| /* |
| * C implementation based on the original Perl and shell versions |
| * |
| * Copyright (c) 2013-2014 Timo Teräs <timo.teras@iki.fi> |
| * All rights reserved. |
| */ |
| /* ==================================================================== |
| * Copyright (c) 2015 The OpenSSL Project. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. All advertising materials mentioning features or use of this |
| * software must display the following acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| * |
| * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| * endorse or promote products derived from this software without |
| * prior written permission. For written permission, please contact |
| * licensing@OpenSSL.org. |
| * |
| * 5. Products derived from this software may not be called "OpenSSL" |
| * nor may "OpenSSL" appear in their names without prior written |
| * permission of the OpenSSL Project. |
| * |
| * 6. Redistributions of any form whatsoever must retain the following |
| * acknowledgment: |
| * "This product includes software developed by the OpenSSL Project |
| * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| * OF THE POSSIBILITY OF SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This product includes cryptographic software written by Eric Young |
| * (eay@cryptsoft.com). This product includes software written by Tim |
| * Hudson (tjh@cryptsoft.com). |
| * |
| */ |
| |
| #include "apps.h" |
| |
| #ifdef unix |
| # include <unistd.h> |
| # include <stdio.h> |
| # include <limits.h> |
| # include <errno.h> |
| # include <string.h> |
| # include <ctype.h> |
| # include <sys/stat.h> |
| |
| # include "internal/o_dir.h" |
| # include <openssl/evp.h> |
| # include <openssl/pem.h> |
| # include <openssl/x509.h> |
| |
| |
| # define MAX_COLLISIONS 256 |
| |
| typedef struct hentry_st { |
| struct hentry_st *next; |
| char *filename; |
| unsigned short old_id; |
| unsigned char need_symlink; |
| unsigned char digest[EVP_MAX_MD_SIZE]; |
| } HENTRY; |
| |
| typedef struct bucket_st { |
| struct bucket_st *next; |
| HENTRY *first_entry, *last_entry; |
| unsigned int hash; |
| unsigned short type; |
| unsigned short num_needed; |
| } BUCKET; |
| |
| enum Type { |
| /* Keep in sync with |suffixes|, below. */ |
| TYPE_CERT=0, TYPE_CRL=1 |
| }; |
| |
| enum Hash { |
| HASH_OLD, HASH_NEW, HASH_BOTH |
| }; |
| |
| |
| static int evpmdsize; |
| static const EVP_MD *evpmd; |
| static int remove_links = 1; |
| static int verbose = 0; |
| static BUCKET *hash_table[257]; |
| |
| static const char *suffixes[] = { "", "r" }; |
| static const char *extensions[] = { "pem", "crt", "cer", "crl" }; |
| |
| |
| static void bit_set(unsigned char *set, unsigned int bit) |
| { |
| set[bit >> 3] |= 1 << (bit & 0x7); |
| } |
| |
| static int bit_isset(unsigned char *set, unsigned int bit) |
| { |
| return set[bit >> 3] & (1 << (bit & 0x7)); |
| } |
| |
| |
| static void add_entry(enum Type type, unsigned int hash, const char *filename, |
| const unsigned char *digest, int need_symlink, |
| unsigned short old_id) |
| { |
| static BUCKET nilbucket; |
| static HENTRY nilhentry; |
| BUCKET *bp; |
| HENTRY *ep, *found = NULL; |
| unsigned int ndx = (type + hash) % OSSL_NELEM(hash_table); |
| |
| for (bp = hash_table[ndx]; bp; bp = bp->next) |
| if (bp->type == type && bp->hash == hash) |
| break; |
| if (bp == NULL) { |
| bp = app_malloc(sizeof(*bp), "hash bucket"); |
| *bp = nilbucket; |
| bp->next = hash_table[ndx]; |
| bp->type = type; |
| bp->hash = hash; |
| hash_table[ndx] = bp; |
| } |
| |
| for (ep = bp->first_entry; ep; ep = ep->next) { |
| if (digest && memcmp(digest, ep->digest, evpmdsize) == 0) { |
| BIO_printf(bio_err, |
| "%s: skipping duplicate certificate in %s\n", |
| opt_getprog(), filename); |
| return; |
| } |
| if (strcmp(filename, ep->filename) == 0) { |
| found = ep; |
