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