crypto/asn1/n_pkey.c

   1 /* crypto/asn1/n_pkey.c */
   2 /* Copyright (C) 1995-1997 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 #include "rsa.h"
  62 #include "objects.h"
  63 #include "asn1_mac.h"
  64 #include "evp.h"
  65 #include "x509.h"
  66
  67
  68 #ifndef NO_RC4
  69
  70 typedef struct netscape_pkey_st
  71         {
  72         ASN1_INTEGER *version;
  73         X509_ALGOR *algor;
  74         ASN1_OCTET_STRING *private_key;
  75         } NETSCAPE_PKEY;
  76
  77 /*
  78  * ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_LENGTH_MISMATCH);
  79  * ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_DECODING_ERROR);
  80  * ASN1err(ASN1_F_D2I_NETSCAPE_PKEY,ASN1_R_DECODING_ERROR);
  81  * ASN1err(ASN1_F_NETSCAPE_PKEY_NEW,ASN1_R_DECODING_ERROR);
  82  */
  83 #ifndef NOPROTO
  84 static RSA *d2i_Netscape_RSA_2(RSA **a, unsigned char **pp, long length,
  85         int (*cb)());
  86 static int i2d_NETSCAPE_PKEY(NETSCAPE_PKEY *a, unsigned char **pp);
  87 static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a,unsigned char **pp, long length);
  88 static NETSCAPE_PKEY *NETSCAPE_PKEY_new(void);
  89 static void NETSCAPE_PKEY_free(NETSCAPE_PKEY *);
  90 #else
  91 static RSA *d2i_Netscape_RSA_2();
  92 static int i2d_NETSCAPE_PKEY();
  93 static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY();
  94 static NETSCAPE_PKEY *NETSCAPE_PKEY_new();
  95 static void NETSCAPE_PKEY_free();
  96 #endif
  97
  98 int i2d_Netscape_RSA(a,pp,cb)
  99 RSA *a;
 100 unsigned char **pp;
 101 int (*cb)();
 102         {
 103         int i,j,l[6];
 104         NETSCAPE_PKEY *pkey;
 105         unsigned char buf[256],*zz;
 106         unsigned char key[EVP_MAX_KEY_LENGTH];
 107         EVP_CIPHER_CTX ctx;
 108         X509_ALGOR *alg=NULL;
 109         ASN1_OCTET_STRING os,os2;
 110         M_ASN1_I2D_vars(a);
 111
 112         if (a == NULL) return(0);
 113
 114 #ifdef WIN32
 115         r=r; /* shut the damn compiler up :-) */
 116 #endif
 117
 118         os.data=os2.data=NULL;
 119         if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err;
 120         if (!ASN1_INTEGER_set(pkey->version,0)) goto err;
 121
 122         if (pkey->algor->algorithm != NULL)
 123                 ASN1_OBJECT_free(pkey->algor->algorithm);
 124         pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption);
 125         if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
 126         pkey->algor->parameter->type=V_ASN1_NULL;
 127
 128         l[0]=i2d_RSAPrivateKey(a,NULL);
 129         pkey->private_key->length=l[0];
 130
 131         os2.length=i2d_NETSCAPE_PKEY(pkey,NULL);
 132         l[1]=i2d_ASN1_OCTET_STRING(&os2,NULL);
 133
 134         if ((alg=X509_ALGOR_new()) == NULL) goto err;
 135         if (alg->algorithm != NULL)
 136                 ASN1_OBJECT_free(alg->algorithm);
 137         alg->algorithm=OBJ_nid2obj(NID_rc4);
 138         if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err;
 139         alg->parameter->type=V_ASN1_NULL;
 140
 141         l[2]=i2d_X509_ALGOR(alg,NULL);
 142         l[3]=ASN1_object_size(1,l[2]+l[1],V_ASN1_SEQUENCE);
 143
 144         os.data=(unsigned char *)"private-key";
 145         os.length=11;
 146         l[4]=i2d_ASN1_OCTET_STRING(&os,NULL);
 147
 148         l[5]=ASN1_object_size(1,l[4]+l[3],V_ASN1_SEQUENCE);
 149
 150         if (pp == NULL)
 151                 {
 152                 if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 153                 if (alg != NULL) X509_ALGOR_free(alg);
 154                 return(l[5]);
 155                 }
 156
 157         if (pkey->private_key->data != NULL)
 158                 Free((char *)pkey->private_key->data);
