| /* |
| * Copyright 1999-2022 The OpenSSL Project Authors. All Rights Reserved. |
| * |
| * Licensed under the Apache License 2.0 (the "License"). You may not use |
| * this file except in compliance with the License. You can obtain a copy |
| * in the file LICENSE in the source distribution or at |
| * https://www.openssl.org/source/license.html |
| */ |
| |
| #include <stdio.h> |
| #include "internal/cryptlib.h" |
| #include "crypto/asn1.h" |
| #include <openssl/asn1t.h> |
| #include <openssl/core.h> |
| #include <openssl/core_names.h> |
| #include <openssl/x509.h> |
| #include <openssl/rand.h> |
| |
| /* PKCS#5 v2.0 password based encryption structures */ |
| |
| ASN1_SEQUENCE(PBE2PARAM) = { |
| ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR), |
| ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR) |
| } ASN1_SEQUENCE_END(PBE2PARAM) |
| |
| IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM) |
| |
| ASN1_SEQUENCE(PBKDF2PARAM) = { |
| ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY), |
| ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER), |
| ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER), |
| ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR) |
| } ASN1_SEQUENCE_END(PBKDF2PARAM) |
| |
| IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM) |
| |
| /* |
| * Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm: yes I know |
| * this is horrible! Extended version to allow application supplied PRF NID |
| * and IV. |
| */ |
| |
| X509_ALGOR *PKCS5_pbe2_set_iv_ex(const EVP_CIPHER *cipher, int iter, |
| unsigned char *salt, int saltlen, |
| unsigned char *aiv, int prf_nid, |
| OSSL_LIB_CTX *libctx) |
| { |
| X509_ALGOR *scheme = NULL, *ret = NULL; |
| int alg_nid, keylen, ivlen; |
| EVP_CIPHER_CTX *ctx = NULL; |
| unsigned char iv[EVP_MAX_IV_LENGTH]; |
| PBE2PARAM *pbe2 = NULL; |
| |
| alg_nid = EVP_CIPHER_get_type(cipher); |
| if (alg_nid == NID_undef) { |
| ERR_raise(ERR_LIB_ASN1, ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER); |
| goto err; |
| } |
| |
| if ((pbe2 = PBE2PARAM_new()) == NULL) |
| goto merr; |
| |
| /* Setup the AlgorithmIdentifier for the encryption scheme */ |
| scheme = pbe2->encryption; |
| scheme->algorithm = OBJ_nid2obj(alg_nid); |
| if ((scheme->parameter = ASN1_TYPE_new()) == NULL) |
| goto merr; |
| |
| /* Create random IV */ |
| ivlen = EVP_CIPHER_get_iv_length(cipher); |
| if (ivlen > 0) { |
| if (aiv) |
| memcpy(iv, aiv, ivlen); |
| else if (RAND_bytes_ex(libctx, iv, ivlen, 0) <= 0) |
| goto err; |
| } |
| |
| ctx = EVP_CIPHER_CTX_new(); |
| if (ctx == NULL) |
| goto merr; |
| |
| /* Dummy cipherinit to just setup the IV, and PRF */ |
| if (!EVP_CipherInit_ex(ctx, cipher, NULL, NULL, iv, 0)) |
| goto err; |
| if (EVP_CIPHER_param_to_asn1(ctx, scheme->parameter) <= 0) { |
| ERR_raise(ERR_LIB_ASN1, ASN1_R_ERROR_SETTING_CIPHER_PARAMS); |
| goto err; |
| } |
| /* |
| * If prf NID unspecified see if cipher has a preference. An error is OK |
| * here: just means use default PRF. |
| */ |
| ERR_set_mark(); |
| if ((prf_nid == -1) && |
| EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0) { |
| prf_nid = NID_hmacWithSHA256; |
| } |
| ERR_pop_to_mark(); |
| EVP_CIPHER_CTX_free(ctx); |
| ctx = NULL; |
| |
| /* If its RC2 then we'd better setup the key length */ |
| |
| if (alg_nid == NID_rc2_cbc) |
| keylen = EVP_CIPHER_get_key_length(cipher); |
| else |
| keylen = -1; |
| |
