1 /*
2 * Copyright 1999-2024 The OpenSSL Project Authors. All Rights Reserved.
3 *
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
8 */
9
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include "internal/cryptlib.h"
13 #include <openssl/x509.h>
14 #include <openssl/evp.h>
15 #include <openssl/core_names.h>
16 #include <openssl/kdf.h>
17
18 /*
19 * Doesn't do anything now: Builtin PBE algorithms in static table.
20 */
21
PKCS5_PBE_add(void)22 void PKCS5_PBE_add(void)
23 {
24 }
25
PKCS5_PBE_keyivgen_ex(EVP_CIPHER_CTX * cctx,const char * pass,int passlen,ASN1_TYPE * param,const EVP_CIPHER * cipher,const EVP_MD * md,int en_de,OSSL_LIB_CTX * libctx,const char * propq)26 int PKCS5_PBE_keyivgen_ex(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
27 ASN1_TYPE *param, const EVP_CIPHER *cipher,
28 const EVP_MD *md, int en_de, OSSL_LIB_CTX *libctx,
29 const char *propq)
30 {
31 unsigned char md_tmp[EVP_MAX_MD_SIZE];
32 unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
33 int ivl, kl;
34 PBEPARAM *pbe = NULL;
35 int saltlen, iter;
36 unsigned char *salt;
37 int mdsize;
38 int rv = 0;
39 EVP_KDF *kdf;
40 EVP_KDF_CTX *kctx = NULL;
41 OSSL_PARAM params[5], *p = params;
42 const char *mdname = EVP_MD_name(md);
43
44 /* Extract useful info from parameter */
45 if (param == NULL || param->type != V_ASN1_SEQUENCE ||
46 param->value.sequence == NULL) {
47 ERR_raise(ERR_LIB_EVP, EVP_R_DECODE_ERROR);
48 return 0;
49 }
50
51 pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), param);
52 if (pbe == NULL) {
53 ERR_raise(ERR_LIB_EVP, EVP_R_DECODE_ERROR);
54 return 0;
55 }
56
57 ivl = EVP_CIPHER_get_iv_length(cipher);
58 if (ivl < 0 || ivl > 16) {
59 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
60 goto err;
61 }
62 kl = EVP_CIPHER_get_key_length(cipher);
63 if (kl < 0 || kl > (int)sizeof(md_tmp)) {
64 ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
65 goto err;
66 }
67
68 if (pbe->iter == NULL)
69 iter = 1;
70 else
71 iter = ASN1_INTEGER_get(pbe->iter);
72 salt = pbe->salt->data;
73 saltlen = pbe->salt->length;
74
75 if (pass == NULL)
76 passlen = 0;
77 else if (passlen == -1)
78 passlen = strlen(pass);
79
80 mdsize = EVP_MD_get_size(md);
81 if (mdsize <= 0)
82 goto err;
83
84 kdf = EVP_KDF_fetch(libctx, OSSL_KDF_NAME_PBKDF1, propq);
85 kctx = EVP_KDF_CTX_new(kdf);
86 EVP_KDF_free(kdf);
87 if (kctx == NULL)
88 goto err;
89 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_PASSWORD,
90 (char *)pass, (size_t)passlen);
91 *p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT,
92 salt, saltlen);
93 *p++ = OSSL_PARAM_construct_int(OSSL_KDF_PARAM_ITER, &iter);
94 *p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
95 (char *)mdname, 0);
96 *p = OSSL_PARAM_construct_end();
97 if (EVP_KDF_derive(kctx, md_tmp, mdsize, params) != 1)
98 goto err;
99 memcpy(key, md_tmp, kl);
100 memcpy(iv, md_tmp + (16 - ivl), ivl);
101 if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de))
102 goto err;
103 OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);
104 OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
105 OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
106 rv = 1;
107 err:
108 EVP_KDF_CTX_free(kctx);
109 PBEPARAM_free(pbe);
110 return rv;
111 }
112
PKCS5_PBE_keyivgen(EVP_CIPHER_CTX * cctx,const char * pass,int passlen,ASN1_TYPE * param,const EVP_CIPHER * cipher,const EVP_MD * md,int en_de)113 int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
114 ASN1_TYPE *param, const EVP_CIPHER *cipher,
115 const EVP_MD *md, int en_de)
116 {
117 return PKCS5_PBE_keyivgen_ex(cctx, pass, passlen, param, cipher, md, en_de,
118 NULL, NULL);
119 }
120
121
