mirror of
https://github.com/openssl/openssl.git
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284 lines
7.9 KiB
C
284 lines
7.9 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 "internal/cryptlib.h"
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#include "crypto/asn1.h"
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#include "crypto/evp.h"
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#include <openssl/asn1t.h>
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#include <openssl/core.h>
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#include <openssl/core_names.h>
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#include <openssl/x509.h>
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#include <openssl/rand.h>
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/* PKCS#5 v2.0 password based encryption structures */
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ASN1_SEQUENCE(PBE2PARAM) = {
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ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR),
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ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR)
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} ASN1_SEQUENCE_END(PBE2PARAM)
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IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM)
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ASN1_SEQUENCE(PBKDF2PARAM) = {
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ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY),
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ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER),
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ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER),
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ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR)
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} ASN1_SEQUENCE_END(PBKDF2PARAM)
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IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM)
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ASN1_SEQUENCE(PBMAC1PARAM) = {
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ASN1_SIMPLE(PBMAC1PARAM, keyDerivationFunc, X509_ALGOR),
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ASN1_SIMPLE(PBMAC1PARAM, messageAuthScheme, X509_ALGOR)
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} ASN1_SEQUENCE_END(PBMAC1PARAM)
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IMPLEMENT_ASN1_FUNCTIONS(PBMAC1PARAM)
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/*
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* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm: yes I know
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* this is horrible! Extended version to allow application supplied PRF NID
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* and IV.
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*/
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X509_ALGOR *PKCS5_pbe2_set_iv_ex(const EVP_CIPHER *cipher, int iter,
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unsigned char *salt, int saltlen,
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unsigned char *aiv, int prf_nid,
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OSSL_LIB_CTX *libctx)
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{
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X509_ALGOR *scheme = NULL, *ret = NULL;
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int alg_nid, keylen, ivlen;
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EVP_CIPHER_CTX *ctx = NULL;
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unsigned char iv[EVP_MAX_IV_LENGTH];
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PBE2PARAM *pbe2 = NULL;
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alg_nid = EVP_CIPHER_get_type(cipher);
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if (alg_nid == NID_undef) {
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ERR_raise(ERR_LIB_ASN1, ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
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goto err;
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}
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if ((pbe2 = PBE2PARAM_new()) == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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goto err;
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}
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/* Setup the AlgorithmIdentifier for the encryption scheme */
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scheme = pbe2->encryption;
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scheme->algorithm = OBJ_nid2obj(alg_nid);
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if ((scheme->parameter = ASN1_TYPE_new()) == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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goto err;
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}
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/* Create random IV */
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ivlen = EVP_CIPHER_get_iv_length(cipher);
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if (ivlen > 0) {
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if (aiv)
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memcpy(iv, aiv, ivlen);
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else if (RAND_bytes_ex(libctx, iv, ivlen, 0) <= 0)
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goto err;
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}
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ctx = EVP_CIPHER_CTX_new();
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if (ctx == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_EVP_LIB);
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goto err;
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}
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/* Dummy cipherinit to just setup the IV, and PRF */
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if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, iv, 0))
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goto err;
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if (EVP_CIPHER_param_to_asn1(ctx, scheme->parameter) <= 0) {
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ERR_raise(ERR_LIB_ASN1, ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
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goto err;
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}
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/*
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* If prf NID unspecified see if cipher has a preference. An error is OK
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* here: just means use default PRF.
