373 lines
9.4 KiB
C
373 lines
9.4 KiB
C
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/* $OpenBSD: p5_pbev2.c,v 1.25 2017/01/29 17:49:22 beck Exp $ */
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/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
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* project 1999-2004.
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*/
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/* ====================================================================
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* Copyright (c) 1999 The OpenSSL Project. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* 3. All advertising materials mentioning features or use of this
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* software must display the following acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
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*
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* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
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* endorse or promote products derived from this software without
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* prior written permission. For written permission, please contact
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* licensing@OpenSSL.org.
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*
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* 5. Products derived from this software may not be called "OpenSSL"
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* nor may "OpenSSL" appear in their names without prior written
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* permission of the OpenSSL Project.
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*
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* 6. Redistributions of any form whatsoever must retain the following
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* acknowledgment:
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* "This product includes software developed by the OpenSSL Project
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* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
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*
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* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
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* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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* ====================================================================
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*
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* This product includes cryptographic software written by Eric Young
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* (eay@cryptsoft.com). This product includes software written by Tim
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* Hudson (tjh@cryptsoft.com).
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <openssl/asn1t.h>
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#include <openssl/err.h>
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#include <openssl/x509.h>
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/* PKCS#5 v2.0 password based encryption structures */
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static const ASN1_TEMPLATE PBE2PARAM_seq_tt[] = {
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{
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.offset = offsetof(PBE2PARAM, keyfunc),
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.field_name = "keyfunc",
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.item = &X509_ALGOR_it,
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},
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{
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.offset = offsetof(PBE2PARAM, encryption),
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.field_name = "encryption",
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.item = &X509_ALGOR_it,
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},
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};
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const ASN1_ITEM PBE2PARAM_it = {
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.itype = ASN1_ITYPE_SEQUENCE,
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.utype = V_ASN1_SEQUENCE,
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.templates = PBE2PARAM_seq_tt,
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.tcount = sizeof(PBE2PARAM_seq_tt) / sizeof(ASN1_TEMPLATE),
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.size = sizeof(PBE2PARAM),
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.sname = "PBE2PARAM",
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};
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PBE2PARAM *
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d2i_PBE2PARAM(PBE2PARAM **a, const unsigned char **in, long len)
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{
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return (PBE2PARAM *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
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&PBE2PARAM_it);
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}
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int
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i2d_PBE2PARAM(PBE2PARAM *a, unsigned char **out)
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{
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return ASN1_item_i2d((ASN1_VALUE *)a, out, &PBE2PARAM_it);
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}
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PBE2PARAM *
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PBE2PARAM_new(void)
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{
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return (PBE2PARAM *)ASN1_item_new(&PBE2PARAM_it);
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}
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void
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PBE2PARAM_free(PBE2PARAM *a)
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{
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ASN1_item_free((ASN1_VALUE *)a, &PBE2PARAM_it);
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}
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static const ASN1_TEMPLATE PBKDF2PARAM_seq_tt[] = {
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{
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.offset = offsetof(PBKDF2PARAM, salt),
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.field_name = "salt",
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.item = &ASN1_ANY_it,
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},
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{
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.offset = offsetof(PBKDF2PARAM, iter),
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.field_name = "iter",
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.item = &ASN1_INTEGER_it,
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},
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{
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.flags = ASN1_TFLG_OPTIONAL,
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.offset = offsetof(PBKDF2PARAM, keylength),
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.field_name = "keylength",
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.item = &ASN1_INTEGER_it,
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},
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{
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.flags = ASN1_TFLG_OPTIONAL,
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.offset = offsetof(PBKDF2PARAM, prf),
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.field_name = "prf",
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.item = &X509_ALGOR_it,
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},
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};
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const ASN1_ITEM PBKDF2PARAM_it = {
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.itype = ASN1_ITYPE_SEQUENCE,
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.utype = V_ASN1_SEQUENCE,
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.templates = PBKDF2PARAM_seq_tt,
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.tcount = sizeof(PBKDF2PARAM_seq_tt) / sizeof(ASN1_TEMPLATE),
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.size = sizeof(PBKDF2PARAM),
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.sname = "PBKDF2PARAM",
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};
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PBKDF2PARAM *
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d2i_PBKDF2PARAM(PBKDF2PARAM **a, const unsigned char **in, long len)
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{
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return (PBKDF2PARAM *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,
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&PBKDF2PARAM_it);
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}
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int
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i2d_PBKDF2PARAM(PBKDF2PARAM *a, unsigned char **out)
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{
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return ASN1_item_i2d((ASN1_VALUE *)a, out, &PBKDF2PARAM_it);
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}
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PBKDF2PARAM *
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PBKDF2PARAM_new(void)
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{
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return (PBKDF2PARAM *)ASN1_item_new(&PBKDF2PARAM_it);
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}
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void
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PBKDF2PARAM_free(PBKDF2PARAM *a)
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{
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ASN1_item_free((ASN1_VALUE *)a, &PBKDF2PARAM_it);
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}
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/* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm:
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* yes I know this is horrible!
