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 <openssl/rsa.h>
  62 #include <openssl/objects.h>
  63 #include <openssl/asn1_mac.h>
  64 #include <openssl/evp.h>
  65 #include <openssl/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 static int i2d_NETSCAPE_PKEY(NETSCAPE_PKEY *a, unsigned char **pp);
  78 static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a,unsigned char **pp, long length);
  79 static NETSCAPE_PKEY *NETSCAPE_PKEY_new(void);
  80 static void NETSCAPE_PKEY_free(NETSCAPE_PKEY *);
  81 int i2d_Netscape_RSA(RSA *a, unsigned char **pp, int (*cb)())
  82         {
  83         int i,j,l[6];
  84         NETSCAPE_PKEY *pkey;
  85         unsigned char buf[256],*zz;
  86         unsigned char key[EVP_MAX_KEY_LENGTH];
  87         EVP_CIPHER_CTX ctx;
  88         X509_ALGOR *alg=NULL;
  89         ASN1_OCTET_STRING os,os2;
  90         M_ASN1_I2D_vars(a);
  91
  92         if (a == NULL) return(0);
  93
  94 #ifdef WIN32
  95         r=r; /* shut the damn compiler up :-) */
  96 #endif
  97
  98         os.data=os2.data=NULL;
  99         if ((pkey=NETSCAPE_PKEY_new()) == NULL) goto err;
 100         if (!ASN1_INTEGER_set(pkey->version,0)) goto err;
 101
 102         if (pkey->algor->algorithm != NULL)
 103                 ASN1_OBJECT_free(pkey->algor->algorithm);
 104         pkey->algor->algorithm=OBJ_nid2obj(NID_rsaEncryption);
 105         if ((pkey->algor->parameter=ASN1_TYPE_new()) == NULL) goto err;
 106         pkey->algor->parameter->type=V_ASN1_NULL;
 107
 108         l[0]=i2d_RSAPrivateKey(a,NULL);
 109         pkey->private_key->length=l[0];
 110
 111         os2.length=i2d_NETSCAPE_PKEY(pkey,NULL);
 112         l[1]=i2d_ASN1_OCTET_STRING(&os2,NULL);
 113
 114         if ((alg=X509_ALGOR_new()) == NULL) goto err;
 115         if (alg->algorithm != NULL)
 116                 ASN1_OBJECT_free(alg->algorithm);
 117         alg->algorithm=OBJ_nid2obj(NID_rc4);
 118         if ((alg->parameter=ASN1_TYPE_new()) == NULL) goto err;
 119         alg->parameter->type=V_ASN1_NULL;
 120
 121         l[2]=i2d_X509_ALGOR(alg,NULL);
 122         l[3]=ASN1_object_size(1,l[2]+l[1],V_ASN1_SEQUENCE);
 123
 124 #ifndef CONST_STRICT
 125         os.data=(unsigned char *)"private-key";
 126 #endif
 127         os.length=11;
 128         l[4]=i2d_ASN1_OCTET_STRING(&os,NULL);
 129
 130         l[5]=ASN1_object_size(1,l[4]+l[3],V_ASN1_SEQUENCE);
 131
 132         if (pp == NULL)
 133                 {
 134                 if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 135                 if (alg != NULL) X509_ALGOR_free(alg);
 136                 return(l[5]);
 137                 }
 138
 139         if (pkey->private_key->data != NULL)
 140                 Free((char *)pkey->private_key->data);
 141         if ((pkey->private_key->data=(unsigned char *)Malloc(l[0])) == NULL)
 142                 {
 143                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
 144                 goto err;
 145                 }
 146         zz=pkey->private_key->data;
 147         i2d_RSAPrivateKey(a,&zz);
 148
 149         if ((os2.data=(unsigned char *)Malloc(os2.length)) == NULL)
 150                 {
 151                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ERR_R_MALLOC_FAILURE);
 152                 goto err;
 153                 }
 154         zz=os2.data;
 155         i2d_NETSCAPE_PKEY(pkey,&zz);
 156
 157         if (cb == NULL)
