Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* p5_pbev2.c */ |
| 2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
| 3 | * project 1999-2004. |
| 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/asn1t.h> |
| 62 | #include <openssl/x509.h> |
| 63 | #include <openssl/rand.h> |
| 64 | |
| 65 | /* PKCS#5 v2.0 password based encryption structures */ |
| 66 | |
| 67 | ASN1_SEQUENCE(PBE2PARAM) = { |
| 68 | ASN1_SIMPLE(PBE2PARAM, keyfunc, X509_ALGOR), |
| 69 | ASN1_SIMPLE(PBE2PARAM, encryption, X509_ALGOR) |
| 70 | } ASN1_SEQUENCE_END(PBE2PARAM) |
| 71 | |
| 72 | IMPLEMENT_ASN1_FUNCTIONS(PBE2PARAM) |
| 73 | |
| 74 | ASN1_SEQUENCE(PBKDF2PARAM) = { |
| 75 | ASN1_SIMPLE(PBKDF2PARAM, salt, ASN1_ANY), |
| 76 | ASN1_SIMPLE(PBKDF2PARAM, iter, ASN1_INTEGER), |
| 77 | ASN1_OPT(PBKDF2PARAM, keylength, ASN1_INTEGER), |
| 78 | ASN1_OPT(PBKDF2PARAM, prf, X509_ALGOR) |
| 79 | } ASN1_SEQUENCE_END(PBKDF2PARAM) |
| 80 | |
| 81 | IMPLEMENT_ASN1_FUNCTIONS(PBKDF2PARAM) |
| 82 | |
| 83 | /* Return an algorithm identifier for a PKCS#5 v2.0 PBE algorithm: |
| 84 | * yes I know this is horrible! |
| 85 | * |
| 86 | * Extended version to allow application supplied PRF NID and IV. |
| 87 | */ |
| 88 | |
| 89 | X509_ALGOR *PKCS5_pbe2_set_iv(const EVP_CIPHER *cipher, int iter, |
| 90 | unsigned char *salt, int saltlen, |
| 91 | unsigned char *aiv, int prf_nid) |
| 92 | { |
| 93 | X509_ALGOR *scheme = NULL, *kalg = NULL, *ret = NULL; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 94 | int alg_nid; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 95 | EVP_CIPHER_CTX ctx; |
| 96 | unsigned char iv[EVP_MAX_IV_LENGTH]; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 97 | PBKDF2PARAM *kdf = NULL; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 98 | PBE2PARAM *pbe2 = NULL; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 99 | ASN1_OCTET_STRING *osalt = NULL; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 100 | ASN1_OBJECT *obj; |
| 101 | |
| 102 | alg_nid = EVP_CIPHER_type(cipher); |
| 103 | if(alg_nid == NID_undef) { |
| 104 | ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, |
| 105 | ASN1_R_CIPHER_HAS_NO_OBJECT_IDENTIFIER); |
| 106 | goto err; |
| 107 | } |
| 108 | obj = OBJ_nid2obj(alg_nid); |
| 109 | |
| 110 | if(!(pbe2 = PBE2PARAM_new())) goto merr; |
| 111 | |
| 112 | /* Setup the AlgorithmIdentifier for the encryption scheme */ |
| 113 | scheme = pbe2->encryption; |
| 114 | |
| 115 | scheme->algorithm = obj; |
| 116 | if(!(scheme->parameter = ASN1_TYPE_new())) goto merr; |
| 117 | |
| 118 | /* Create random IV */ |
| 119 | if (EVP_CIPHER_iv_length(cipher)) |
| 120 | { |
| 121 | if (aiv) |
| 122 | memcpy(iv, aiv, EVP_CIPHER_iv_length(cipher)); |
| 123 | else if (RAND_pseudo_bytes(iv, EVP_CIPHER_iv_length(cipher)) < 0) |
| 124 | goto err; |
| 125 | } |
| 126 | |
| 127 | EVP_CIPHER_CTX_init(&ctx); |
| 128 | |
| 129 | /* Dummy cipherinit to just setup the IV, and PRF */ |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 130 | EVP_CipherInit_ex(&ctx, cipher, NULL, NULL, iv, 0); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 131 | if(EVP_CIPHER_param_to_asn1(&ctx, scheme->parameter) < 0) { |
| 132 | ASN1err(ASN1_F_PKCS5_PBE2_SET_IV, |
| 133 | ASN1_R_ERROR_SETTING_CIPHER_PARAMS); |
| 134 | EVP_CIPHER_CTX_cleanup(&ctx); |
| 135 | goto err; |
| 136 | } |
| 137 | /* If prf NID unspecified see if cipher has a preference. |
| 138 | * An error is OK here: just means use default PRF. |
| 139 | */ |
| 140 | if ((prf_nid == -1) && |
| 141 | EVP_CIPHER_CTX_ctrl(&ctx, EVP_CTRL_PBE_PRF_NID, 0, &prf_nid) <= 0) |
| 142 | { |
| 143 | ERR_clear_error(); |
| 144 | prf_nid = NID_hmacWithSHA1; |
| 145 | } |
| 146 | EVP_CIPHER_CTX_cleanup(&ctx); |
