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 #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 int i2d_NETSCAPE_PKEY(NETSCAPE_PKEY *a, unsigned char **pp);
  85 static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a,unsigned char **pp, long length);
  86 static NETSCAPE_PKEY *NETSCAPE_PKEY_new(void);
  87 static void NETSCAPE_PKEY_free(NETSCAPE_PKEY *);
  88 #else
  89 static int i2d_NETSCAPE_PKEY();
  90 static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY();
  91 static NETSCAPE_PKEY *NETSCAPE_PKEY_new();
  92 static void NETSCAPE_PKEY_free();
  93 #endif
  94
  95 int i2d_Netscape_RSA(a,pp,cb)
  96 RSA *a;
  97 unsigned char **pp;
  98 int (*cb)();
  99         {
 100         int i,j,l[6];
 101         NETSCAPE_PKEY *pkey;
 102         unsigned char buf[256],*zz;
 103         unsigned char key[EVP_MAX_KEY_LENGTH];
 104         EVP_CIPHER_CTX ctx;
 105         X509_ALGOR *alg=NULL;
 106         ASN1_OCTET_STRING os,os2;
 107         M_ASN1_I2D_vars(a);
 108
 109         if (a == NULL) return(0);
 110
 111 #ifdef WIN32
 112         r=r; /* shut the damn compiler up :-) */
 113 #endif
 114
 115         os.data=os2.data=NULL;
 116         if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err;
 117         if (!ASN1_INTEGER_set(pkey->version,0)) goto err;
 118
 119         if (pkey->algor->algorithm != NULL)
 120                 ASN1_OBJECT_free(pkey->algor->algorithm);
 121         pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption);
 122         if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
 123         pkey->algor->parameter->type=V_ASN1_NULL;
 124
 125         l[0]=i2d_RSAPrivateKey(a,NULL);
 126         pkey->private_key->length=l[0];
 127
 128         os2.length=i2d_NETSCAPE_PKEY(pkey,NULL);
 129         l[1]=i2d_ASN1_OCTET_STRING(&os2,NULL);
 130
 131         if ((alg=X509_ALGOR_new()) == NULL) goto err;
 132         if (alg->algorithm != NULL)
 133                 ASN1_OBJECT_free(alg->algorithm);
 134         alg->algorithm=OBJ_nid2obj(NID_rc4);
 135         if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err;
 136         alg->parameter->type=V_ASN1_NULL;
 137
 138         l[2]=i2d_X509_ALGOR(alg,NULL);
 139         l[3]=ASN1_object_size(1,l[2]+l[1],V_ASN1_SEQUENCE);
 140
 141         os.data=(unsigned char *)"private-key";
 142         os.length=11;
 143         l[4]=i2d_ASN1_OCTET_STRING(&os,NULL);
 144
 145         l[5]=ASN1_object_size(1,l[4]+l[3],V_ASN1_SEQUENCE);
 146
 147         if (pp == NULL)
 148                 {
 149                 if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 150                 if (alg != NULL) X509_ALGOR_free(alg);
 151                 return(l[5]);
 152                 }
 153
 154         if (pkey->private_key->data != NULL)
 155                 Free((char *)pkey->private_key->data);
 156         if ((pkey->private_key->data=(unsigned char *)Malloc(l[0])) == NULL)
 157                 {
 158                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
 159                 goto err;
 160                 }
 161         zz=pkey->private_key->data;
 162         i2d_RSAPrivateKey(a,&zz);
 163
 164         if ((os2.data=(unsigned char *)Malloc(os2.length)) == NULL)
 165                 {
 166                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
 167                 goto err;
 168                 }
 169         zz=os2.data;
 170         i2d_NETSCAPE_PKEY(pkey,&zz);
 171
