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 #ifdef MAC_OS_pre_X
  69 # include <stat.h>
  70 #else
  71 # include <sys/stat.h>
  72 #endif
  73
  74 #include <openssl/lhash.h>
  75 #include <openssl/x509.h>
  76
  77 #ifdef _WIN32
  78 # define stat    _stat
  79 #endif
  80
  81 typedef struct lookup_dir_st {
  82     BUF_MEM *buffer;
  83     int num_dirs;
  84     char **dirs;
  85     int *dirs_type;
  86     int num_dirs_alloced;
  87 } BY_DIR;
  88
  89 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
  90                     char **ret);
  91 static int new_dir(X509_LOOKUP *lu);
  92 static void free_dir(X509_LOOKUP *lu);
  93 static int add_cert_dir(BY_DIR *ctx, const char *dir, int type);
  94 static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
  95                                X509_OBJECT *ret);
  96 X509_LOOKUP_METHOD x509_dir_lookup = {
  97     "Load certs from files in a directory",
  98     new_dir,                    /* new */
  99     free_dir,                   /* free */
 100     NULL,                       /* init */
 101     NULL,                       /* shutdown */
 102     dir_ctrl,                   /* ctrl */
 103     get_cert_by_subject,        /* get_by_subject */
 104     NULL,                       /* get_by_issuer_serial */
 105     NULL,                       /* get_by_fingerprint */
 106     NULL,                       /* get_by_alias */
 107 };
 108
 109 X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
 110 {
 111     return (&x509_dir_lookup);
 112 }
 113
 114 static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
 115                     char **retp)
 116 {
 117     int ret = 0;
 118     BY_DIR *ld;
 119     char *dir = NULL;
 120
 121     ld = (BY_DIR *)ctx->method_data;
 122
 123     switch (cmd) {
 124     case X509_L_ADD_DIR:
 125         if (argl == X509_FILETYPE_DEFAULT) {
 126             dir = (char *)Getenv(X509_get_default_cert_dir_env());
 127             if (dir)
 128                 ret = add_cert_dir(ld, dir, X509_FILETYPE_PEM);
 129             else
 130                 ret = add_cert_dir(ld, X509_get_default_cert_dir(),
 131                                    X509_FILETYPE_PEM);
 132             if (!ret) {
 133                 X509err(X509_F_DIR_CTRL, X509_R_LOADING_CERT_DIR);
 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         OPENSSL_free(a);
 150         return (0);
 151     }
 152     a->num_dirs = 0;
 153     a->dirs = NULL;
 154     a->dirs_type = NULL;
 155     a->num_dirs_alloced = 0;
 156     lu->method_data = (char *)a;
 157     return (1);
 158 }
 159
 160 static void free_dir(X509_LOOKUP *lu)
 161 {
 162     BY_DIR *a;
 163     int i;
 164
 165     a = (BY_DIR *)lu->method_data;
 166     for (i = 0; i < a->num_dirs; i++)
 167         if (a->dirs[i] != NULL)
 168             OPENSSL_free(a->dirs[i]);
 169     if (a->dirs != NULL)
 170         OPENSSL_free(a->dirs);
 171     if (a->dirs_type != NULL)
 172         OPENSSL_free(a->dirs_type);
 173     if (a->buffer != NULL)
 174         BUF_MEM_free(a->buffer);
 175     OPENSSL_free(a);
 176 }
 177
 178 static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
 179 {
 180     int j, len;
 181     int *ip;
 182     const char *s, *ss, *p;
 183     char **pp;
 184
 185     if (dir == NULL || !*dir) {
 186         X509err(X509_F_ADD_CERT_DIR, X509_R_INVALID_DIRECTORY);
 187         return 0;
 188     }
 189
 190     s = dir;
 191     p = s;
 192     for (;; p++) {
 193         if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0')) {
 194             ss = s;
 195             s = p + 1;
 196             len = (int)(p - ss);
 197             if (len == 0)
 198                 continue;
 199             for (j = 0; j < ctx->num_dirs; j++)
 200                 if (strlen(ctx->dirs[j]) == (size_t)len &&
 201                     strncmp(ctx->dirs[j], ss, (unsigned int)len) == 0)
 202                     break;
 203             if (j < ctx->num_dirs)
 204                 continue;
 205             if (ctx->num_dirs_alloced < (ctx->num_dirs + 1)) {
 206                 ctx->num_dirs_alloced += 10;
 207                 pp = (char **)OPENSSL_malloc(ctx->num_dirs_alloced *
 208                                              sizeof(char *));
 209                 ip = (int *)OPENSSL_malloc(ctx->num_dirs_alloced *
 210                                            sizeof(int));
 211                 if ((pp == NULL) || (ip == NULL)) {
 212                     X509err(X509_F_ADD_CERT_DIR, ERR_R_MALLOC_FAILURE);
 213                     return (0);
 214                 }
 215                 memcpy(pp, ctx->dirs, (ctx->num_dirs_alloced - 10) *
 216                        sizeof(char *));
 217                 memcpy(ip, ctx->dirs_type, (ctx->num_dirs_alloced - 10) *
 218                        sizeof(int));
 219                 if (ctx->dirs != NULL)
 220                     OPENSSL_free(ctx->dirs);
 221                 if (ctx->dirs_type != NULL)
 222                     OPENSSL_free(ctx->dirs_type);
 223                 ctx->dirs = pp;
