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