p5_pbev2.c revision 59191
155714Skris/* p5_pbev2.c */ 255714Skris/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL 355714Skris * project 1999. 455714Skris */ 555714Skris/* ==================================================================== 655714Skris * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 755714Skris * 855714Skris * Redistribution and use in source and binary forms, with or without 955714Skris * modification, are permitted provided that the following conditions 1055714Skris * are met: 1155714Skris * 1255714Skris * 1. Redistributions of source code must retain the above copyright 1355714Skris * notice, this list of conditions and the following disclaimer. 1455714Skris * 1555714Skris * 2. Redistributions in binary form must reproduce the above copyright 1655714Skris * notice, this list of conditions and the following disclaimer in 1755714Skris * the documentation and/or other materials provided with the 1855714Skris * distribution. 1955714Skris * 2055714Skris * 3. All advertising materials mentioning features or use of this 2155714Skris * software must display the following acknowledgment: 2255714Skris * "This product includes software developed by the OpenSSL Project 2355714Skris * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 2455714Skris * 2555714Skris * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 2655714Skris * endorse or promote products derived from this software without 2755714Skris * prior written permission. For written permission, please contact 2855714Skris * licensing@OpenSSL.org. 2955714Skris * 3055714Skris * 5. Products derived from this software may not be called "OpenSSL" 3155714Skris * nor may "OpenSSL" appear in their names without prior written 3255714Skris * permission of the OpenSSL Project. 3355714Skris * 3455714Skris * 6. Redistributions of any form whatsoever must retain the following 3555714Skris * acknowledgment: 3655714Skris * "This product includes software developed by the OpenSSL Project 3755714Skris * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 3855714Skris * 3955714Skris * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 4055714Skris * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 4155714Skris * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 4255714Skris * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 4355714Skris * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 4455714Skris * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 4555714Skris * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 4655714Skris * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4755714Skris * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 4855714Skris * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 4955714Skris * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 5055714Skris * OF THE POSSIBILITY OF SUCH DAMAGE. 5155714Skris * ==================================================================== 5255714Skris * 5355714Skris * This product includes cryptographic software written by Eric Young 5455714Skris * (eay@cryptsoft.com). This product includes software written by Tim 5555714Skris * Hudson (tjh@cryptsoft.com). 5655714Skris * 5755714Skris */ 5855714Skris 5955714Skris#include <stdio.h> 6055714Skris#include "cryptlib.h" 6155714Skris#include <openssl/asn1_mac.h> 6255714Skris#include <openssl/x509.h> 6355714Skris#include <openssl/rand.h> 6455714Skris 6555714Skris/* PKCS#5 v2.0 password based encryption structures */ 6655714Skris 6755714Skrisint i2d_PBE2PARAM(PBE2PARAM *a, unsigned char **pp) 6855714Skris{ 6955714Skris M_ASN1_I2D_vars(a); 7055714Skris M_ASN1_I2D_len (a->keyfunc, i2d_X509_ALGOR); 7155714Skris M_ASN1_I2D_len (a->encryption, i2d_X509_ALGOR); 7255714Skris 7355714Skris M_ASN1_I2D_seq_total (); 7455714Skris 7555714Skris M_ASN1_I2D_put (a->keyfunc, i2d_X509_ALGOR); 7655714Skris M_ASN1_I2D_put (a->encryption, i2d_X509_ALGOR); 7755714Skris 7855714Skris M_ASN1_I2D_finish(); 7955714Skris} 8055714Skris 