crypto/x509v3/v3_ku.c

   1 /* crypto/x509v3/v3_ku.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 <ctype.h>
  61 #include "stack.h"
  62 #include "cryptlib.h"
  63 #include "bio.h"
  64 #include "asn1.h"
  65 #include "objects.h"
  66 #include "x509.h"
  67
  68 X509_EXTENSION_METHOD X509v3_key_usage_method=
  69         {
  70         NID_key_usage,
  71         ku_clear,
  72         ex_get_bool,
  73         ex_set_bool,
  74         NULL,
  75         NULL,
  76         NULL,
  77         NULL,
  78         ku_a2i,
  79         ku_i2a,
  80         };
  81
  82 static void ku_clear(a)
  83 X509_EXTENSION *a;
  84         {
  85         }
  86
  87 static int ku_expand(a)
  88 X509_EXTENSION *a;
  89         {
  90         ASN1_BIT_STRING *bs;
  91
  92         if (a->argp == NULL)
  93                 {
  94                 bs=X509v3_unpack_string(NULL,V_ASN1_BIT_STRING,value);
  95                 if (bs == NULL) return(0);
  96                 a->argp=(char *)bs;
  97                 a->ex_free=ASN1_STRING_free;
  98                 }
  99         return(1);
 100         }
 101
 102 static int ku_get_bool(a,num)
 103 X509_EXTENSION *a;
 104 int num;
 105         {
 106         int ret;
 107         ASN1_BIT_STRING *bs;
 108
 109         if ((a->argp == NULL) && !ku_expand(a))
 110                 return(-1);
 111         bs=(ASN1_BIT_STRING *)a->argp;
 112         ret=ASN1_BIT_STRING_get_bit(bs,num);
 113         return(ret);
 114         }
 115
 116 static int ku_set_bool(a,num,value)
 117 X509_EXTENSION *a;
 118 int num;
 119 int value;
 120         {
 121         ASN1_BIT_STRING *a;
 122
 123         if ((a->argp == NULL) && !ku_expand(a))
 124                 return(0);
 125         bs=(ASN1_BIT_STRING *)a->argp;
 126         ret=ASN1_BIT_STRING_set_bit(bs,num,value);
 127         }
 128
 129 static int ku_a2i(bio,a,buf,len)
 130 BIO *bio;
 131 X509_EXTENSION *a;
 132 char *buf;
 133 int len;
 134         {
 135         get token
 136         }
 137
 138 static char ku_names[X509v3_N_KU_NUM]={
 139         X509v3_S_KU_digitalSignature,
 140         X509v3_S_KU_nonRepudiation,
 141         X509v3_S_KU_keyEncipherment,
 142         X509v3_S_KU_dataEncipherment,
 143         X509v3_S_KU_keyAgreement,
 144         X509v3_S_KU_keyCertSign,
 145         X509v3_S_KU_cRLSign,
 146         X509v3_S_KU_encipherOnly,
 147         X509v3_S_KU_decipherOnly,
 148         };
 149
 150 static int ku_i2a(bio,a);
 151 BIO *bio;
 152 X509_EXTENSION *a;
 153         {
 154         int i,first=1;
 155         char *c;
 156
 157         for (i=0; i<X509v3_N_KU_NUM; i++)
 158                 {
 159                 if (ku_get_bool(a,i) > 0)
 160                         {
 161                         BIO_printf(bio,"%s%s",((first)?"":" "),ku_names[i]);
 162                         first=0;
 163                         }
 164                 }
 165         }
 166
 167 /***********************/
 168
 169 int X509v3_get_key_usage(x,ret)
 170 STACK *x;
 171 unsigned long *ret;
 172         {
 173         X509_EXTENSION *ext;
 174         ASN1_STRING *st;
 175         char *p;
 176         int i;
 177
 178         i=X509_get_ext_by_NID(x,NID_key_usage,-1);
 179         if (i < 0) return(X509v3_KU_UNDEF);
 180         ext=X509_get_ext(x,i);
 181         st=X509v3_unpack_string(NULL,V_ASN1_BIT_STRING,
 182                 X509_EXTENSION_get_data(X509_get_ext(x,i)));
 183
 184         p=ASN1_STRING_data(st);
 185         if (ASN1_STRING_length(st) == 1)
 186                 i=p[0];
 187         else if (ASN1_STRING_length(st) == 2)
 188                 i=p[0]|(p[1]<<8);
 189         else
 190                 i=0;
 191         return(i);
 192         }
 193
 194 static struct
 195         {
 196         char *name;
 197         unsigned int value;
 198         } key_usage_data[] ={
