crypto/x509/v3_x509.c

   1 /* crypto/x509/v3_x509.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 #if 0
  69 static int i2a_key_usage(BIO *bp, X509 *x);
  70 static int a2i_key_usage(X509 *x, char *str, int len);
  71 #endif
  72
  73 int X509v3_get_key_usage(X509 *x);
  74 int X509v3_set_key_usage(X509 *x,unsigned int use);
  75 int i2a_X509v3_key_usage(BIO *bp, unsigned int use);
  76 unsigned int a2i_X509v3_key_usage(char *p);
  77
  78 #define STD_X509_EXT_NUM        9
  79
  80 #if 0
  81 static X509_OBJECTS std_x509_ext[STD_X509_EXT_NUM]={
  82 {NID_subject_key_identifier,    NULL,NULL},
  83 {NID_key_usage,                 a2i_key_usage,i2a_key_usage}, /**/
  84 {NID_private_key_usage_period,  NULL,NULL},
  85 {NID_subject_alt_name,          NULL,NULL},
  86 {NID_issuer_alt_name,           NULL,NULL},
  87 {NID_basic_constraints,         NULL,NULL},
  88 {NID_crl_number,                NULL,NULL},
  89 {NID_certificate_policies,      NULL,NULL},
  90 {NID_authority_key_identifier,  NULL,NULL},
  91         };
  92 #endif
  93
  94 int X509v3_add_standard_extensions()
  95         {
  96
  97 #if 0
  98         for (i=0; i<STD_X509_EXT_NUM; i++)
  99                 if (!X509v3_add_extension(&(std_x509_ext[i])))
 100                         return(0);
 101 #endif
 102         return(1);
 103         }
 104
 105 int X509v3_get_key_usage(x)
 106 X509 *x;
 107         {
 108         X509_EXTENSION *ext;
 109         ASN1_STRING *st;
 110         char *p;
 111         int i;
 112
 113         i=X509_get_ext_by_NID(x,NID_key_usage,-1);
 114         if (i < 0) return(X509v3_KU_UNDEF);
 115         ext=X509_get_ext(x,i);
 116         st=X509v3_unpack_string(NULL,V_ASN1_BIT_STRING,
 117                 X509_EXTENSION_get_data(X509_get_ext(x,i)));
 118
 119         p=(char *)ASN1_STRING_data(st);
 120         if (ASN1_STRING_length(st) == 1)
 121                 i=p[0];
 122         else if (ASN1_STRING_length(st) == 2)
 123                 i=p[0]|(p[1]<<8);
 124         else
 125                 i=0;
 126         return(i);
 127         }
 128
 129 static struct
 130         {
 131         char *name;
 132         unsigned int value;
 133         } key_usage_data[] ={
 134         {"digitalSignature",    X509v3_KU_DIGITAL_SIGNATURE},
 135         {"nonRepudiation",      X509v3_KU_NON_REPUDIATION},
 136         {"keyEncipherment",     X509v3_KU_KEY_ENCIPHERMENT},
 137         {"dataEncipherment",    X509v3_KU_DATA_ENCIPHERMENT},
 138         {"keyAgreement",        X509v3_KU_KEY_AGREEMENT},
 139         {"keyCertSign",         X509v3_KU_KEY_CERT_SIGN},
 140         {"cRLSign",             X509v3_KU_CRL_SIGN},
 141         {"encipherOnly",        X509v3_KU_ENCIPHER_ONLY},
 142         {"decipherOnly",        X509v3_KU_DECIPHER_ONLY},
 143         {NULL,0},
 144         };
 145
 146 #if 0
 147 static int a2i_key_usage(x,str,len)
 148 X509 *x;
 149 char *str;
 150 int len;
 151         {
 152         return(X509v3_set_key_usage(x,a2i_X509v3_key_usage(str)));
 153         }
 154
 155 static int i2a_key_usage(bp,x)
 156 BIO *bp;
 157 X509 *x;
 158         {
 159         return(i2a_X509v3_key_usage(bp,X509v3_get_key_usage(x)));
 160         }
 161 #endif
 162
 163 int i2a_X509v3_key_usage(bp,use)
 164 BIO *bp;
 165 unsigned int use;
 166         {
 167         int i=0,first=1;
 168
 169         for (;;)
 170                 {
 171                 if (use | key_usage_data[i].value)
 172                         {
 173                         BIO_printf(bp,"%s%s",((first)?"":" "),
 174                                 key_usage_data[i].name);
 175                         first=0;
 176                         }
 177                 break;
 178                 }
 179         return(1);
 180         }
 181
 182 unsigned int a2i_X509v3_key_usage(p)
 183 char *p;
 184         {
 185         unsigned int ret=0;
 186         char *q,*s;
 187         int i,n;
 188
 189         q=p;
 190         for (;;)
 191                 {
 192                 while ((*q != '\0') && isalnum(*q))
 193                         q++;
 194                 if (*q == '\0') break;
 195                 s=q++;
 196                 while (isalnum(*q))
 197                         q++;
 198                 n=q-s;
 199                 i=0;
 200                 for (;;)
 201                         {
 202                         if (strncmp(key_usage_data[i].name,s,n) == 0)
 203                                 {
 204                                 ret|=key_usage_data[i].value;
 205                                 break;
 206                                 }
 207                         i++;
 208                         if (key_usage_data[i].name == NULL)
 209                                 return(X509v3_KU_UNDEF);
 210                         }
 211                 }
 212         return(ret);
 213         }
 214
 215 int X509v3_set_key_usage(x,use)
 216 X509 *x;
 217 unsigned int use;
 218         {
 219         ASN1_OCTET_STRING *os;
 220         X509_EXTENSION *ext;
 221         int i;
 222         unsigned char data[4];
 223
 224         i=X509_get_ext_by_NID(x,NID_key_usage,-1);
 225         if (i < 0)
 226                 {
 227                 i=X509_get_ext_count(x)+1;
 228                 if ((ext=X509_EXTENSION_new()) == NULL) return(0);
 229                 if (!X509_add_ext(x,ext,i))
 230                         {
 231                         X509_EXTENSION_free(ext);
 232                         return(0);
 233                         }
 234                 }
 235         else
 236                 ext=X509_get_ext(x,i);
 237
 238         /* fill in 'ext' */
 239         os=X509_EXTENSION_get_data(ext);
 240
 241         i=0;
 242         if (use > 0)
 243                 {
 244                 i=1;
 245                 data[0]=use&0xff;
 246                 }
 247         if (use > 0xff)
 248                 {
 249                 i=2;
 250                 data[1]=(use>>8)&0xff;
 251                 }
 252         return((X509v3_pack_string(&os,V_ASN1_BIT_STRING,data,i) == NULL)?0:1);
 253         }
 254