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