123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438 |
- /*
- * Copyright 1995-2023 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
- #if defined (__TANDEM) && defined (_SPT_MODEL_)
- /*
- * These definitions have to come first in SPT due to scoping of the
- * declarations in c99 associated with SPT use of stat.
- */
- # include <sys/types.h>
- # include <sys/stat.h>
- #endif
- #include "internal/e_os.h"
- #include "internal/cryptlib.h"
- #include <stdio.h>
- #include <time.h>
- #include <errno.h>
- #include <sys/types.h>
- #ifndef OPENSSL_NO_POSIX_IO
- # include <sys/stat.h>
- #endif
- #include <openssl/x509.h>
- #include "crypto/x509.h"
- #include "x509_local.h"
- struct lookup_dir_hashes_st {
- unsigned long hash;
- int suffix;
- };
- struct lookup_dir_entry_st {
- char *dir;
- int dir_type;
- STACK_OF(BY_DIR_HASH) *hashes;
- };
- typedef struct lookup_dir_st {
- BUF_MEM *buffer;
- STACK_OF(BY_DIR_ENTRY) *dirs;
- CRYPTO_RWLOCK *lock;
- } BY_DIR;
- static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
- char **retp);
- static int new_dir(X509_LOOKUP *lu);
- static void free_dir(X509_LOOKUP *lu);
- static int add_cert_dir(BY_DIR *ctx, const char *dir, int type);
- static int get_cert_by_subject(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
- const X509_NAME *name, X509_OBJECT *ret);
- static int get_cert_by_subject_ex(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
- const X509_NAME *name, X509_OBJECT *ret,
- OSSL_LIB_CTX *libctx, const char *propq);
- static X509_LOOKUP_METHOD x509_dir_lookup = {
- "Load certs from files in a directory",
- new_dir, /* new_item */
- free_dir, /* free */
- NULL, /* init */
- NULL, /* shutdown */
- dir_ctrl, /* ctrl */
- get_cert_by_subject, /* get_by_subject */
- NULL, /* get_by_issuer_serial */
- NULL, /* get_by_fingerprint */
- NULL, /* get_by_alias */
- get_cert_by_subject_ex, /* get_by_subject_ex */
- NULL, /* ctrl_ex */
- };
- X509_LOOKUP_METHOD *X509_LOOKUP_hash_dir(void)
- {
- return &x509_dir_lookup;
- }
- static int dir_ctrl(X509_LOOKUP *ctx, int cmd, const char *argp, long argl,
- char **retp)
- {
- int ret = 0;
- BY_DIR *ld = (BY_DIR *)ctx->method_data;
- switch (cmd) {
- case X509_L_ADD_DIR:
- if (argl == X509_FILETYPE_DEFAULT) {
- const char *dir = ossl_safe_getenv(X509_get_default_cert_dir_env());
- if (dir)
- ret = add_cert_dir(ld, dir, X509_FILETYPE_PEM);
- else
- ret = add_cert_dir(ld, X509_get_default_cert_dir(),
- X509_FILETYPE_PEM);
- if (!ret) {
- ERR_raise(ERR_LIB_X509, X509_R_LOADING_CERT_DIR);
- }
- } else
- ret = add_cert_dir(ld, argp, (int)argl);
- break;
- }
- return ret;
- }
- static int new_dir(X509_LOOKUP *lu)
- {
- BY_DIR *a = OPENSSL_malloc(sizeof(*a));
- if (a == NULL)
- return 0;
- if ((a->buffer = BUF_MEM_new()) == NULL) {
- ERR_raise(ERR_LIB_X509, ERR_R_BN_LIB);
- goto err;
- }
- a->dirs = NULL;
- a->lock = CRYPTO_THREAD_lock_new();
- if (a->lock == NULL) {
- BUF_MEM_free(a->buffer);
- ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
- goto err;
- }
- lu->method_data = a;
- return 1;
- err:
- OPENSSL_free(a);
- return 0;
- }
- static void by_dir_hash_free(BY_DIR_HASH *hash)
- {
- OPENSSL_free(hash);
- }
- static int by_dir_hash_cmp(const BY_DIR_HASH *const *a,
- const BY_DIR_HASH *const *b)
- {
- if ((*a)->hash > (*b)->hash)
- return 1;
- if ((*a)->hash < (*b)->hash)
- return -1;
- return 0;
- }
- static void by_dir_entry_free(BY_DIR_ENTRY *ent)
- {
- OPENSSL_free(ent->dir);
- sk_BY_DIR_HASH_pop_free(ent->hashes, by_dir_hash_free);
- OPENSSL_free(ent);
- }
- static void free_dir(X509_LOOKUP *lu)
- {
- BY_DIR *a = (BY_DIR *)lu->method_data;
