; } SSL_CTX *SSL_set_SSL_CTX(SSL *ssl, SSL_CTX *ctx) { if (ssl->ctx == ctx) { return ssl->ctx; } if (ctx == NULL) { ctx = ssl->initial_ctx; } if (ssl->cert != NULL) { ssl_cert_free(ssl->cert); } ssl->cert = ssl_cert_dup(ctx->cert); CRYPTO_add(&ctx->references, 1, CRYPTO_LOCK_SSL_CTX); if (ssl->ctx != NULL) { SSL_CTX_free(ssl->ctx); /* decrement reference count */ } ssl->ctx = ctx; ssl->sid_ctx_length = ctx->sid_ctx_length; assert(ssl->sid_ctx_length <= sizeof(ssl->sid_ctx)); memcpy(ssl->sid_ctx, ctx->sid_ctx, sizeof(ssl->sid_ctx)); return ssl->ctx; } int SSL_CTX_set_default_verify_paths(SSL_CTX *ctx) { return X509_STORE_set_default_paths(ctx->cert_store); } int SSL_CTX_load_verify_locations(SSL_CTX *ctx, const char *CAfile, const char *CApath) { return X509_STORE_load_locations(ctx->cert_store, CAfile, CApath); } void SSL_set_info_callback(SSL *ssl, void (*cb)(const SSL *ssl, int type, int val)) { ssl->info_callback = cb; } void (*SSL_get_info_callback(const SSL *ssl))(const SSL * /*ssl*/, int /*type*/, int /*val*/) { return ssl->info_callback; } int SSL_state(const SSL *ssl) { return ssl->state; } void SSL_set_state(SSL *ssl, int state) { ssl->state = state; } void SSL_set_verify_result(SSL *ssl, long arg) { ssl->verify_result = arg; } long SSL_get_verify_result(const SSL *ssl) { return ssl->verify_result; } int SSL_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) { return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL, argl, argp, new_func, dup_func, free_func); } int SSL_set_ex_data(SSL *s, int idx, void *arg) { return CRYPTO_set_ex_data(&s->ex_data, idx, arg); } void *SSL_get_ex_data(const SSL *s, int idx) { return CRYPTO_get_ex_data(&s->ex_data, idx); } int SSL_CTX_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func, CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func) { return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_SSL_CTX, argl, argp, new_func, dup_func, free_func); } int SSL_CTX_set_ex_data(SSL_CTX *s, int idx, void *arg) { return CRYPTO_set_ex_data(&s->ex_data, idx, arg); } void *SSL_CTX_get_ex_data(const SSL_CTX *s, int idx) { return CRYPTO_get_ex_data(&s->ex_data, idx); } int ssl_ok(SSL *s) { return 1; } X509_STORE *SSL_CTX_get_cert_store(const SSL_CTX *ctx) { return ctx->cert_store; } void SSL_CTX_set_cert_store(SSL_CTX *ctx, X509_STORE *store) { if (ctx->cert_store != NULL) { X509_STORE_free(ctx->cert_store); } ctx->cert_store = store; } int SSL_want(const SSL *s) { return s->rwstate; } void SSL_CTX_set_tmp_rsa_callback(SSL_CTX *ctx, RSA *(*cb)(SSL *ssl, int is_export, int keylength)) { SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_RSA_CB, (void (*)(void))cb); } void SSL_set_tmp_rsa_callback(SSL *ssl, RSA *(*cb)(SSL *ssl, int is_export, int keylength)) { SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_RSA_CB, (void (*)(void))cb); } void SSL_CTX_set_tmp_dh_callback(SSL_CTX *ctx, DH *(*dh)(SSL *ssl, int is_export, int keylength)) { SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); } void SSL_set_tmp_dh_callback(SSL *ssl, DH *(*dh)(SSL *ssl, int is_export, int keylength)) { SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_DH_CB, (void (*)(void))dh); } void SSL_CTX_set_tmp_ecdh_callback(SSL_CTX *ctx, EC_KEY *(*ecdh)(SSL *ssl, int is_export, int keylength)) { SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_TMP_ECDH_CB, (void (*)(void))ecdh); } void SSL_set_tmp_ecdh_callback(SSL *ssl, EC_KEY *(*ecdh)(SSL *ssl, int is_export, int keylength)) { SSL_callback_ctrl(ssl, SSL_CTRL_SET_TMP_ECDH_CB, (void (*)(void))ecdh); } int SSL_CTX_use_psk_identity_hint(SSL_CTX *ctx, const char *identity_hint) { if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { OPENSSL_PUT_ERROR(SSL, SSL_CTX_use_psk_identity_hint, SSL_R_DATA_LENGTH_TOO_LONG); return 0; } if (ctx->psk_identity_hint != NULL) { OPENSSL_free(ctx->psk_identity_hint); } if (identity_hint != NULL) { ctx->psk_identity_hint = BUF_strdup(identity_hint); if (ctx->psk_identity_hint == NULL) { return 0; } } else { ctx->psk_identity_hint = NULL; } return 1; } int SSL_use_psk_identity_hint(SSL *s, const char *identity_hint) { if (s == NULL) { return 0; } if (identity_hint != NULL && strlen(identity_hint) > PSK_MAX_IDENTITY_LEN) { OPENSSL_PUT_ERROR(SSL, SSL_use_psk_identity_hint, SSL_R_DATA_LENGTH_TOO_LONG); return 0; } /* Clear currently configured hint, if any. */ if (s->psk_identity_hint != NULL) { OPENSSL_free(s->psk_identity_hint); s->psk_identity_hint = NULL; } if (identity_hint != NULL) { s->psk_identity_hint = BUF_strdup(identity_hint); if (s->psk_identity_hint == NULL) { return 0; } } return 1; } const char *SSL_get_psk_identity_hint(const SSL *s) { if (s == NULL) { return NULL; } return s->psk_identity_hint; } const char *SSL_get_psk_identity(const SSL *s) { if (s == NULL || s->session == NULL) { return NULL; } return s->session->psk_identity; } void SSL_set_psk_client_callback( SSL *s, unsigned int (*cb)(SSL *ssl, const char *hint, char *identity, unsigned int max_identity_len, uint8_t *psk, unsigned int max_psk_len)) { s->psk_client_callback = cb; } void SSL_CTX_set_psk_client_callback( SSL_CTX *ctx, unsigned int (*cb)(SSL *ssl, const char *hint, char *identity, unsigned int max_identity_len, uint8_t *psk, unsigned int max_psk_len)) { ctx->psk_client_callback = cb; } void SSL_set_psk_server_callback( SSL *s, unsigned int (*cb)(SSL *ssl, const char *identity, uint8_t *psk, unsigned int max_psk_len)) { s->psk_server_callback = cb; } void SSL_CTX_set_psk_server_callback( SSL_CTX *ctx, unsigned int (*cb)(SSL *ssl, const char *identity, uint8_t *psk, unsigned int max_psk_len)) { ctx->psk_server_callback = cb; } void SSL_CTX_set_min_version(SSL_CTX *ctx, uint16_t version) { ctx->min_version = version; } void SSL_CTX_set_max_version(SSL_CTX *ctx, uint16_t version) { ctx->max_version = version; } void SSL_set_min_version(SSL *ssl, uint16_t version) { ssl->min_version = version; } void SSL_set_max_version(SSL *ssl, uint16_t version) { ssl->max_version = version; } void SSL_CTX_set_msg_callback(SSL_CTX *ctx, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) { SSL_CTX_callback_ctrl(ctx, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); } void SSL_set_msg_callback(SSL *ssl, void (*cb)(int write_p, int version, int content_type, const void *buf, size_t len, SSL *ssl, void *arg)) { SSL_callback_ctrl(ssl, SSL_CTRL_SET_MSG_CALLBACK, (void (*)(void))cb); } void SSL_CTX_set_keylog_bio(SSL_CTX *ctx, BIO *keylog_bio) { if (ctx->keylog_bio != NULL) { BIO_free(ctx->keylog_bio); } ctx->keylog_bio = keylog_bio; } static int cbb_add_hex(CBB *cbb, const uint8_t *in, size_t in_len) { static const char hextable[] = "0123456789abcdef"; uint8_t *out; size_t i; if (!CBB_add_space(cbb, &out, in_len * 2)) { return 0; } for (i = 0; i < in_len; i++) { *(out++) = (uint8_t)hextable[in[i] >> 4]; *(out++) = (uint8_t)hextable[in[i] & 0xf]; } return 1; } int ssl_ctx_log_rsa_client_key_exchange(SSL_CTX *ctx, const uint8_t *encrypted_premaster, size_t encrypted_premaster_len, const uint8_t *premaster, size_t premaster_len) { BIO *bio = ctx->keylog_bio; CBB cbb; uint8_t *out; size_t out_len; int ret; if (bio == NULL) { return 1; } if (encrypted_premaster_len < 8) { OPENSSL_PUT_ERROR(SSL, ssl_ctx_log_rsa_client_key_exchange, ERR_R_INTERNAL_ERROR); return 0; } if (!CBB_init(&cbb, 4 + 16 + 1 + premaster_len * 2 + 1)) { return 0; } if (!CBB_add_bytes(&cbb, (const uint8_t *)"RSA ", 4) || /* Only the first 8 bytes of the encrypted premaster secret are * logged. */ !cbb_add_hex(&cbb, encrypted_premaster, 8) || !CBB_add_bytes(&cbb, (const uint8_t *)" ", 1) || !cbb_add_hex(&cbb, premaster, premaster_len) || !CBB_add_bytes(&cbb, (const uint8_t *)"\n", 1) || !CBB_finish(&cbb, &out, &out_len)) { CBB_cleanup(&cbb); return 0; } CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); ret = BIO_write(bio, out, out_len) >= 0 && BIO_flush(bio); CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); OPENSSL_free(out); return ret; } int ssl_ctx_log_master_secret(SSL_CTX *ctx, const uint8_t *client_random, size_t client_random_len, const uint8_t *master, size_t master_len) { BIO *bio = ctx->keylog_bio; CBB cbb; uint8_t *out; size_t out_len; int ret; if (bio == NULL) { return 1; } if (client_random_len != 32) { OPENSSL_PUT_ERROR(SSL, ssl_ctx_log_master_secret, ERR_R_INTERNAL_ERROR); return 0; } if (!CBB_init(&cbb, 14 + 64 + 1 + master_len * 2 + 1)) { return 0; } if (!CBB_add_bytes(&cbb, (const uint8_t *)"CLIENT_RANDOM ", 14) || !cbb_add_hex(&cbb, client_random, 32) || !CBB_add_bytes(&cbb, (const uint8_t *)" ", 1) || !cbb_add_hex(&cbb, master, master_len) || !CBB_add_bytes(&cbb, (const uint8_t *)"\n", 1) || !CBB_finish(&cbb, &out, &out_len)) { CBB_cleanup(&cbb); return 0; } CRYPTO_w_lock(CRYPTO_LOCK_SSL_CTX); ret = BIO_write(bio, out, out_len) >= 0 && BIO_flush(bio); CRYPTO_w_unlock(CRYPTO_LOCK_SSL_CTX); OPENSSL_free(out); return ret; } int SSL_in_false_start(const SSL *s) { return s->s3->tmp.in_false_start; } int SSL_cutthrough_complete(const SSL *s) { return SSL_in_false_start(s); } void SSL_get_structure_sizes(size_t *ssl_size, size_t *ssl_ctx_size, size_t *ssl_session_size) { *ssl_size = sizeof(SSL); *ssl_ctx_size = sizeof(SSL_CTX); *ssl_session_size = sizeof(SSL_SESSION); } int ssl3_can_false_start(const SSL *s) { const SSL_CIPHER *const cipher = SSL_get_current_cipher(s); /* False Start only for TLS 1.2 with an ECDHE+AEAD cipher and ALPN or NPN. */ return !SSL_IS_DTLS(s) && SSL_version(s) >= TLS1_2_VERSION && (s->s3->alpn_selected || s->s3->next_proto_neg_seen) && cipher != NULL && cipher->algorithm_mkey == SSL_kECDHE && (cipher->algorithm_enc == SSL_AES128GCM || cipher->algorithm_enc == SSL_AES256GCM || cipher->algorithm_enc == SSL_CHACHA20POLY1305); } const SSL3_ENC_METHOD *ssl3_get_enc_method(uint16_t version) { switch (version) { case SSL3_VERSION: return &SSLv3_enc_data; case TLS1_VERSION: return &TLSv1_enc_data; case DTLS1_VERSION: case TLS1_1_VERSION: return &TLSv1_1_enc_data; case DTLS1_2_VERSION: case TLS1_2_VERSION: return &TLSv1_2_enc_data; default: return NULL; } } uint16_t ssl3_get_max_server_version(const SSL *s) { uint16_t max_version; if (SSL_IS_DTLS(s)) { max_version = (s->max_version != 0) ? s->max_version : DTLS1_2_VERSION; if (!(s->options & SSL_OP_NO_DTLSv1_2) && DTLS1_2_VERSION >= max_version) { return DTLS1_2_VERSION; } if (!(s->options & SSL_OP_NO_DTLSv1) && DTLS1_VERSION >= max_version) { return DTLS1_VERSION; } return 0; } max_version = (s->max_version != 0) ? s->max_version : TLS1_2_VERSION; if (!(s->options & SSL_OP_NO_TLSv1_2) && TLS1_2_VERSION <= max_version) { return TLS1_2_VERSION; } if (!(s->options & SSL_OP_NO_TLSv1_1) && TLS1_1_VERSION <= max_version) { return TLS1_1_VERSION; } if (!(s->options & SSL_OP_NO_TLSv1) && TLS1_VERSION <= max_version) { return TLS1_VERSION; } if (!(s->options & SSL_OP_NO_SSLv3) && SSL3_VERSION <= max_version) { return SSL3_VERSION; } return 0; } uint16_t ssl3_get_mutual_version(SSL *s, uint16_t client_version) { uint16_t version = 0; if (SSL_IS_DTLS(s)) { /* Clamp client_version to max_version. */ if (s->max_version != 0 && client_version < s->max_version) { client_version = s->max_version; } if (client_version <= DTLS1_2_VERSION && !(s->options & SSL_OP_NO_DTLSv1_2)) { version = DTLS1_2_VERSION; } else if (client_version <= DTLS1_VERSION && !(s->options & SSL_OP_NO_DTLSv1)) { version = DTLS1_VERSION; } /* Check against min_version. */ if (version != 0 && s->min_version != 0 && version > s->min_version) { return 0; } return version; } else { /* Clamp client_version to max_version. */ if (s->max_version != 0 && client_version > s->max_version) { client_version = s->max_version; } if (client_version >= TLS1_2_VERSION && !(s->options & SSL_OP_NO_TLSv1_2)) { version = TLS1_2_VERSION; } else if (client_version >= TLS1_1_VERSION && !(s->options & SSL_OP_NO_TLSv1_1)) { version = TLS1_1_VERSION; } else if (client_version >= TLS1_VERSION && !(s->options & SSL_OP_NO_TLSv1)) { version = TLS1_VERSION; } else if (client_version >= SSL3_VERSION && !(s->options & SSL_OP_NO_SSLv3)) { version = SSL3_VERSION; } /* Check against min_version. */ if (version != 0 && s->min_version != 0 && version < s->min_version) { return 0; } return version; } } uint16_t ssl3_get_max_client_version(SSL *s) { unsigned long options = s->options; uint16_t version = 0; /* OpenSSL's API for controlling versions entails blacklisting individual * protocols. This has two problems. First, on the client, the protocol can * only express a contiguous range of versions. Second, a library consumer * trying to set a maximum version cannot disable protocol versions that get * added in a future version of the library. * * To account for both of these, OpenSSL interprets the client-side bitmask * as a min/max range by picking the lowest contiguous non-empty range of * enabled protocols. Note that this means it is impossible to set a maximum * version of TLS 1.2 in a future-proof way. * * By this scheme, the maximum version is the lowest version V such that V is * enabled and V+1 is disabled or unimplemented. */ if (SSL_IS_DTLS(s)) { if (!