1 /* p5_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 "cryptlib.h" 61 #include <openssl/asn1_mac.h> 62 #include <openssl/x509.h> 63 #include <openssl/rand.h> 64 65 /* PKCS#5 password based encryption structure */ 66 67 int i2d_PBEPARAM(PBEPARAM *a, unsigned char **pp) 68 { 69 M_ASN1_I2D_vars(a); 70 M_ASN1_I2D_len (a->salt, i2d_ASN1_OCTET_STRING); 71 M_ASN1_I2D_len (a->iter, i2d_ASN1_INTEGER); 72 73 M_ASN1_I2D_seq_total (); 74 75 M_ASN1_I2D_put (a->salt, i2d_ASN1_OCTET_STRING); 76 M_ASN1_I2D_put (a->iter, i2d_ASN1_INTEGER); 77 M_ASN1_I2D_finish(); 78 } 79 80 PBEPARAM *PBEPARAM_new(void) 81 { 82 PBEPARAM *ret=NULL; 83 ASN1_CTX c; 84 M_ASN1_New_Malloc(ret, PBEPARAM); 85 M_ASN1_New(ret->iter,M_ASN1_INTEGER_new); 86 M_ASN1_New(ret->salt,M_ASN1_OCTET_STRING_new); 87 return (ret); 88 M_ASN1_New_Error(ASN1_F_PBEPARAM_NEW); 89 } 90 91 PBEPARAM *d2i_PBEPARAM(PBEPARAM **a, unsigned char **pp, long length) 92 { 93 M_ASN1_D2I_vars(a,PBEPARAM *,PBEPARAM_new); 94 M_ASN1_D2I_Init(); 95 M_ASN1_D2I_start_sequence(); 96 M_ASN1_D2I_get (ret->salt, d2i_ASN1_OCTET_STRING); 97 M_ASN1_D2I_get (ret->iter, d2i_ASN1_INTEGER); 98 M_ASN1_D2I_Finish(a, PBEPARAM_free, ASN1_F_D2I_PBEPARAM); 99 } 100 101 void PBEPARAM_free (PBEPARAM *a) 102 { 103 if(a==NULL) return; 104 M_ASN1_OCTET_STRING_free(a->salt); 105 M_ASN1_INTEGER_free (a->iter); 106 OPENSSL_free (a); 107 } 108 109 /* Return an algorithm identifier for a PKCS#5 PBE algorithm */ 110 111 X509_ALGOR *PKCS5_pbe_set(int alg, int iter, unsigned char *salt, 112 int saltlen) 113 { 114 PBEPARAM *pbe; 115 ASN1_OBJECT *al; 116 X509_ALGOR *algor; 117 ASN1_TYPE *astype; 118 119 if (!(pbe = PBEPARAM_new ())) { 120 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE); 121 return NULL; 122 } 123 if(iter <= 0) iter = PKCS5_DEFAULT_ITER; 124 ASN1_INTEGER_set (pbe->iter, iter); 125 if (!saltlen) saltlen = PKCS5_SALT_LEN; 126 if (!(pbe->salt->data = OPENSSL_malloc (saltlen))) { 127 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE); 128 return NULL; 129 } 130 pbe->salt->length = saltlen; 131 if (salt) memcpy (pbe->salt->data, salt, saltlen); 132 else if (RAND_pseudo_bytes (pbe->salt->data, saltlen) < 0) 133 return NULL; 134 135 if (!(astype = ASN1_TYPE_new())) { 136 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE); 137 return NULL; 138 } 139 140 astype->type = V_ASN1_SEQUENCE; 141 if(!ASN1_pack_string(pbe, i2d_PBEPARAM, &astype->value.sequence)) { 142 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE); 143 return NULL; 144 } 145 PBEPARAM_free (pbe); 146 147 al = OBJ_nid2obj(alg); /* never need to free al */ 148 if (!(algor = X509_ALGOR_new())) { 149 ASN1err(ASN1_F_ASN1_PBE_SET,ERR_R_MALLOC_FAILURE); 150 return NULL; 151 } 152 ASN1_OBJECT_free(algor->algorithm); 153 algor->algorithm = al; 154 algor->parameter = astype; 155 156 return (algor); 157 } 158