|
- /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
- * project 1999.
- */
- /* ====================================================================
- * Copyright (c) 1999 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
- * licensing@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). */
-
- #include <openssl/pkcs8.h>
-
- #include <assert.h>
- #include <limits.h>
- #include <string.h>
-
- #include <openssl/asn1.h>
- #include <openssl/bn.h>
- #include <openssl/buf.h>
- #include <openssl/cipher.h>
- #include <openssl/digest.h>
- #include <openssl/err.h>
- #include <openssl/hmac.h>
- #include <openssl/mem.h>
- #include <openssl/x509.h>
-
- #include "../bytestring/internal.h"
- #include "../evp/internal.h"
-
-
- #define PKCS12_KEY_ID 1
- #define PKCS12_IV_ID 2
- #define PKCS12_MAC_ID 3
-
- static int ascii_to_ucs2(const char *ascii, size_t ascii_len,
- uint8_t **out, size_t *out_len) {
- uint8_t *unitmp;
- size_t ulen, i;
-
- ulen = ascii_len * 2 + 2;
- if (ulen < ascii_len) {
- return 0;
- }
- unitmp = OPENSSL_malloc(ulen);
- if (unitmp == NULL) {
- return 0;
- }
- for (i = 0; i < ulen - 2; i += 2) {
- unitmp[i] = 0;
- unitmp[i + 1] = ascii[i >> 1];
- }
-
- /* Make result double null terminated */
- unitmp[ulen - 2] = 0;
- unitmp[ulen - 1] = 0;
- *out_len = ulen;
- *out = unitmp;
- return 1;
- }
-
- static int pkcs12_key_gen_raw(const uint8_t *pass_raw, size_t pass_raw_len,
- const uint8_t *salt, size_t salt_len,
- int id, int iterations,
- size_t out_len, uint8_t *out,
- const EVP_MD *md_type) {
- uint8_t *B, *D, *I, *p, *Ai;
- int Slen, Plen, Ilen, Ijlen;
- int i, j, v;
- size_t u;
- int ret = 0;
- BIGNUM *Ij, *Bpl1; /* These hold Ij and B + 1 */
- EVP_MD_CTX ctx;
-
- EVP_MD_CTX_init(&ctx);
- v = EVP_MD_block_size(md_type);
- u = EVP_MD_size(md_type);
- D = OPENSSL_malloc(v);
- Ai = OPENSSL_malloc(u);
- B = OPENSSL_malloc(v + 1);
- Slen = v * ((salt_len + v - 1) / v);
- if (pass_raw_len) {
- Plen = v * ((pass_raw_len + v - 1) / v);
- } else {
- Plen = 0;
- }
- Ilen = Slen + Plen;
- I = OPENSSL_malloc(Ilen);
- Ij = BN_new();
- Bpl1 = BN_new();
- if (!D || !Ai || !B || !I || !Ij || !Bpl1) {
- goto err;
- }
- for (i = 0; i < v; i++) {
- D[i] = id;
- }
- p = I;
- for (i = 0; i < Slen; i++) {
- *p++ = salt[i % salt_len];
- }
- for (i = 0; i < Plen; i++) {
- *p++ = pass_raw[i % pass_raw_len];
- }
- for (;;) {
- if (!EVP_DigestInit_ex(&ctx, md_type, NULL) ||
- !EVP_DigestUpdate(&ctx, D, v) ||
- !EVP_DigestUpdate(&ctx, I, Ilen) ||
- !EVP_DigestFinal_ex(&ctx, Ai, NULL)) {
- goto err;
- }
- for (j = 1; j < iterations; j++) {
- if (!EVP_DigestInit_ex(&ctx, md_type, NULL) ||
- !EVP_DigestUpdate(&ctx, Ai, u) ||
- !EVP_DigestFinal_ex(&ctx, Ai, NULL)) {
- goto err;
- }
- }
- memcpy(out, Ai, out_len < u ? out_len : u);
- if (u >= out_len) {
- ret = 1;
- goto end;
- }
- out_len -= u;
- out += u;
- for (j = 0; j < v; j++) {
- B[j] = Ai[j % u];
- }
- /* Work out B + 1 first then can use B as tmp space */
- if (!BN_bin2bn(B, v, Bpl1) ||
- !BN_add_word(Bpl1, 1)) {
- goto err;
- }
- for (j = 0; j < Ilen; j += v) {
- if (!BN_bin2bn(I + j, v, Ij) ||
- !BN_add(Ij, Ij, Bpl1) ||
- !BN_bn2bin(Ij, B)) {
- goto err;
- }
- Ijlen = BN_num_bytes(Ij);
- /* If more than 2^(v*8) - 1 cut off MSB */
- if (Ijlen > v) {
- if (!BN_bn2bin(Ij, B)) {
- goto err;
- }
- memcpy(I + j, B + 1, v);