(options & SSL_OP_NO_DTLSv1_2)) { version = DTLS1_2_VERSION; } if (!(options & SSL_OP_NO_DTLSv1) && (options & SSL_OP_NO_DTLSv1_2)) { version = DTLS1_VERSION; } if (s->max_version != 0 && version < s->max_version) { version = s->max_version; } } else { if (!(options & SSL_OP_NO_TLSv1_2)) { version = TLS1_2_VERSION; } if (!(options & SSL_OP_NO_TLSv1_1) && (options & SSL_OP_NO_TLSv1_2)) { version = TLS1_1_VERSION; } if (!(options & SSL_OP_NO_TLSv1) && (options & SSL_OP_NO_TLSv1_1)) { version = TLS1_VERSION; } if (!(options & SSL_OP_NO_SSLv3) && (options & SSL_OP_NO_TLSv1)) { version = SSL3_VERSION; } if (s->max_version != 0 && version > s->max_version) { version = s->max_version; } } return version; } int ssl3_is_version_enabled(SSL *s, uint16_t version) { if (SSL_IS_DTLS(s)) { if (s->max_version != 0 && version < s->max_version) { return 0; } if (s->min_version != 0 && version > s->min_version) { return 0; } switch (version) { case DTLS1_VERSION: return !(s->options & SSL_OP_NO_DTLSv1); case DTLS1_2_VERSION: return !(s->options & SSL_OP_NO_DTLSv1_2); default: return 0; } } else { if (s->max_version != 0 && version > s->max_version) { return 0; } if (s->min_version != 0 && version < s->min_version) { return 0; } switch (version) { case SSL3_VERSION: return !(s->options & SSL_OP_NO_SSLv3); case TLS1_VERSION: return !(s->options & SSL_OP_NO_TLSv1); case TLS1_1_VERSION: return !(s->options & SSL_OP_NO_TLSv1_1); case TLS1_2_VERSION: return !(s->options & SSL_OP_NO_TLSv1_2); default: return 0; } } } uint16_t ssl3_version_from_wire(SSL *s, uint16_t wire_version) { if (!SSL_IS_DTLS(s)) { return wire_version; } uint16_t tls_version = ~wire_version; uint16_t version = tls_version + 0x0201; /* If either component overflowed, clamp it so comparisons still work. */ if ((version >> 8) < (tls_version >> 8)) { version = 0xff00 | (version & 0xff); } if ((version & 0xff) < (tls_version & 0xff)) { version = (version & 0xff00) | 0xff; } /* DTLS 1.0 maps to TLS 1.1, not TLS 1.0. */ if (version == TLS1_VERSION) { version = TLS1_1_VERSION; } return version; } int SSL_cache_hit(SSL *s) { return s->hit; } int SSL_is_server(SSL *s) { return s->server; } void SSL_CTX_set_dos_protection_cb( SSL_CTX *ctx, int (*cb)(const struct ssl_early_callback_ctx *)) { ctx->dos_protection_cb = cb; } void SSL_enable_fastradio_padding(SSL *s, char on_off) { s->fastradio_padding = on_off; } const SSL_CIPHER *SSL_get_cipher_by_value(uint16_t value) { return ssl3_get_cipher_by_value(value); } int SSL_get_rc4_state(const SSL *ssl, const RC4_KEY **read_key, const RC4_KEY **write_key) { if (ssl->aead_read_ctx == NULL || ssl->aead_write_ctx == NULL) { return 0; } return EVP_AEAD_CTX_get_rc4_state(&ssl->aead_read_ctx->ctx, read_key) && EVP_AEAD_CTX_get_rc4_state(&ssl->aead_write_ctx->ctx, write_key); }