Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* crypto/asn1/n_pkey.c */ |
| 2 | /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This package is an SSL implementation written |
| 6 | * by Eric Young (eay@cryptsoft.com). |
| 7 | * The implementation was written so as to conform with Netscapes SSL. |
| 8 | * |
| 9 | * This library is free for commercial and non-commercial use as long as |
| 10 | * the following conditions are aheared to. The following conditions |
| 11 | * apply to all code found in this distribution, be it the RC4, RSA, |
| 12 | * lhash, DES, etc., code; not just the SSL code. The SSL documentation |
| 13 | * included with this distribution is covered by the same copyright terms |
| 14 | * except that the holder is Tim Hudson (tjh@cryptsoft.com). |
| 15 | * |
| 16 | * Copyright remains Eric Young's, and as such any Copyright notices in |
| 17 | * the code are not to be removed. |
| 18 | * If this package is used in a product, Eric Young should be given attribution |
| 19 | * as the author of the parts of the library used. |
| 20 | * This can be in the form of a textual message at program startup or |
| 21 | * in documentation (online or textual) provided with the package. |
| 22 | * |
| 23 | * Redistribution and use in source and binary forms, with or without |
| 24 | * modification, are permitted provided that the following conditions |
| 25 | * are met: |
| 26 | * 1. Redistributions of source code must retain the copyright |
| 27 | * notice, this list of conditions and the following disclaimer. |
| 28 | * 2. Redistributions in binary form must reproduce the above copyright |
| 29 | * notice, this list of conditions and the following disclaimer in the |
| 30 | * documentation and/or other materials provided with the distribution. |
| 31 | * 3. All advertising materials mentioning features or use of this software |
| 32 | * must display the following acknowledgement: |
| 33 | * "This product includes cryptographic software written by |
| 34 | * Eric Young (eay@cryptsoft.com)" |
| 35 | * The word 'cryptographic' can be left out if the rouines from the library |
| 36 | * being used are not cryptographic related :-). |
| 37 | * 4. If you include any Windows specific code (or a derivative thereof) from |
| 38 | * the apps directory (application code) you must include an acknowledgement: |
| 39 | * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" |
| 40 | * |
| 41 | * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND |
| 42 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 43 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 44 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE |
| 45 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 46 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 47 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 49 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 50 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 51 | * SUCH DAMAGE. |
| 52 | * |
| 53 | * The licence and distribution terms for any publically available version or |
| 54 | * derivative of this code cannot be changed. i.e. this code cannot simply be |
| 55 | * copied and put under another distribution licence |
| 56 | * [including the GNU Public Licence.] |
| 57 | */ |
| 58 | |
| 59 | #include <stdio.h> |
| 60 | #include "cryptlib.h" |
| 61 | #ifndef OPENSSL_NO_RSA |
| 62 | #include <openssl/rsa.h> |
