crypto/x509/by_dir.c

   1 /* crypto/x509/by_dir.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 <time.h>
  61 #include <errno.h>
  62
  63 #include "cryptlib.h"
  64
  65 #ifndef NO_SYS_TYPES_H
  66 # include <sys/types.h>
  67 #endif
  68 #ifndef OPENSSL_NO_POSIX_IO
  69 # include <sys/stat.h>
  70 #endif
  71
  72 #include <openssl/lhash.h>
  73 #include <openssl/x509.h>
  74
  75 typedef struct lookup_dir_st
  76         {
  77         BUF_MEM *buffer;
  78         int num_dirs;
  79         char **dirs;
  80         int *dirs_type;
  81         int num_dirs_alloced;
  82         } BY_DIR;
  83
  84 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
  85         char **ret);
  86 static int new_dir(X509_LOOKUP *lu);
  87 static void free_dir(X509_LOOKUP *lu);
  88 static int add_cert_dir(BY_DIR *ctx,const char *dir,int type);
  89 static int get_cert_by_subject(X509_LOOKUP *xl,int type,X509_NAME *name,
  90         X509_OBJECT *ret);
  91 X509_LOOKUP_METHOD x509_dir_lookup=
  92         {
  93         "Load certs from files in a directory",
  94         new_dir,                /* new */
  95         free_dir,               /* free */
  96         NULL,                   /* init */
  97         NULL,                   /* shutdown */
  98         dir_ctrl,               /* ctrl */
  99         get_cert_by_subject,    /* get_by_subject */
 100         NULL,                   /* get_by_issuer_serial */
 101         NULL,                   /* get_by_fingerprint */
 102         NULL,                   /* get_by_alias */
 103         };
 104
 105 X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
 106         {
 107         return(&x509_dir_lookup);
 108         }
 109
 110 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
 111              char **retp)
 112         {
 113         int ret=0;
 114         BY_DIR *ld;
 115         char *dir = NULL;
 116
 117         ld=(BY_DIR *)ctx->method_data;
 118
 119         switch (cmd)
 120                 {
 121         case X509_L_ADD_DIR:
 122                 if (argl == X509_FILETYPE_DEFAULT)
 123                         {
 124                         dir=(char *)getenv(X509_get_default_cert_dir_env());
 125                         if (dir)
 126                                 ret=add_cert_dir(ld,dir,X509_FILETYPE_PEM);
 127                         else
 128                                 ret=add_cert_dir(ld,X509_get_default_cert_dir(),
 129                                         X509_FILETYPE_PEM);
 130                         if (!ret)
 131                                 {
 132                                 X509err(X509_F_DIR_CTRL,X509_R_LOADING_CERT_DIR);
 133                                 }
 134                         }
 135                 else
 136                         ret=add_cert_dir(ld,argp,(int)argl);
 137                 break;
 138                 }
 139         return(ret);
 140         }
 141
 142 static int new_dir(X509_LOOKUP *lu)
 143         {
 144         BY_DIR *a;
 145
 146         if ((a=(BY_DIR *)OPENSSL_malloc(sizeof(BY_DIR))) == NULL)
 147                 return(0);
 148         if ((a->buffer=BUF_MEM_new()) == NULL)
 149                 {
 150                 OPENSSL_free(a);
 151                 return(0);
 152                 }
 153         a->num_dirs=0;
 154         a->dirs=NULL;
 155         a->dirs_type=NULL;
 156         a->num_dirs_alloced=0;
 157         lu->method_data=(char *)a;
 158         return(1);
 159         }
 160
 161 static void free_dir(X509_LOOKUP *lu)
 162         {
 163         BY_DIR *a;
 164         int i;
 165
 166         a=(BY_DIR *)lu->method_data;
 167         for (i=0; i<a->num_dirs; i++)
 168                 if (a->dirs[i] != NULL) OPENSSL_free(a->dirs[i]);
 169         if (a->dirs != NULL) OPENSSL_free(a->dirs);
 170         if (a->dirs_type != NULL) OPENSSL_free(a->dirs_type);
 171         if (a->buffer != NULL) BUF_MEM_free(a->buffer);
 172         OPENSSL_free(a);
 173         }
 174
 175 static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
 176         {
 177         int j,len;
 178         int *ip;
 179         const char *s,*ss,*p;
 180         char **pp;
 181
 182         if (dir == NULL || !*dir)
 183             {
 184             X509err(X509_F_ADD_CERT_DIR,X509_R_INVALID_DIRECTORY);
 185             return 0;
 186             }
 187
 188         s=dir;
 189         p=s;
 190         for (;;)
 191                 {