 158                 cb=EVP_read_pw_string;
 159         i=cb(buf,256,"Enter Private Key password:",1);
 160         if (i != 0)
 161                 {
 162                 ASN1err(ASN1_F_I2D_NETSCAPE_RSA,ASN1_R_BAD_PASSWORD_READ);
 163                 goto err;
 164                 }
 165         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,
 166                 strlen((char *)buf),1,key,NULL);
 167         memset(buf,0,256);
 168
 169         EVP_CIPHER_CTX_init(&ctx);
 170         EVP_EncryptInit(&ctx,EVP_rc4(),key,NULL);
 171         EVP_EncryptUpdate(&ctx,os2.data,&i,os2.data,os2.length);
 172         EVP_EncryptFinal(&ctx,&(os2.data[i]),&j);
 173         EVP_CIPHER_CTX_cleanup(&ctx);
 174
 175         p= *pp;
 176         ASN1_put_object(&p,1,l[4]+l[3],V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 177         i2d_ASN1_OCTET_STRING(&os,&p);
 178         ASN1_put_object(&p,1,l[2]+l[1],V_ASN1_SEQUENCE,V_ASN1_UNIVERSAL);
 179         i2d_X509_ALGOR(alg,&p);
 180         i2d_ASN1_OCTET_STRING(&os2,&p);
 181         ret=l[5];
 182 err:
 183         if (os2.data != NULL) Free(os2.data);
 184         if (alg != NULL) X509_ALGOR_free(alg);
 185         if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 186         r=r;
 187         return(ret);
 188         }
 189
 190 RSA *d2i_Netscape_RSA(RSA **a, unsigned char **pp, long length, int (*cb)())
 191         {
 192         RSA *ret=NULL;
 193         ASN1_OCTET_STRING *os=NULL;
 194         ASN1_CTX c;
 195
 196         c.pp=pp;
 197         c.error=ASN1_R_DECODING_ERROR;
 198
 199         M_ASN1_D2I_Init();
 200         M_ASN1_D2I_start_sequence();
 201         M_ASN1_D2I_get(os,d2i_ASN1_OCTET_STRING);
 202         if ((os->length != 11) || (strncmp("private-key",
 203                 (char *)os->data,os->length) != 0))
 204                 {
 205                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA,ASN1_R_PRIVATE_KEY_HEADER_MISSING);
 206                 ASN1_BIT_STRING_free(os);
 207                 goto err;
 208                 }
 209         ASN1_BIT_STRING_free(os);
 210         c.q=c.p;
 211         if ((ret=d2i_Netscape_RSA_2(a,&c.p,c.slen,cb)) == NULL) goto err;
 212         c.slen-=(c.p-c.q);
 213
 214         M_ASN1_D2I_Finish(a,RSA_free,ASN1_F_D2I_NETSCAPE_RSA);
 215         }
 216
 217 RSA *d2i_Netscape_RSA_2(RSA **a, unsigned char **pp, long length,
 218              int (*cb)())
 219         {
 220         NETSCAPE_PKEY *pkey=NULL;
 221         RSA *ret=NULL;
 222         int i,j;
 223         unsigned char buf[256],*zz;
 224         unsigned char key[EVP_MAX_KEY_LENGTH];
 225         EVP_CIPHER_CTX ctx;
 226         X509_ALGOR *alg=NULL;
 227         ASN1_OCTET_STRING *os=NULL;
 228         ASN1_CTX c;
 229
 230         c.error=ERR_R_NESTED_ASN1_ERROR;
 231         c.pp=pp;
 232
 233         M_ASN1_D2I_Init();
 234         M_ASN1_D2I_start_sequence();
 235         M_ASN1_D2I_get(alg,d2i_X509_ALGOR);
 236         if (OBJ_obj2nid(alg->algorithm) != NID_rc4)
 237                 {
 238                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNSUPPORTED_ENCRYPTION_ALGORITHM);
 239                 goto err;
 240                 }
 241         M_ASN1_D2I_get(os,d2i_ASN1_OCTET_STRING);
 242         if (cb == NULL)
 243                 cb=EVP_read_pw_string;
 244         i=cb(buf,256,"Enter Private Key password:",0);
 245         if (i != 0)
 246                 {