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*
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* Extended version to allow application supplied PRF NID and IV.
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*/
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X509_ALGOR *
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PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter, unsigned char *salt,
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int saltlen, unsigned char *aiv, int prf_nid)
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{
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X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL;
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int alg_nid, keylen;
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EVP_CIPHER_CTX ctx;
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unsigned char iv[EVP_MAX_IV_LENGTH];
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PBE2PARAM *pbe2 = NULL;
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ASN1_OBJECT *obj;
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alg_nid = EVP_CIPHER_type(cipher);
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if (alg_nid == NID_undef) {
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ASN1error(ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER);
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goto err;
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}
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obj = OBJ_nid2obj(alg_nid);
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if (!(pbe2 = PBE2PARAM_new()))
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goto merr;
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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;
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if (!(scheme->parameter = ASN1_TYPE_new()))
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goto merr;
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/* Create random IV */
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if (EVP_CIPHER_iv_length(cipher)) {
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if (aiv)
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memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher));
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else
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arc4random_buf(iv, EVP_CIPHER_iv_length(cipher));
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}
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EVP_CIPHER_CTX_init(&ctx);
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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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ASN1error(ASN1_R_ERROR_SETTING_CIPHER_PARAMS);
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EVP_CIPHER_CTX_cleanup(&ctx);
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goto err;
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}
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/* If prf NID unspecified see if cipher has a preference.
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* An error is OK here: just means use default PRF.
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*/
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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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ERR_clear_error();
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prf_nid = NID_hmacWithSHA1;
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}
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EVP_CIPHER_CTX_cleanup(&ctx);
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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_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(iter, salt, saltlen, prf_nid, keylen);
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if (!pbe2->keyfunc)
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goto merr;
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/* Now set up top level AlgorithmIdentifier */
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if (!(ret = X509_ALGOR_new()))
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goto merr;
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if (!(ret->parameter = ASN1_TYPE_new()))
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goto merr;
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ret->algorithm = OBJ_nid2obj(NID_pbes2);
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/* Encode PBE2PARAM into parameter */
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if (!ASN1_item_pack(pbe2, &PBE2PARAM_it,
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&ret->parameter->value.sequence)) goto merr;
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ret->parameter->type = V_ASN1_SEQUENCE;
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PBE2PARAM_free(pbe2);
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pbe2 = NULL;
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return ret;
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merr:
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ASN1error(ERR_R_MALLOC_FAILURE);
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err:
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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(kalg);
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X509_ALGOR_free(ret);
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return NULL;
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}
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X509_ALGOR *
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PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter, unsigned char *salt,
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int saltlen)
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{
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return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1);
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}
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X509_ALGOR *
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PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen, int prf_nid,
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int keylen)
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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()))
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goto merr;
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if (!(osalt = ASN1_OCTET_STRING_new()))
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goto merr;
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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)
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saltlen = PKCS5_SALT_LEN;
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if (!(osalt->data = malloc (saltlen)))
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goto merr;
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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
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arc4random_buf(osalt->data, saltlen);
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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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goto merr;
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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()))
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goto merr;
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if (!ASN1_INTEGER_set(kdf->keylength, keylen))
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goto merr;
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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 = X509_ALGOR_new();
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if (!kdf->prf)
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goto merr;
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X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid),
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V_ASN1_NULL, NULL);
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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)
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goto merr;
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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 (!(keyfunc->parameter = ASN1_TYPE_new()))
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goto merr;
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if (!ASN1_item_pack(kdf, &PBKDF2PARAM_it,
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&keyfunc->parameter->value.sequence))
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goto merr;
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keyfunc->parameter->type = V_ASN1_SEQUENCE;
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PBKDF2PARAM_free(kdf);
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return keyfunc;
|
||
|
|
|
||
|
|
merr:
|
||
|
|
ASN1error(ERR_R_MALLOC_FAILURE);
|
||
|
|
PBKDF2PARAM_free(kdf);
|
||
|
|
X509_ALGOR_free(keyfunc);
|
||
|
|
return NULL;
|
||
|
|
}
|