8155714SkrisPBE2PARAM *PBE2PARAM_new(void) 8255714Skris{ 8355714Skris PBE2PARAM *ret=NULL; 8455714Skris ASN1_CTX c; 8555714Skris M_ASN1_New_Malloc(ret, PBE2PARAM); 8655714Skris M_ASN1_New(ret->keyfunc,X509_ALGOR_new); 8755714Skris M_ASN1_New(ret->encryption,X509_ALGOR_new); 8855714Skris return (ret); 8955714Skris M_ASN1_New_Error(ASN1_F_PBE2PARAM_NEW); 9055714Skris} 9155714Skris 9255714SkrisPBE2PARAM *d2i_PBE2PARAM(PBE2PARAM **a, unsigned char **pp, long length) 9355714Skris{ 9455714Skris M_ASN1_D2I_vars(a,PBE2PARAM *,PBE2PARAM_new); 9555714Skris M_ASN1_D2I_Init(); 9655714Skris M_ASN1_D2I_start_sequence(); 9755714Skris M_ASN1_D2I_get (ret->keyfunc, d2i_X509_ALGOR); 9855714Skris M_ASN1_D2I_get (ret->encryption, d2i_X509_ALGOR); 9955714Skris M_ASN1_D2I_Finish(a, PBE2PARAM_free, ASN1_F_D2I_PBE2PARAM); 10055714Skris} 10155714Skris 10255714Skrisvoid PBE2PARAM_free (PBE2PARAM *a) 10355714Skris{ 10455714Skris if(a==NULL) return; 10555714Skris X509_ALGOR_free(a->keyfunc); 10655714Skris X509_ALGOR_free(a->encryption); 10759191Skris Free (a); 10855714Skris} 10955714Skris 11055714Skrisint i2d_PBKDF2PARAM(PBKDF2PARAM *a, unsigned char **pp) 11155714Skris{ 11255714Skris M_ASN1_I2D_vars(a); 11355714Skris M_ASN1_I2D_len (a->salt, i2d_ASN1_TYPE); 11455714Skris M_ASN1_I2D_len (a->iter, i2d_ASN1_INTEGER); 11555714Skris M_ASN1_I2D_len (a->keylength, i2d_ASN1_INTEGER); 11655714Skris M_ASN1_I2D_len (a->prf, i2d_X509_ALGOR); 11755714Skris 11855714Skris M_ASN1_I2D_seq_total (); 11955714Skris 12055714Skris M_ASN1_I2D_put (a->salt, i2d_ASN1_TYPE); 12155714Skris M_ASN1_I2D_put (a->iter, i2d_ASN1_INTEGER); 12255714Skris M_ASN1_I2D_put (a->keylength, i2d_ASN1_INTEGER); 12355714Skris M_ASN1_I2D_put (a->prf, i2d_X509_ALGOR); 12455714Skris 12555714Skris M_ASN1_I2D_finish(); 12655714Skris} 12755714Skris 12855714SkrisPBKDF2PARAM *PBKDF2PARAM_new(void) 12955714Skris{ 13055714Skris PBKDF2PARAM *ret=NULL; 13155714Skris ASN1_CTX c; 13255714Skris M_ASN1_New_Malloc(ret, PBKDF2PARAM); 13355714Skris M_ASN1_New(ret->salt, ASN1_TYPE_new); 13459191Skris M_ASN1_New(ret->iter, M_ASN1_INTEGER_new); 13555714Skris ret->keylength = NULL; 13655714Skris ret->prf = NULL; 13755714Skris return (ret); 13855714Skris M_ASN1_New_Error(ASN1_F_PBKDF2PARAM_NEW); 13955714Skris} 14055714Skris 14155714SkrisPBKDF2PARAM *d2i_PBKDF2PARAM(PBKDF2PARAM **a, unsigned char **pp, 14255714Skris long length) 14355714Skris{ 14455714Skris M_ASN1_D2I_vars(a,PBKDF2PARAM *,PBKDF2PARAM_new); 14555714Skris M_ASN1_D2I_Init(); 14655714Skris M_ASN1_D2I_start_sequence(); 14755714Skris M_ASN1_D2I_get (ret->salt, d2i_ASN1_TYPE); 14855714Skris M_ASN1_D2I_get (ret->iter, d2i_ASN1_INTEGER); 14955714Skris M_ASN1_D2I_get_opt (ret->keylength, d2i_ASN1_INTEGER, V_ASN1_INTEGER); 15055714Skris M_ASN1_D2I_get_opt (ret->prf, d2i_X509_ALGOR, V_ASN1_SEQUENCE); 15155714Skris M_ASN1_D2I_Finish(a, PBKDF2PARAM_free, ASN1_F_D2I_PBKDF2PARAM); 15255714Skris} 15355714Skris 15455714Skrisvoid PBKDF2PARAM_free (PBKDF2PARAM *a) 15555714Skris{ 15655714Skris if(a==NULL) return; 15755714Skris ASN1_TYPE_free(a->salt); 15859191Skris M_ASN1_INTEGER_free(a->iter); 15959191Skris M_ASN1_INTEGER_free(a->keylength); 16055714Skris X509_ALGOR_free(a->prf); 16159191Skris Free (a); 16255714Skris} 16355714Skris 16455714Skris/* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm: 16555714Skris * yes I know this is horrible! 16655714Skris */ 16755714Skris 16855714SkrisX509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter, 16955714Skris unsigned char *salt, int saltlen) 17055714Skris{ 17155714Skris X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL; 17255714Skris int alg_nid; 17355714Skris EVP_CIPHER_CTX ctx; 17455714Skris unsigned char iv[EVP_MAX_IV_LENGTH]; 17555714Skris PBKDF2PARAM *kdf = NULL; 17655714Skris PBE2PARAM *pbe2 = NULL; 17755714Skris ASN1_OCTET_STRING *osalt = NULL; 17859191Skris ASN1_OBJECT *obj; 17955714Skris 18059191Skris alg_nid = EVP_CIPHER_type(cipher); 18159191Skris if(alg_nid == NID_undef) { 18259191Skris ASN1err(ASN1_F_PKCS5_PBE2_SET, 18359191Skris ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER); 18459191Skris goto err; 18559191Skris } 18659191Skris obj = OBJ_nid2obj(alg_nid); 18759191Skris 18855714Skris if(!