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/* $OpenBSD: p5_pbev2.c,v 1.23 2015/09/30 18:41:06 jsing 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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}, |
140 |
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}; |
141 |
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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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151 |
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152 |
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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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} |
158 |
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159 |
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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); |
195 |
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if (alg_nid == NID_undef) { |
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ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, |
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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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205 |
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/* Setup the AlgorithmIdentifier for the encryption scheme */ |
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scheme = pbe2->encryption; |
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208 |
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scheme->algorithm = obj; |
209 |
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if (!(scheme->parameter = ASN1_TYPE_new())) |
210 |
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goto merr; |
211 |
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212 |
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/* Create random IV */ |
213 |
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if (EVP_CIPHER_iv_length(cipher)) { |
214 |
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if (aiv) |
215 |
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memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher)); |
216 |
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else |
217 |
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arc4random_buf(iv, EVP_CIPHER_iv_length(cipher)); |
218 |
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} |
219 |
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220 |
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EVP_CIPHER_CTX_init(&ctx); |
221 |
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222 |
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/* Dummy cipherinit to just setup the IV, and PRF */ |
223 |
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if (!EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0)) |
224 |
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goto err; |
225 |
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if (EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) { |
226 |
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ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, |
227 |
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ASN1_R_ERROR_SETTING_CIPHER_PARAMS); |
228 |
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EVP_CIPHER_CTX_cleanup(&ctx); |
229 |
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goto err; |
230 |
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} |
231 |
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/* If prf NID unspecified see if cipher has a preference. |
232 |
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* An error is OK here: just means use default PRF. |
233 |
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*/ |
234 |
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if ((prf_nid == -1) && |
235 |
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EVP_CIPHER_CTX_ctrl(&ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0) { |
236 |
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ERR_clear_error(); |
237 |
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prf_nid = NID_hmacWithSHA1; |
238 |
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} |
239 |
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EVP_CIPHER_CTX_cleanup(&ctx); |
240 |
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241 |
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/* If its RC2 then we'd better setup the key length */ |
242 |
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243 |
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if (alg_nid == NID_rc2_cbc) |
244 |
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keylen = EVP_CIPHER_key_length(cipher); |
245 |
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else |
246 |
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keylen = -1; |
247 |
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248 |
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/* Setup keyfunc */ |
249 |
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250 |
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X509_ALGOR_free(pbe2->keyfunc); |
251 |
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252 |
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pbe2->keyfunc = PKCS5_pbkdf2_set(iter, salt, saltlen, prf_nid, keylen); |
253 |
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254 |
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if (!pbe2->keyfunc) |
255 |
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goto merr; |
256 |
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257 |
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/* Now set up top level AlgorithmIdentifier */ |
258 |
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259 |
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if (!(ret = X509_ALGOR_new())) |
260 |
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goto merr; |
261 |
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if (!(ret->parameter = ASN1_TYPE_new())) |
262 |
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goto merr; |
263 |
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264 |
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ret->algorithm = OBJ_nid2obj(NID_pbes2); |
265 |
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266 |
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/* Encode PBE2PARAM into parameter */ |
267 |
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268 |
