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Commit | Line | Data |
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0f113f3e | 1 | /* |
62867571 | 2 | * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved. |
ef8335d9 | 3 | * |
62867571 RS |
4 | * Licensed under the OpenSSL license (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 | |
ef8335d9 DSH |
8 | */ |
9 | ||
10 | #include <stdio.h> | |
11 | #include <stdlib.h> | |
b39fc560 | 12 | #include "internal/cryptlib.h" |
ef8335d9 DSH |
13 | #include <openssl/x509.h> |
14 | #include <openssl/evp.h> | |
ef8335d9 | 15 | |
0f113f3e MC |
16 | /* |
17 | * Doesn't do anything now: Builtin PBE algorithms in static table. | |
ef8335d9 DSH |
18 | */ |
19 | ||
20 | void PKCS5_PBE_add(void) | |
21 | { | |
ef8335d9 DSH |
22 | } |
23 | ||
2bd83ca1 | 24 | int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen, |
0f113f3e MC |
25 | ASN1_TYPE *param, const EVP_CIPHER *cipher, |
26 | const EVP_MD *md, int en_de) | |
ef8335d9 | 27 | { |
77a01145 | 28 | EVP_MD_CTX *ctx; |
0f113f3e MC |
29 | unsigned char md_tmp[EVP_MAX_MD_SIZE]; |
30 | unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH]; | |
3948408f | 31 | int i, ivl, kl; |
0f113f3e MC |
32 | PBEPARAM *pbe; |
33 | int saltlen, iter; | |
34 | unsigned char *salt; | |
0f113f3e MC |
35 | int mdsize; |
36 | int rv = 0; | |
69cbf468 | 37 | |
0f113f3e MC |
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); | |
42 | return 0; | |
43 | } | |
c755c5fd | 44 | |
e93c8748 DSH |
45 | pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), param); |
46 | if (pbe == NULL) { | |
0f113f3e MC |
47 | EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_DECODE_ERROR); |
48 | return 0; | |
49 | } | |
69cbf468 | 50 | |
3948408f P |
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); | |
54 | return 0; | |
55 | } | |
56 | kl = EVP_CIPHER_key_length(cipher); | |
57 | if (kl < 0 || kl > (int)sizeof(md_tmp)) { | |
58 | EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, EVP_R_INVALID_KEY_LENGTH); | |
59 | return 0; | |
60 | } | |
61 | ||
0f113f3e MC |
62 | if (!pbe->iter) |
63 | iter = 1; | |
64 | else | |
65 | iter = ASN1_INTEGER_get(pbe->iter); | |
66 | salt = pbe->salt->data; | |
67 | saltlen = pbe->salt->length; | |
69cbf468 | 68 | |
0f113f3e MC |
69 | if (!pass) |
70 | passlen = 0; | |
71 | else if (passlen == -1) | |
72 | passlen = strlen(pass); | |
a331a305 | 73 | |
bfb0641f | 74 | ctx = EVP_MD_CTX_new(); |
77a01145 RL |
75 | if (ctx == NULL) { |
76 | EVPerr(EVP_F_PKCS5_PBE_KEYIVGEN, ERR_R_MALLOC_FAILURE); | |
0f113f3e | 77 | goto err; |
77a01145 RL |
78 | } |
79 | ||
80 | if (!EVP_DigestInit_ex(ctx, md, NULL)) | |
81 | goto err; | |
82 | if (!EVP_DigestUpdate(ctx, pass, passlen)) | |
0f113f3e | 83 | goto err; |
77a01145 | 84 | if (!EVP_DigestUpdate(ctx, salt, saltlen)) |
0f113f3e MC |
85 | goto err; |
86 | PBEPARAM_free(pbe); | |
77a01145 | 87 | if (!EVP_DigestFinal_ex(ctx, md_tmp, NULL)) |
0f113f3e MC |
88 | goto err; |
89 | mdsize = EVP_MD_size(md); | |
90 | if (mdsize < 0) | |
91 | return 0; | |
92 | for (i = 1; i < iter; i++) { | |
77a01145 | 93 | if (!EVP_DigestInit_ex(ctx, md, NULL)) |
0f113f3e | 94 | goto err; |
77a01145 | 95 | if (!EVP_DigestUpdate(ctx, md_tmp, mdsize)) |
0f113f3e | 96 | goto err; |
77a01145 | 97 | if (!EVP_DigestFinal_ex(ctx, md_tmp, NULL)) |
0f113f3e MC |
98 | goto err; |
99 | } | |
3948408f P |
100 | memcpy(key, md_tmp, kl); |
101 | memcpy(iv, md_tmp + (16 - ivl), ivl); | |
0f113f3e MC |
102 | if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de)) |
103 | goto err; | |
104 | OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE); | |
105 | OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH); | |
106 | OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH); | |
107 | rv = 1; | |
108 | err: | |
bfb0641f | 109 | EVP_MD_CTX_free(ctx); |
0f113f3e | 110 | return rv; |
ef8335d9 | 111 | } |