[thirdparty/openssl.git] / apps / rehash.c

/*
 * C implementation based on the original Perl and shell versions
 *
 * Copyright (c) 2013-2014 Timo Teräs <timo.teras@iki.fi>
 */
/* ====================================================================
 * 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"

#if defined(unix) || defined(__APPLE__)
# 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));
}


/*
 * 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 certificate in %s\n",
                       opt_getprog(), 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 = 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);
    }
    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[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;

    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 i, type, errs = 0;

    /* Does it end with a recognized extension? */
    if ((ext = strrchr(filename, '.')) == NULL)
        goto end;
    for (i = 0; i < (int)OSSL_NELEM(extensions); i++) {
        if (strcasecmp(extensions[i], ext + 1) == 0)
            break;
    }
    if (i >= (int)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);
    }
    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;
}

/*
 * 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 i, n, nextid, buflen, errs = 0;
    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;
        errs += 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));
                        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++;
                    }
                } 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"},
    {"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 = BUF_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(unix) || defined(__APPLE__) */
Commit	Line	Data
8f6f1441 TT	1	/*
	2	* C implementation based on the original Perl and shell versions
	3	*
	4	* Copyright (c) 2013-2014 Timo Teräs <timo.teras@iki.fi>
8f6f1441 TT	5	*/
	6	/* ====================================================================
	7	* Copyright (c) 2015 The OpenSSL Project. All rights reserved.
	8	*
	9	* Redistribution and use in source and binary forms, with or without
	10	* modification, are permitted provided that the following conditions
	11	* are met:
	12	*
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	*
	16	* 2. Redistributions in binary form must reproduce the above copyright
	17	* notice, this list of conditions and the following disclaimer in
	18	* the documentation and/or other materials provided with the
	19	* distribution.
	20	*
	21	* 3. All advertising materials mentioning features or use of this
	22	* software must display the following acknowledgment:
	23	* "This product includes software developed by the OpenSSL Project
	24	* for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
	25	*
	26	* 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
	27	* endorse or promote products derived from this software without
	28	* prior written permission. For written permission, please contact
	29	* licensing@OpenSSL.org.
	30	*
	31	* 5. Products derived from this software may not be called "OpenSSL"
	32	* nor may "OpenSSL" appear in their names without prior written
	33	* permission of the OpenSSL Project.
	34	*
	35	* 6. Redistributions of any form whatsoever must retain the following
	36	* acknowledgment:
	37	* "This product includes software developed by the OpenSSL Project
	38	* for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
	39	*
	40	* THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
	41	* EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	42	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	43	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
