2 * Copyright 1999-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
12 #include "internal/cryptlib.h"
13 #include <openssl/x509.h>
14 #include <openssl/evp.h>
17 * Doesn't do anything now: Builtin PBE algorithms in static table.
20 void PKCS5_PBE_add(void)
24 int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
25 ASN1_TYPE *param, const EVP_CIPHER *cipher,
26 const EVP_MD *md, int en_de)
29 unsigned char md_tmp[EVP_MAX_MD_SIZE];
30 unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
38 /* Extract useful info from parameter */
39 if (param == NULL || param->type != V_ASN1_SEQUENCE ||
40 param->value.sequence == NULL) {
41 EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
45 pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), param);
47 EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_DECODE_ERROR);
51 ivl = EVP_CIPHER_iv_length(cipher);
52 if (ivl < 0 || ivl > 16) {
53 EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_INVALID_IV_LENGTH);
57 kl = EVP_CIPHER_key_length(cipher);
58 if (kl < 0 || kl > (int)sizeof(md_tmp)) {
59 EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_INVALID_KEY_LENGTH);
64 if (pbe->iter == NULL)
67 iter = ASN1_INTEGER_get(pbe->iter);
68 salt = pbe->salt->data;
69 saltlen = pbe->salt->length;
73 else if (passlen == -1)
74 passlen = strlen(pass);
76 ctx = EVP_MD_CTX_new();
78 EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, ERR_R_MALLOC_FAILURE);
82 if (!EVP_DigestInit_ex(ctx, md, NULL))
84 if (!EVP_DigestUpdate(ctx, pass, passlen))
86 if (!EVP_DigestUpdate(ctx, salt, saltlen))
90 if (!EVP_DigestFinal_ex(ctx, md_tmp, NULL))
92 mdsize = EVP_MD_size(md);
95 for (i = 1; i < iter; i++) {
96 if (!EVP_DigestInit_ex(ctx, md, NULL))
98 if (!EVP_DigestUpdate(ctx, md_tmp, mdsize))
100 if (!EVP_DigestFinal_ex(ctx, md_tmp, NULL))
103 memcpy(key, md_tmp, kl);
104 memcpy(iv, md_tmp + (16 - ivl), ivl);
105 if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de))
107 OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);
108 OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
109 OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
113 EVP_MD_CTX_free(ctx);