97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
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/*
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* Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include "internal/cryptlib.h"
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#include <openssl/asn1t.h>
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#include <openssl/x509.h>
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#include <openssl/rand.h>
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/* PKCS#5 password based encryption structure */
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ASN1_SEQUENCE(PBEPARAM) = {
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ASN1_SIMPLE(PBEPARAM, salt, ASN1_OCTET_STRING),
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ASN1_SIMPLE(PBEPARAM, iter, ASN1_INTEGER)
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} ASN1_SEQUENCE_END(PBEPARAM)
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IMPLEMENT_ASN1_FUNCTIONS(PBEPARAM)
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/* Set an algorithm identifier for a PKCS#5 PBE algorithm */
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int PKCS5_pbe_set0_algor(X509_ALGOR *algor, int alg, int iter,
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const unsigned char *salt, int saltlen)
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{
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PBEPARAM *pbe = NULL;
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ASN1_STRING *pbe_str = NULL;
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unsigned char *sstr = NULL;
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pbe = PBEPARAM_new();
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if (pbe == NULL) {
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ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (iter <= 0)
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iter = PKCS5_DEFAULT_ITER;
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if (!ASN1_INTEGER_set(pbe->iter, iter)) {
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ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (!saltlen)
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saltlen = PKCS5_SALT_LEN;
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sstr = OPENSSL_malloc(saltlen);
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if (sstr == NULL) {
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ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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if (salt)
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memcpy(sstr, salt, saltlen);
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else if (RAND_bytes(sstr, saltlen) <= 0)
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goto err;
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ASN1_STRING_set0(pbe->salt, sstr, saltlen);
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sstr = NULL;
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if (!ASN1_item_pack(pbe, ASN1_ITEM_rptr(PBEPARAM), &pbe_str)) {
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ASN1err(ASN1_F_PKCS5_PBE_SET0_ALGOR, ERR_R_MALLOC_FAILURE);
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goto err;
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}
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PBEPARAM_free(pbe);
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pbe = NULL;
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if (X509_ALGOR_set0(algor, OBJ_nid2obj(alg), V_ASN1_SEQUENCE, pbe_str))
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return 1;
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err:
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OPENSSL_free(sstr);
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PBEPARAM_free(pbe);
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ASN1_STRING_free(pbe_str);
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return 0;
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}
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/* Return an algorithm identifier for a PKCS#5 PBE algorithm */
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X509_ALGOR *PKCS5_pbe_set(int alg, int iter,
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const unsigned char *salt, int saltlen)
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{
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X509_ALGOR *ret;
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ret = X509_ALGOR_new();
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if (ret == NULL) {
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ASN1err(ASN1_F_PKCS5_PBE_SET, ERR_R_MALLOC_FAILURE);
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return NULL;
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}
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if (PKCS5_pbe_set0_algor(ret, alg, iter, salt, saltlen))
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return ret;
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X509_ALGOR_free(ret);
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return NULL;
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}
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