| /* Setup keyfunc */ |
| |
| X509_ALGOR_free(pbe2->keyfunc); |
| |
| pbe2->keyfunc = PKCS5_pbkdf2_set_ex(iter, salt, saltlen, prf_nid, keylen, |
| libctx); |
| |
| if (pbe2->keyfunc == NULL) |
| goto merr; |
| |
| /* Now set up top level AlgorithmIdentifier */ |
| |
| if ((ret = X509_ALGOR_new()) == NULL) |
| goto merr; |
| |
| ret->algorithm = OBJ_nid2obj(NID_pbes2); |
| |
| /* Encode PBE2PARAM into parameter */ |
| |
| if (!ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(PBE2PARAM), pbe2, |
| &ret->parameter)) |
| goto merr; |
| |
| PBE2PARAM_free(pbe2); |
| pbe2 = NULL; |
| |
| return ret; |
| |
| merr: |
| ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE); |
| |
| err: |
| EVP_CIPHER_CTX_free(ctx); |
| PBE2PARAM_free(pbe2); |
| /* Note 'scheme' is freed as part of pbe2 */ |
| X509_ALGOR_free(ret); |
| |
| return NULL; |
| } |
| |
| X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter, |
| unsigned char *salt, int saltlen, |
| unsigned char *aiv, int prf_nid) |
| { |
| return PKCS5_pbe2_set_iv_ex(cipher, iter, salt, saltlen, aiv, prf_nid, |
| NULL); |
| } |
| |
| X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter, |
| unsigned char *salt, int saltlen) |
| { |
| return PKCS5_pbe2_set_iv_ex(cipher, iter, salt, saltlen, NULL, -1, |
| NULL); |
| } |
| |
| |
| X509_ALGOR *PKCS5_pbkdf2_set_ex(int iter, unsigned char *salt, int saltlen, |
| int prf_nid, int keylen, |
| OSSL_LIB_CTX *libctx) |
| { |
| X509_ALGOR *keyfunc = NULL; |
| PBKDF2PARAM *kdf = NULL; |
| ASN1_OCTET_STRING *osalt = NULL; |
| |
| if ((kdf = PBKDF2PARAM_new()) == NULL) |
| goto merr; |
| if ((osalt = ASN1_OCTET_STRING_new()) == NULL) |
| goto merr; |
| |
| kdf->salt->value.octet_string = osalt; |
| kdf->salt->type = V_ASN1_OCTET_STRING; |
| |
| if (saltlen < 0) |
| goto merr; |
| if (saltlen == 0) |
| saltlen = PKCS5_SALT_LEN; |
| if ((osalt->data = OPENSSL_malloc(saltlen)) == NULL) |
| goto merr; |
| |
| osalt->length = saltlen; |
| |
| if (salt) |
| memcpy(osalt->data, salt, saltlen); |
| else if (RAND_bytes_ex(libctx, osalt->data, saltlen, 0) <= 0) |
| goto merr; |
| |
| if (iter <= 0) |
| iter = PKCS5_DEFAULT_ITER; |
| |
| if (!ASN1_INTEGER_set(kdf->iter, iter)) |
| goto merr; |
| |
| /* If have a key len set it up */ |
| |
| if (keylen > 0) { |
| if ((kdf->keylength = ASN1_INTEGER_new()) == NULL) |
| goto merr; |
| if (!ASN1_INTEGER_set(kdf->keylength, keylen)) |
| goto merr; |
| } |
| |
| /* prf can stay NULL if we are using hmacWithSHA1 */ |
| if (prf_nid > 0 && prf_nid != NID_hmacWithSHA1) { |
| kdf->prf = ossl_X509_ALGOR_from_nid(prf_nid, V_ASN1_NULL, NULL); |
| if (kdf->prf == NULL) |
| goto merr; |
| } |
| |
| /* Finally setup the keyfunc structure */ |
| |
| keyfunc = X509_ALGOR_new(); |
| if (keyfunc == NULL) |
| goto merr; |
| |
| keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2); |
| |
| /* Encode PBKDF2PARAM into parameter of pbe2 */ |
| |
| if (!ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(PBKDF2PARAM), kdf, |
| &keyfunc->parameter)) |
| goto merr; |
| |
| PBKDF2PARAM_free(kdf); |
| return keyfunc; |
| |
| merr: |
| ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE); |
| PBKDF2PARAM_free(kdf); |
| X509_ALGOR_free(keyfunc); |
| return NULL; |
| } |
| |
| X509_ALGOR *PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen, |
| int prf_nid, int keylen) |
| { |
| return PKCS5_pbkdf2_set_ex(iter, salt, saltlen, prf_nid, keylen, NULL); |
| } |
| |