 172         if (cb == NULL)
 173                 cb=EVP_read_pw_string;
 174         i=cb(buf,256,"Enter Private Key password:",1);
 175         if (i != 0)
 176                 {
 177                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ASN1_R_BAD_PASSWORD_READ);
 178                 goto err;
 179                 }
 180         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,
 181                 strlen((char *)buf),1,key,NULL);
 182         memset(buf,0,256);
 183
 184         EVP_CIPHER_CTX_init(&ctx);
 185         EVP_EncryptInit(&ctx,EVP_rc4(),key,NULL);
 186         EVP_EncryptUpdate(&ctx,os2.data,&i,os2.data,os2.length);
 187         EVP_EncryptFinal(&ctx,&(os2.data[i]),&j);
 188         EVP_CIPHER_CTX_cleanup(&ctx);
 189
 190         p= *pp;
 191         ASN1_put_object(&p,1,l[4]+l[3],V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 192         i2d_ASN1_OCTET_STRING(&os,&p);
 193         ASN1_put_object(&p,1,l[2]+l[1],V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 194         i2d_X509_ALGOR(alg,&p);
 195         i2d_ASN1_OCTET_STRING(&os2,&p);
 196         ret=l[5];
 197 err:
 198         if (os2.data != NULL) Free((char *)os2.data);
 199         if (alg != NULL) X509_ALGOR_free(alg);
 200         if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 201         r=r;
 202         return(ret);
 203         }
 204
 205 RSA *d2i_Netscape_RSA(a,pp,length,cb)
 206 RSA **a;
 207 unsigned char **pp;
 208 long length;
 209 int (*cb)();
 210         {
 211         RSA *ret=NULL;
 212         ASN1_OCTET_STRING *os=NULL;
 213         ASN1_CTX c;
 214
 215         c.pp=pp;
 216         c.error=ASN1_R_DECODING_ERROR;
 217
 218         M_ASN1_D2I_Init();
 219         M_ASN1_D2I_start_sequence();
 220         M_ASN1_D2I_get(os,d2i_ASN1_OCTET_STRING);
 221         if ((os->length != 11) || (strncmp("private-key",
 222                 (char *)os->data,os->length) != 0))
 223                 {
 224                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_PRIVATE_KEY_HEADER_MISSING);
 225                 ASN1_BIT_STRING_free(os);
 226                 goto err;
 227                 }
 228         ASN1_BIT_STRING_free(os);
 229         c.q=c.p;
 230         if ((ret=d2i_Netscape_RSA_2(a,&c.p,c.slen,cb)) == NULL) goto err;
 231         c.slen-=(c.p-c.q);
 232
 233         M_ASN1_D2I_Finish(a,RSA_free,ASN1_F_D2I_NETSCAPE_RSA);
 234         }
 235
 236 RSA *d2i_Netscape_RSA_2(a,pp,length,cb)
 237 RSA **a;
 238 unsigned char **pp;
 239 long length;
 240 int (*cb)();
 241         {
 242         NETSCAPE_PKEY *pkey=NULL;
 243         RSA *ret=NULL;
 244         int i,j;
 245         unsigned char buf[256],*zz;
 246         unsigned char key[EVP_MAX_KEY_LENGTH];
 247         EVP_CIPHER_CTX ctx;
 248         X509_ALGOR *alg=NULL;
 249         ASN1_OCTET_STRING *os=NULL;
 250         ASN1_CTX c;
 251
 252         c.error=ASN1_R_ERROR_STACK;
 253         c.pp=pp;
 254
 255         M_ASN1_D2I_Init();
 256         M_ASN1_D2I_start_sequence();
 257         M_ASN1_D2I_get(alg,d2i_X509_ALGOR);
 258         if (OBJ_obj2nid(alg->algorithm) != NID_rc4)
 259                 {
 260                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
 261                 goto err;
 262                 }
 263         M_ASN1_D2I_get(os,d2i_ASN1_OCTET_STRING);
 264         if (cb == NULL)
 265                 cb=EVP_read_pw_string;
 266         i=cb(buf,256,"Enter Private Key password:",0);