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if (!ASN1_item_pack(pbe2, ASN1_ITEM_rptr(PBE2PARAM), |
269 |
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&ret->parameter->value.sequence)) goto merr; |
270 |
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ret->parameter->type = V_ASN1_SEQUENCE; |
271 |
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272 |
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PBE2PARAM_free(pbe2); |
273 |
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pbe2 = NULL; |
274 |
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275 |
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return ret; |
276 |
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277 |
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merr: |
278 |
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ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, ERR_R_MALLOC_FAILURE); |
279 |
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|
280 |
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err: |
281 |
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PBE2PARAM_free(pbe2); |
282 |
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/* Note 'scheme' is freed as part of pbe2 */ |
283 |
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X509_ALGOR_free(kalg); |
284 |
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X509_ALGOR_free(ret); |
285 |
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|
286 |
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return NULL; |
287 |
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} |
288 |
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289 |
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X509_ALGOR * |
290 |
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PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter, unsigned char *salt, |
291 |
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int saltlen) |
292 |
|
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{ |
293 |
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return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1); |
294 |
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} |
295 |
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|
296 |
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X509_ALGOR * |
297 |
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PKCS5_pbkdf2_set(int iter, unsigned char *salt, int saltlen, int prf_nid, |
298 |
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int keylen) |
299 |
|
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{ |
300 |
|
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X509_ALGOR *keyfunc = NULL; |
301 |
|
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PBKDF2PARAM *kdf = NULL; |
302 |
|
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ASN1_OCTET_STRING *osalt = NULL; |
303 |
|
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|
304 |
|
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if (!(kdf = PBKDF2PARAM_new())) |
305 |
|
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goto merr; |
306 |
|
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if (!(osalt = ASN1_OCTET_STRING_new())) |
307 |
|
|
goto merr; |
308 |
|
|
|
309 |
|
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kdf->salt->value.octet_string = osalt; |
310 |
|
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kdf->salt->type = V_ASN1_OCTET_STRING; |
311 |
|
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|
312 |
|
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if (!saltlen) |
313 |
|
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saltlen = PKCS5_SALT_LEN; |
314 |
|
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if (!(osalt->data = malloc (saltlen))) |
315 |
|
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goto merr; |
316 |
|
|
|
317 |
|
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osalt->length = saltlen; |
318 |
|
|
|
319 |
|
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if (salt) |
320 |
|
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memcpy (osalt->data, salt, saltlen); |
321 |
|
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else |
322 |
|
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arc4random_buf(osalt->data, saltlen); |
323 |
|
|
|
324 |
|
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if (iter <= 0) |
325 |
|
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iter = PKCS5_DEFAULT_ITER; |
326 |
|
|
|
327 |
|
|
if (!ASN1_INTEGER_set(kdf->iter, iter)) |
328 |
|
|
goto merr; |
329 |
|
|
|
330 |
|
|
/* If have a key len set it up */ |
331 |
|
|
|
332 |
|
|
if (keylen > 0) { |
333 |
|
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if (!(kdf->keylength = ASN1_INTEGER_new())) |
334 |
|
|
goto merr; |
335 |
|
|
if (!ASN1_INTEGER_set(kdf->keylength, keylen)) |
336 |
|
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goto merr; |
337 |
|
|
} |
338 |
|
|
|
339 |
|
|
/* prf can stay NULL if we are using hmacWithSHA1 */ |
340 |
|
|
if (prf_nid > 0 && prf_nid != NID_hmacWithSHA1) { |
341 |
|
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kdf->prf = X509_ALGOR_new(); |
342 |
|
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if (!kdf->prf) |
343 |
|
|
goto merr; |
344 |
|
|
X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid), |
345 |
|
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V_ASN1_NULL, NULL); |
346 |
|
|
} |
347 |
|
|
|
348 |
|
|
/* Finally setup the keyfunc structure */ |
349 |
|
|
|
350 |
|
|
keyfunc = X509_ALGOR_new(); |
351 |
|
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if (!keyfunc) |
352 |
|
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goto merr; |
353 |
|
|
|
354 |
|
|
keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2); |
355 |
|
|
|
356 |
|
|
/* Encode PBKDF2PARAM into parameter of pbe2 */ |
357 |
|
|
|
358 |
|
|
if (!(keyfunc->parameter = ASN1_TYPE_new())) |
359 |
|
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goto merr; |
360 |
|
|
|
361 |
|
|
if (!ASN1_item_pack(kdf, ASN1_ITEM_rptr(PBKDF2PARAM), |
362 |
|
|
&keyfunc->parameter->value.sequence)) |
363 |
|
|
goto merr; |
364 |
|
|
keyfunc->parameter->type = V_ASN1_SEQUENCE; |
365 |
|
|
|
366 |
|
|
PBKDF2PARAM_free(kdf); |
367 |
|
|
return keyfunc; |
368 |
|
|
|
369 |
|
|
merr: |
370 |
|
|
ASN1err(ASN1_F_PKCS5_PBKDF2_SET, ERR_R_MALLOC_FAILURE); |
371 |
|
|
PBKDF2PARAM_free(kdf); |
372 |
|
|
X509_ALGOR_free(keyfunc); |
373 |
|
|
return NULL; |
374 |
|
|
} |