--- /dev/null
+/*
+ * Copyright 2015-2016 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (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
+ */
+
+/*
+ * C implementation based on the original Perl and shell versions
+ *
+ * Copyright (c) 2013-2014 Timo Teräs <timo.teras@iki.fi>
+ */
+
+#include "apps.h"
+
+#if defined(OPENSSL_SYS_UNIX) || defined(__APPLE__) || \
+ (defined(__VMS) && defined(__DECC) && __CTRL_VER >= 80300000)
+# 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>
+
+
+# ifndef PATH_MAX
+# define PATH_MAX 4096
+# endif
+# ifndef NAME_MAX
+# define NAME_MAX 255
+# endif
+# 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));
+}
+
+
+/*
+ * Process an entry; return number of errors.
+ */
+static int 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 %s in %s\n", opt_getprog(),
+ type == TYPE_CERT ? "certificate" : "CRL", filename);
+ return 1;
+ }
+ if (strcmp(filename, ep->filename) == 0) {
+ found = ep;
+ if (digest == NULL)
+ break;
+ }
+ }
+ ep = found;
+ if (ep == NULL) {
+ if (bp->num_needed >= MAX_COLLISIONS) {
+ BIO_printf(bio_err,
+ "%s: hash table overflow for %s\n",
+ opt_getprog(), filename);
+ return 1;
+ }
+ ep = app_malloc(sizeof(*ep), "collision bucket");
+ *ep = nilhentry;
+ ep->old_id = ~0;
+ ep->filename = OPENSSL_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);
+ }
+ return 0;
+}
+
+/*
+ * Check if a symlink goes to the right spot; return 0 if okay.
+ * This can be -1 if bad filename, or an error count.
+ */
+static int handle_symlink(const char *filename, const char *fullpath)
+{
+ unsigned int hash = 0;
+ int i, type, id;
+ unsigned char ch;
+ char linktarget[PATH_MAX], *endptr;
+ ossl_ssize_t n;
+
+ for (i = 0; i < 8; i++) {
+ ch = filename[i];
+ if (!isxdigit(ch))
+ return -1;
+ hash <<= 4;
+ hash += OPENSSL_hexchar2int(ch);
+ }
+ if (filename[i++] != '.')
+ return -1;
+ for (type = OSSL_NELEM(suffixes) - 1; type > 0; type--) {
+ const char *suffix = suffixes[type];
+ if (strncasecmp(suffix, &filename[i], strlen(suffix)) == 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;
+
+ return add_entry(type, hash, linktarget, NULL, 0, id);
+}
+
+/*
+ * process a file, return number of errors.
+ */
+static int do_file(const char *filename, const char *fullpath, enum Hash h)
+{
+ STACK_OF (X509_INFO) *inf = NULL;
+ X509_INFO *x;
+ X509_NAME *name = NULL;
+ BIO *b;
+ const char *ext;
+ unsigned char digest[EVP_MAX_MD_SIZE];
+ int type, errs = 0;
+ size_t i;
+
+ /* Does it end with a recognized extension? */
+ if ((ext = strrchr(filename, '.')) == NULL)
+ goto end;
+ for (i = 0; i < OSSL_NELEM(extensions); i++) {
+ if (strcasecmp(extensions[i], ext + 1) == 0)
+ break;
+ }
+ if (i >= OSSL_NELEM(extensions))
+ goto end;
+
+ /* Does it have X.509 data in it? */
+ if ((b = BIO_new_file(fullpath, "r")) == NULL) {
+ BIO_printf(bio_err, "%s: skipping %s, cannot open file\n",
+ opt_getprog(), filename);
+ errs++;
+ goto end;
+ }
+ inf = PEM_X509_INFO_read_bio(b, NULL, NULL, NULL);
+ BIO_free(b);
+ if (inf == NULL)
+ goto end;
+
+ 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);
+ /* This is not an error. */
+ 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);
+ } else {
+ ++errs;
+ goto end;
+ }
+ if (name) {
+ if ((h == HASH_NEW) || (h == HASH_BOTH))
+ errs += add_entry(type, X509_NAME_hash(name), filename, digest, 1, ~0);
+ if ((h == HASH_OLD) || (h == HASH_BOTH))
+ errs += add_entry(type, X509_NAME_hash_old(name), filename, digest, 1, ~0);
+ }
+
+end:
+ sk_X509_INFO_pop_free(inf, X509_INFO_free);
+ return errs;
+}
+
+static void str_free(char *s)
+{
+ OPENSSL_free(s);
+}
+
+/*
+ * Process a directory; return number of errors found.
