| 1 | /*
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| 2 | * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
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| 3 | *
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| 4 | * Licensed under the OpenSSL license (the "License"). You may not use
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| 5 | * this file except in compliance with the License. You can obtain a copy
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| 6 | * in the file LICENSE in the source distribution or at
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| 7 | * https://www.openssl.org/source/license.html
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| 8 | */
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| 9 |
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| 10 | #include <stdio.h>
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| 11 | #include "internal/cryptlib.h"
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| 12 | #include <openssl/asn1t.h>
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| 13 | #include <openssl/x509.h>
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| 14 | #include <openssl/rand.h>
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| 15 |
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| 16 | /* PKCS#5 password based encryption structure */
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| 17 |
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| 18 | ASN1_SEQUENCE(PBEPARAM) = {
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| 19 | ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING),
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| 20 | ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER)
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| 21 | } ASN1_SEQUENCE_END(PBEPARAM)
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| 22 |
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| 23 | IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM)
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| 24 |
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| 25 | /* Set an algorithm identifier for a PKCS#5 PBE algorithm */
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| 26 |
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| 27 | int PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter,
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| 28 | const unsigned char *salt, int saltlen)
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| 29 | {
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| 30 | PBEPARAM *pbe = NULL;
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| 31 | ASN1_STRING *pbe_str = NULL;
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| 32 | unsigned char *sstr = NULL;
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| 33 |
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| 34 | pbe = PBEPARAM_new();
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| 35 | if (pbe == NULL) {
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| 36 | ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
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| 37 | goto err;
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| 38 | }
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| 39 | if (iter <= 0)
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| 40 | iter = PKCS5_DEFAULT_ITER;
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| 41 | if (!ASN1_INTEGER_set(pbe->iter, iter)) {
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| 42 | ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
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| 43 | goto err;
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| 44 | }
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| 45 | if (!saltlen)
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| 46 | saltlen = PKCS5_SALT_LEN;
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| 47 |
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| 48 | sstr = OPENSSL_malloc(saltlen);
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| 49 | if (sstr == NULL) {
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| 50 | ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
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| 51 | goto err;
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| 52 | }
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| 53 | if (salt)
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| 54 | memcpy(sstr, salt, saltlen);
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| 55 | else if (RAND_bytes(sstr, saltlen) <= 0)
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| 56 | goto err;
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| 57 |
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| 58 | ASN1_STRING_set0(pbe->salt, sstr, saltlen);
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| 59 | sstr = NULL;
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| 60 |
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| 61 | if (!ASN1_item_pack(pbe, ASN1_ITEM_rptr(PBEPARAM), &pbe_str)) {
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| 62 | ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
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| 63 | goto err;
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| 64 | }
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| 65 |
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| 66 | PBEPARAM_free(pbe);
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| 67 | pbe = NULL;
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| 68 |
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| 69 | if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str))
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| 70 | return 1;
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| 71 |
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| 72 | err:
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| 73 | OPENSSL_free(sstr);
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| 74 | PBEPARAM_free(pbe);
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| 75 | ASN1_STRING_free(pbe_str);
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| 76 | return 0;
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| 77 | }
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| 78 |
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| 79 | /* Return an algorithm identifier for a PKCS#5 PBE algorithm */
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| 80 |
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| 81 | X509_ALGOR *PKCS5_pbe_set(int alg, int iter,
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| 82 | const unsigned char *salt, int saltlen)
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| 83 | {
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| 84 | X509_ALGOR *ret;
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| 85 | ret = X509_ALGOR_new();
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| 86 | if (ret == NULL) {
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| 87 | ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
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| 88 | return NULL;
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| 89 | }
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| 90 |
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| 91 | if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen))
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| 92 | return ret;
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| 93 |
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| 94 | X509_ALGOR_free(ret);
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| 95 | return NULL;
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| 96 | }
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