| if (digest == NULL) |
| break; |
| } |
| } |
| ep = found; |
| if (ep == NULL) { |
| if (bp->num_needed >= MAX_COLLISIONS) |
| return; |
| ep = app_malloc(sizeof(*ep), "collision bucket"); |
| *ep = nilhentry; |
| ep->old_id = ~0; |
| ep->filename = BUF_strdup(filename); |
| if (bp->last_entry) |
| bp->last_entry->next = ep; |
| if (bp->first_entry == NULL) |
| bp->first_entry = ep; |
| bp->last_entry = ep; |
| } |
| |
| if (old_id < ep->old_id) |
| ep->old_id = old_id; |
| if (need_symlink && !ep->need_symlink) { |
| ep->need_symlink = 1; |
| bp->num_needed++; |
| memcpy(ep->digest, digest, evpmdsize); |
| } |
| } |
| |
| static int handle_symlink(const char *filename, const char *fullpath) |
| { |
| unsigned int hash = 0; |
| int i, type, id; |
| unsigned char ch; |
| char linktarget[NAME_MAX], *endptr; |
| ssize_t n; |
| |
| for (i = 0; i < 8; i++) { |
| ch = filename[i]; |
| if (!isxdigit(ch)) |
| return -1; |
| hash <<= 4; |
| hash += app_hex(ch); |
| } |
| if (filename[i++] != '.') |
| return -1; |
| for (type = OSSL_NELEM(suffixes) - 1; type > 0; type--) |
| if (strcasecmp(suffixes[type], &filename[i]) == 0) |
| break; |
| i += strlen(suffixes[type]); |
| |
| id = strtoul(&filename[i], &endptr, 10); |
| if (*endptr != '\0') |
| return -1; |
| |
| n = readlink(fullpath, linktarget, sizeof(linktarget)); |
| if (n < 0 || n >= (int)sizeof(linktarget)) |
| return -1; |
| linktarget[n] = 0; |
| |
| add_entry(type, hash, linktarget, NULL, 0, id); |
| return 0; |
| } |
| |
| static int do_file(const char *filename, const char *fullpath, enum Hash h) |
| { |
| STACK_OF (X509_INFO) *inf; |
| X509_INFO *x; |
| X509_NAME *name = NULL; |
| BIO *b; |
| const char *ext; |
| unsigned char digest[EVP_MAX_MD_SIZE]; |
| int i, type, ret = -1; |
| |
| if ((ext = strrchr(filename, '.')) == NULL) |
| return 0; |
| for (i = 0; i < (int)OSSL_NELEM(extensions); i++) { |
| if (strcasecmp(extensions[i], ext + 1) == 0) |
| break; |
| } |
| if (i >= (int)OSSL_NELEM(extensions)) |
| return -1; |
| |
| if ((b = BIO_new_file(fullpath, "r")) == NULL) |
| return -1; |
| inf = PEM_X509_INFO_read_bio(b, NULL, NULL, NULL); |
| BIO_free(b); |
| if (inf == NULL) |
| return -1; |
| |
| if (sk_X509_INFO_num(inf) != 1) { |
| BIO_printf(bio_err, |
| "%s: skipping %s," |
| "it does not contain exactly one certificate or CRL\n", |
| opt_getprog(), filename); |
| goto end; |
| } |
| x = sk_X509_INFO_value(inf, 0); |
| if (x->x509) { |
| type = TYPE_CERT; |
| name = X509_get_subject_name(x->x509); |
| X509_digest(x->x509, evpmd, digest, NULL); |
| } else if (x->crl) { |
| type = TYPE_CRL; |
| name = X509_CRL_get_issuer(x->crl); |
| X509_CRL_digest(x->crl, evpmd, digest, NULL); |
| } |
| if (name) { |
| if ((h == HASH_NEW) || (h == HASH_BOTH)) |
| add_entry(type, X509_NAME_hash(name), filename, digest, 1, ~0); |
| if ((h == HASH_OLD) || (h == HASH_BOTH)) |
| add_entry(type, X509_NAME_hash_old(name), filename, digest, 1, ~0); |
| } |
| |
| end: |
| sk_X509_INFO_pop_free(inf, X509_INFO_free); |
| return ret; |
| } |
| |
| static int do_dir(const char *dirname, enum Hash h) |
| { |
| BUCKET *bp, *nextbp; |
| HENTRY *ep, *nextep; |
| OPENSSL_DIR_CTX *d = NULL; |
| struct stat st; |
| unsigned char idmask[MAX_COLLISIONS / 8]; |
| int i, n, nextid, buflen, ret = -1; |
| const char *pathsep; |
| const char *filename; |
| char *buf; |
| |
| buflen = strlen(dirname); |
| pathsep = (buflen && dirname[buflen - 1] == '/') ? "" : "/"; |
| buflen += NAME_MAX + 2; |
| buf = app_malloc(buflen, "filename buffer"); |
| |
| if (verbose) |
| BIO_printf(bio_out, "Doing %s\n", dirname); |
| |
| while ((filename = OPENSSL_DIR_read(&d, dirname)) != NULL) { |
| if (snprintf(buf, buflen, "%s%s%s", |
| dirname, pathsep, filename) >= buflen) |
| continue; |
| if (lstat(buf, &st) < 0) |
| continue; |
| if (S_ISLNK(st.st_mode) && handle_symlink(filename, buf) == 0) |