	44	* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
	45	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	46	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
	47	* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	48	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
	49	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	50	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
	51	* OF THE POSSIBILITY OF SUCH DAMAGE.
	52	* ====================================================================
	53	*
	54	* This product includes cryptographic software written by Eric Young
	55	* (eay@cryptsoft.com). This product includes software written by Tim
	56	* Hudson (tjh@cryptsoft.com).
	57	*
	58	*/
	59
	60	#include "apps.h"
	61
5278dec3	62	#if defined(unix) \|\| defined(__APPLE__)
8f6f1441 TT	63	# include <unistd.h>
	64	# include <stdio.h>
	65	# include <limits.h>
	66	# include <errno.h>
	67	# include <string.h>
	68	# include <ctype.h>
	69	# include <sys/stat.h>
	70
	71	# include "internal/o_dir.h"
	72	# include <openssl/evp.h>
	73	# include <openssl/pem.h>
	74	# include <openssl/x509.h>
	75
	76
	77	# define MAX_COLLISIONS 256
	78
	79	typedef struct hentry_st {
	80	struct hentry_st *next;
	81	char *filename;
	82	unsigned short old_id;
	83	unsigned char need_symlink;
	84	unsigned char digest[EVP_MAX_MD_SIZE];
	85	} HENTRY;
	86
	87	typedef struct bucket_st {
	88	struct bucket_st *next;
	89	HENTRY first_entry, last_entry;
	90	unsigned int hash;
	91	unsigned short type;
	92	unsigned short num_needed;
	93	} BUCKET;
	94
	95	enum Type {
	96	/* Keep in sync with \|suffixes\|, below. */
	97	TYPE_CERT=0, TYPE_CRL=1
	98	};
	99
	100	enum Hash {
	101	HASH_OLD, HASH_NEW, HASH_BOTH
	102	};
	103
	104
	105	static int evpmdsize;
	106	static const EVP_MD *evpmd;
	107	static int remove_links = 1;
	108	static int verbose = 0;
	109	static BUCKET *hash_table[257];
	110
	111	static const char *suffixes[] = { "", "r" };
	112	static const char *extensions[] = { "pem", "crt", "cer", "crl" };
	113
	114
	115	static void bit_set(unsigned char *set, unsigned int bit)
	116	{
	117	set[bit >> 3] \|= 1 << (bit & 0x7);
	118	}
	119
	120	static int bit_isset(unsigned char *set, unsigned int bit)
	121	{
	122	return set[bit >> 3] & (1 << (bit & 0x7));
	123	}
	124
	125
ce249fac RS	126	/*
	127	* Process an entry; return number of errors.
	128	*/
	129	static int add_entry(enum Type type, unsigned int hash, const char *filename,
8f6f1441 TT	130	const unsigned char *digest, int need_symlink,
	131	unsigned short old_id)
	132	{
	133	static BUCKET nilbucket;
	134	static HENTRY nilhentry;
	135	BUCKET *bp;
	136	HENTRY ep, found = NULL;
	137	unsigned int ndx = (type + hash) % OSSL_NELEM(hash_table);
	138
	139	for (bp = hash_table[ndx]; bp; bp = bp->next)
	140	if (bp->type == type && bp->hash == hash)
	141	break;
	142	if (bp == NULL) {
	143	bp = app_malloc(sizeof(*bp), "hash bucket");
	144	*bp = nilbucket;
	145	bp->next = hash_table[ndx];
	146	bp->type = type;
	147	bp->hash = hash;
	148	hash_table[ndx] = bp;
	149	}
	150
	151	for (ep = bp->first_entry; ep; ep = ep->next) {
	152	if (digest && memcmp(digest, ep->digest, evpmdsize) == 0) {
	153	BIO_printf(bio_err,
	154	"%s: skipping duplicate certificate in %s\n",
	155	opt_getprog(), filename);
ce249fac	156	return 1;
8f6f1441 TT	157	}
	158	if (strcmp(filename, ep->filename) == 0) {
	159	found = ep;
	160	if (digest == NULL)
	161	break;
	162	}
	163	}
	164	ep = found;
	165	if (ep == NULL) {
ce249fac RS	166	if (bp->num_needed >= MAX_COLLISIONS) {
	167	BIO_printf(bio_err,
	168	"%s: hash table overflow for %s\n",
	169	opt_getprog(), filename);