| 147 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 148 | if(!(kdf = PBKDF2PARAM_new())) goto merr; |
| 149 | if(!(osalt = M_ASN1_OCTET_STRING_new())) goto merr; |
| 150 | |
| 151 | if (!saltlen) saltlen = PKCS5_SALT_LEN; |
| 152 | if (!(osalt->data = OPENSSL_malloc (saltlen))) goto merr; |
| 153 | osalt->length = saltlen; |
| 154 | if (salt) memcpy (osalt->data, salt, saltlen); |
| 155 | else if (RAND_pseudo_bytes (osalt->data, saltlen) < 0) goto merr; |
| 156 | |
| 157 | if(iter <= 0) iter = PKCS5_DEFAULT_ITER; |
| 158 | if(!ASN1_INTEGER_set(kdf->iter, iter)) goto merr; |
| 159 | |
| 160 | /* Now include salt in kdf structure */ |
| 161 | kdf->salt->value.octet_string = osalt; |
| 162 | kdf->salt->type = V_ASN1_OCTET_STRING; |
| 163 | osalt = NULL; |
| 164 | |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 165 | /* If its RC2 then we'd better setup the key length */ |
| 166 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 167 | if(alg_nid == NID_rc2_cbc) { |
| 168 | if(!(kdf->keylength = M_ASN1_INTEGER_new())) goto merr; |
| 169 | if(!ASN1_INTEGER_set (kdf->keylength, |
| 170 | EVP_CIPHER_key_length(cipher))) goto merr; |
| 171 | } |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 172 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 173 | /* prf can stay NULL if we are using hmacWithSHA1 */ |
| 174 | if (prf_nid != NID_hmacWithSHA1) |
| 175 | { |
| 176 | kdf->prf = X509_ALGOR_new(); |
| 177 | if (!kdf->prf) |
| 178 | goto merr; |
| 179 | X509_ALGOR_set0(kdf->prf, OBJ_nid2obj(prf_nid), |
| 180 | V_ASN1_NULL, NULL); |
| 181 | } |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 182 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 183 | /* Now setup the PBE2PARAM keyfunc structure */ |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 184 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 185 | pbe2->keyfunc->algorithm = OBJ_nid2obj(NID_id_pbkdf2); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 186 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 187 | /* Encode PBKDF2PARAM into parameter of pbe2 */ |
| 188 | |
| 189 | if(!(pbe2->keyfunc->parameter = ASN1_TYPE_new())) goto merr; |
| 190 | |
| 191 | if(!ASN1_item_pack(kdf, ASN1_ITEM_rptr(PBKDF2PARAM), |
| 192 | &pbe2->keyfunc->parameter->value.sequence)) goto merr; |
| 193 | pbe2->keyfunc->parameter->type = V_ASN1_SEQUENCE; |
| 194 | |
| 195 | PBKDF2PARAM_free(kdf); |
| 196 | kdf = NULL; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 197 | |
| 198 | /* Now set up top level AlgorithmIdentifier */ |
| 199 | |
| 200 | if(!(ret = X509_ALGOR_new())) goto merr; |
| 201 | if(!(ret->parameter = ASN1_TYPE_new())) goto merr; |
| 202 | |
| 203 | ret->algorithm = OBJ_nid2obj(NID_pbes2); |
| 204 | |
| 205 | /* Encode PBE2PARAM into parameter */ |
| 206 | |
| 207 | if(!ASN1_item_pack(pbe2, ASN1_ITEM_rptr(PBE2PARAM), |
| 208 | &ret->parameter->value.sequence)) goto merr; |
| 209 | ret->parameter->type = V_ASN1_SEQUENCE; |
| 210 | |
| 211 | PBE2PARAM_free(pbe2); |
| 212 | pbe2 = NULL; |
| 213 | |
| 214 | return ret; |
| 215 | |
| 216 | merr: |
| 217 | ASN1err(ASN1_F_PKCS5_PBE2_SET_IV,ERR_R_MALLOC_FAILURE); |
| 218 | |
| 219 | err: |
| 220 | PBE2PARAM_free(pbe2); |
| 221 | /* Note 'scheme' is freed as part of pbe2 */ |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 222 | M_ASN1_OCTET_STRING_free(osalt); |
| 223 | PBKDF2PARAM_free(kdf); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 224 | X509_ALGOR_free(kalg); |
| 225 | X509_ALGOR_free(ret); |
| 226 | |
| 227 | return NULL; |
| 228 | |
| 229 | } |
| 230 | |
| 231 | X509_ALGOR *PKCS5_pbe2_set(const EVP_CIPHER *cipher, int iter, |
| 232 | unsigned char *salt, int saltlen) |
| 233 | { |
| 234 | return PKCS5_pbe2_set_iv(cipher, iter, salt, saltlen, NULL, -1); |
| 235 | } |