mirror of
https://github.com/openssl/openssl.git
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121 lines
3.7 KiB
C
121 lines
3.7 KiB
C
/*
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* Copyright 1999-2024 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (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 <stdlib.h>
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#include "internal/cryptlib.h"
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#include <openssl/x509.h>
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#include <openssl/evp.h>
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#include <openssl/core_names.h>
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#include <openssl/kdf.h>
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/*
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* Doesn't do anything now: Builtin PBE algorithms in static table.
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*/
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void PKCS5_PBE_add(void)
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{
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}
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int PKCS5_PBE_keyivgen_ex(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
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ASN1_TYPE *param, const EVP_CIPHER *cipher,
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const EVP_MD *md, int en_de, OSSL_LIB_CTX *libctx,
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const char *propq)
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{
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unsigned char md_tmp[EVP_MAX_MD_SIZE];
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unsigned char key[EVP_MAX_KEY_LENGTH], iv[EVP_MAX_IV_LENGTH];
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int ivl, kl;
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PBEPARAM *pbe = NULL;
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int saltlen, iter;
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unsigned char *salt;
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int mdsize;
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int rv = 0;
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EVP_KDF *kdf;
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EVP_KDF_CTX *kctx = NULL;
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OSSL_PARAM params[5], *p = params;
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const char *mdname = EVP_MD_name(md);
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/* Extract useful info from parameter */
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if (param == NULL || param->type != V_ASN1_SEQUENCE ||
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param->value.sequence == NULL) {
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ERR_raise(ERR_LIB_EVP, EVP_R_DECODE_ERROR);
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return 0;
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}
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pbe = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(PBEPARAM), param);
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if (pbe == NULL) {
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ERR_raise(ERR_LIB_EVP, EVP_R_DECODE_ERROR);
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return 0;
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}
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ivl = EVP_CIPHER_get_iv_length(cipher);
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if (ivl < 0 || ivl > 16) {
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ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_IV_LENGTH);
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goto err;
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}
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kl = EVP_CIPHER_get_key_length(cipher);
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if (kl < 0 || kl > (int)sizeof(md_tmp)) {
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ERR_raise(ERR_LIB_EVP, EVP_R_INVALID_KEY_LENGTH);
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goto err;
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}
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if (pbe->iter == NULL)
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iter = 1;
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else
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iter = ASN1_INTEGER_get(pbe->iter);
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salt = pbe->salt->data;
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saltlen = pbe->salt->length;
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if (pass == NULL)
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passlen = 0;
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else if (passlen == -1)
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passlen = strlen(pass);
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mdsize = EVP_MD_get_size(md);
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if (mdsize <= 0)
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goto err;
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kdf = EVP_KDF_fetch(libctx, OSSL_KDF_NAME_PBKDF1, propq);
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kctx = EVP_KDF_CTX_new(kdf);
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EVP_KDF_free(kdf);
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if (kctx == NULL)
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goto err;
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_PASSWORD,
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(char *)pass, (size_t)passlen);
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*p++ = OSSL_PARAM_construct_octet_string(OSSL_KDF_PARAM_SALT,
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salt, saltlen);
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*p++ = OSSL_PARAM_construct_int(OSSL_KDF_PARAM_ITER, &iter);
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*p++ = OSSL_PARAM_construct_utf8_string(OSSL_KDF_PARAM_DIGEST,
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(char *)mdname, 0);
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*p = OSSL_PARAM_construct_end();
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if (EVP_KDF_derive(kctx, md_tmp, mdsize, params) != 1)
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goto err;
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memcpy(key, md_tmp, kl);
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memcpy(iv, md_tmp + (16 - ivl), ivl);
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if (!EVP_CipherInit_ex(cctx, cipher, NULL, key, iv, en_de))
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goto err;
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OPENSSL_cleanse(md_tmp, EVP_MAX_MD_SIZE);
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OPENSSL_cleanse(key, EVP_MAX_KEY_LENGTH);
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OPENSSL_cleanse(iv, EVP_MAX_IV_LENGTH);
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rv = 1;
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err:
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EVP_KDF_CTX_free(kctx);
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PBEPARAM_free(pbe);
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return rv;
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}
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int PKCS5_PBE_keyivgen(EVP_CIPHER_CTX *cctx, const char *pass, int passlen,
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ASN1_TYPE *param, const EVP_CIPHER *cipher,
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const EVP_MD *md, int en_de)
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{
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return PKCS5_PBE_keyivgen_ex(cctx, pass, passlen, param, cipher, md, en_de,
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NULL, NULL);
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}
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