- /* If less than v bytes pad with zeroes */
- } else if (Ijlen < v) {
- memset(I + j, 0, v - Ijlen);
- if (!BN_bn2bin(Ij, I + j + v - Ijlen)) {
- goto err;
- }
- } else if (!BN_bn2bin(Ij, I + j)) {
- goto err;
- }
- }
- }
-
- err:
- OPENSSL_PUT_ERROR(PKCS8, ERR_R_MALLOC_FAILURE);
-
- end:
- OPENSSL_free(Ai);
- OPENSSL_free(B);
- OPENSSL_free(D);
- OPENSSL_free(I);
- BN_free(Ij);
- BN_free(Bpl1);
- EVP_MD_CTX_cleanup(&ctx);
-
- return ret;
- }
-
- static int pkcs12_pbe_keyivgen(EVP_CIPHER_CTX *ctx, const uint8_t *pass_raw,
- size_t pass_raw_len, ASN1_TYPE *param,
- const EVP_CIPHER *cipher, const EVP_MD *md,
- int is_encrypt) {
- PBEPARAM *pbe;
- int salt_len, iterations, ret;
- uint8_t *salt;
- const uint8_t *pbuf;
- uint8_t key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
-
- /* Extract useful info from parameter */
- if (param == NULL || param->type != V_ASN1_SEQUENCE ||
- param->value.sequence == NULL) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_DECODE_ERROR);
- return 0;
- }
-
- pbuf = param->value.sequence->data;
- pbe = d2i_PBEPARAM(NULL, &pbuf, param->value.sequence->length);
- if (pbe == NULL) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_DECODE_ERROR);
- return 0;
- }
-
- if (!pbe->iter) {
- iterations = 1;
- } else {
- iterations = ASN1_INTEGER_get(pbe->iter);
- }
- salt = pbe->salt->data;
- salt_len = pbe->salt->length;
- if (!pkcs12_key_gen_raw(pass_raw, pass_raw_len, salt, salt_len, PKCS12_KEY_ID,
- iterations, EVP_CIPHER_key_length(cipher), key, md)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_KEY_GEN_ERROR);
- PBEPARAM_free(pbe);
- return 0;
- }
- if (!pkcs12_key_gen_raw(pass_raw, pass_raw_len, salt, salt_len, PKCS12_IV_ID,
- iterations, EVP_CIPHER_iv_length(cipher), iv, md)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_KEY_GEN_ERROR);
- PBEPARAM_free(pbe);
- return 0;
- }
- PBEPARAM_free(pbe);
- ret = EVP_CipherInit_ex(ctx, cipher, NULL, key, iv, is_encrypt);
- OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
- OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
- return ret;
- }
-
- typedef int (*keygen_func)(EVP_CIPHER_CTX *ctx, const uint8_t *pass_raw,
- size_t pass_raw_len, ASN1_TYPE *param,
- const EVP_CIPHER *cipher, const EVP_MD *md,
- int is_encrypt);
-
- struct pbe_suite {
- int pbe_nid;
- const EVP_CIPHER* (*cipher_func)(void);
- const EVP_MD* (*md_func)(void);
- keygen_func keygen;
- };
-
- static const struct pbe_suite kBuiltinPBE[] = {
- {
- NID_pbe_WithSHA1And40BitRC2_CBC, EVP_rc2_40_cbc, EVP_sha1, pkcs12_pbe_keyivgen,
- },
- {
- NID_pbe_WithSHA1And128BitRC4, EVP_rc4, EVP_sha1, pkcs12_pbe_keyivgen,
- },
- {
- NID_pbe_WithSHA1And3_Key_TripleDES_CBC, EVP_des_ede3_cbc, EVP_sha1,
- pkcs12_pbe_keyivgen,
- },
- };
-
- static int pbe_cipher_init(ASN1_OBJECT *pbe_obj,
- const uint8_t *pass_raw, size_t pass_raw_len,
- ASN1_TYPE *param,
- EVP_CIPHER_CTX *ctx, int is_encrypt) {
- const EVP_CIPHER *cipher;
- const EVP_MD *md;
- unsigned i;
-
- const struct pbe_suite *suite = NULL;
- const int pbe_nid = OBJ_obj2nid(pbe_obj);
-
- for (i = 0; i < sizeof(kBuiltinPBE) / sizeof(struct pbe_suite); i++) {
- if (kBuiltinPBE[i].pbe_nid == pbe_nid) {
- suite = &kBuiltinPBE[i];
- break;
- }
- }
-
- if (suite == NULL) {
- char obj_str[80];
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_UNKNOWN_ALGORITHM);
