evp_pbe.c
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- /* evp_pbe.c */
- /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 1999.
- */
- /* ====================================================================
- * Copyright (c) 1999 The OpenSSL Project. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
- #include <stdio.h>
- #include "cryptlib.h"
- #include <openssl/evp.h>
- #include <openssl/x509.h>
- /* Password based encryption (PBE) functions */
- static STACK *pbe_algs;
- /* Setup a cipher context from a PBE algorithm */
- typedef struct {
- int pbe_nid;
- const EVP_CIPHER *cipher;
- const EVP_MD *md;
- EVP_PBE_KEYGEN *keygen;
- } EVP_PBE_CTL;
- int EVP_PBE_CipherInit(ASN1_OBJECT *pbe_obj, const char *pass, int passlen,
- ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int en_de)
- {
- EVP_PBE_CTL *pbetmp, pbelu;
- int i;
- pbelu.pbe_nid = OBJ_obj2nid(pbe_obj);
- if (pbelu.pbe_nid != NID_undef) i = sk_find(pbe_algs, (char *)&pbelu);
- else i = -1;
- if (i == -1) {
- char obj_tmp[80];
- EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_UNKNOWN_PBE_ALGORITHM);
- if (!pbe_obj) BUF_strlcpy (obj_tmp, "NULL", sizeof obj_tmp);
- else i2t_ASN1_OBJECT(obj_tmp, sizeof obj_tmp, pbe_obj);
- ERR_add_error_data(2, "TYPE=", obj_tmp);
- return 0;
- }
- if(!pass) passlen = 0;
- else if (passlen == -1) passlen = strlen(pass);
- pbetmp = (EVP_PBE_CTL *)sk_value (pbe_algs, i);
- i = (*pbetmp->keygen)(ctx, pass, passlen, param, pbetmp->cipher,
- pbetmp->md, en_de);
- if (!i) {
- EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_KEYGEN_FAILURE);
- return 0;
- }
- return 1;
- }
- static int pbe_cmp(const char * const *a, const char * const *b)
- {
- const EVP_PBE_CTL * const *pbe1 = (const EVP_PBE_CTL * const *) a,
- * const *pbe2 = (const EVP_PBE_CTL * const *)b;
- return ((*pbe1)->pbe_nid - (*pbe2)->pbe_nid);
- }
- /* Add a PBE algorithm */
- int EVP_PBE_alg_add(int nid, const EVP_CIPHER *cipher, const EVP_MD *md,
- EVP_PBE_KEYGEN *keygen)
- {
- EVP_PBE_CTL *pbe_tmp;
- if (!pbe_algs) pbe_algs = sk_new(pbe_cmp);
- if (!(pbe_tmp = (EVP_PBE_CTL*) OPENSSL_malloc (sizeof(EVP_PBE_CTL)))) {
- EVPerr(EVP_F_EVP_PBE_ALG_ADD,ERR_R_MALLOC_FAILURE);
- return 0;
- }
- pbe_tmp->pbe_nid = nid;
- pbe_tmp->cipher = cipher;
- pbe_tmp->md = md;
- pbe_tmp->keygen = keygen;
- sk_push (pbe_algs, (char *)pbe_tmp);
- return 1;
- }
- void EVP_PBE_cleanup(void)
- {
- sk_pop_free(pbe_algs, OPENSSL_freeFunc);
- pbe_algs = NULL;
- }