| 63 | #include <openssl/objects.h> |
| 64 | #include <openssl/asn1t.h> |
| 65 | #include <openssl/asn1_mac.h> |
| 66 | #include <openssl/evp.h> |
| 67 | #include <openssl/x509.h> |
| 68 | |
| 69 | |
| 70 | #ifndef OPENSSL_NO_RC4 |
| 71 | |
| 72 | typedef struct netscape_pkey_st |
| 73 | { |
| 74 | long version; |
| 75 | X509_ALGOR *algor; |
| 76 | ASN1_OCTET_STRING *private_key; |
| 77 | } NETSCAPE_PKEY; |
| 78 | |
| 79 | typedef struct netscape_encrypted_pkey_st |
| 80 | { |
| 81 | ASN1_OCTET_STRING *os; |
| 82 | /* This is the same structure as DigestInfo so use it: |
| 83 | * although this isn't really anything to do with |
| 84 | * digests. |
| 85 | */ |
| 86 | X509_SIG *enckey; |
| 87 | } NETSCAPE_ENCRYPTED_PKEY; |
| 88 | |
| 89 | |
| 90 | ASN1_BROKEN_SEQUENCE(NETSCAPE_ENCRYPTED_PKEY) = { |
| 91 | ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, os, ASN1_OCTET_STRING), |
| 92 | ASN1_SIMPLE(NETSCAPE_ENCRYPTED_PKEY, enckey, X509_SIG) |
| 93 | } ASN1_BROKEN_SEQUENCE_END(NETSCAPE_ENCRYPTED_PKEY) |
| 94 | |
| 95 | DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY) |
| 96 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY,NETSCAPE_ENCRYPTED_PKEY) |
| 97 | IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_ENCRYPTED_PKEY) |
| 98 | |
| 99 | ASN1_SEQUENCE(NETSCAPE_PKEY) = { |
| 100 | ASN1_SIMPLE(NETSCAPE_PKEY, version, LONG), |
| 101 | ASN1_SIMPLE(NETSCAPE_PKEY, algor, X509_ALGOR), |
| 102 | ASN1_SIMPLE(NETSCAPE_PKEY, private_key, ASN1_OCTET_STRING) |
| 103 | } ASN1_SEQUENCE_END(NETSCAPE_PKEY) |
| 104 | |
| 105 | DECLARE_ASN1_FUNCTIONS_const(NETSCAPE_PKEY) |
| 106 | DECLARE_ASN1_ENCODE_FUNCTIONS_const(NETSCAPE_PKEY,NETSCAPE_PKEY) |
| 107 | IMPLEMENT_ASN1_FUNCTIONS_const(NETSCAPE_PKEY) |
| 108 | |
| 109 | static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, |
| 110 | int (*cb)(char *buf, int len, const char *prompt, |
| 111 | int verify), |
| 112 | int sgckey); |
| 113 | |
| 114 | int i2d_Netscape_RSA(const RSA *a, unsigned char **pp, |
| 115 | int (*cb)(char *buf, int len, const char *prompt, |
| 116 | int verify)) |
| 117 | { |
| 118 | return i2d_RSA_NET(a, pp, cb, 0); |
| 119 | } |
| 120 | |
| 121 | int i2d_RSA_NET(const RSA *a, unsigned char **pp, |
| 122 | int (*cb)(char *buf, int len, const char *prompt, int verify), |
| 123 | int sgckey) |
| 124 | { |
| 125 | int i, j, ret = 0; |
| 126 | int rsalen, pkeylen, olen; |
| 127 | NETSCAPE_PKEY *pkey = NULL; |
| 128 | NETSCAPE_ENCRYPTED_PKEY *enckey = NULL; |
| 129 | unsigned char buf[256],*zz; |
| 130 | unsigned char key[EVP_MAX_KEY_LENGTH]; |
| 131 | EVP_CIPHER_CTX ctx; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 132 | |
| 133 | if (a == NULL) return(0); |
| 134 | |
| 135 | if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err; |
| 136 | if ((enckey=NETSCAPE_ENCRYPTED_PKEY_new()) == NULL) goto err; |
| 137 | pkey->version = 0; |
| 138 | |
| 139 | pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption); |
| 140 | if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err; |
| 141 | pkey->algor->parameter->type=V_ASN1_NULL; |
| 142 | |
| 143 | rsalen = i2d_RSAPrivateKey(a, NULL); |
| 144 | |
| 145 | /* Fake some octet strings just for the initial length |
| 146 | * calculation. |
| 147 | */ |
| 148 | |
| 149 | pkey->private_key->length=rsalen; |
| 150 | |
| 151 | pkeylen=i2d_NETSCAPE_PKEY(pkey,NULL); |
| 152 | |
| 153 | enckey->enckey->digest->length = pkeylen; |
| 154 | |