- if (!pbe_obj) {
- strncpy(obj_str, "NULL", sizeof(obj_str));
- } else {
- i2t_ASN1_OBJECT(obj_str, sizeof(obj_str), pbe_obj);
- }
- ERR_add_error_data(2, "TYPE=", obj_str);
- return 0;
- }
-
- if (suite->cipher_func == NULL) {
- cipher = NULL;
- } else {
- cipher = suite->cipher_func();
- if (!cipher) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_UNKNOWN_CIPHER);
- return 0;
- }
- }
-
- if (suite->md_func == NULL) {
- md = NULL;
- } else {
- md = suite->md_func();
- if (!md) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_UNKNOWN_DIGEST);
- return 0;
- }
- }
-
- if (!suite->keygen(ctx, pass_raw, pass_raw_len, param, cipher, md,
- is_encrypt)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_KEYGEN_FAILURE);
- return 0;
- }
-
- return 1;
- }
-
- static int pbe_crypt(const X509_ALGOR *algor,
- const uint8_t *pass_raw, size_t pass_raw_len,
- const uint8_t *in, size_t in_len,
- uint8_t **out, size_t *out_len,
- int is_encrypt) {
- uint8_t *buf;
- int n, ret = 0;
- EVP_CIPHER_CTX ctx;
- unsigned block_size;
-
- EVP_CIPHER_CTX_init(&ctx);
-
- if (!pbe_cipher_init(algor->algorithm, pass_raw, pass_raw_len,
- algor->parameter, &ctx, is_encrypt)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_UNKNOWN_CIPHER_ALGORITHM);
- return 0;
- }
- block_size = EVP_CIPHER_CTX_block_size(&ctx);
-
- if (in_len + block_size < in_len) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_TOO_LONG);
- goto err;
- }
-
- buf = OPENSSL_malloc(in_len + block_size);
- if (buf == NULL) {
- OPENSSL_PUT_ERROR(PKCS8, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- if (!EVP_CipherUpdate(&ctx, buf, &n, in, in_len)) {
- OPENSSL_free(buf);
- OPENSSL_PUT_ERROR(PKCS8, ERR_R_EVP_LIB);
- goto err;
- }
- *out_len = n;
-
- if (!EVP_CipherFinal_ex(&ctx, buf + n, &n)) {
- OPENSSL_free(buf);
- OPENSSL_PUT_ERROR(PKCS8, ERR_R_EVP_LIB);
- goto err;
- }
- *out_len += n;
- *out = buf;
- ret = 1;
-
- err:
- EVP_CIPHER_CTX_cleanup(&ctx);
- return ret;
- }
-
- static void *pkcs12_item_decrypt_d2i(X509_ALGOR *algor, const ASN1_ITEM *it,
- const uint8_t *pass_raw,
- size_t pass_raw_len,
- ASN1_OCTET_STRING *oct) {
- uint8_t *out;
- const uint8_t *p;
- void *ret;
- size_t out_len;
-
- if (!pbe_crypt(algor, pass_raw, pass_raw_len, oct->data, oct->length,
- &out, &out_len, 0 /* decrypt */)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_CRYPT_ERROR);
- return NULL;
- }
- p = out;
- ret = ASN1_item_d2i(NULL, &p, out_len, it);
- OPENSSL_cleanse(out, out_len);
- if (!ret) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_DECODE_ERROR);
- }
- OPENSSL_free(out);
- return ret;
- }
-
- PKCS8_PRIV_KEY_INFO *PKCS8_decrypt(X509_SIG *pkcs8, const char *pass,
- int pass_len) {
- uint8_t *pass_raw = NULL;
- size_t pass_raw_len = 0;
- PKCS8_PRIV_KEY_INFO *ret;
-
- if (pass) {
- if (pass_len == -1) {
- pass_len = strlen(pass);
- }
- if (!ascii_to_ucs2(pass, pass_len, &pass_raw, &pass_raw_len)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_DECODE_ERROR);
- return NULL;
- }
- }
-
- ret = PKCS8_decrypt_pbe(pkcs8, pass_raw, pass_raw_len);
-
- if (pass_raw) {
- OPENSSL_cleanse(pass_raw, pass_raw_len);
- OPENSSL_free(pass_raw);
- }
- return ret;
- }
-
- PKCS8_PRIV_KEY_INFO *PKCS8_decrypt_pbe(X509_SIG *pkcs8, const uint8_t *pass_raw,
- size_t pass_raw_len) {
- return pkcs12_item_decrypt_d2i(pkcs8->algor,
