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