| 155 | enckey->os->length = 11; /* "private-key" */ |
| 156 | |
| 157 | enckey->enckey->algor->algorithm=OBJ_nid2obj(NID_rc4); |
| 158 | if ((enckey->enckey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err; |
| 159 | enckey->enckey->algor->parameter->type=V_ASN1_NULL; |
| 160 | |
| 161 | if (pp == NULL) |
| 162 | { |
| 163 | olen = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, NULL); |
| 164 | NETSCAPE_PKEY_free(pkey); |
| 165 | NETSCAPE_ENCRYPTED_PKEY_free(enckey); |
| 166 | return olen; |
| 167 | } |
| 168 | |
| 169 | |
| 170 | /* Since its RC4 encrypted length is actual length */ |
| 171 | if ((zz=(unsigned char *)OPENSSL_malloc(rsalen)) == NULL) |
| 172 | { |
| 173 | ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE); |
| 174 | goto err; |
| 175 | } |
| 176 | |
| 177 | pkey->private_key->data = zz; |
| 178 | /* Write out private key encoding */ |
| 179 | i2d_RSAPrivateKey(a,&zz); |
| 180 | |
| 181 | if ((zz=OPENSSL_malloc(pkeylen)) == NULL) |
| 182 | { |
| 183 | ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE); |
| 184 | goto err; |
| 185 | } |
| 186 | |
| 187 | if (!ASN1_STRING_set(enckey->os, "private-key", -1)) |
| 188 | { |
| 189 | ASN1err(ASN1_F_I2D_RSA_NET,ERR_R_MALLOC_FAILURE); |
| 190 | goto err; |
| 191 | } |
| 192 | enckey->enckey->digest->data = zz; |
| 193 | i2d_NETSCAPE_PKEY(pkey,&zz); |
| 194 | |
| 195 | /* Wipe the private key encoding */ |
| 196 | OPENSSL_cleanse(pkey->private_key->data, rsalen); |
| 197 | |
| 198 | if (cb == NULL) |
| 199 | cb=EVP_read_pw_string; |
| 200 | i=cb((char *)buf,256,"Enter Private Key password:",1); |
| 201 | if (i != 0) |
| 202 | { |
| 203 | ASN1err(ASN1_F_I2D_RSA_NET,ASN1_R_BAD_PASSWORD_READ); |
| 204 | goto err; |
| 205 | } |
| 206 | i = strlen((char *)buf); |
| 207 | /* If the key is used for SGC the algorithm is modified a little. */ |
| 208 | if(sgckey) { |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 209 | EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 210 | memcpy(buf + 16, "SGCKEYSALT", 10); |
| 211 | i = 26; |
| 212 | } |
| 213 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 214 | EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 215 | OPENSSL_cleanse(buf,256); |
| 216 | |
| 217 | /* Encrypt private key in place */ |
| 218 | zz = enckey->enckey->digest->data; |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 219 | EVP_CIPHER_CTX_init(&ctx); |
| 220 | EVP_EncryptInit_ex(&ctx,EVP_rc4(),NULL,key,NULL); |
| 221 | EVP_EncryptUpdate(&ctx,zz,&i,zz,pkeylen); |
| 222 | EVP_EncryptFinal_ex(&ctx,zz + i,&j); |
| 223 | EVP_CIPHER_CTX_cleanup(&ctx); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 224 | |
| 225 | ret = i2d_NETSCAPE_ENCRYPTED_PKEY(enckey, pp); |
| 226 | err: |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 227 | NETSCAPE_ENCRYPTED_PKEY_free(enckey); |
| 228 | NETSCAPE_PKEY_free(pkey); |
| 229 | return(ret); |
| 230 | } |
| 231 | |
| 232 | |
| 233 | RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, |
| 234 | int (*cb)(char *buf, int len, const char *prompt, |
| 235 | int verify)) |
| 236 | { |
| 237 | return d2i_RSA_NET(a, pp, length, cb, 0); |
| 238 | } |
| 239 | |
| 240 | RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, |
| 241 | int (*cb)(char *buf, int len, const char *prompt, int verify), |
| 242 | int sgckey) |
| 243 | { |
| 244 | RSA *ret=NULL; |
| 245 | const unsigned char *p; |
| 246 | NETSCAPE_ENCRYPTED_PKEY *enckey = NULL; |
| 247 | |
| 248 | p = *pp; |