- ASN1_ITEM_rptr(PKCS8_PRIV_KEY_INFO), pass_raw,
- pass_raw_len, pkcs8->digest);
- }
-
- static ASN1_OCTET_STRING *pkcs12_item_i2d_encrypt(X509_ALGOR *algor,
- const ASN1_ITEM *it,
- const uint8_t *pass_raw,
- size_t pass_raw_len, void *obj) {
- ASN1_OCTET_STRING *oct;
- uint8_t *in = NULL;
- int in_len;
- size_t crypt_len;
-
- oct = M_ASN1_OCTET_STRING_new();
- if (oct == NULL) {
- OPENSSL_PUT_ERROR(PKCS8, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- in_len = ASN1_item_i2d(obj, &in, it);
- if (!in) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_ENCODE_ERROR);
- return NULL;
- }
- if (!pbe_crypt(algor, pass_raw, pass_raw_len, in, in_len, &oct->data, &crypt_len,
- 1 /* encrypt */)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_ENCRYPT_ERROR);
- OPENSSL_free(in);
- return NULL;
- }
- oct->length = crypt_len;
- OPENSSL_cleanse(in, in_len);
- OPENSSL_free(in);
- return oct;
- }
-
- X509_SIG *PKCS8_encrypt(int pbe_nid, const EVP_CIPHER *cipher, const char *pass,
- int pass_len, uint8_t *salt, size_t salt_len,
- int iterations, PKCS8_PRIV_KEY_INFO *p8inf) {
- uint8_t *pass_raw = NULL;
- size_t pass_raw_len = 0;
- X509_SIG *ret;
-
- if (pass) {
- if (pass_len == -1) {
- pass_len = strlen(pass);
- }
- if (!ascii_to_ucs2(pass, pass_len, &pass_raw, &pass_raw_len)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_DECODE_ERROR);
- return NULL;
- }
- }
-
- ret = PKCS8_encrypt_pbe(pbe_nid, pass_raw, pass_raw_len,
- salt, salt_len, iterations, p8inf);
-
- if (pass_raw) {
- OPENSSL_cleanse(pass_raw, pass_raw_len);
- OPENSSL_free(pass_raw);
- }
- return ret;
- }
-
- X509_SIG *PKCS8_encrypt_pbe(int pbe_nid,
- const uint8_t *pass_raw, size_t pass_raw_len,
- uint8_t *salt, size_t salt_len,
- int iterations, PKCS8_PRIV_KEY_INFO *p8inf) {
- X509_SIG *pkcs8 = NULL;
- X509_ALGOR *pbe;
-
- pkcs8 = X509_SIG_new();
- if (pkcs8 == NULL) {
- OPENSSL_PUT_ERROR(PKCS8, ERR_R_MALLOC_FAILURE);
- goto err;
- }
-
- pbe = PKCS5_pbe_set(pbe_nid, iterations, salt, salt_len);
- if (!pbe) {
- OPENSSL_PUT_ERROR(PKCS8, ERR_R_ASN1_LIB);
- goto err;
- }
-
- X509_ALGOR_free(pkcs8->algor);
- pkcs8->algor = pbe;
- M_ASN1_OCTET_STRING_free(pkcs8->digest);
- pkcs8->digest = pkcs12_item_i2d_encrypt(
- pbe, ASN1_ITEM_rptr(PKCS8_PRIV_KEY_INFO), pass_raw, pass_raw_len, p8inf);
- if (!pkcs8->digest) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_ENCRYPT_ERROR);
- goto err;
- }
-
- return pkcs8;
-
- err:
- X509_SIG_free(pkcs8);
- return NULL;
- }
-
- EVP_PKEY *EVP_PKCS82PKEY(PKCS8_PRIV_KEY_INFO *p8) {
- EVP_PKEY *pkey = NULL;
- ASN1_OBJECT *algoid;
- char obj_tmp[80];
-
- if (!PKCS8_pkey_get0(&algoid, NULL, NULL, NULL, p8)) {
- return NULL;
- }
-
- pkey = EVP_PKEY_new();
- if (pkey == NULL) {
- OPENSSL_PUT_ERROR(PKCS8, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
-
- if (!EVP_PKEY_set_type(pkey, OBJ_obj2nid(algoid))) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
- i2t_ASN1_OBJECT(obj_tmp, 80, algoid);
- ERR_add_error_data(2, "TYPE=", obj_tmp);
- goto error;
- }
-
- if (pkey->ameth->priv_decode) {
- if (!pkey->ameth->priv_decode(pkey, p8)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_PRIVATE_KEY_DECODE_ERROR);
- goto error;
- }
- } else {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_METHOD_NOT_SUPPORTED);
- goto error;
- }
-
- return pkey;
