evp_pbe.c revision 55714
1/* evp_pbe.c */ 2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL 3 * project 1999. 4 */ 5/* ==================================================================== 6 * Copyright (c) 1999 The OpenSSL Project. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * 3. All advertising materials mentioning features or use of this 21 * software must display the following acknowledgment: 22 * "This product includes software developed by the OpenSSL Project 23 * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" 24 * 25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to 26 * endorse or promote products derived from this software without 27 * prior written permission. For written permission, please contact 28 * licensing@OpenSSL.org. 29 * 30 * 5. Products derived from this software may not be called "OpenSSL" 31 * nor may "OpenSSL" appear in their names without prior written 32 * permission of the OpenSSL Project. 33 * 34 * 6. Redistributions of any form whatsoever must retain the following 35 * acknowledgment: 36 * "This product includes software developed by the OpenSSL Project 37 * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" 38 * 39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY 40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 42 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR 43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 50 * OF THE POSSIBILITY OF SUCH DAMAGE. 51 * ==================================================================== 52 * 53 * This product includes cryptographic software written by Eric Young 54 * (eay@cryptsoft.com). This product includes software written by Tim 55 * Hudson (tjh@cryptsoft.com). 56 * 57 */ 58 59#include <stdio.h> 60#include <openssl/evp.h> 61#include <openssl/x509.h> 62#include "cryptlib.h" 63 64/* Password based encryption (PBE) functions */ 65 66static STACK *pbe_algs; 67 68/* Setup a cipher context from a PBE algorithm */ 69 70typedef struct { 71int pbe_nid; 72EVP_CIPHER *cipher; 73EVP_MD *md; 74EVP_PBE_KEYGEN *keygen; 75} EVP_PBE_CTL; 76 77int EVP_PBE_CipherInit (ASN1_OBJECT *pbe_obj, const char *pass, int passlen, 78 ASN1_TYPE *param, EVP_CIPHER_CTX *ctx, int en_de) 79{ 80 81 EVP_PBE_CTL *pbetmp, pbelu; 82 int i; 83 pbelu.pbe_nid = OBJ_obj2nid(pbe_obj); 84 if (pbelu.pbe_nid != NID_undef) i = sk_find(pbe_algs, (char *)&pbelu); 85 else i = -1; 86 87 if (i == -1) { 88 char obj_tmp[80]; 89 EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_UNKNOWN_PBE_ALGORITHM); 90 if (!pbe_obj) strcpy (obj_tmp, "NULL"); 91 else i2t_ASN1_OBJECT(obj_tmp, 80, pbe_obj); 92 ERR_add_error_data(2, "TYPE=", obj_tmp); 93 return 0; 94 } 95 if (passlen == -1) passlen = strlen(pass); 96 pbetmp = (EVP_PBE_CTL *)sk_value (pbe_algs, i); 97 i = (*pbetmp->keygen)(ctx, pass, passlen, param, pbetmp->cipher, 98 pbetmp->md, en_de); 99 if (!i) { 100 EVPerr(EVP_F_EVP_PBE_CIPHERINIT,EVP_R_KEYGEN_FAILURE); 101 return 0; 102 } 103 return 1; 104} 105 106static int pbe_cmp (EVP_PBE_CTL **pbe1, EVP_PBE_CTL **pbe2) 107{ 108 return ((*pbe1)->pbe_nid - (*pbe2)->pbe_nid); 109} 110 111/* Add a PBE algorithm */ 112 113int EVP_PBE_alg_add (int nid, EVP_CIPHER *cipher, EVP_MD *md, 114 EVP_PBE_KEYGEN *keygen) 115{ 116 EVP_PBE_CTL *pbe_tmp; 117 if (!pbe_algs) pbe_algs = sk_new (pbe_cmp); 118 if (!(pbe_tmp = (EVP_PBE_CTL*) Malloc (sizeof(EVP_PBE_CTL)))) { 119 EVPerr(EVP_F_EVP_PBE_ALG_ADD,ERR_R_MALLOC_FAILURE); 120 return 0; 121 } 122 pbe_tmp->pbe_nid = nid; 123 pbe_tmp->cipher = cipher; 124 pbe_tmp->md = md; 125 pbe_tmp->keygen = keygen; 126 sk_push (pbe_algs, (char *)pbe_tmp); 127 return 1; 128} 129 130void EVP_PBE_cleanup(void) 131{ 132 sk_pop_free(pbe_algs, FreeFunc); 133 pbe_algs = NULL; 134} 135