- sk_BY_DIR_ENTRY_pop_free(a->dirs, by_dir_entry_free);
- BUF_MEM_free(a->buffer);
- CRYPTO_THREAD_lock_free(a->lock);
- OPENSSL_free(a);
- }
- static int add_cert_dir(BY_DIR *ctx, const char *dir, int type)
- {
- int j;
- size_t len;
- const char *s, *ss, *p;
- if (dir == NULL || *dir == '\0') {
- ERR_raise(ERR_LIB_X509, X509_R_INVALID_DIRECTORY);
- return 0;
- }
- s = dir;
- p = s;
- do {
- if ((*p == LIST_SEPARATOR_CHAR) || (*p == '\0')) {
- BY_DIR_ENTRY *ent;
- ss = s;
- s = p + 1;
- len = p - ss;
- if (len == 0)
- continue;
- for (j = 0; j < sk_BY_DIR_ENTRY_num(ctx->dirs); j++) {
- ent = sk_BY_DIR_ENTRY_value(ctx->dirs, j);
- if (strlen(ent->dir) == len && strncmp(ent->dir, ss, len) == 0)
- break;
- }
- if (j < sk_BY_DIR_ENTRY_num(ctx->dirs))
- continue;
- if (ctx->dirs == NULL) {
- ctx->dirs = sk_BY_DIR_ENTRY_new_null();
- if (!ctx->dirs) {
- ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
- return 0;
- }
- }
- ent = OPENSSL_malloc(sizeof(*ent));
- if (ent == NULL)
- return 0;
- ent->dir_type = type;
- ent->hashes = sk_BY_DIR_HASH_new(by_dir_hash_cmp);
- ent->dir = OPENSSL_strndup(ss, len);
- if (ent->dir == NULL || ent->hashes == NULL) {
- by_dir_entry_free(ent);
- return 0;
- }
- if (!sk_BY_DIR_ENTRY_push(ctx->dirs, ent)) {
- by_dir_entry_free(ent);
- ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
- return 0;
- }
- }
- } while (*p++ != '\0');
- return 1;
- }
- static int get_cert_by_subject_ex(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
- const X509_NAME *name, X509_OBJECT *ret,
- OSSL_LIB_CTX *libctx, const char *propq)
- {
- BY_DIR *ctx;
- union {
- X509 st_x509;
- X509_CRL crl;
- } data;
- int ok = 0;
- int i, j, k;
- unsigned long h;
- BUF_MEM *b = NULL;
- X509_OBJECT stmp, *tmp;
- const char *postfix = "";
- if (name == NULL)
- return 0;
- stmp.type = type;
- if (type == X509_LU_X509) {
- data.st_x509.cert_info.subject = (X509_NAME *)name; /* won't modify it */
- stmp.data.x509 = &data.st_x509;
- } else if (type == X509_LU_CRL) {
- data.crl.crl.issuer = (X509_NAME *)name; /* won't modify it */
- stmp.data.crl = &data.crl;
- postfix = "r";
- } else {
- ERR_raise(ERR_LIB_X509, X509_R_WRONG_LOOKUP_TYPE);
- goto finish;
- }
- if ((b = BUF_MEM_new()) == NULL) {
- ERR_raise(ERR_LIB_X509, ERR_R_BUF_LIB);
- goto finish;
- }
- ctx = (BY_DIR *)xl->method_data;
- h = X509_NAME_hash_ex(name, libctx, propq, &i);
- if (i == 0)
- goto finish;
- for (i = 0; i < sk_BY_DIR_ENTRY_num(ctx->dirs); i++) {
- BY_DIR_ENTRY *ent;
- int idx;
- BY_DIR_HASH htmp, *hent;
- ent = sk_BY_DIR_ENTRY_value(ctx->dirs, i);
- j = strlen(ent->dir) + 1 + 8 + 6 + 1 + 1;
- if (!BUF_MEM_grow(b, j)) {
- ERR_raise(ERR_LIB_X509, ERR_R_BUF_LIB);
- goto finish;
- }
- if (type == X509_LU_CRL && ent->hashes) {
- htmp.hash = h;
- if (!CRYPTO_THREAD_read_lock(ctx->lock))
- goto finish;
- idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
- if (idx >= 0) {
- hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
- k = hent->suffix;
- } else {
- hent = NULL;
- k = 0;
- }
- CRYPTO_THREAD_unlock(ctx->lock);
- } else {
- k = 0;
- hent = NULL;
- }
- for (;;) {
- char c = '/';
- #ifdef OPENSSL_SYS_VMS
- c = ent->dir[strlen(ent->dir) - 1];
- if (c != ':' && c != '>' && c != ']') {
- /*
- * If no separator is present, we assume the directory
- * specifier is a logical name, and add a colon. We really
- * should use better VMS routines for merging things like
- * this, but this will do for now... -- Richard Levitte
- */
- c = ':';
- } else {
- c = '\0';
- }
- if (c == '\0') {
- /*
- * This is special. When c == '\0', no directory separator
- * should be added.