-
- error:
- EVP_PKEY_free(pkey);
- return NULL;
- }
-
- PKCS8_PRIV_KEY_INFO *EVP_PKEY2PKCS8(EVP_PKEY *pkey) {
- PKCS8_PRIV_KEY_INFO *p8;
-
- p8 = PKCS8_PRIV_KEY_INFO_new();
- if (p8 == NULL) {
- OPENSSL_PUT_ERROR(PKCS8, ERR_R_MALLOC_FAILURE);
- return NULL;
- }
- p8->broken = PKCS8_OK;
-
- if (pkey->ameth) {
- if (pkey->ameth->priv_encode) {
- if (!pkey->ameth->priv_encode(p8, pkey)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_PRIVATE_KEY_ENCODE_ERROR);
- goto error;
- }
- } else {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_METHOD_NOT_SUPPORTED);
- goto error;
- }
- } else {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_UNSUPPORTED_PRIVATE_KEY_ALGORITHM);
- goto error;
- }
- return p8;
-
- error:
- PKCS8_PRIV_KEY_INFO_free(p8);
- return NULL;
- }
-
- struct pkcs12_context {
- EVP_PKEY **out_key;
- STACK_OF(X509) *out_certs;
- uint8_t *password;
- size_t password_len;
- };
-
- static int PKCS12_handle_content_info(CBS *content_info, unsigned depth,
- struct pkcs12_context *ctx);
-
- /* PKCS12_handle_content_infos parses a series of PKCS#7 ContentInfos in a
- * SEQUENCE. */
- static int PKCS12_handle_content_infos(CBS *content_infos,
- unsigned depth,
- struct pkcs12_context *ctx) {
- uint8_t *der_bytes = NULL;
- size_t der_len;
- CBS in;
- int ret = 0;
-
- /* Generally we only expect depths 0 (the top level, with a
- * pkcs7-encryptedData and a pkcs7-data) and depth 1 (the various PKCS#12
- * bags). */
- if (depth > 3) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_PKCS12_TOO_DEEPLY_NESTED);
- return 0;
- }
-
- /* Although a BER->DER conversion is done at the beginning of |PKCS12_parse|,
- * the ASN.1 data gets wrapped in OCTETSTRINGs and/or encrypted and the
- * conversion cannot see through those wrappings. So each time we step
- * through one we need to convert to DER again. */
- if (!CBS_asn1_ber_to_der(content_infos, &der_bytes, &der_len)) {
- return 0;
- }
-
- if (der_bytes != NULL) {
- CBS_init(&in, der_bytes, der_len);
- } else {
- CBS_init(&in, CBS_data(content_infos), CBS_len(content_infos));
- }
-
- if (!CBS_get_asn1(&in, &in, CBS_ASN1_SEQUENCE)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- while (CBS_len(&in) > 0) {
- CBS content_info;
- if (!CBS_get_asn1(&in, &content_info, CBS_ASN1_SEQUENCE)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- if (!PKCS12_handle_content_info(&content_info, depth + 1, ctx)) {
- goto err;
- }
- }
-
- /* NSS includes additional data after the SEQUENCE, but it's an (unwrapped)
- * copy of the same encrypted private key (with the same IV and
- * ciphertext)! */
-
- ret = 1;
-
- err:
- OPENSSL_free(der_bytes);
- return ret;
- }
-
- /* PKCS12_handle_content_info parses a single PKCS#7 ContentInfo element in a
- * PKCS#12 structure. */
- static int PKCS12_handle_content_info(CBS *content_info, unsigned depth,
- struct pkcs12_context *ctx) {
- CBS content_type, wrapped_contents, contents, content_infos;
- int nid, ret = 0;
-
- if (!CBS_get_asn1(content_info, &content_type, CBS_ASN1_OBJECT) ||
- !CBS_get_asn1(content_info, &wrapped_contents,
- CBS_ASN1_CONTEXT_SPECIFIC | CBS_ASN1_CONSTRUCTED | 0)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- nid = OBJ_cbs2nid(&content_type);
- if (nid == NID_pkcs7_encrypted) {
- /* See https://tools.ietf.org/html/rfc2315#section-13.
