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- /* crypto/pem/pem_info.c */
- /* 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.]
- */
-
- #include <openssl/pem.h>
-
- #include <assert.h>
- #include <stdio.h>
- #include <string.h>
-
- #include <openssl/buf.h>
- #include <openssl/dsa.h>
- #include <openssl/err.h>
- #include <openssl/evp.h>
- #include <openssl/mem.h>
- #include <openssl/obj.h>
- #include <openssl/rsa.h>
- #include <openssl/x509.h>
-
- #ifndef OPENSSL_NO_FP_API
- STACK_OF(X509_INFO) *PEM_X509_INFO_read(FILE *fp, STACK_OF(X509_INFO) *sk,
- pem_password_cb *cb, void *u)
- {
- BIO *b = BIO_new_fp(fp, BIO_NOCLOSE);
- if (b == NULL) {
- OPENSSL_PUT_ERROR(PEM, ERR_R_BUF_LIB);
- return 0;
- }
- STACK_OF(X509_INFO) *ret = PEM_X509_INFO_read_bio(b, sk, cb, u);
- BIO_free(b);
- return ret;
- }
- #endif
-
- enum parse_result_t {
- parse_ok,
- parse_error,
- parse_new_entry,
- };
-
- static enum parse_result_t parse_x509(X509_INFO *info, const uint8_t *data,
- size_t len, int key_type)
- {
- if (info->x509 != NULL) {
- return parse_new_entry;
- }
- info->x509 = d2i_X509(NULL, &data, len);
- return info->x509 != NULL ? parse_ok : parse_error;
- }
-
- static enum parse_result_t parse_x509_aux(X509_INFO *info, const uint8_t *data,
- size_t len, int key_type)
- {
- if (info->x509 != NULL) {
- return parse_new_entry;
- }
- info->x509 = d2i_X509_AUX(NULL, &data, len);
- return info->x509 != NULL ? parse_ok : parse_error;
- }
-
- static enum parse_result_t parse_crl(X509_INFO *info, const uint8_t *data,
- size_t len, int key_type)
- {
- if (info->crl != NULL) {
- return parse_new_entry;
- }
- info->crl = d2i_X509_CRL(NULL, &data, len);
- return info->crl != NULL ? parse_ok : parse_error;
- }
-
- static enum parse_result_t parse_key(X509_INFO *info, const uint8_t *data,
- size_t len, int key_type)
- {
- if (info->x_pkey != NULL) {
- return parse_new_entry;
- }
- info->x_pkey = X509_PKEY_new();
- if (info->x_pkey == NULL) {
- return parse_error;
- }
- info->x_pkey->dec_pkey = d2i_PrivateKey(key_type, NULL, &data, len);
- return info->x_pkey->dec_pkey != NULL ? parse_ok : parse_error;
- }
-
- STACK_OF(X509_INFO) *PEM_X509_INFO_read_bio(BIO *bp, STACK_OF(X509_INFO) *sk,
- pem_password_cb *cb, void *u)
- {
- X509_INFO *info = NULL;
- char *name = NULL, *header = NULL;
- unsigned char *data = NULL;
- long len;
- int ok = 0;
- STACK_OF(X509_INFO) *ret = NULL;
-
- if (sk == NULL) {
- ret = sk_X509_INFO_new_null();
- if (ret == NULL) {
- OPENSSL_PUT_ERROR(PEM, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- } else {
- ret = sk;
- }
- size_t orig_num = sk_X509_INFO_num(ret);
-
- info = X509_INFO_new();
- if (info == NULL) {
- goto err;
- }
-
- for (;;) {
- if (!PEM_read_bio(bp, &name, &header, &data, &len)) {
- uint32_t error = ERR_peek_last_error();
- if (ERR_GET_LIB(error) == ERR_LIB_PEM &&
- ERR_GET_REASON(error) == PEM_R_NO_START_LINE) {
- ERR_clear_error();
- break;
- }
- goto err;
- }
-
- enum parse_result_t (*parse_function)(X509_INFO *, const uint8_t *,
- size_t, int) = NULL;
- int key_type = EVP_PKEY_NONE;
- if (strcmp(name, PEM_STRING_X509) == 0 ||
- strcmp(name, PEM_STRING_X509_OLD) == 0) {
- parse_function = parse_x509;
- } else if (strcmp(name, PEM_STRING_X509_TRUSTED) == 0) {
- parse_function = parse_x509_aux;
- } else if (strcmp(name, PEM_STRING_X509_CRL) == 0) {
- parse_function = parse_crl;
- } else if (strcmp(name, PEM_STRING_RSA) == 0) {
- parse_function = parse_key;
- key_type = EVP_PKEY_RSA;
- } else if (strcmp(name, PEM_STRING_DSA) == 0) {
- parse_function = parse_key;
- key_type = EVP_PKEY_DSA;
- } else if (strcmp(name, PEM_STRING_ECPRIVATEKEY) == 0) {
- parse_function = parse_key;
- key_type = EVP_PKEY_EC;
- }
-
- /* If a private key has a header, assume it is encrypted. */
- if (key_type != EVP_PKEY_NONE && strlen(header) > 10) {
- if (info->x_pkey != NULL) {
- if (!sk_X509_INFO_push(ret, info)) {
- goto err;
- }
- info = X509_INFO_new();