 199         {"digitalSignature",    X509v3_KU_DIGITAL_SIGNATURE},
 200         {"nonRepudiation",      X509v3_KU_NON_REPUDIATION},
 201         {"keyEncipherment",     X509v3_KU_KEY_ENCIPHERMENT},
 202         {"dataEncipherment",    X509v3_KU_DATA_ENCIPHERMENT},
 203         {"keyAgreement",        X509v3_KU_KEY_AGREEMENT},
 204         {"keyCertSign",         X509v3_KU_KEY_CERT_SIGN},
 205         {"cRLSign",             X509v3_KU_CRL_SIGN},
 206         {"encipherOnly",        X509v3_KU_ENCIPHER_ONLY},
 207         {"decipherOnly",        X509v3_KU_DECIPHER_ONLY},
 208         {NULL,0},
 209         };
 210
 211 #if 0
 212 static int a2i_key_usage(x,str,len)
 213 X509 *x;
 214 char *str;
 215 int len;
 216         {
 217         return(X509v3_set_key_usage(x,a2i_X509v3_key_usage(str)));
 218         }
 219
 220 static int i2a_key_usage(bp,x)
 221 BIO *bp;
 222 X509 *x;
 223         {
 224         return(i2a_X509v3_key_usage(bp,X509v3_get_key_usage(x)));
 225         }
 226 #endif
 227
 228 int i2a_X509v3_key_usage(bp,use)
 229 BIO *bp;
 230 unsigned int use;
 231         {
 232         int i=0,first=1;
 233
 234         for (;;)
 235                 {
 236                 if (use | key_usage_data[i].value)
 237                         {
 238                         BIO_printf(bp,"%s%s",((first)?"":" "),
 239                                 key_usage_data[i].name);
 240                         first=0;
 241                         }
 242                 }
 243         return(1);
 244         }
 245
 246 unsigned int a2i_X509v3_key_usage(p)
 247 char *p;
 248         {
 249         unsigned int ret=0;
 250         char *q,*s;
 251         int i,n;
 252
 253         q=p;
 254         for (;;)
 255                 {
 256                 while ((*q != '\0') && isalnum(*q))
 257                         q++;
 258                 if (*q == '\0') break;
 259                 s=q++;
 260                 while (isalnum(*q))
 261                         q++;
 262                 n=q-s;
 263                 i=0;
 264                 for (;;)
 265                         {
 266                         if (strncmp(key_usage_data[i].name,s,n) == 0)
 267                                 {
 268                                 ret|=key_usage_data[i].value;
 269                                 break;
 270                                 }
 271                         i++;
 272                         if (key_usage_data[i].name == NULL)
 273                                 return(X509v3_KU_UNDEF);
 274                         }
 275                 }
 276         return(ret);
 277         }
 278
 279 int X509v3_set_key_usage(x,use)
 280 X509 *x;
 281 unsigned int use;
 282         {
 283         ASN1_OCTET_STRING *os;
 284         X509_EXTENSION *ext;
 285         int i;
 286         unsigned char data[4];
 287
 288         i=X509_get_ext_by_NID(x,NID_key_usage,-1);
 289         if (i < 0)
 290                 {
 291                 i=X509_get_ext_count(x)+1;
 292                 if ((ext=X509_EXTENSION_new()) == NULL) return(0);
 293                 if (!X509_add_ext(x,ext,i))
 294                         {
 295                         X509_EXTENSION_free(ext);
 296                         return(0);
 297                         }
 298                 }
 299         else
 300                 ext=X509_get_ext(x,i);
 301
 302         /* fill in 'ext' */
 303         os=X509_EXTENSION_get_data(ext);
 304
 305         i=0;
 306         if (use > 0)
 307                 {
 308                 i=1;
 309                 data[0]=use&0xff;
 310                 }
 311         if (use > 0xff)
 312                 {
 313                 i=2;
 314                 data[1]=(use>>8)&0xff;
 315                 }
 316         return((X509v3_pack_string(&os,V_ASN1_BIT_STRING,data,i) == NULL)?0:1);
 317         }
 318