crypto/asn1/n_pkey.c

   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 #ifndef NO_RSA
  60 #include <stdio.h>
  61 #include "cryptlib.h"
  62 #include <openssl/rsa.h>
  63 #include <openssl/objects.h>
  64 #include <openssl/asn1_mac.h>
  65 #include <openssl/evp.h>
  66 #include <openssl/x509.h>
  67
  68
  69 #ifndef NO_RC4
  70
  71 typedef struct netscape_pkey_st
  72         {
  73         ASN1_INTEGER *version;
  74         X509_ALGOR *algor;
  75         ASN1_OCTET_STRING *private_key;
  76         } NETSCAPE_PKEY;
  77
  78 static int i2d_NETSCAPE_PKEY(NETSCAPE_PKEY *a, unsigned char **pp);
  79 static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a,unsigned char **pp, long length);
  80 static NETSCAPE_PKEY *NETSCAPE_PKEY_new(void);
  81 static void NETSCAPE_PKEY_free(NETSCAPE_PKEY *);
  82
  83 int i2d_Netscape_RSA(const RSA *a, unsigned char **pp, int (*cb)())
  84 {
  85         return i2d_RSA_NET(a, pp, cb, 0);
  86 }
  87
  88 int i2d_RSA_NET(const RSA *a, unsigned char **pp, int (*cb)(), int sgckey)
  89         {
  90         int i,j,l[6];
  91         NETSCAPE_PKEY *pkey;
  92         unsigned char buf[256],*zz;
  93         unsigned char key[EVP_MAX_KEY_LENGTH];
  94         EVP_CIPHER_CTX ctx;
  95         X509_ALGOR *alg=NULL;
  96         ASN1_OCTET_STRING os,os2;
  97         M_ASN1_I2D_vars(a);
  98
  99         if (a == NULL) return(0);
 100
 101 #ifdef WIN32
 102         r=r; /* shut the damn compiler up :-) */
 103 #endif
 104
 105         os.data=os2.data=NULL;
 106         if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err;
 107         if (!ASN1_INTEGER_set(pkey->version,0)) goto err;
 108
 109         if (pkey->algor->algorithm != NULL)
 110                 ASN1_OBJECT_free(pkey->algor->algorithm);
 111         pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption);
 112         if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
 113         pkey->algor->parameter->type=V_ASN1_NULL;
 114
 115         l[0]=i2d_RSAPrivateKey(a,NULL);
 116         pkey->private_key->length=l[0];
 117
 118         os2.length=i2d_NETSCAPE_PKEY(pkey,NULL);
 119         l[1]=i2d_ASN1_OCTET_STRING(&os2,NULL);
 120
 121         if ((alg=X509_ALGOR_new()) == NULL) goto err;
 122         if (alg->algorithm != NULL)
 123                 ASN1_OBJECT_free(alg->algorithm);
 124         alg->algorithm=OBJ_nid2obj(NID_rc4);
 125         if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err;
 126         alg->parameter->type=V_ASN1_NULL;
 127
 128         l[2]=i2d_X509_ALGOR(alg,NULL);
 129         l[3]=ASN1_object_size(1,l[2]+l[1],V_ASN1_SEQUENCE);
 130
 131 #ifndef CONST_STRICT
 132         os.data=(unsigned char *)"private-key";
 133 #endif
 134         os.length=11;
 135         l[4]=i2d_ASN1_OCTET_STRING(&os,NULL);
 136
 137         l[5]=ASN1_object_size(1,l[4]+l[3],V_ASN1_SEQUENCE);
 138
 139         if (pp == NULL)
 140                 {
 141                 if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 142                 if (alg != NULL) X509_ALGOR_free(alg);
 143                 return(l[5]);
 144                 }
 145
 146         if (pkey->private_key->data != NULL)
 147                 OPENSSL_free(pkey->private_key->data);
 148         if ((pkey->private_key->data=(unsigned char *)OPENSSL_malloc(l[0])) == NULL)
 149                 {
 150                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
 151                 goto err;
 152                 }
 153         zz=pkey->private_key->data;
 154         i2d_RSAPrivateKey(a,&zz);
 155
 156         if ((os2.data=(unsigned char *)OPENSSL_malloc(os2.length)) == NULL)
 157                 {
 158                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
 159                 goto err;
 160                 }
 161         zz=os2.data;
 162         i2d_NETSCAPE_PKEY(pkey,&zz);
 163
 164         if (cb == NULL)
 165                 cb=EVP_read_pw_string;
 166         i=cb(buf,256,"Enter Private Key password:",1);
 167         if (i != 0)
 168                 {
 169                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ASN1_R_BAD_PASSWORD_READ);