| continue; |
| do_file(filename, buf, h); |
| } |
| OPENSSL_DIR_end(&d); |
| |
| for (i = 0; i < (int)OSSL_NELEM(hash_table); i++) { |
| for (bp = hash_table[i]; bp; bp = nextbp) { |
| nextbp = bp->next; |
| nextid = 0; |
| memset(idmask, 0, (bp->num_needed + 7) / 8); |
| for (ep = bp->first_entry; ep; ep = ep->next) |
| if (ep->old_id < bp->num_needed) |
| bit_set(idmask, ep->old_id); |
| |
| for (ep = bp->first_entry; ep; ep = nextep) { |
| nextep = ep->next; |
| if (ep->old_id < bp->num_needed) { |
| /* Link exists, and is used as-is */ |
| snprintf(buf, buflen, "%08x.%s%d", bp->hash, |
| suffixes[bp->type], ep->old_id); |
| if (verbose) |
| BIO_printf(bio_out, "link %s -> %s\n", |
| ep->filename, buf); |
| } else if (ep->need_symlink) { |
| /* New link needed (it may replace something) */ |
| while (bit_isset(idmask, nextid)) |
| nextid++; |
| |
| snprintf(buf, buflen, "%s%s%n%08x.%s%d", |
| dirname, pathsep, &n, bp->hash, |
| suffixes[bp->type], nextid); |
| if (verbose) |
| BIO_printf(bio_out, "link %s -> %s\n", |
| ep->filename, &buf[n]); |
| if (unlink(buf) < 0 && errno != ENOENT) |
| BIO_printf(bio_err, |
| "%s: Can't unlink %s, %s\n", |
| opt_getprog(), buf, strerror(errno)); |
| if (symlink(ep->filename, buf) < 0) |
| BIO_printf(bio_err, |
| "%s: Can't symlink %s, %s\n", |
| opt_getprog(), ep->filename, |
| strerror(errno)); |
| } else if (remove_links) { |
| /* Link to be deleted */ |
| snprintf(buf, buflen, "%s%s%n%08x.%s%d", |
| dirname, pathsep, &n, bp->hash, |
| suffixes[bp->type], ep->old_id); |
| if (verbose) |
| BIO_printf(bio_out, "unlink %s\n", |
| &buf[n]); |
| if (unlink(buf) < 0 && errno != ENOENT) |
| BIO_printf(bio_err, |
| "%s: Can't unlink %s, %s\n", |
| opt_getprog(), buf, strerror(errno)); |
| } |
| OPENSSL_free(ep->filename); |
| OPENSSL_free(ep); |
| } |
| OPENSSL_free(bp); |
| } |
| hash_table[i] = NULL; |
| } |
| ret = 0; |
| |
| OPENSSL_free(buf); |
| return ret; |
| } |
| |
| typedef enum OPTION_choice { |
| OPT_ERR = -1, OPT_EOF = 0, OPT_HELP, |
| OPT_COMPAT, OPT_OLD, OPT_N, OPT_VERBOSE |
| } OPTION_CHOICE; |
| |
| OPTIONS rehash_options[] = { |
| {OPT_HELP_STR, 1, '-', "Usage: %s [options] [cert-directory...]\n"}, |
| {OPT_HELP_STR, 1, '-', "Valid options are:\n"}, |
| {"help", OPT_HELP, '-', "Display this summary"}, |
| {"compat", OPT_COMPAT, '-', "Create both new- and old-style hash links"}, |
| {"old", OPT_OLD, '-', "Use old-style hash to generate links"}, |
| {"n", OPT_N, '-', "Do not remove existing links"}, |
| {"v", OPT_VERBOSE, '-', "Verbose output"}, |
| {NULL} |
| }; |
| |
| |
| int rehash_main(int argc, char **argv) |
| { |
| const char *env, *prog; |
| char *e, *m; |
| int ret = 0; |
| OPTION_CHOICE o; |
| enum Hash h = HASH_NEW; |
| |
| prog = opt_init(argc, argv, rehash_options); |
| while ((o = opt_next()) != OPT_EOF) { |
| switch (o) { |
| case OPT_EOF: |
| case OPT_ERR: |
| BIO_printf(bio_err, "%s: Use -help for summary.\n", prog); |
| goto end; |
| case OPT_HELP: |
| opt_help(rehash_options); |
| goto end; |
| case OPT_COMPAT: |
| h = HASH_BOTH; |
| break; |
| case OPT_OLD: |
| h = HASH_OLD; |
| break; |
| case OPT_N: |
| remove_links = 0; |
| break; |
| case OPT_VERBOSE: |
| verbose = 1; |
| break; |
| } |
| } |
| argc = opt_num_rest(); |
| argv = opt_rest(); |
| |
| evpmd = EVP_sha1(); |
| evpmdsize = EVP_MD_size(evpmd); |
| |
| if (*argv) { |
| while (*argv) |
| ret |= do_dir(*argv++, h); |
| } else if ((env = getenv("SSL_CERT_DIR")) != NULL) { |
| m = BUF_strdup(env); |
| for (e = strtok(m, ":"); e != NULL; e = strtok(NULL, ":")) |
| ret |= do_dir(e, h); |
| OPENSSL_free(m); |
| } else { |
| ret |= do_dir("/etc/ssl/certs", h); |
| } |
| |
| end: |
| return ret ? 2 : 0; |
| } |
| |
| #else |
| |
| int rehash_main(int argc, char **argv) |
| { |
| BIO_printf(bio_err, "Not available; use c_rehash script\n"); |
| return (1); |
| } |
| |
| #endif |