 192                 if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0'))
 193                         {
 194                         ss=s;
 195                         s=p+1;
 196                         len=(int)(p-ss);
 197                         if (len == 0) continue;
 198                         for (j=0; j<ctx->num_dirs; j++)
 199                                 if (strncmp(ctx->dirs[j],ss,(unsigned int)len) == 0)
 200                                         continue;
 201                         if (ctx->num_dirs_alloced < (ctx->num_dirs+1))
 202                                 {
 203                                 ctx->num_dirs_alloced+=10;
 204                                 pp=(char **)OPENSSL_malloc(ctx->num_dirs_alloced*
 205                                         sizeof(char *));
 206                                 ip=(int *)OPENSSL_malloc(ctx->num_dirs_alloced*
 207                                         sizeof(int));
 208                                 if ((pp == NULL) || (ip == NULL))
 209                                         {
 210                                         X509err(X509_F_ADD_CERT_DIR,ERR_R_MALLOC_FAILURE);
 211                                         return(0);
 212                                         }
 213                                 memcpy(pp,ctx->dirs,(ctx->num_dirs_alloced-10)*
 214                                         sizeof(char *));
 215                                 memcpy(ip,ctx->dirs_type,(ctx->num_dirs_alloced-10)*
 216                                         sizeof(int));
 217                                 if (ctx->dirs != NULL)
 218                                         OPENSSL_free(ctx->dirs);
 219                                 if (ctx->dirs_type != NULL)
 220                                         OPENSSL_free(ctx->dirs_type);
 221                                 ctx->dirs=pp;
 222                                 ctx->dirs_type=ip;
 223                                 }
 224                         ctx->dirs_type[ctx->num_dirs]=type;
 225                         ctx->dirs[ctx->num_dirs]=(char *)OPENSSL_malloc((unsigned int)len+1);
 226                         if (ctx->dirs[ctx->num_dirs] == NULL) return(0);
 227                         strncpy(ctx->dirs[ctx->num_dirs],ss,(unsigned int)len);
 228                         ctx->dirs[ctx->num_dirs][len]='\0';
 229                         ctx->num_dirs++;
 230                         }
 231                 if (*p == '\0') break;
 232                 p++;
 233                 }
 234         return(1);
 235         }
 236
 237 static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
 238              X509_OBJECT *ret)
 239         {
 240         BY_DIR *ctx;
 241         union   {
 242                 struct  {
 243                         X509 st_x509;
 244                         X509_CINF st_x509_cinf;
 245                         } x509;
 246                 struct  {
 247                         X509_CRL st_crl;
 248                         X509_CRL_INFO st_crl_info;
 249                         } crl;
 250                 } data;
 251         int ok=0;
 252         int i,j,k;
 253         unsigned long h;
 254         BUF_MEM *b=NULL;
 255         X509_OBJECT stmp,*tmp;
 256         const char *postfix="";
 257
 258         if (name == NULL) return(0);
 259
 260         stmp.type=type;
 261         if (type == X509_LU_X509)
 262                 {
 263                 data.x509.st_x509.cert_info= &data.x509.st_x509_cinf;
 264                 data.x509.st_x509_cinf.subject=name;
 265                 stmp.data.x509= &data.x509.st_x509;
 266                 postfix="";
 267                 }
 268         else if (type == X509_LU_CRL)
 269                 {
 270                 data.crl.st_crl.crl= &data.crl.st_crl_info;
 271                 data.crl.st_crl_info.issuer=name;
 272                 stmp.data.crl= &data.crl.st_crl;
 273                 postfix="r";
 274                 }
 275         else
 276                 {
 277                 X509err(X509_F_GET_CERT_BY_SUBJECT,X509_R_WRONG_LOOKUP_TYPE);
 278                 goto finish;
 279                 }
 280
 281         if ((b=BUF_MEM_new()) == NULL)
 282                 {
 283                 X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_BUF_LIB);
 284                 goto finish;
 285                 }
 286
 287         ctx=(BY_DIR *)xl->method_data;
 288
 289         h=X509_NAME_hash(name);