| 249 | |
| 250 | enckey = d2i_NETSCAPE_ENCRYPTED_PKEY(NULL, &p, length); |
| 251 | if(!enckey) { |
| 252 | ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_DECODING_ERROR); |
| 253 | return NULL; |
| 254 | } |
| 255 | |
| 256 | if ((enckey->os->length != 11) || (strncmp("private-key", |
| 257 | (char *)enckey->os->data,11) != 0)) |
| 258 | { |
| 259 | ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_PRIVATE_KEY_HEADER_MISSING); |
| 260 | NETSCAPE_ENCRYPTED_PKEY_free(enckey); |
| 261 | return NULL; |
| 262 | } |
| 263 | if (OBJ_obj2nid(enckey->enckey->algor->algorithm) != NID_rc4) |
| 264 | { |
| 265 | ASN1err(ASN1_F_D2I_RSA_NET,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM); |
| 266 | goto err; |
| 267 | } |
| 268 | if (cb == NULL) |
| 269 | cb=EVP_read_pw_string; |
| 270 | if ((ret=d2i_RSA_NET_2(a, enckey->enckey->digest,cb, sgckey)) == NULL) goto err; |
| 271 | |
| 272 | *pp = p; |
| 273 | |
| 274 | err: |
| 275 | NETSCAPE_ENCRYPTED_PKEY_free(enckey); |
| 276 | return ret; |
| 277 | |
| 278 | } |
| 279 | |
| 280 | static RSA *d2i_RSA_NET_2(RSA **a, ASN1_OCTET_STRING *os, |
| 281 | int (*cb)(char *buf, int len, const char *prompt, |
| 282 | int verify), int sgckey) |
| 283 | { |
| 284 | NETSCAPE_PKEY *pkey=NULL; |
| 285 | RSA *ret=NULL; |
| 286 | int i,j; |
| 287 | unsigned char buf[256]; |
| 288 | const unsigned char *zz; |
| 289 | unsigned char key[EVP_MAX_KEY_LENGTH]; |
| 290 | EVP_CIPHER_CTX ctx; |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 291 | |
| 292 | i=cb((char *)buf,256,"Enter Private Key password:",0); |
| 293 | if (i != 0) |
| 294 | { |
| 295 | ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_BAD_PASSWORD_READ); |
| 296 | goto err; |
| 297 | } |
| 298 | |
| 299 | i = strlen((char *)buf); |
| 300 | if(sgckey){ |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 301 | EVP_Digest(buf, i, buf, NULL, EVP_md5(), NULL); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 302 | memcpy(buf + 16, "SGCKEYSALT", 10); |
| 303 | i = 26; |
| 304 | } |
| 305 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 306 | EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 307 | OPENSSL_cleanse(buf,256); |
| 308 | |
Alexandre Savard | 7541067 | 2012-08-08 09:50:01 -0400 | [diff] [blame] | 309 | EVP_CIPHER_CTX_init(&ctx); |
| 310 | EVP_DecryptInit_ex(&ctx,EVP_rc4(),NULL, key,NULL); |
| 311 | EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length); |
| 312 | EVP_DecryptFinal_ex(&ctx,&(os->data[i]),&j); |
| 313 | EVP_CIPHER_CTX_cleanup(&ctx); |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 314 | os->length=i+j; |
| 315 | |
| 316 | zz=os->data; |
| 317 | |
| 318 | if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL) |
| 319 | { |
| 320 | ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY); |
| 321 | goto err; |
| 322 | } |
| 323 | |
| 324 | zz=pkey->private_key->data; |
| 325 | if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL) |
| 326 | { |
| 327 | ASN1err(ASN1_F_D2I_RSA_NET_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY); |
| 328 | goto err; |
| 329 | } |
| 330 | err: |
Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 331 | NETSCAPE_PKEY_free(pkey); |
| 332 | return(ret); |
| 333 | } |
| 334 | |
| 335 | #endif /* OPENSSL_NO_RC4 */ |
| 336 | |
| 337 | #else /* !OPENSSL_NO_RSA */ |
| 338 | |
| 339 | # if PEDANTIC |
| 340 | static void *dummy=&dummy; |
| 341 | # endif |
| 342 | |
| 343 | #endif |