 170                 goto err;
 171                 }
 172         i = strlen((char *)buf);
 173         /* If the key is used for SGC the algorithm is modified a little. */
 174         if(sgckey){
 175                 EVP_MD_CTX mctx;
 176                 EVP_DigestInit(&mctx, EVP_md5());
 177                 EVP_DigestUpdate(&mctx, buf, i);
 178                 EVP_DigestFinal(&mctx, buf, NULL);
 179                 memcpy(buf + 16, "SGCKEYSALT", 10);
 180                 i = 26;
 181         }
 182
 183         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
 184         memset(buf,0,256);
 185
 186         EVP_CIPHER_CTX_init(&ctx);
 187         EVP_EncryptInit(&ctx,EVP_rc4(),key,NULL);
 188         EVP_EncryptUpdate(&ctx,os2.data,&i,os2.data,os2.length);
 189         EVP_EncryptFinal(&ctx,&(os2.data[i]),&j);
 190         EVP_CIPHER_CTX_cleanup(&ctx);
 191
 192         p= *pp;
 193         ASN1_put_object(&p,1,l[4]+l[3],V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 194         i2d_ASN1_OCTET_STRING(&os,&p);
 195         ASN1_put_object(&p,1,l[2]+l[1],V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 196         i2d_X509_ALGOR(alg,&p);
 197         i2d_ASN1_OCTET_STRING(&os2,&p);
 198         ret=l[5];
 199 err:
 200         if (os2.data != NULL) OPENSSL_free(os2.data);
 201         if (alg != NULL) X509_ALGOR_free(alg);
 202         if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 203         r=r;
 204         return(ret);
 205         }
 206
 207
 208 RSA *d2i_Netscape_RSA(RSA **a, const unsigned char **pp, long length, int (*cb)())
 209 {
 210         return d2i_RSA_NET(a, pp, length, cb, 0);
 211 }
 212
 213 RSA *d2i_RSA_NET(RSA **a, const unsigned char **pp, long length, int (*cb)(), int sgckey)
 214         {
 215         RSA *ret=NULL;
 216         ASN1_OCTET_STRING *os=NULL;
 217         ASN1_CTX c;
 218
 219         c.pp=(unsigned char **)pp; /* TMP UGLY CAST */
 220         c.error=ASN1_R_DECODING_ERROR;
 221
 222         M_ASN1_D2I_Init();
 223         M_ASN1_D2I_start_sequence();
 224         M_ASN1_D2I_get(os,d2i_ASN1_OCTET_STRING);
 225         if ((os->length != 11) || (strncmp("private-key",
 226                 (char *)os->data,os->length) != 0))
 227                 {
 228                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_PRIVATE_KEY_HEADER_MISSING);
 229                 M_ASN1_BIT_STRING_free(os);
 230                 goto err;
 231                 }
 232         M_ASN1_BIT_STRING_free(os);
 233         c.q=c.p;
 234         if ((ret=d2i_RSA_NET_2(a,(const unsigned char **)&c.p, /* TMP UGLY CAST */
 235                                c.slen,cb, sgckey)) == NULL) goto err;
 236         /* Note: some versions of IIS key files use length values that are
 237          * too small for the surrounding SEQUENCEs. This following line
 238          * effectively disable length checking.
 239          */
 240         c.slen = 0;
 241
 242         M_ASN1_D2I_Finish(a,RSA_free,ASN1_F_D2I_NETSCAPE_RSA);
 243         }
 244
 245 RSA *d2i_Netscape_RSA_2(RSA **a, const unsigned char **pp, long length,
 246              int (*cb)())
 247 {
 248         return d2i_RSA_NET_2(a, pp, length, cb, 0);
 249 }
 250
 251 RSA *d2i_RSA_NET_2(RSA **a, const unsigned char **pp, long length,
 252              int (*cb)(), int sgckey)
 253         {
 254         NETSCAPE_PKEY *pkey=NULL;
 255         RSA *ret=NULL;
 256         int i,j;
 257         unsigned char buf[256],*zz;
 258         unsigned char key[EVP_MAX_KEY_LENGTH];
 259         EVP_CIPHER_CTX ctx;
 260         X509_ALGOR *alg=NULL;
 261         ASN1_OCTET_STRING *os=NULL;
 262         ASN1_CTX c;
 263
 264         c.error=ERR_R_NESTED_ASN1_ERROR;
 265         c.pp=(unsigned char **)pp;
 266
 267         M_ASN1_D2I_Init();
 268         M_ASN1_D2I_start_sequence();
 269         M_ASN1_D2I_get(alg,d2i_X509_ALGOR);
 270         if (OBJ_obj2nid(alg->algorithm) != NID_rc4)
 271                 {
 272                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
 273                 goto err;
 274                 }
 275         M_ASN1_D2I_get(os,d2i_ASN1_OCTET_STRING);
