155714Skris/* p5_pbev2.c */ 2296465Sdelphij/* 3296465Sdelphij * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project 4296465Sdelphij * 1999-2004. 555714Skris */ 655714Skris/* ==================================================================== 755714Skris * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 855714Skris * 955714Skris * Redistribution and use in source and binary forms, with or without 1055714Skris * modification, are permitted provided that the following conditions 1155714Skris * are met: 1255714Skris * 1355714Skris * 1. Redistributions of source code must retain the above copyright 14296465Sdelphij * notice, this list of conditions and the following disclaimer. 1555714Skris * 1655714Skris * 2. Redistributions in binary form must reproduce the above copyright 1755714Skris * notice, this list of conditions and the following disclaimer in 1855714Skris * the documentation and/or other materials provided with the 1955714Skris * distribution. 2055714Skris * 2155714Skris * 3. All advertising materials mentioning features or use of this 2255714Skris * software must display the following acknowledgment: 2355714Skris * "This product includes software developed by the OpenSSL Project 2455714Skris * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 2555714Skris * 2655714Skris * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 2755714Skris * endorse or promote products derived from this software without 2855714Skris * prior written permission. For written permission, please contact 2955714Skris * licensing@OpenSSL.org. 3055714Skris * 3155714Skris * 5. Products derived from this software may not be called "OpenSSL" 3255714Skris * nor may "OpenSSL" appear in their names without prior written 3355714Skris * permission of the OpenSSL Project. 3455714Skris * 3555714Skris * 6. Redistributions of any form whatsoever must retain the following 3655714Skris * acknowledgment: 3755714Skris * "This product includes software developed by the OpenSSL Project 3855714Skris * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 3955714Skris * 4055714Skris * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 4155714Skris * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4255714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 4355714Skris * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 4455714Skris * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 4555714Skris * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 4655714Skris * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 4755714Skris * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4855714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 4955714Skris * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 5055714Skris * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 5155714Skris * OF THE POSSIBILITY OF SUCH DAMAGE. 5255714Skris * ==================================================================== 5355714Skris * 5455714Skris * This product includes cryptographic software written by Eric Young 5555714Skris * (eay@cryptsoft.com). This product includes software written by Tim 5655714Skris * Hudson (tjh@cryptsoft.com). 5755714Skris * 5855714Skris */ 5955714Skris 6055714Skris#include <stdio.h> 6155714Skris#include "cryptlib.h" 62109998Smarkm#include <openssl/asn1t.h> 6355714Skris#include <openssl/x509.h> 6455714Skris#include <openssl/rand.h> 6555714Skris 6655714Skris/* PKCS#5 v2.0 password based encryption structures */ 6755714Skris 68109998SmarkmASN1_SEQUENCE(PBE2PARAM) = { 69296465Sdelphij ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR), 70296465Sdelphij ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR) 71109998Smarkm} ASN1_SEQUENCE_END(PBE2PARAM) 7255714Skris 73109998SmarkmIMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM) 7455714Skris 75109998SmarkmASN1_SEQUENCE(PBKDF2PARAM) = { 76296465Sdelphij ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY), 77296465Sdelphij ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER), 78296465Sdelphij ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER), 79296465Sdelphij ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR) 80109998Smarkm} ASN1_SEQUENCE_END(PBKDF2PARAM) 8155714Skris 82109998SmarkmIMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM) 8355714Skris 84296465Sdelphij/* 85296465Sdelphij * Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm: yes I know 86296465Sdelphij * this is horrible! 8755714Skris */ 8855714Skris 8955714SkrisX509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter, 90296465Sdelphij unsigned char *salt, int saltlen) 9155714Skris{ 92296465Sdelphij X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL; 93296465Sdelphij int alg_nid; 94296465Sdelphij EVP_CIPHER_CTX ctx; 95296465Sdelphij unsigned char iv[EVP_MAX_IV_LENGTH]; 96296465Sdelphij PBKDF2PARAM *kdf = NULL; 97296465Sdelphij PBE2PARAM *pbe2 = NULL; 98296465Sdelphij ASN1_OCTET_STRING *osalt = NULL; 99296465Sdelphij ASN1_OBJECT *obj; 10055714Skris 101296465Sdelphij alg_nid = EVP_CIPHER_type(cipher); 102296465Sdelphij if (alg_nid == NID_undef) { 103296465Sdelphij ASN1err(ASN1_F_PKCS5_PBE2_SET, 104296465Sdelphij ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER); 105296465Sdelphij goto err; 106296465Sdelphij } 107296465Sdelphij obj = OBJ_nid2obj(alg_nid); 10859191Skris 109296465Sdelphij if (!