- *
- * PKCS#7 encrypted data inside a PKCS#12 structure is generally an
- * encrypted certificate bag and it's generally encrypted with 40-bit
- * RC2-CBC. */
- CBS version_bytes, eci, contents_type, ai, encrypted_contents;
- X509_ALGOR *algor = NULL;
- const uint8_t *inp;
- uint8_t *out;
- size_t out_len;
-
- if (!CBS_get_asn1(&wrapped_contents, &contents, CBS_ASN1_SEQUENCE) ||
- !CBS_get_asn1(&contents, &version_bytes, CBS_ASN1_INTEGER) ||
- /* EncryptedContentInfo, see
- * https://tools.ietf.org/html/rfc2315#section-10.1 */
- !CBS_get_asn1(&contents, &eci, CBS_ASN1_SEQUENCE) ||
- !CBS_get_asn1(&eci, &contents_type, CBS_ASN1_OBJECT) ||
- /* AlgorithmIdentifier, see
- * https://tools.ietf.org/html/rfc5280#section-4.1.1.2 */
- !CBS_get_asn1_element(&eci, &ai, CBS_ASN1_SEQUENCE) ||
- !CBS_get_asn1(&eci, &encrypted_contents,
- CBS_ASN1_CONTEXT_SPECIFIC | 0)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- if (OBJ_cbs2nid(&contents_type) != NID_pkcs7_data) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- inp = CBS_data(&ai);
- algor = d2i_X509_ALGOR(NULL, &inp, CBS_len(&ai));
- if (algor == NULL) {
- goto err;
- }
- if (inp != CBS_data(&ai) + CBS_len(&ai)) {
- X509_ALGOR_free(algor);
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- if (!pbe_crypt(algor, ctx->password, ctx->password_len,
- CBS_data(&encrypted_contents), CBS_len(&encrypted_contents),
- &out, &out_len, 0 /* decrypt */)) {
- X509_ALGOR_free(algor);
- goto err;
- }
- X509_ALGOR_free(algor);
-
- CBS_init(&content_infos, out, out_len);
- ret = PKCS12_handle_content_infos(&content_infos, depth + 1, ctx);
- OPENSSL_free(out);
- } else if (nid == NID_pkcs7_data) {
- CBS octet_string_contents;
-
- if (!CBS_get_asn1(&wrapped_contents, &octet_string_contents,
- CBS_ASN1_OCTETSTRING)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- ret = PKCS12_handle_content_infos(&octet_string_contents, depth + 1, ctx);
- } else if (nid == NID_pkcs8ShroudedKeyBag) {
- /* See ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-12/pkcs-12v1.pdf, section
- * 4.2.2. */
- const uint8_t *inp = CBS_data(&wrapped_contents);
- PKCS8_PRIV_KEY_INFO *pki = NULL;
- X509_SIG *encrypted = NULL;
-
- if (*ctx->out_key) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_MULTIPLE_PRIVATE_KEYS_IN_PKCS12);
- goto err;
- }
-
- /* encrypted isn't actually an X.509 signature, but it has the same
- * structure as one and so |X509_SIG| is reused to store it. */
- encrypted = d2i_X509_SIG(NULL, &inp, CBS_len(&wrapped_contents));
- if (encrypted == NULL) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
- if (inp != CBS_data(&wrapped_contents) + CBS_len(&wrapped_contents)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- X509_SIG_free(encrypted);
- goto err;
- }
-
- pki = PKCS8_decrypt_pbe(encrypted, ctx->password, ctx->password_len);
- X509_SIG_free(encrypted);
- if (pki == NULL) {
- goto err;
- }
-
- *ctx->out_key = EVP_PKCS82PKEY(pki);
- PKCS8_PRIV_KEY_INFO_free(pki);
-
- if (ctx->out_key == NULL) {
- goto err;
- }
- ret = 1;
- } else if (nid == NID_certBag) {
- CBS cert_bag, cert_type, wrapped_cert, cert;
-
- if (!CBS_get_asn1(&wrapped_contents, &cert_bag, CBS_ASN1_SEQUENCE) ||
- !CBS_get_asn1(&cert_bag, &cert_type, CBS_ASN1_OBJECT) ||
- !CBS_get_asn1(&cert_bag, &wrapped_cert,
- CBS_ASN1_CONTEXT_SPECIFIC | CBS_ASN1_CONSTRUCTED | 0) ||
- !CBS_get_asn1(&wrapped_cert, &cert, CBS_ASN1_OCTETSTRING)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- if (OBJ_cbs2nid(&cert_type) == NID_x509Certificate) {
- const uint8_t *inp = CBS_data(&cert);
- X509 *x509 = d2i_X509(NULL, &inp, CBS_len(&cert));