 290         for (i=0; i<ctx->num_dirs; i++)
 291                 {
 292                 j=strlen(ctx->dirs[i])+1+8+6+1+1;
 293                 if (!BUF_MEM_grow(b,j))
 294                         {
 295                         X509err(X509_F_GET_CERT_BY_SUBJECT,ERR_R_MALLOC_FAILURE);
 296                         goto finish;
 297                         }
 298                 k=0;
 299                 for (;;)
 300                         {
 301                         char c = '/';
 302 #ifdef OPENSSL_SYS_VMS
 303                         c = ctx->dirs[i][strlen(ctx->dirs[i])-1];
 304                         if (c != ':' && c != '>' && c != ']')
 305                                 {
 306                                 /* If no separator is present, we assume the
 307                                    directory specifier is a logical name, and
 308                                    add a colon.  We really should use better
 309                                    VMS routines for merging things like this,
 310                                    but this will do for now...
 311                                    -- Richard Levitte */
 312                                 c = ':';
 313                                 }
 314                         else
 315                                 {
 316                                 c = '\0';
 317                                 }
 318 #endif
 319                         if (c == '\0')
 320                                 {
 321                                 /* This is special.  When c == '\0', no
 322                                    directory separator should be added. */
 323                                 BIO_snprintf(b->data,b->max,
 324                                         "%s%08lx.%s%d",ctx->dirs[i],h,
 325                                         postfix,k);
 326                                 }
 327                         else
 328                                 {
 329                                 BIO_snprintf(b->data,b->max,
 330                                         "%s%c%08lx.%s%d",ctx->dirs[i],c,h,
 331                                         postfix,k);
 332                                 }
 333                         k++;
 334 #ifndef OPENSSL_NO_POSIX_IO
 335                         {
 336                         struct stat st;
 337                         if (stat(b->data,&st) < 0)
 338                                 break;
 339                         }
 340 #endif
 341                         /* found one. */
 342                         if (type == X509_LU_X509)
 343                                 {
 344                                 if ((X509_load_cert_file(xl,b->data,
 345                                         ctx->dirs_type[i])) == 0)
 346                                         break;
 347                                 }
 348                         else if (type == X509_LU_CRL)
 349                                 {
 350                                 if ((X509_load_crl_file(xl,b->data,
 351                                         ctx->dirs_type[i])) == 0)
 352                                         break;
 353                                 }
 354                         /* else case will caught higher up */
 355                         }
 356
 357                 /* we have added it to the cache so now pull
 358                  * it out again */
 359                 CRYPTO_r_lock(CRYPTO_LOCK_X509_STORE);
 360                 j = sk_X509_OBJECT_find(xl->store_ctx->objs,&stmp);
 361                 if(j != -1) tmp=sk_X509_OBJECT_value(xl->store_ctx->objs,j);
 362                 else tmp = NULL;
 363                 CRYPTO_r_unlock(CRYPTO_LOCK_X509_STORE);
 364
 365                 if (tmp != NULL)
 366                         {
 367                         ok=1;
 368                         ret->type=tmp->type;
 369                         memcpy(&ret->data,&tmp->data,sizeof(ret->data));
 370                         /* If we were going to up the reference count,
 371                          * we would need to do it on a perl 'type'
 372                          * basis */
 373         /*              CRYPTO_add(&tmp->data.x509->references,1,
 374                                 CRYPTO_LOCK_X509);*/
 375                         goto finish;
 376                         }
 377                 }
 378 finish:
 379         if (b != NULL) BUF_MEM_free(b);
 380         return(ok);
 381         }
 382