(pbe2 = PBE2PARAM_new())) 110296465Sdelphij goto merr; 11155714Skris 112296465Sdelphij /* Setup the AlgorithmIdentifier for the encryption scheme */ 113296465Sdelphij scheme = pbe2->encryption; 11455714Skris 115296465Sdelphij scheme->algorithm = obj; 116296465Sdelphij if (!(scheme->parameter = ASN1_TYPE_new())) 117296465Sdelphij goto merr; 11855714Skris 119296465Sdelphij /* Create random IV */ 120296465Sdelphij if (EVP_CIPHER_iv_length(cipher) && 121296465Sdelphij RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0) 122296465Sdelphij goto err; 12355714Skris 124296465Sdelphij EVP_CIPHER_CTX_init(&ctx); 125109998Smarkm 126296465Sdelphij /* Dummy cipherinit to just setup the IV */ 127296465Sdelphij EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0); 128296465Sdelphij if (EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) { 129296465Sdelphij ASN1err(ASN1_F_PKCS5_PBE2_SET, ASN1_R_ERROR_SETTING_CIPHER_PARAMS); 130296465Sdelphij EVP_CIPHER_CTX_cleanup(&ctx); 131296465Sdelphij goto err; 132296465Sdelphij } 133296465Sdelphij EVP_CIPHER_CTX_cleanup(&ctx); 13455714Skris 135296465Sdelphij if (!(kdf = PBKDF2PARAM_new())) 136296465Sdelphij goto merr; 137296465Sdelphij if (!(osalt = M_ASN1_OCTET_STRING_new())) 138296465Sdelphij goto merr; 13955714Skris 140296465Sdelphij if (!saltlen) 141296465Sdelphij saltlen = PKCS5_SALT_LEN; 142296465Sdelphij if (!(osalt->data = OPENSSL_malloc(saltlen))) 143296465Sdelphij goto merr; 144296465Sdelphij osalt->length = saltlen; 145296465Sdelphij if (salt) 146296465Sdelphij memcpy(osalt->data, salt, saltlen); 147296465Sdelphij else if (RAND_pseudo_bytes(osalt->data, saltlen) < 0) 148296465Sdelphij goto merr; 14955714Skris 150296465Sdelphij if (iter <= 0) 151296465Sdelphij iter = PKCS5_DEFAULT_ITER; 152296465Sdelphij if (!ASN1_INTEGER_set(kdf->iter, iter)) 153296465Sdelphij goto merr; 15455714Skris 155296465Sdelphij /* Now include salt in kdf structure */ 156296465Sdelphij kdf->salt->value.octet_string = osalt; 157296465Sdelphij kdf->salt->type = V_ASN1_OCTET_STRING; 158296465Sdelphij osalt = NULL; 15955714Skris 160296465Sdelphij /* If its RC2 then we'd better setup the key length */ 16155714Skris 162296465Sdelphij if (alg_nid == NID_rc2_cbc) { 163296465Sdelphij if (!(kdf->keylength = M_ASN1_INTEGER_new())) 164296465Sdelphij goto merr; 165296465Sdelphij if (!ASN1_INTEGER_set(kdf->keylength, EVP_CIPHER_key_length(cipher))) 166296465Sdelphij goto merr; 167296465Sdelphij } 16855714Skris 169296465Sdelphij /* prf can stay NULL because we are using hmacWithSHA1 */ 17055714Skris 171296465Sdelphij /* Now setup the PBE2PARAM keyfunc structure */ 17255714Skris 173296465Sdelphij pbe2->keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2); 17455714Skris 175296465Sdelphij /* Encode PBKDF2PARAM into parameter of pbe2 */ 17655714Skris 177296465Sdelphij if (!(pbe2->keyfunc->parameter = ASN1_TYPE_new())) 178296465Sdelphij goto merr; 17955714Skris 180296465Sdelphij if (!ASN1_pack_string_of(PBKDF2PARAM, kdf, i2d_PBKDF2PARAM, 181296465Sdelphij &pbe2->keyfunc->parameter->value.sequence)) 182296465Sdelphij goto merr; 183296465Sdelphij pbe2->keyfunc->parameter->type = V_ASN1_SEQUENCE; 18455714Skris 185296465Sdelphij PBKDF2PARAM_free(kdf); 186296465Sdelphij kdf = NULL; 18755714Skris 188296465Sdelphij /* Now set up top level AlgorithmIdentifier */ 18955714Skris 190296465Sdelphij if (!(ret = X509_ALGOR_new())) 191296465Sdelphij goto merr; 192296465Sdelphij if (!(ret->parameter = ASN1_TYPE_new())) 193296465Sdelphij goto merr; 19455714Skris 195296465Sdelphij ret->algorithm = OBJ_nid2obj(NID_pbes2); 19655714Skris 197296465Sdelphij /* Encode PBE2PARAM into parameter */ 19855714Skris 199296465Sdelphij if (!ASN1_pack_string_of(PBE2PARAM, pbe2, i2d_PBE2PARAM, 200296465Sdelphij &ret->parameter->value.sequence)) 201296465Sdelphij goto merr; 202296465Sdelphij ret->parameter->type = V_ASN1_SEQUENCE; 20355714Skris 204296465Sdelphij PBE2PARAM_free(pbe2); 205296465Sdelphij pbe2 = NULL; 20655714Skris 207296465Sdelphij return ret; 20855714Skris 209296465Sdelphij merr: 210296465Sdelphij ASN1err(ASN1_F_PKCS5_PBE2_SET, ERR_R_MALLOC_FAILURE); 21155714Skris 212296465Sdelphij err: 213296465Sdelphij PBE2PARAM_free(pbe2); 214296465Sdelphij /* Note 'scheme' is freed as part of pbe2 */ 215296465Sdelphij M_ASN1_OCTET_STRING_free(osalt); 216296465Sdelphij PBKDF2PARAM_free(kdf); 217296465Sdelphij X509_ALGOR_free(kalg); 218296465Sdelphij X509_ALGOR_free(ret); 21955714Skris 220296465Sdelphij return NULL; 22155714Skris 22255714Skris} 223