 267         if (i != 0)
 268                 {
 269                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_BAD_PASSWORD_READ);
 270                 goto err;
 271                 }
 272
 273         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,
 274                 strlen((char *)buf),1,key,NULL);
 275         memset(buf,0,256);
 276
 277         EVP_CIPHER_CTX_init(&ctx);
 278         EVP_DecryptInit(&ctx,EVP_rc4(),key,NULL);
 279         EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);
 280         EVP_DecryptFinal(&ctx,&(os->data[i]),&j);
 281         EVP_CIPHER_CTX_cleanup(&ctx);
 282         os->length=i+j;
 283
 284         zz=os->data;
 285
 286         if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
 287                 {
 288                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
 289                 goto err;
 290                 }
 291
 292         zz=pkey->private_key->data;
 293         if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL)
 294                 {
 295                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
 296                 goto err;
 297                 }
 298         if (!asn1_Finish(&c)) goto err;
 299         *pp=c.p;
 300 err:
 301         if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 302         if (os != NULL) ASN1_BIT_STRING_free(os);
 303         if (alg != NULL) X509_ALGOR_free(alg);
 304         return(ret);
 305         }
 306
 307 static int i2d_NETSCAPE_PKEY(a,pp)
 308 NETSCAPE_PKEY *a;
 309 unsigned char **pp;
 310         {
 311         M_ASN1_I2D_vars(a);
 312
 313
 314         M_ASN1_I2D_len(a->version,      i2d_ASN1_INTEGER);
 315         M_ASN1_I2D_len(a->algor,        i2d_X509_ALGOR);
 316         M_ASN1_I2D_len(a->private_key,  i2d_ASN1_OCTET_STRING);
 317
 318         M_ASN1_I2D_seq_total();
 319
 320         M_ASN1_I2D_put(a->version,      i2d_ASN1_INTEGER);
 321         M_ASN1_I2D_put(a->algor,        i2d_X509_ALGOR);
 322         M_ASN1_I2D_put(a->private_key,  i2d_ASN1_OCTET_STRING);
 323
 324         M_ASN1_I2D_finish();
 325         }
 326
 327 static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(a,pp,length)
 328 NETSCAPE_PKEY **a;
 329 unsigned char **pp;
 330 long length;
 331         {
 332         M_ASN1_D2I_vars(a,NETSCAPE_PKEY *,NETSCAPE_PKEY_new);
 333
 334         M_ASN1_D2I_Init();
 335         M_ASN1_D2I_start_sequence();
 336         M_ASN1_D2I_get(ret->version,d2i_ASN1_INTEGER);
 337         M_ASN1_D2I_get(ret->algor,d2i_X509_ALGOR);
 338         M_ASN1_D2I_get(ret->private_key,d2i_ASN1_OCTET_STRING);
 339         M_ASN1_D2I_Finish(a,NETSCAPE_PKEY_free,ASN1_F_D2I_NETSCAPE_PKEY);
 340         }
 341
 342 static NETSCAPE_PKEY *NETSCAPE_PKEY_new()
 343         {
 344         NETSCAPE_PKEY *ret=NULL;
 345
 346         M_ASN1_New_Malloc(ret,NETSCAPE_PKEY);
 347         M_ASN1_New(ret->version,ASN1_INTEGER_new);
 348         M_ASN1_New(ret->algor,X509_ALGOR_new);
 349         M_ASN1_New(ret->private_key,ASN1_OCTET_STRING_new);
 350         return(ret);
 351         M_ASN1_New_Error(ASN1_F_NETSCAPE_PKEY_NEW);
 352         }
 353
 354 static void NETSCAPE_PKEY_free(a)
 355 NETSCAPE_PKEY *a;
 356         {
 357         if (a == NULL) return;
 358         ASN1_INTEGER_free(a->version);
 359         X509_ALGOR_free(a->algor);
 360         ASN1_OCTET_STRING_free(a->private_key);
 361         Free((char *)a);
 362         }
 363
 364 #endif /* NO_RC4 */
 365