diff options
Diffstat (limited to 'openssl-1.1.0h/apps/rehash.c')
| -rw-r--r-- | openssl-1.1.0h/apps/rehash.c | 529 |
1 files changed, 529 insertions, 0 deletions
diff --git a/openssl-1.1.0h/apps/rehash.c b/openssl-1.1.0h/apps/rehash.c new file mode 100644 index 0000000..273ad74 --- /dev/null +++ b/openssl-1.1.0h/apps/rehash.c @@ -0,0 +1,529 @@ +/* + * 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) && __CRTL_VER >= 80300000) +# include <unistd.h> +# include <stdio.h> +# include <limits.h> +# include <errno.h> +# include <string.h> +# include <ctype.h> +# include <sys/stat.h> + +/* + * Make sure that the processing of symbol names is treated the same as when + * libcrypto is built. This is done automatically for public headers (see + * include/openssl/__DECC_INCLUDE_PROLOGUE.H and __DECC_INCLUDE_EPILOGUE.H), + * but not for internal headers. + */ +# ifdef __VMS +# pragma names save +# pragma names as_is,shortened +# endif + +# include "internal/o_dir.h" + +# ifdef __VMS +# pragma names restore +# endif + +# 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); +} + +static int ends_with_dirsep(const char *path) +{ + if (*path != '\0') + path += strlen(path) - 1; +# if defined __VMS + if (*path == ']' || *path == '>' || *path == ':') + return 1; +# elif defined _WIN32 + if (*path == '\\') + return 1; +# endif + return *path == '/'; +} + +static int massage_filename(char *name) +{ +# ifdef __VMS + char *p = strchr(name, ';'); + char *q = p; + + if (q != NULL) { + for (q++; *q != '\0'; q++) { + if (!isdigit((unsigned char)*q)) + return 1; + } + } + + *p = '\0'; +# endif + return 1; +} + +/* + * 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 && !ends_with_dirsep(dirname)) ? "/": ""; + 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 + || !massage_filename(copy) + || 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 (BIO_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 */ + BIO_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++; + + BIO_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 */ + 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; + } + + 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__) */ |