541 lines
15 KiB
C
541 lines
15 KiB
C
/*
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* Copyright 2015-2020 The OpenSSL Project Authors. All Rights Reserved.
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* Copyright (c) 2013-2014 Timo Teräs <timo.teras@gmail.com>
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include "apps.h"
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#include "progs.h"
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#if defined(OPENSSL_SYS_UNIX) || defined(__APPLE__) || \
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(defined(__VMS) && defined(__DECC) && __CRTL_VER >= 80300000)
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# include <unistd.h>
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# include <stdio.h>
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# include <limits.h>
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# include <errno.h>
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# include <string.h>
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# include <ctype.h>
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# include <sys/stat.h>
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/*
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* Make sure that the processing of symbol names is treated the same as when
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* libcrypto is built. This is done automatically for public headers (see
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* include/openssl/__DECC_INCLUDE_PROLOGUE.H and __DECC_INCLUDE_EPILOGUE.H),
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* but not for internal headers.
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*/
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# ifdef __VMS
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# pragma names save
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# pragma names as_is,shortened
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# endif
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# include "internal/o_dir.h"
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# ifdef __VMS
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# pragma names restore
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# endif
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# include <openssl/evp.h>
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# include <openssl/pem.h>
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# include <openssl/x509.h>
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|
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# ifndef PATH_MAX
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# define PATH_MAX 4096
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# endif
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# ifndef NAME_MAX
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# define NAME_MAX 255
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# endif
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# define MAX_COLLISIONS 256
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# if defined(OPENSSL_SYS_VXWORKS)
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/*
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* VxWorks has no symbolic links
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*/
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# define lstat(path, buf) stat(path, buf)
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int symlink(const char *target, const char *linkpath)
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{
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errno = ENOSYS;
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return -1;
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}
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ssize_t readlink(const char *pathname, char *buf, size_t bufsiz)
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{
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errno = ENOSYS;
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return -1;
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}
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# endif
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typedef struct hentry_st {
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struct hentry_st *next;
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char *filename;
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unsigned short old_id;
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unsigned char need_symlink;
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unsigned char digest[EVP_MAX_MD_SIZE];
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} HENTRY;
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typedef struct bucket_st {
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struct bucket_st *next;
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HENTRY *first_entry, *last_entry;
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unsigned int hash;
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unsigned short type;
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unsigned short num_needed;
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} BUCKET;
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enum Type {
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/* Keep in sync with |suffixes|, below. */
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TYPE_CERT=0, TYPE_CRL=1
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};
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enum Hash {
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HASH_OLD, HASH_NEW, HASH_BOTH
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};
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static int evpmdsize;
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static const EVP_MD *evpmd;
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static int remove_links = 1;
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static int verbose = 0;
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static BUCKET *hash_table[257];
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static const char *suffixes[] = { "", "r" };
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static const char *extensions[] = { "pem", "crt", "cer", "crl" };
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static void bit_set(unsigned char *set, unsigned int bit)
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{
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set[bit >> 3] |= 1 << (bit & 0x7);
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}
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static int bit_isset(unsigned char *set, unsigned int bit)
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{
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return set[bit >> 3] & (1 << (bit & 0x7));
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}
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/*
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* Process an entry; return number of errors.
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*/
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static int add_entry(enum Type type, unsigned int hash, const char *filename,
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const unsigned char *digest, int need_symlink,
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unsigned short old_id)
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{
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static BUCKET nilbucket;
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static HENTRY nilhentry;
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BUCKET *bp;
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HENTRY *ep, *found = NULL;
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unsigned int ndx = (type + hash) % OSSL_NELEM(hash_table);
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for (bp = hash_table[ndx]; bp; bp = bp->next)
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if (bp->type == type && bp->hash == hash)
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break;
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if (bp == NULL) {
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bp = app_malloc(sizeof(*bp), "hash bucket");
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*bp = nilbucket;
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bp->next = hash_table[ndx];
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bp->type = type;
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bp->hash = hash;
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hash_table[ndx] = bp;
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}
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for (ep = bp->first_entry; ep; ep = ep->next) {
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if (digest && memcmp(digest, ep->digest, evpmdsize) == 0) {
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BIO_printf(bio_err,
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"%s: warning: skipping duplicate %s in %s\n",
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opt_getprog(),
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type == TYPE_CERT ? "certificate" : "CRL", filename);
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return 0;
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}
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if (strcmp(filename, ep->filename) == 0) {
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found = ep;
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if (digest == NULL)
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break;
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}
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}
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ep = found;
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if (ep == NULL) {
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if (bp->num_needed >= MAX_COLLISIONS) {
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BIO_printf(bio_err,
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"%s: error: hash table overflow for %s\n",
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opt_getprog(), filename);
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return 1;
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}
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ep = app_malloc(sizeof(*ep), "collision bucket");
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*ep = nilhentry;
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ep->old_id = ~0;
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ep->filename = OPENSSL_strdup(filename);
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if (bp->last_entry)
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bp->last_entry->next = ep;
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if (bp->first_entry == NULL)
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bp->first_entry = ep;
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bp->last_entry = ep;
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}
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if (old_id < ep->old_id)
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ep->old_id = old_id;
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if (need_symlink && !ep->need_symlink) {
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ep->need_symlink = 1;
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bp->num_needed++;
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memcpy(ep->digest, digest, evpmdsize);
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}
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return 0;
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}
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/*
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* Check if a symlink goes to the right spot; return 0 if okay.