(pbe2 = PBE2PARAM_new())) goto merr; 18955714Skris 19055714Skris /* Setup the AlgorithmIdentifier for the encryption scheme */ 19155714Skris scheme = pbe2->encryption; 19255714Skris 19359191Skris scheme->algorithm = obj; 19455714Skris if(!(scheme->parameter = ASN1_TYPE_new())) goto merr; 19555714Skris 19655714Skris /* Create random IV */ 19759191Skris if (RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0) 19859191Skris goto err; 19955714Skris 20055714Skris /* Dummy cipherinit to just setup the IV */ 20155714Skris EVP_CipherInit(&ctx, cipher, NULL, iv, 0); 20255714Skris if(EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) { 20355714Skris ASN1err(ASN1_F_PKCS5_PBE2_SET, 20455714Skris ASN1_R_ERROR_SETTING_CIPHER_PARAMS); 20555714Skris goto err; 20655714Skris } 20755714Skris EVP_CIPHER_CTX_cleanup(&ctx); 20855714Skris 20955714Skris if(!(kdf = PBKDF2PARAM_new())) goto merr; 21059191Skris if(!(osalt = M_ASN1_OCTET_STRING_new())) goto merr; 21155714Skris 21255714Skris if (!saltlen) saltlen = PKCS5_SALT_LEN; 21355714Skris if (!(osalt->data = Malloc (saltlen))) goto merr; 21455714Skris osalt->length = saltlen; 21555714Skris if (salt) memcpy (osalt->data, salt, saltlen); 21659191Skris else if (RAND_pseudo_bytes (osalt->data, saltlen) < 0) goto merr; 21755714Skris 21855714Skris if(iter <= 0) iter = PKCS5_DEFAULT_ITER; 21955714Skris if(!ASN1_INTEGER_set(kdf->iter, iter)) goto merr; 22055714Skris 22155714Skris /* Now include salt in kdf structure */ 22255714Skris kdf->salt->value.octet_string = osalt; 22355714Skris kdf->salt->type = V_ASN1_OCTET_STRING; 22455714Skris osalt = NULL; 22555714Skris 22655714Skris /* If its RC2 then we'd better setup the key length */ 22755714Skris 22855714Skris if(alg_nid == NID_rc2_cbc) { 22959191Skris if(!(kdf->keylength = M_ASN1_INTEGER_new())) goto merr; 23055714Skris if(!ASN1_INTEGER_set (kdf->keylength, 23155714Skris EVP_CIPHER_key_length(cipher))) goto merr; 23255714Skris } 23355714Skris 23455714Skris /* prf can stay NULL because we are using hmacWithSHA1 */ 23555714Skris 23655714Skris /* Now setup the PBE2PARAM keyfunc structure */ 23755714Skris 23855714Skris pbe2->keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2); 23955714Skris 24055714Skris /* Encode PBKDF2PARAM into parameter of pbe2 */ 24155714Skris 24255714Skris if(!(pbe2->keyfunc->parameter = ASN1_TYPE_new())) goto merr; 24355714Skris 24455714Skris if(!ASN1_pack_string(kdf, i2d_PBKDF2PARAM, 24555714Skris &pbe2->keyfunc->parameter->value.sequence)) goto merr; 24655714Skris pbe2->keyfunc->parameter->type = V_ASN1_SEQUENCE; 24755714Skris 24855714Skris PBKDF2PARAM_free(kdf); 24955714Skris kdf = NULL; 25055714Skris 25155714Skris /* Now set up top level AlgorithmIdentifier */ 25255714Skris 25355714Skris if(!(ret = X509_ALGOR_new())) goto merr; 25455714Skris if(!(ret->parameter = ASN1_TYPE_new())) goto merr; 25555714Skris 25655714Skris ret->algorithm = OBJ_nid2obj(NID_pbes2); 25755714Skris 25855714Skris /* Encode PBE2PARAM into parameter */ 25955714Skris 26055714Skris if(!ASN1_pack_string(pbe2, i2d_PBE2PARAM, 26155714Skris &ret->parameter->value.sequence)) goto merr; 26255714Skris ret->parameter->type = V_ASN1_SEQUENCE; 26355714Skris 26455714Skris PBE2PARAM_free(pbe2); 26555714Skris pbe2 = NULL; 26655714Skris 26755714Skris return ret; 26855714Skris 26955714Skris merr: 27055714Skris ASN1err(ASN1_F_PKCS5_PBE2_SET,ERR_R_MALLOC_FAILURE); 27155714Skris 27255714Skris err: 27355714Skris PBE2PARAM_free(pbe2); 27455714Skris /* Note 'scheme' is freed as part of pbe2 */ 27559191Skris M_ASN1_OCTET_STRING_free(osalt); 27655714Skris PBKDF2PARAM_free(kdf); 27755714Skris X509_ALGOR_free(kalg); 27855714Skris X509_ALGOR_free(ret); 27955714Skris 28055714Skris return NULL; 28155714Skris 28255714Skris} 283