 247                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_BAD_PASSWORD_READ);
 248                 goto err;
 249                 }
 250
 251         EVP_BytesToKey(EVP_rc4(),EVP_md5(),NULL,buf,
 252                 strlen((char *)buf),1,key,NULL);
 253         memset(buf,0,256);
 254
 255         EVP_CIPHER_CTX_init(&ctx);
 256         EVP_DecryptInit(&ctx,EVP_rc4(),key,NULL);
 257         EVP_DecryptUpdate(&ctx,os->data,&i,os->data,os->length);
 258         EVP_DecryptFinal(&ctx,&(os->data[i]),&j);
 259         EVP_CIPHER_CTX_cleanup(&ctx);
 260         os->length=i+j;
 261
 262         zz=os->data;
 263
 264         if ((pkey=d2i_NETSCAPE_PKEY(NULL,&zz,os->length)) == NULL)
 265                 {
 266                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_PRIVATE_KEY);
 267                 goto err;
 268                 }
 269
 270         zz=pkey->private_key->data;
 271         if ((ret=d2i_RSAPrivateKey(a,&zz,pkey->private_key->length)) == NULL)
 272                 {
 273                 ASN1err(ASN1_F_D2I_NETSCAPE_RSA_2,ASN1_R_UNABLE_TO_DECODE_RSA_KEY);
 274                 goto err;
 275                 }
 276         if (!asn1_Finish(&c)) goto err;
 277         *pp=c.p;
 278 err:
 279         if (pkey != NULL) NETSCAPE_PKEY_free(pkey);
 280         if (os != NULL) ASN1_BIT_STRING_free(os);
 281         if (alg != NULL) X509_ALGOR_free(alg);
 282         return(ret);
 283         }
 284
 285 static int i2d_NETSCAPE_PKEY(NETSCAPE_PKEY *a, unsigned char **pp)
 286         {
 287         M_ASN1_I2D_vars(a);
 288
 289
 290         M_ASN1_I2D_len(a->version,      i2d_ASN1_INTEGER);
 291         M_ASN1_I2D_len(a->algor,        i2d_X509_ALGOR);
 292         M_ASN1_I2D_len(a->private_key,  i2d_ASN1_OCTET_STRING);
 293
 294         M_ASN1_I2D_seq_total();
 295
 296         M_ASN1_I2D_put(a->version,      i2d_ASN1_INTEGER);
 297         M_ASN1_I2D_put(a->algor,        i2d_X509_ALGOR);
 298         M_ASN1_I2D_put(a->private_key,  i2d_ASN1_OCTET_STRING);
 299
 300         M_ASN1_I2D_finish();
 301         }
 302
 303 static NETSCAPE_PKEY *d2i_NETSCAPE_PKEY(NETSCAPE_PKEY **a, unsigned char **pp,
 304              long length)
 305         {
 306         M_ASN1_D2I_vars(a,NETSCAPE_PKEY *,NETSCAPE_PKEY_new);
 307
 308         M_ASN1_D2I_Init();
 309         M_ASN1_D2I_start_sequence();
 310         M_ASN1_D2I_get(ret->version,d2i_ASN1_INTEGER);
 311         M_ASN1_D2I_get(ret->algor,d2i_X509_ALGOR);
 312         M_ASN1_D2I_get(ret->private_key,d2i_ASN1_OCTET_STRING);
 313         M_ASN1_D2I_Finish(a,NETSCAPE_PKEY_free,ASN1_F_D2I_NETSCAPE_PKEY);
 314         }
 315
 316 static NETSCAPE_PKEY *NETSCAPE_PKEY_new(void)
 317         {
 318         NETSCAPE_PKEY *ret=NULL;
 319         ASN1_CTX c;
 320
 321         M_ASN1_New_Malloc(ret,NETSCAPE_PKEY);
 322         M_ASN1_New(ret->version,ASN1_INTEGER_new);
 323         M_ASN1_New(ret->algor,X509_ALGOR_new);
 324         M_ASN1_New(ret->private_key,ASN1_OCTET_STRING_new);
 325         return(ret);
 326         M_ASN1_New_Error(ASN1_F_NETSCAPE_PKEY_NEW);
 327         }
 328
 329 static void NETSCAPE_PKEY_free(NETSCAPE_PKEY *a)
 330         {
 331         if (a == NULL) return;
 332         ASN1_INTEGER_free(a->version);
 333         X509_ALGOR_free(a->algor);
 334         ASN1_OCTET_STRING_free(a->private_key);
 335         Free((char *)a);
 336         }
 337
 338 #endif /* NO_RC4 */
 339