1 | /* |
2 | * Copyright 1999-2016 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 "internal/cryptlib.h" |
12 | #include <openssl/asn1t.h> |
13 | #include <openssl/x509.h> |
14 | #include <openssl/rand.h> |
15 | |
16 | /* PKCS#5 password based encryption structure */ |
17 | |
18 | ASN1_SEQUENCE(PBEPARAM) = { |
19 | ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING), |
20 | ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER) |
21 | } ASN1_SEQUENCE_END(PBEPARAM) |
22 | |
23 | IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM) |
24 | |
25 | /* Set an algorithm identifier for a PKCS#5 PBE algorithm */ |
26 | |
27 | int PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter, |
28 | const unsigned char *salt, int saltlen) |
29 | { |
30 | PBEPARAM *pbe = NULL; |
31 | ASN1_STRING *pbe_str = NULL; |
32 | unsigned char *sstr = NULL; |
33 | |
34 | pbe = PBEPARAM_new(); |
35 | if (pbe == NULL) { |
36 | ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); |
37 | goto err; |
38 | } |
39 | if (iter <= 0) |
40 | iter = PKCS5_DEFAULT_ITER; |
41 | if (!ASN1_INTEGER_set(pbe->iter, iter)) { |
42 | ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); |
43 | goto err; |
44 | } |
45 | if (!saltlen) |
46 | saltlen = PKCS5_SALT_LEN; |
47 | |
48 | sstr = OPENSSL_malloc(saltlen); |
49 | if (sstr == NULL) { |
50 | ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); |
51 | goto err; |
52 | } |
53 | if (salt) |
54 | memcpy(sstr, salt, saltlen); |
55 | else if (RAND_bytes(sstr, saltlen) <= 0) |
56 | goto err; |
57 | |
58 | ASN1_STRING_set0(pbe->salt, sstr, saltlen); |
59 | sstr = NULL; |
60 | |
61 | if (!ASN1_item_pack(pbe, ASN1_ITEM_rptr(PBEPARAM), &pbe_str)) { |
62 | ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE); |
63 | goto err; |
64 | } |
65 | |
66 | PBEPARAM_free(pbe); |
67 | pbe = NULL; |
68 | |
69 | if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str)) |
70 | return 1; |
71 | |
72 | err: |
73 | OPENSSL_free(sstr); |
74 | PBEPARAM_free(pbe); |
75 | ASN1_STRING_free(pbe_str); |
76 | return 0; |
77 | } |
78 | |
79 | /* Return an algorithm identifier for a PKCS#5 PBE algorithm */ |
80 | |
81 | X509_ALGOR *PKCS5_pbe_set(int alg, int iter, |
82 | const unsigned char *salt, int saltlen) |
83 | { |
84 | X509_ALGOR *ret; |
85 | ret = X509_ALGOR_new(); |
86 | if (ret == NULL) { |
87 | ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE); |
88 | return NULL; |
89 | } |
90 | |
91 | if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen)) |
92 | return ret; |
93 | |
94 | X509_ALGOR_free(ret); |
95 | return NULL; |
96 | } |
97 | |