 159         if ((pkey->private_key->data=(unsigned char *)Malloc(l[0])) == NULL)
 160                 {
 161                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
 162                 goto err;
 163                 }
 164         zz=pkey->private_key->data;
 165         i2d_RSAPrivateKey(a,&zz);
 166
 167         if ((os2.data=(unsigned char *)Malloc(os2.length)) == NULL)
 168                 {
 169                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
 170                 goto err;
 171                 }
 172         zz=os2.data;
 173         i2d_NETSCAPE_PKEY(pkey,&zz);
 174
 175         if (cb == NULL)
 176                 cb=EVP_read_pw_string;
 177         i=cb(buf,256,"Enter Private Key password:",1);
 178         if (i != 0)
 179                 {
 180                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ASN1_R_BAD_PASSWORD_READ);
 181                 goto err;
 182                 }
 183         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,
 184                 strlen((char *)buf),1,key,NULL);
 185         memset(buf,0,256);
 186         EVP_EncryptInit(&ctx,EVP_rc4(),key,NULL);
 187         EVP_EncryptUpdate(&ctx,os2.data,&i,os2.data,os2.length);
 188         EVP_EncryptFinal(&ctx,&(os2.data[i]),&j);
 189         EVP_CIPHER_CTX_cleanup(&ctx);
 190
 191         p= *pp;
 192         ASN1_put_object(&p,1,l[4]+l[3],V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 193         i2d_ASN1_OCTET_STRING(&os,&p);
 194         ASN1_put_object(&p,1,l[2]+l[1],V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 195         i2d_X509_ALGOR(alg,&p);
 196         i2d_ASN1_OCTET_STRING(&os2,&p);
 197         ret=l[5];
 198 err:
 199         if (os2.data != NULL) Free((char *)os2.data);
 200         if (alg != NULL) X509_ALGOR_free(alg);
 201         if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 202         r=r;
 203         return(ret);
 204         }
 205
 206 RSA *d2i_Netscape_RSA(a,pp,length,cb)
 207 RSA **a;
 208 unsigned char **pp;
 209 long length;
 210 int (*cb)();
 211         {
 212         RSA *ret=NULL;
 213         ASN1_OCTET_STRING *os=NULL;
 214         ASN1_CTX c;
 215
 216         c.pp=pp;
 217         c.error=ASN1_R_DECODING_ERROR;
 218
 219         M_ASN1_D2I_Init();
 220         M_ASN1_D2I_start_sequence();
 221         M_ASN1_D2I_get(os,d2i_ASN1_OCTET_STRING);
 222         if ((os->length != 11) || (strncmp("private-key",
 223                 (char *)os->data,os->length) != 0))
 224                 {
 225                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_PRIVATE_KEY_HEADER_MISSING);
 226                 ASN1_BIT_STRING_free(os);
 227                 goto err;
 228                 }
 229         ASN1_BIT_STRING_free(os);
 230         c.q=c.p;
 231         if ((ret=d2i_Netscape_RSA_2(a,&c.p,c.slen,cb)) == NULL) goto err;
 232         c.slen-=(c.p-c.q);
 233
 234         M_ASN1_D2I_Finish(a,RSA_free,ASN1_F_D2I_NETSCAPE_RSA);
 235         }
 236
 237 static RSA *d2i_Netscape_RSA_2(a,pp,length,cb)
 238 RSA **a;
 239 unsigned char **pp;
 240 long length;
 241 int (*cb)();
 242         {
 243         NETSCAPE_PKEY *pkey=NULL;
 244         RSA *ret=NULL;
 245         int i,j;
 246         unsigned char buf[256],*zz;
 247         unsigned char key[EVP_MAX_KEY_LENGTH];
 248         EVP_CIPHER_CTX ctx;
 249         X509_ALGOR *alg=NULL;
 250         ASN1_OCTET_STRING *os=NULL;
 251         ASN1_CTX c;
 252
 253         c.error=ASN1_R_ERROR_STACK;
 254         c.pp=pp;
 255
 256         M_ASN1_D2I_Init();
 257         M_ASN1_D2I_start_sequence();
 258         M_ASN1_D2I_get(alg,d2i_X509_ALGOR);
 259         if (OBJ_obj2nid(alg->algorithm) != NID_rc4)
 260                 {
