136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/* evp_pbe.c */
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/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
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* project 1999.
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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 <openssl/evp.h>
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#include <openssl/x509.h>
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#include "cryptlib.h"
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/* Password based encryption (PBE) functions */
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static STACK *pbe_algs;
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/* Setup a cipher context from a PBE algorithm */
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typedef struct {
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int pbe_nid;
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const EVP_CIPHER *cipher;
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const EVP_MD *md;
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EVP_PBE_KEYGEN *keygen;
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} EVP_PBE_CTL;
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int EVP_PBE_CipherInit (ASN1_OBJECT *pbe_obj, const char *pass, int passlen,
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ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int en_de)
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{
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EVP_PBE_CTL *pbetmp, pbelu;
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int i;
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pbelu.pbe_nid = OBJ_obj2nid(pbe_obj);
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if (pbelu.pbe_nid != NID_undef) i = sk_find(pbe_algs, (char *)&pbelu);
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else i = -1;
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if (i == -1) {
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char obj_tmp[80];
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EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_UNKNOWN_PBE_ALGORITHM);
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if (!pbe_obj) strcpy (obj_tmp, "NULL");
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else i2t_ASN1_OBJECT(obj_tmp, 80, pbe_obj);
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ERR_add_error_data(2, "TYPE=", obj_tmp);
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return 0;
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}
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if(!pass) passlen = 0;
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else if (passlen == -1) passlen = strlen(pass);
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pbetmp = (EVP_PBE_CTL *)sk_value (pbe_algs, i);
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i = (*pbetmp->keygen)(ctx, pass, passlen, param, pbetmp->cipher,
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pbetmp->md, en_de);
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if (!i) {
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EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_KEYGEN_FAILURE);
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return 0;
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}
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return 1;
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}
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static int pbe_cmp(const char * const *a, const char * const *b)
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{
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EVP_PBE_CTL **pbe1 = (EVP_PBE_CTL **) a, **pbe2 = (EVP_PBE_CTL **)b;
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return ((*pbe1)->pbe_nid - (*pbe2)->pbe_nid);
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}
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/* Add a PBE algorithm */
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int EVP_PBE_alg_add(int nid, const EVP_CIPHER *cipher, const EVP_MD *md,
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EVP_PBE_KEYGEN *keygen)
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{
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EVP_PBE_CTL *pbe_tmp;
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if (!pbe_algs) pbe_algs = sk_new(pbe_cmp);
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if (!(pbe_tmp = (EVP_PBE_CTL*) OPENSSL_malloc (sizeof(EVP_PBE_CTL)))) {
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EVPerr(EVP_F_EVP_PBE_ALG_ADD,ERR_R_MALLOC_FAILURE);
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return 0;
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}
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pbe_tmp->pbe_nid = nid;
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pbe_tmp->cipher = cipher;
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pbe_tmp->md = md;
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pbe_tmp->keygen = keygen;
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sk_push (pbe_algs, (char *)pbe_tmp);
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return 1;
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}
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void EVP_PBE_cleanup(void)
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{
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sk_pop_free(pbe_algs, OPENSSL_freeFunc);
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pbe_algs = NULL;
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}
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