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* This can be -1 if bad filename, or an error count.
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*/
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static int handle_symlink(const char *filename, const char *fullpath)
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{
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unsigned int hash = 0;
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int i, type, id;
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unsigned char ch;
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char linktarget[PATH_MAX], *endptr;
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ossl_ssize_t n;
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for (i = 0; i < 8; i++) {
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ch = filename[i];
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if (!isxdigit(ch))
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return -1;
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hash <<= 4;
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hash += OPENSSL_hexchar2int(ch);
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}
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if (filename[i++] != '.')
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return -1;
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for (type = OSSL_NELEM(suffixes) - 1; type > 0; type--) {
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const char *suffix = suffixes[type];
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if (strncasecmp(suffix, &filename[i], strlen(suffix)) == 0)
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break;
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}
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i += strlen(suffixes[type]);
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id = strtoul(&filename[i], &endptr, 10);
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if (*endptr != '\0')
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return -1;
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n = readlink(fullpath, linktarget, sizeof(linktarget));
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if (n < 0 || n >= (int)sizeof(linktarget))
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return -1;
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linktarget[n] = 0;
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return add_entry(type, hash, linktarget, NULL, 0, id);
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}
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/*
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* process a file, return number of errors.
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*/
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static int do_file(const char *filename, const char *fullpath, enum Hash h)
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{
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STACK_OF (X509_INFO) *inf = NULL;
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X509_INFO *x;
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X509_NAME *name = NULL;
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BIO *b;
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const char *ext;
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unsigned char digest[EVP_MAX_MD_SIZE];
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int type, errs = 0;
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size_t i;
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/* Does it end with a recognized extension? */
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if ((ext = strrchr(filename, '.')) == NULL)
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goto end;
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for (i = 0; i < OSSL_NELEM(extensions); i++) {
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if (strcasecmp(extensions[i], ext + 1) == 0)
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break;
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}
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if (i >= OSSL_NELEM(extensions))
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goto end;
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/* Does it have X.509 data in it? */
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if ((b = BIO_new_file(fullpath, "r")) == NULL) {
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BIO_printf(bio_err, "%s: error: skipping %s, cannot open file\n",
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opt_getprog(), filename);
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errs++;
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goto end;
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}
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inf = PEM_X509_INFO_read_bio(b, NULL, NULL, NULL);
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BIO_free(b);
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if (inf == NULL)
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goto end;
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if (sk_X509_INFO_num(inf) != 1) {
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BIO_printf(bio_err,
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"%s: warning: skipping %s,"
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"it does not contain exactly one certificate or CRL\n",
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opt_getprog(), filename);
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/* This is not an error. */
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goto end;
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}
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x = sk_X509_INFO_value(inf, 0);
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if (x->x509 != NULL) {
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type = TYPE_CERT;
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name = X509_get_subject_name(x->x509);
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if (!X509_digest(x->x509, evpmd, digest, NULL)) {
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BIO_printf(bio_err, "out of memory\n");
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++errs;
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goto end;
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}
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} else if (x->crl != NULL) {
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type = TYPE_CRL;
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name = X509_CRL_get_issuer(x->crl);
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if (!X509_CRL_digest(x->crl, evpmd, digest, NULL)) {
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BIO_printf(bio_err, "out of memory\n");
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++errs;
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goto end;
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}
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} else {
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++errs;
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goto end;
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}
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if (name != NULL) {
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if ((h == HASH_NEW) || (h == HASH_BOTH))
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errs += add_entry(type, X509_NAME_hash(name), filename, digest, 1, ~0);
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if ((h == HASH_OLD) || (h == HASH_BOTH))
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errs += add_entry(type, X509_NAME_hash_old(name), filename, digest, 1, ~0);
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}
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end:
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sk_X509_INFO_pop_free(inf, X509_INFO_free);
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return errs;
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}
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static void str_free(char *s)
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{
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OPENSSL_free(s);
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}
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static int ends_with_dirsep(const char *path)
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{
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if (*path != '\0')
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path += strlen(path) - 1;
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# if defined __VMS
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if (*path == ']' || *path == '>' || *path == ':')
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return 1;
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# elif defined _WIN32
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if (*path == '\\')
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return 1;
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# endif
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return *path == '/';
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}
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/*
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* Process a directory; return number of errors found.