- */
- BIO_snprintf(b->data, b->max,
- "%s%08lx.%s%d", ent->dir, h, postfix, k);
- } else
- #endif
- {
- BIO_snprintf(b->data, b->max,
- "%s%c%08lx.%s%d", ent->dir, c, h, postfix, k);
- }
- #ifndef OPENSSL_NO_POSIX_IO
- # ifdef _WIN32
- # define stat _stat
- # endif
- {
- struct stat st;
- if (stat(b->data, &st) < 0)
- break;
- }
- #endif
- /* found one. */
- if (type == X509_LU_X509) {
- if ((X509_load_cert_file_ex(xl, b->data, ent->dir_type, libctx,
- propq)) == 0)
- break;
- } else if (type == X509_LU_CRL) {
- if ((X509_load_crl_file(xl, b->data, ent->dir_type)) == 0)
- break;
- }
- /* else case will caught higher up */
- k++;
- }
- /*
- * we have added it to the cache so now pull it out again
- *
- * Note: quadratic time find here since the objects won't generally be
- * sorted and sorting the would result in O(n^2 log n) complexity.
- */
- if (k > 0) {
- if (!X509_STORE_lock(xl->store_ctx))
- goto finish;
- j = sk_X509_OBJECT_find(xl->store_ctx->objs, &stmp);
- tmp = sk_X509_OBJECT_value(xl->store_ctx->objs, j);
- X509_STORE_unlock(xl->store_ctx);
- } else {
- tmp = NULL;
- }
- /*
- * If a CRL, update the last file suffix added for this.
- * We don't need to add an entry if k is 0 as this is the initial value.
- * This avoids the need for a write lock and sort operation in the
- * simple case where no CRL is present for a hash.
- */
- if (type == X509_LU_CRL && k > 0) {
- if (!CRYPTO_THREAD_write_lock(ctx->lock))
- goto finish;
- /*
- * Look for entry again in case another thread added an entry
- * first.
- */
- if (hent == NULL) {
- htmp.hash = h;
- idx = sk_BY_DIR_HASH_find(ent->hashes, &htmp);
- hent = sk_BY_DIR_HASH_value(ent->hashes, idx);
- }
- if (hent == NULL) {
- hent = OPENSSL_malloc(sizeof(*hent));
- if (hent == NULL) {
- CRYPTO_THREAD_unlock(ctx->lock);
- ok = 0;
- goto finish;
- }
- hent->hash = h;
- hent->suffix = k;
- if (!sk_BY_DIR_HASH_push(ent->hashes, hent)) {
- CRYPTO_THREAD_unlock(ctx->lock);
- OPENSSL_free(hent);
- ERR_raise(ERR_LIB_X509, ERR_R_CRYPTO_LIB);
- ok = 0;
- goto finish;
- }
- /*
- * Ensure stack is sorted so that subsequent sk_BY_DIR_HASH_find
- * will not mutate the stack and therefore require a write lock.
- */
- sk_BY_DIR_HASH_sort(ent->hashes);
- } else if (hent->suffix < k) {
- hent->suffix = k;
- }
- CRYPTO_THREAD_unlock(ctx->lock);
- }
- if (tmp != NULL) {
- ok = 1;
- ret->type = tmp->type;
- memcpy(&ret->data, &tmp->data, sizeof(ret->data));
- /*
- * Clear any errors that might have been raised processing empty
- * or malformed files.
- */
- ERR_clear_error();
- goto finish;
- }
- }
- finish:
- /* If we changed anything, resort the objects for faster lookup */
- if (!sk_X509_OBJECT_is_sorted(xl->store_ctx->objs)) {
- if (X509_STORE_lock(xl->store_ctx)) {
- sk_X509_OBJECT_sort(xl->store_ctx->objs);
- X509_STORE_unlock(xl->store_ctx);
- }
- }
- BUF_MEM_free(b);
- return ok;
- }
- static int get_cert_by_subject(X509_LOOKUP *xl, X509_LOOKUP_TYPE type,
- const X509_NAME *name, X509_OBJECT *ret)
- {
- return get_cert_by_subject_ex(xl, type, name, ret, NULL, NULL);
- }
|