 276         if (cb == NULL)
 277                 cb=EVP_read_pw_string;
 278         i=cb(buf,256,"Enter Private Key password:",0);
 279         if (i != 0)
 280                 {
 281                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_BAD_PASSWORD_READ);
 282                 goto err;
 283                 }
 284
 285         i = strlen((char *)buf);
 286         if(sgckey){
 287                 EVP_MD_CTX mctx;
 288                 EVP_DigestInit(&mctx, EVP_md5());
 289                 EVP_DigestUpdate(&mctx, buf, i);
 290                 EVP_DigestFinal(&mctx, buf, NULL);
 291                 memcpy(buf + 16, "SGCKEYSALT", 10);
 292                 i = 26;
 293         }
 294
 295         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,i,1,key,NULL);
 296         memset(buf,0,256);
 297
 298         EVP_CIPHER_CTX_init(&ctx);
 299         EVP_DecryptInit(&ctx,EVP_rc4(),key,NULL);
 300         EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);
 301         EVP_DecryptFinal(&ctx,&(os->data[i]),&j);
 302         EVP_CIPHER_CTX_cleanup(&ctx);
 303         os->length=i+j;
 304
 305         zz=os->data;
 306
 307         if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
 308                 {
 309                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
 310                 goto err;
 311                 }
 312
 313         zz=pkey->private_key->data;
 314         if ((ret=d2i_RSAPrivateKey(a,(const unsigned char **)&zz, /* TMP UGLY CAST */
 315                 pkey->private_key->length)) == NULL)
 316                 {
 317                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
 318                 goto err;
 319                 }
 320         if (!asn1_Finish(&c)) goto err;
 321         *pp=c.p;
 322 err:
 323         if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 324         if (os != NULL) M_ASN1_BIT_STRING_free(os);
 325         if (alg != NULL) X509_ALGOR_free(alg);
 326         return(ret);
 327         }
 328
 329 static int i2d_NETSCAPE_PKEY(NETSCAPE_PKEY *a, unsigned char **pp)
 330         {
 331         M_ASN1_I2D_vars(a);
 332
 333
 334         M_ASN1_I2D_len(a->version,      i2d_ASN1_INTEGER);
 335         M_ASN1_I2D_len(a->algor,        i2d_X509_ALGOR);
 336         M_ASN1_I2D_len(a->private_key,  i2d_ASN1_OCTET_STRING);
 337
 338         M_ASN1_I2D_seq_total();
 339
 340         M_ASN1_I2D_put(a->version,      i2d_ASN1_INTEGER);
 341         M_ASN1_I2D_put(a->algor,        i2d_X509_ALGOR);
 342         M_ASN1_I2D_put(a->private_key,  i2d_ASN1_OCTET_STRING);
 343
 344         M_ASN1_I2D_finish();
 345         }
 346
 347 static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a, unsigned char **pp,
 348              long length)
 349         {
 350         M_ASN1_D2I_vars(a,NETSCAPE_PKEY *,NETSCAPE_PKEY_new);
 351
 352         M_ASN1_D2I_Init();
 353         M_ASN1_D2I_start_sequence();
 354         M_ASN1_D2I_get(ret->version,d2i_ASN1_INTEGER);
 355         M_ASN1_D2I_get(ret->algor,d2i_X509_ALGOR);
 356         M_ASN1_D2I_get(ret->private_key,d2i_ASN1_OCTET_STRING);
 357         M_ASN1_D2I_Finish(a,NETSCAPE_PKEY_free,ASN1_F_D2I_NETSCAPE_PKEY);
 358         }
 359
 360 static NETSCAPE_PKEY *NETSCAPE_PKEY_new(void)
 361         {
 362         NETSCAPE_PKEY *ret=NULL;
 363         ASN1_CTX c;
 364
 365         M_ASN1_New_Malloc(ret,NETSCAPE_PKEY);
 366         M_ASN1_New(ret->version,M_ASN1_INTEGER_new);
 367         M_ASN1_New(ret->algor,X509_ALGOR_new);
 368         M_ASN1_New(ret->private_key,M_ASN1_OCTET_STRING_new);
 369         return(ret);
 370         M_ASN1_New_Error(ASN1_F_NETSCAPE_PKEY_NEW);
 371         }
 372
 373 static void NETSCAPE_PKEY_free(NETSCAPE_PKEY *a)
 374         {
 375         if (a == NULL) return;
 376         M_ASN1_INTEGER_free(a->version);
 377         X509_ALGOR_free(a->algor);
 378         M_ASN1_OCTET_STRING_free(a->private_key);
 379         OPENSSL_free(a);
 380         }
 381
 382 #endif /* NO_RC4 */
 383
 384 #else /* !NO_RSA */
 385
 386 # if PEDANTIC
 387 static void *dummy=&dummy;
 388 # endif
 389
 390 #endif