- if (info == NULL) {
- goto err;
- }
- }
- /* Historically, raw entries pushed an empty key. */
- info->x_pkey = X509_PKEY_new();
- if (info->x_pkey == NULL ||
- !PEM_get_EVP_CIPHER_INFO(header, &info->enc_cipher)) {
- goto err;
- }
- info->enc_data = (char *)data;
- info->enc_len = (int)len;
- data = NULL;
- } else if (parse_function != NULL) {
- EVP_CIPHER_INFO cipher;
- if (!PEM_get_EVP_CIPHER_INFO(header, &cipher) ||
- !PEM_do_header(&cipher, data, &len, cb, u)) {
- goto err;
- }
- enum parse_result_t result =
- parse_function(info, data, len, key_type);
- if (result == parse_new_entry) {
- if (!sk_X509_INFO_push(ret, info)) {
- goto err;
- }
- info = X509_INFO_new();
- if (info == NULL) {
- goto err;
- }
- result = parse_function(info, data, len, key_type);
- }
- if (result != parse_ok) {
- OPENSSL_PUT_ERROR(PEM, ERR_R_ASN1_LIB);
- goto err;
- }
- }
- OPENSSL_free(name);
- OPENSSL_free(header);
- OPENSSL_free(data);
- name = NULL;
- header = NULL;
- data = NULL;
- }
-
- /* Push the last entry on the stack if not empty. */
- if (info->x509 != NULL || info->crl != NULL ||
- info->x_pkey != NULL || info->enc_data != NULL) {
- if (!sk_X509_INFO_push(ret, info)) {
- goto err;
- }
- info = NULL;
- }
-
- ok = 1;
-
- err:
- X509_INFO_free(info);
- if (!ok) {
- while (sk_X509_INFO_num(ret) > orig_num) {
- X509_INFO_free(sk_X509_INFO_pop(ret));
- }
- if (ret != sk) {
- sk_X509_INFO_free(ret);
- }
- ret = NULL;
- }
-
- OPENSSL_free(name);
- OPENSSL_free(header);
- OPENSSL_free(data);
- return ret;
- }
-
- /* A TJH addition */
- int PEM_X509_INFO_write_bio(BIO *bp, X509_INFO *xi, EVP_CIPHER *enc,
- unsigned char *kstr, int klen,
- pem_password_cb *cb, void *u)
- {
- int i, ret = 0;
- unsigned char *data = NULL;
- const char *objstr = NULL;
- char buf[PEM_BUFSIZE];
- unsigned char *iv = NULL;
- unsigned iv_len = 0;
-
- if (enc != NULL) {
- iv_len = EVP_CIPHER_iv_length(enc);
- objstr = OBJ_nid2sn(EVP_CIPHER_nid(enc));
- if (objstr == NULL) {
- OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER);
- goto err;
- }
- }
-
- /*
- * now for the fun part ... if we have a private key then we have to be
- * able to handle a not-yet-decrypted key being written out correctly ...
- * if it is decrypted or it is non-encrypted then we use the base code
- */
- if (xi->x_pkey != NULL) {
- if ((xi->enc_data != NULL) && (xi->enc_len > 0)) {
- if (enc == NULL) {
- OPENSSL_PUT_ERROR(PEM, PEM_R_CIPHER_IS_NULL);
- goto err;
- }
-
- /* copy from weirdo names into more normal things */
- iv = xi->enc_cipher.iv;
- data = (unsigned char *)xi->enc_data;
- i = xi->enc_len;
-
- /*
- * we take the encryption data from the internal stuff rather
- * than what the user has passed us ... as we have to match
- * exactly for some strange reason
- */
- objstr = OBJ_nid2sn(EVP_CIPHER_nid(xi->enc_cipher.cipher));
- if (objstr == NULL) {
- OPENSSL_PUT_ERROR(PEM, PEM_R_UNSUPPORTED_CIPHER);
- goto err;
- }
-
- /* create the right magic header stuff */
- assert(strlen(objstr) + 23 + 2 * iv_len + 13 <= sizeof buf);
- buf[0] = '\0';
- PEM_proc_type(buf, PEM_TYPE_ENCRYPTED);
- PEM_dek_info(buf, objstr, iv_len, (char *)iv);
-
- /* use the normal code to write things out */
- i = PEM_write_bio(bp, PEM_STRING_RSA, buf, data, i);
- if (i <= 0)
- goto err;
- } else {
- /* Add DSA/DH */
- /* normal optionally encrypted stuff */
- if (PEM_write_bio_RSAPrivateKey(bp,
- xi->x_pkey->dec_pkey->pkey.rsa,
- enc, kstr, klen, cb, u) <= 0)
- goto err;
- }
- }
-
- /* if we have a certificate then write it out now */
- if ((xi->x509 != NULL) && (PEM_write_bio_X509(bp, xi->x509) <= 0))
- goto err;
-
- /*
- * we are ignoring anything else that is loaded into the X509_INFO
- * structure for the moment ... as I don't need it so I'm not coding it
- * here and Eric can do it when this makes it into the base library --tjh
- */
-
- ret = 1;
-
- err:
- OPENSSL_cleanse(buf, PEM_BUFSIZE);
- return ret;
- }
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