+ */
+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 n, numfiles, nextid, buflen, errs = 0;
+ size_t i;
+ const char *pathsep;
+ const char *filename;
+ char *buf, *copy;
+ STACK_OF(OPENSSL_STRING) *files = NULL;
+
+ if (app_access(dirname, W_OK) < 0) {
+ BIO_printf(bio_err, "Skipping %s, can't write\n", dirname);
+ return 1;
+ }
+ buflen = strlen(dirname);
+ pathsep = (buflen && dirname[buflen - 1] == '/') ? "" : "/";
+ buflen += NAME_MAX + 1 + 1;
+ buf = app_malloc(buflen, "filename buffer");
+
+ if (verbose)
+ BIO_printf(bio_out, "Doing %s\n", dirname);
+
+ if ((files = sk_OPENSSL_STRING_new_null()) == NULL) {
+ BIO_printf(bio_err, "Skipping %s, out of memory\n", dirname);
+ exit(1);
+ }
+ while ((filename = OPENSSL_DIR_read(&d, dirname)) != NULL) {
+ if ((copy = strdup(filename)) == NULL
+ || sk_OPENSSL_STRING_push(files, copy) == 0) {
+ BIO_puts(bio_err, "out of memory\n");
+ exit(1);
+ }
+ }
+ OPENSSL_DIR_end(&d);
+ sk_OPENSSL_STRING_sort(files);
+
+ numfiles = sk_OPENSSL_STRING_num(files);
+ for (n = 0; n < numfiles; ++n) {
+ filename = sk_OPENSSL_STRING_value(files, n);
+ 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;
+ errs += do_file(filename, buf, h);
+ }
+ sk_OPENSSL_STRING_pop_free(files, str_free);
+
+ for (i = 0; i < 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));
+ errs++;
+ }
+ if (symlink(ep->filename, buf) < 0) {
+ BIO_printf(bio_err,
+ "%s: Can't symlink %s, %s\n",
+ opt_getprog(), ep->filename,
+ strerror(errno));
+ errs++;
+ }
+ bit_set(idmask, nextid);
+ } 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));
+ errs++;
+ }
+ }
+ OPENSSL_free(ep->filename);
+ OPENSSL_free(ep);
+ }
+ OPENSSL_free(bp);
+ }
+ hash_table[i] = NULL;
+ }
+
+ OPENSSL_free(buf);
+ return errs;
+}
+
+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"},
+ {"h", 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 errs = 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)
+ errs += do_dir(*argv++, h);
+ } else if ((env = getenv("SSL_CERT_DIR")) != NULL) {
+ m = OPENSSL_strdup(env);
+ for (e = strtok(m, ":"); e != NULL; e = strtok(NULL, ":"))
+ errs += do_dir(e, h);
+ OPENSSL_free(m);
+ } else {
+ errs += do_dir("/etc/ssl/certs", h);
+ }
+
+ end:
+ return errs;
+}
+
+#else
+OPTIONS rehash_options[] = {
+ {NULL}
+};
+
+int rehash_main(int argc, char **argv)
+{
+ BIO_printf(bio_err, "Not available; use c_rehash script\n");
+ return (1);
+}
+
+#endif /* defined(OPENSSL_SYS_UNIX) || defined(__APPLE__) */
projects / cassiopeia.git / blobdiff