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*/
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static int do_dir(const char *dirname, enum Hash h)
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{
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BUCKET *bp, *nextbp;
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HENTRY *ep, *nextep;
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OPENSSL_DIR_CTX *d = NULL;
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struct stat st;
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unsigned char idmask[MAX_COLLISIONS / 8];
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int n, numfiles, nextid, buflen, errs = 0;
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size_t i;
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const char *pathsep;
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const char *filename;
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char *buf, *copy = NULL;
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STACK_OF(OPENSSL_STRING) *files = NULL;
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if (app_access(dirname, W_OK) < 0) {
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BIO_printf(bio_err, "Skipping %s, can't write\n", dirname);
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return 1;
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}
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buflen = strlen(dirname);
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pathsep = (buflen && !ends_with_dirsep(dirname)) ? "/": "";
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buflen += NAME_MAX + 1 + 1;
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buf = app_malloc(buflen, "filename buffer");
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|
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if (verbose)
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BIO_printf(bio_out, "Doing %s\n", dirname);
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|
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if ((files = sk_OPENSSL_STRING_new_null()) == NULL) {
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BIO_printf(bio_err, "Skipping %s, out of memory\n", dirname);
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errs = 1;
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goto err;
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}
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while ((filename = OPENSSL_DIR_read(&d, dirname)) != NULL) {
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if ((copy = OPENSSL_strdup(filename)) == NULL
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|| sk_OPENSSL_STRING_push(files, copy) == 0) {
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OPENSSL_free(copy);
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BIO_puts(bio_err, "out of memory\n");
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errs = 1;
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goto err;
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}
|
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}
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OPENSSL_DIR_end(&d);
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sk_OPENSSL_STRING_sort(files);
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|
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numfiles = sk_OPENSSL_STRING_num(files);
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for (n = 0; n < numfiles; ++n) {
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filename = sk_OPENSSL_STRING_value(files, n);
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if (BIO_snprintf(buf, buflen, "%s%s%s",
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dirname, pathsep, filename) >= buflen)
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continue;
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if (lstat(buf, &st) < 0)
|
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continue;
|
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if (S_ISLNK(st.st_mode) && handle_symlink(filename, buf) == 0)
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continue;
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errs += do_file(filename, buf, h);
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}
|
|
|
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for (i = 0; i < OSSL_NELEM(hash_table); i++) {
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for (bp = hash_table[i]; bp; bp = nextbp) {
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nextbp = bp->next;
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nextid = 0;
|
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memset(idmask, 0, (bp->num_needed + 7) / 8);
|
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for (ep = bp->first_entry; ep; ep = ep->next)
|
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if (ep->old_id < bp->num_needed)
|
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bit_set(idmask, ep->old_id);
|
|
|
|
for (ep = bp->first_entry; ep; ep = nextep) {
|
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nextep = ep->next;
|
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if (ep->old_id < bp->num_needed) {
|
|
/* Link exists, and is used as-is */
|
|
BIO_snprintf(buf, buflen, "%08x.%s%d", bp->hash,
|
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suffixes[bp->type], ep->old_id);
|
|
if (verbose)
|
|
BIO_printf(bio_out, "link %s -> %s\n",
|
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ep->filename, buf);
|
|
} else if (ep->need_symlink) {
|
|
/* New link needed (it may replace something) */
|
|
while (bit_isset(idmask, nextid))
|
|
nextid++;
|
|
|
|
BIO_snprintf(buf, buflen, "%s%s%n%08x.%s%d",
|
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dirname, pathsep, &n, bp->hash,
|
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suffixes[bp->type], nextid);
|
|
if (verbose)
|
|
BIO_printf(bio_out, "link %s -> %s\n",
|
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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 */
|
|
BIO_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;
|
|
}
|
|
|
|
err:
|
|
sk_OPENSSL_STRING_pop_free(files, str_free);
|
|
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;
|
|
|
|
const 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 != NULL) {
|
|
while (*argv != NULL)
|
|
errs += do_dir(*argv++, h);
|
|
} else if ((env = getenv(X509_get_default_cert_dir_env())) != NULL) {
|
|
char lsc[2] = { LIST_SEPARATOR_CHAR, '\0' };
|
|
m = OPENSSL_strdup(env);
|
|
for (e = strtok(m, lsc); e != NULL; e = strtok(NULL, lsc))
|
|
errs += do_dir(e, h);
|
|
OPENSSL_free(m);
|
|
} else {
|
|
errs += do_dir(X509_get_default_cert_dir(), h);
|
|
}
|
|
|
|
end:
|
|
return errs;
|
|
}
|
|
|
|
#else
|
|
const 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__) */
|