- if (!x509) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
- if (inp != CBS_data(&cert) + CBS_len(&cert)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- X509_free(x509);
- goto err;
- }
-
- if (0 == sk_X509_push(ctx->out_certs, x509)) {
- X509_free(x509);
- goto err;
- }
- }
- ret = 1;
- } else {
- /* Unknown element type - ignore it. */
- ret = 1;
- }
-
- err:
- return ret;
- }
-
- int PKCS12_get_key_and_certs(EVP_PKEY **out_key, STACK_OF(X509) *out_certs,
- CBS *ber_in, const char *password) {
- uint8_t *der_bytes = NULL;
- size_t der_len;
- CBS in, pfx, mac_data, authsafe, content_type, wrapped_authsafes, authsafes;
- uint64_t version;
- int ret = 0;
- struct pkcs12_context ctx;
- const size_t original_out_certs_len = sk_X509_num(out_certs);
-
- /* The input may be in BER format. */
- if (!CBS_asn1_ber_to_der(ber_in, &der_bytes, &der_len)) {
- return 0;
- }
- if (der_bytes != NULL) {
- CBS_init(&in, der_bytes, der_len);
- } else {
- CBS_init(&in, CBS_data(ber_in), CBS_len(ber_in));
- }
-
- *out_key = NULL;
- memset(&ctx, 0, sizeof(ctx));
-
- /* See ftp://ftp.rsasecurity.com/pub/pkcs/pkcs-12/pkcs-12v1.pdf, section
- * four. */
- if (!CBS_get_asn1(&in, &pfx, CBS_ASN1_SEQUENCE) ||
- CBS_len(&in) != 0 ||
- !CBS_get_asn1_uint64(&pfx, &version)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- if (version < 3) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_VERSION);
- goto err;
- }
-
- if (!CBS_get_asn1(&pfx, &authsafe, CBS_ASN1_SEQUENCE)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- if (CBS_len(&pfx) == 0) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_MISSING_MAC);
- goto err;
- }
-
- if (!CBS_get_asn1(&pfx, &mac_data, CBS_ASN1_SEQUENCE)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- /* authsafe is a PKCS#7 ContentInfo. See
- * https://tools.ietf.org/html/rfc2315#section-7. */
- if (!CBS_get_asn1(&authsafe, &content_type, CBS_ASN1_OBJECT) ||
- !CBS_get_asn1(&authsafe, &wrapped_authsafes,
- CBS_ASN1_CONTEXT_SPECIFIC | CBS_ASN1_CONSTRUCTED | 0)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- /* The content type can either be |NID_pkcs7_data| or |NID_pkcs7_signed|. The
- * latter indicates that it's signed by a public key, which isn't
- * supported. */
- if (OBJ_cbs2nid(&content_type) != NID_pkcs7_data) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_PKCS12_PUBLIC_KEY_INTEGRITY_NOT_SUPPORTED);
- goto err;
- }
-
- if (!CBS_get_asn1(&wrapped_authsafes, &authsafes, CBS_ASN1_OCTETSTRING)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- ctx.out_key = out_key;
- ctx.out_certs = out_certs;
- if (!ascii_to_ucs2(password, strlen(password), &ctx.password,
- &ctx.password_len)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_DECODE_ERROR);
- goto err;
- }
-
- /* Verify the MAC. */
- {
- CBS mac, hash_type_seq, hash_oid, salt, expected_mac;
- uint64_t iterations;
- int hash_nid;
- const EVP_MD *md;
- uint8_t hmac_key[EVP_MAX_MD_SIZE];
- uint8_t hmac[EVP_MAX_MD_SIZE];
- unsigned hmac_len;
-
- if (!CBS_get_asn1(&mac_data, &mac, CBS_ASN1_SEQUENCE) ||
- !CBS_get_asn1(&mac, &hash_type_seq, CBS_ASN1_SEQUENCE) ||
- !CBS_get_asn1(&hash_type_seq, &hash_oid, CBS_ASN1_OBJECT) ||
- !CBS_get_asn1(&mac, &expected_mac, CBS_ASN1_OCTETSTRING) ||
- !CBS_get_asn1(&mac_data, &salt, CBS_ASN1_OCTETSTRING)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
-
- /* The iteration count is optional and the default is one. */
- iterations = 1;
- if (CBS_len(&mac_data) > 0) {
- if (!CBS_get_asn1_uint64(&mac_data, &iterations) ||
- iterations > INT_MAX) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_BAD_PKCS12_DATA);
- goto err;