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*/
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ERR_set_mark();
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if ((prf_nid == -1) &&
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EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0) {
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prf_nid = NID_hmacWithSHA256;
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}
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ERR_pop_to_mark();
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EVP_CIPHER_CTX_free(ctx);
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ctx = NULL;
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/* If its RC2 then we'd better setup the key length */
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if (alg_nid == NID_rc2_cbc)
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keylen = EVP_CIPHER_get_key_length(cipher);
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else
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keylen = -1;
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/* Setup keyfunc */
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X509_ALGOR_free(pbe2->keyfunc);
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pbe2->keyfunc = PKCS5_pbkdf2_set_ex(iter, salt, saltlen, prf_nid, keylen,
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libctx);
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if (pbe2->keyfunc == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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goto err;
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}
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/* Now set up top level AlgorithmIdentifier */
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if ((ret = X509_ALGOR_new()) == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_X509_LIB);
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goto err;
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}
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ret->algorithm = OBJ_nid2obj(NID_pbes2);
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/* Encode PBE2PARAM into parameter */
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if (!ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(PBE2PARAM), pbe2,
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&ret->parameter)) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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goto err;
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}
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PBE2PARAM_free(pbe2);
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pbe2 = NULL;
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return ret;
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err:
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EVP_CIPHER_CTX_free(ctx);
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PBE2PARAM_free(pbe2);
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/* Note 'scheme' is freed as part of pbe2 */
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X509_ALGOR_free(ret);
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return NULL;
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}
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X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter,
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unsigned char *salt, int saltlen,
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unsigned char *aiv, int prf_nid)
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{
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return PKCS5_pbe2_set_iv_ex(cipher, iter, salt, saltlen, aiv, prf_nid,
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NULL);
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}
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X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter,
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unsigned char *salt, int saltlen)
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{
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return PKCS5_pbe2_set_iv_ex(cipher, iter, salt, saltlen, NULL, -1,
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NULL);
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}
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X509_ALGOR *PKCS5_pbkdf2_set_ex(int iter, unsigned char *salt, int saltlen,
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int prf_nid, int keylen,
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OSSL_LIB_CTX *libctx)
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{
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X509_ALGOR *keyfunc = NULL;
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PBKDF2PARAM *kdf = NULL;
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ASN1_OCTET_STRING *osalt = NULL;
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if ((kdf = PBKDF2PARAM_new()) == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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goto err;
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}
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if ((osalt = ASN1_OCTET_STRING_new()) == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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goto err;
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}
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kdf->salt->value.octet_string = osalt;
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kdf->salt->type = V_ASN1_OCTET_STRING;
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if (saltlen < 0) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_PASSED_INVALID_ARGUMENT);
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goto err;
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}
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if (saltlen == 0)
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saltlen = PKCS5_DEFAULT_PBE2_SALT_LEN;
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if ((osalt->data = OPENSSL_malloc(saltlen)) == NULL)
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goto err;
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osalt->length = saltlen;
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if (salt) {
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memcpy(osalt->data, salt, saltlen);
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} else if (RAND_bytes_ex(libctx, osalt->data, saltlen, 0) <= 0) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_RAND_LIB);
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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(kdf->iter, iter)) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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goto err;
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}
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/* If have a key len set it up */
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if (keylen > 0) {
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if ((kdf->keylength = ASN1_INTEGER_new()) == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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goto err;
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}
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if (!ASN1_INTEGER_set(kdf->keylength, keylen)) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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goto err;
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}
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}
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/* prf can stay NULL if we are using hmacWithSHA1 */
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if (prf_nid > 0 && prf_nid != NID_hmacWithSHA1) {
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kdf->prf = ossl_X509_ALGOR_from_nid(prf_nid, V_ASN1_NULL, NULL);
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if (kdf->prf == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_X509_LIB);
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goto err;
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}
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}
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/* Finally setup the keyfunc structure */
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keyfunc = X509_ALGOR_new();
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if (keyfunc == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_X509_LIB);
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goto err;
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}
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keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2);
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/* Encode PBKDF2PARAM into parameter of pbe2 */
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if (!ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(PBKDF2PARAM), kdf,
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&keyfunc->parameter)) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_ASN1_LIB);
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goto err;
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}
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PBKDF2PARAM_free(kdf);
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return keyfunc;
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err:
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PBKDF2PARAM_free(kdf);
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X509_ALGOR_free(keyfunc);
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return NULL;
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}
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X509_ALGOR *PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen,
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int prf_nid, int keylen)
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{
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return PKCS5_pbkdf2_set_ex(iter, salt, saltlen, prf_nid, keylen, NULL);
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}
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