 224                 ctx->dirs_type = ip;
 225             }
 226             ctx->dirs_type[ctx->num_dirs] = type;
 227             ctx->dirs[ctx->num_dirs] =
 228                 (char *)OPENSSL_malloc((unsigned int)len + 1);
 229             if (ctx->dirs[ctx->num_dirs] == NULL)
 230                 return (0);
 231             strncpy(ctx->dirs[ctx->num_dirs], ss, (unsigned int)len);
 232             ctx->dirs[ctx->num_dirs][len] = '\0';
 233             ctx->num_dirs++;
 234         }
 235         if (*p == '\0')
 236             break;
 237     }
 238     return (1);
 239 }
 240
 241 static int get_cert_by_subject(X509_LOOKUP *xl, int type, X509_NAME *name,
 242                                X509_OBJECT *ret)
 243 {
 244     BY_DIR *ctx;
 245     union {
 246         struct {
 247             X509 st_x509;
 248             X509_CINF st_x509_cinf;
 249         } x509;
 250         struct {
 251             X509_CRL st_crl;
 252             X509_CRL_INFO st_crl_info;
 253         } crl;
 254     } data;
 255     int ok = 0;
 256     int i, j, k;
 257     unsigned long h;
 258     BUF_MEM *b = NULL;
 259     struct stat st;
 260     X509_OBJECT stmp, *tmp;
 261     const char *postfix = "";
 262
 263     if (name == NULL)
 264         return (0);
 265
 266     stmp.type = type;
 267     if (type == X509_LU_X509) {
 268         data.x509.st_x509.cert_info = &data.x509.st_x509_cinf;
 269         data.x509.st_x509_cinf.subject = name;
 270         stmp.data.x509 = &data.x509.st_x509;
 271         postfix = "";
 272     } else if (type == X509_LU_CRL) {
 273         data.crl.st_crl.crl = &data.crl.st_crl_info;
 274         data.crl.st_crl_info.issuer = name;
 275         stmp.data.crl = &data.crl.st_crl;
 276         postfix = "r";
 277     } else {
 278         X509err(X509_F_GET_CERT_BY_SUBJECT, X509_R_WRONG_LOOKUP_TYPE);
 279         goto finish;
 280     }
 281
 282     if ((b = BUF_MEM_new()) == NULL) {
 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         j = strlen(ctx->dirs[i]) + 1 + 8 + 6 + 1 + 1;
 292         if (!BUF_MEM_grow(b, j)) {
 293             X509err(X509_F_GET_CERT_BY_SUBJECT, ERR_R_MALLOC_FAILURE);
 294             goto finish;
 295         }
 296         k = 0;
 297         for (;;) {
 298             char c = '/';
 299 #ifdef OPENSSL_SYS_VMS
 300             c = ctx->dirs[i][strlen(ctx->dirs[i]) - 1];
 301             if (c != ':' && c != '>' && c != ']') {
 302                 /*
 303                  * If no separator is present, we assume the directory
 304                  * specifier is a logical name, and add a colon.  We really
 305                  * should use better VMS routines for merging things like
 306                  * this, but this will do for now... -- Richard Levitte
 307                  */
 308                 c = ':';
 309             } else {
 310                 c = '\0';
 311             }
 312 #endif
 313             if (c == '\0') {
 314                 /*
 315                  * This is special.  When c == '\0', no directory separator
 316                  * should be added.
 317                  */
 318                 BIO_snprintf(b->data, b->max,
 319                              "%s%08lx.%s%d", ctx->dirs[i], h, postfix, k);
 320             } else {
 321                 BIO_snprintf(b->data, b->max,
 322                              "%s%c%08lx.%s%d", ctx->dirs[i], c, h,
 323                              postfix, k);
 324             }
 325             k++;
 326             if (stat(b->data, &st) < 0)
 327                 break;
 328             /* found one. */
 329             if (type == X509_LU_X509) {
 330                 if ((X509_load_cert_file(xl, b->data,
 331                                          ctx->dirs_type[i])) == 0)
 332                     break;
 333             } else if (type == X509_LU_CRL) {
 334                 if ((X509_load_crl_file(xl, b->data, ctx->dirs_type[i])) == 0)
 335                     break;
 336             }
 337             /* else case will caught higher up */
 338         }
 339
 340         /*
 341          * we have added it to the cache so now pull it out again
 342          */
 343         CRYPTO_w_lock(CRYPTO_LOCK_X509_STORE);
 344         j = sk_X509_OBJECT_find(xl->store_ctx->objs, &stmp);
 345         if (j != -1)
 346             tmp = sk_X509_OBJECT_value(xl->store_ctx->objs, j);
 347         else
 348             tmp = NULL;
 349         CRYPTO_w_unlock(CRYPTO_LOCK_X509_STORE);
 350
 351         if (tmp != NULL) {
 352             ok = 1;
 353             ret->type = tmp->type;
 354             memcpy(&ret->data, &tmp->data, sizeof(ret->data));
 355             /*
 356              * If we were going to up the reference count, we would need to
 357              * do it on a perl 'type' basis
 358              */
 359         /*-             CRYPTO_add(&tmp->data.x509->references,1,
 360                                 CRYPTO_LOCK_X509);*/
 361             goto finish;
 362         }
 363     }
 364  finish:
 365     if (b != NULL)
 366         BUF_MEM_free(b);
 367     return (ok);
 368 }