- }
- }
-
- hash_nid = OBJ_cbs2nid(&hash_oid);
- if (hash_nid == NID_undef ||
- (md = EVP_get_digestbynid(hash_nid)) == NULL) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_UNKNOWN_HASH);
- goto err;
- }
-
- if (!pkcs12_key_gen_raw(ctx.password, ctx.password_len, CBS_data(&salt),
- CBS_len(&salt), PKCS12_MAC_ID, iterations,
- EVP_MD_size(md), hmac_key, md)) {
- goto err;
- }
-
- if (NULL == HMAC(md, hmac_key, EVP_MD_size(md), CBS_data(&authsafes),
- CBS_len(&authsafes), hmac, &hmac_len)) {
- goto err;
- }
-
- if (!CBS_mem_equal(&expected_mac, hmac, hmac_len)) {
- OPENSSL_PUT_ERROR(PKCS8, PKCS8_R_INCORRECT_PASSWORD);
- goto err;
- }
- }
-
- /* authsafes contains a series of PKCS#7 ContentInfos. */
- if (!PKCS12_handle_content_infos(&authsafes, 0, &ctx)) {
- goto err;
- }
-
- ret = 1;
-
- err:
- OPENSSL_free(ctx.password);
- OPENSSL_free(der_bytes);
- if (!ret) {
- EVP_PKEY_free(*out_key);
- *out_key = NULL;
- while (sk_X509_num(out_certs) > original_out_certs_len) {
- X509 *x509 = sk_X509_pop(out_certs);
- X509_free(x509);
- }
- }
-
- return ret;
- }
-
- void PKCS12_PBE_add(void) {}
-
- struct pkcs12_st {
- uint8_t *ber_bytes;
- size_t ber_len;
- };
-
- PKCS12* d2i_PKCS12(PKCS12 **out_p12, const uint8_t **ber_bytes, size_t ber_len) {
- PKCS12 *p12;
-
- /* out_p12 must be NULL because we don't export the PKCS12 structure. */
- assert(out_p12 == NULL);
-
- p12 = OPENSSL_malloc(sizeof(PKCS12));
- if (!p12) {
- return NULL;
- }
-
- p12->ber_bytes = OPENSSL_malloc(ber_len);
- if (!p12->ber_bytes) {
- OPENSSL_free(p12);
- return NULL;
- }
-
- memcpy(p12->ber_bytes, *ber_bytes, ber_len);
- p12->ber_len = ber_len;
- *ber_bytes += ber_len;
-
- return p12;
- }
-
- PKCS12* d2i_PKCS12_bio(BIO *bio, PKCS12 **out_p12) {
- size_t used = 0;
- BUF_MEM *buf;
- const uint8_t *dummy;
- static const size_t kMaxSize = 256 * 1024;
- PKCS12 *ret = NULL;
-
- buf = BUF_MEM_new();
- if (buf == NULL) {
- return NULL;
- }
- if (BUF_MEM_grow(buf, 8192) == 0) {
- goto out;
- }
-
- for (;;) {
- int n = BIO_read(bio, &buf->data[used], buf->length - used);
- if (n < 0) {
- goto out;
- }
-
- if (n == 0) {
- break;
- }
- used += n;
-
- if (used < buf->length) {
- continue;
- }
-
- if (buf->length > kMaxSize ||
- BUF_MEM_grow(buf, buf->length * 2) == 0) {
- goto out;
- }
- }
-
- dummy = (uint8_t*) buf->data;
- ret = d2i_PKCS12(out_p12, &dummy, used);
-
- out:
- BUF_MEM_free(buf);
- return ret;
- }
-
- PKCS12* d2i_PKCS12_fp(FILE *fp, PKCS12 **out_p12) {
- BIO *bio;
- PKCS12 *ret;
-
- bio = BIO_new_fp(fp, 0 /* don't take ownership */);
- if (!bio) {
- return NULL;
- }
-
- ret = d2i_PKCS12_bio(bio, out_p12);
- BIO_free(bio);
- return ret;
- }
-
- int PKCS12_parse(const PKCS12 *p12, const char *password, EVP_PKEY **out_pkey,
- X509 **out_cert, STACK_OF(X509) **out_ca_certs) {
- CBS ber_bytes;
- STACK_OF(X509) *ca_certs = NULL;
- char ca_certs_alloced = 0;
-
- if (out_ca_certs != NULL && *out_ca_certs != NULL) {
- ca_certs = *out_ca_certs;
- }
-
- if (!ca_certs) {
- ca_certs = sk_X509_new_null();
- if (ca_certs == NULL) {
- return 0;
- }
- ca_certs_alloced = 1;
- }
-
- CBS_init(&ber_bytes, p12->ber_bytes, p12->ber_len);
- if (!PKCS12_get_key_and_certs(out_pkey, ca_certs, &ber_bytes, password)) {
- if (ca_certs_alloced) {
- sk_X509_free(ca_certs);
- }
- return 0;
- }
-
- *out_cert = NULL;
- if (sk_X509_num(ca_certs) > 0) {
- *out_cert = sk_X509_shift(ca_certs);
- }
-
- if (out_ca_certs) {
- *out_ca_certs = ca_certs;
- } else {
- sk_X509_pop_free(ca_certs, X509_free);
- }
-
- return 1;
- }
-
- void PKCS12_free(PKCS12 *p12) {
- OPENSSL_free(p12->ber_bytes);
- OPENSSL_free(p12);
- }
|