 261                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
 262                 goto err;
 263                 }
 264         M_ASN1_D2I_get(os,d2i_ASN1_OCTET_STRING);
 265         if (cb == NULL)
 266                 cb=EVP_read_pw_string;
 267         i=cb(buf,256,"Enter Private Key password:",0);
 268         if (i != 0)
 269                 {
 270                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_BAD_PASSWORD_READ);
 271                 goto err;
 272                 }
 273
 274         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,
 275                 strlen((char *)buf),1,key,NULL);
 276         memset(buf,0,256);
 277         EVP_DecryptInit(&ctx,EVP_rc4(),key,NULL);
 278         EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);
 279         EVP_DecryptFinal(&ctx,&(os->data[i]),&j);
 280         EVP_CIPHER_CTX_cleanup(&ctx);
 281         os->length=i+j;
 282
 283         zz=os->data;
 284
 285         if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
 286                 {
 287                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
 288                 goto err;
 289                 }
 290
 291         zz=pkey->private_key->data;
 292         if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL)
 293                 {
 294                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
 295                 goto err;
 296                 }
 297         if (!asn1_Finish(&c)) goto err;
 298         *pp=c.p;
 299 err:
 300         if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 301         if (os != NULL) ASN1_BIT_STRING_free(os);
 302         if (alg != NULL) X509_ALGOR_free(alg);
 303         return(ret);
 304         }
 305
 306 static int i2d_NETSCAPE_PKEY(a,pp)
 307 NETSCAPE_PKEY *a;
 308 unsigned char **pp;
 309         {
 310         M_ASN1_I2D_vars(a);
 311
 312
 313         M_ASN1_I2D_len(a->version,      i2d_ASN1_INTEGER);
 314         M_ASN1_I2D_len(a->algor,        i2d_X509_ALGOR);
 315         M_ASN1_I2D_len(a->private_key,  i2d_ASN1_OCTET_STRING);
 316
 317         M_ASN1_I2D_seq_total();
 318
 319         M_ASN1_I2D_put(a->version,      i2d_ASN1_INTEGER);
 320         M_ASN1_I2D_put(a->algor,        i2d_X509_ALGOR);
 321         M_ASN1_I2D_put(a->private_key,  i2d_ASN1_OCTET_STRING);
 322
 323         M_ASN1_I2D_finish();
 324         }
 325
 326 static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(a,pp,length)
 327 NETSCAPE_PKEY **a;
 328 unsigned char **pp;
 329 long length;
 330         {
 331         M_ASN1_D2I_vars(a,NETSCAPE_PKEY *,NETSCAPE_PKEY_new);
 332
 333         M_ASN1_D2I_Init();
 334         M_ASN1_D2I_start_sequence();
 335         M_ASN1_D2I_get(ret->version,d2i_ASN1_INTEGER);
 336         M_ASN1_D2I_get(ret->algor,d2i_X509_ALGOR);
 337         M_ASN1_D2I_get(ret->private_key,d2i_ASN1_OCTET_STRING);
 338         M_ASN1_D2I_Finish(a,NETSCAPE_PKEY_free,ASN1_F_D2I_NETSCAPE_PKEY);
 339         }
 340
 341 static NETSCAPE_PKEY *NETSCAPE_PKEY_new()
 342         {
 343         NETSCAPE_PKEY *ret=NULL;
 344
 345         M_ASN1_New_Malloc(ret,NETSCAPE_PKEY);
 346         M_ASN1_New(ret->version,ASN1_INTEGER_new);
 347         M_ASN1_New(ret->algor,X509_ALGOR_new);
 348         M_ASN1_New(ret->private_key,ASN1_OCTET_STRING_new);
 349         return(ret);
 350         M_ASN1_New_Error(ASN1_F_NETSCAPE_PKEY_NEW);
 351         }
 352
 353 static void NETSCAPE_PKEY_free(a)
 354 NETSCAPE_PKEY *a;
 355         {
 356         if (a == NULL) return;
 357         ASN1_INTEGER_free(a->version);
 358         X509_ALGOR_free(a->algor);
 359         ASN1_OCTET_STRING_free(a->private_key);
 360         Free((char *)a);
 361         }
 362
 363 #endif /* NO_RC4 */
 364