	170	return 1;
	171	}
8f6f1441 TT	172	ep = app_malloc(sizeof(*ep), "collision bucket");
	173	*ep = nilhentry;
	174	ep->old_id = ~0;
	175	ep->filename = BUF_strdup(filename);
	176	if (bp->last_entry)
	177	bp->last_entry->next = ep;
	178	if (bp->first_entry == NULL)
	179	bp->first_entry = ep;
	180	bp->last_entry = ep;
	181	}
	182
	183	if (old_id < ep->old_id)
	184	ep->old_id = old_id;
	185	if (need_symlink && !ep->need_symlink) {
	186	ep->need_symlink = 1;
	187	bp->num_needed++;
	188	memcpy(ep->digest, digest, evpmdsize);
	189	}
ce249fac	190	return 0;
8f6f1441 TT	191	}
8f6f1441 TT	192
ce249fac RS	193	/*
	194	* Check if a symlink goes to the right spot; return 0 if okay.
	195	* This can be -1 if bad filename, or an error count.
	196	*/
8f6f1441 TT	197	static int handle_symlink(const char filename, const char fullpath)
	198	{
	199	unsigned int hash = 0;
	200	int i, type, id;
	201	unsigned char ch;
	202	char linktarget[NAME_MAX], *endptr;
	203	ssize_t n;
	204
	205	for (i = 0; i < 8; i++) {
	206	ch = filename[i];
	207	if (!isxdigit(ch))
	208	return -1;
	209	hash <<= 4;
	210	hash += app_hex(ch);
	211	}
	212	if (filename[i++] != '.')
	213	return -1;
	214	for (type = OSSL_NELEM(suffixes) - 1; type > 0; type--)
	215	if (strcasecmp(suffixes[type], &filename[i]) == 0)
	216	break;
	217	i += strlen(suffixes[type]);
	218
	219	id = strtoul(&filename[i], &endptr, 10);
	220	if (*endptr != '\0')
	221	return -1;
	222
	223	n = readlink(fullpath, linktarget, sizeof(linktarget));
	224	if (n < 0 \|\| n >= (int)sizeof(linktarget))
	225	return -1;
	226	linktarget[n] = 0;
	227
ce249fac	228	return add_entry(type, hash, linktarget, NULL, 0, id);
8f6f1441 TT	229	}
8f6f1441 TT	230
ce249fac RS	231	/*
	232	* process a file, return number of errors.
	233	*/
8f6f1441 TT	234	static int do_file(const char filename, const char fullpath, enum Hash h)
8f6f1441 TT	235	{
ce249fac	236	STACK_OF (X509_INFO) *inf = NULL;
8f6f1441 TT	237	X509_INFO *x;
	238	X509_NAME *name = NULL;
	239	BIO *b;
	240	const char *ext;
	241	unsigned char digest[EVP_MAX_MD_SIZE];
ce249fac	242	int i, type, errs = 0;
8f6f1441	243
ce249fac	244	/* Does it end with a recognized extension? */
8f6f1441	245	if ((ext = strrchr(filename, '.')) == NULL)
ce249fac	246	goto end;
8f6f1441 TT	247	for (i = 0; i < (int)OSSL_NELEM(extensions); i++) {
	248	if (strcasecmp(extensions[i], ext + 1) == 0)
	249	break;
	250	}
	251	if (i >= (int)OSSL_NELEM(extensions))
ce249fac	252	goto end;
8f6f1441	253
ce249fac RS	254	/* Does it have X.509 data in it? */
	255	if ((b = BIO_new_file(fullpath, "r")) == NULL) {
	256	BIO_printf(bio_err, "%s: skipping %s, cannot open file\n",
	257	opt_getprog(), filename);
	258	errs++;
	259	goto end;
	260	}
8f6f1441 TT	261	inf = PEM_X509_INFO_read_bio(b, NULL, NULL, NULL);
	262	BIO_free(b);
	263	if (inf == NULL)
ce249fac	264	goto end;
8f6f1441 TT	265
	266	if (sk_X509_INFO_num(inf) != 1) {
	267	BIO_printf(bio_err,
	268	"%s: skipping %s,"
	269	"it does not contain exactly one certificate or CRL\n",
	270	opt_getprog(), filename);
ce249fac	271	/* This is not an error. */
8f6f1441 TT	272	goto end;
	273	}
	274	x = sk_X509_INFO_value(inf, 0);
	275	if (x->x509) {
	276	type = TYPE_CERT;
	277	name = X509_get_subject_name(x->x509);
	278	X509_digest(x->x509, evpmd, digest, NULL);
	279	} else if (x->crl) {
	280	type = TYPE_CRL;
	281	name = X509_CRL_get_issuer(x->crl);
	282	X509_CRL_digest(x->crl, evpmd, digest, NULL);
	283	}
	284	if (name) {
	285	if ((h == HASH_NEW) \|\| (h == HASH_BOTH))
ce249fac	286	errs += add_entry(type, X509_NAME_hash(name), filename, digest, 1, ~0);
8f6f1441	287	if ((h == HASH_OLD) \|\| (h == HASH_BOTH))
ce249fac	288	errs += add_entry(type, X509_NAME_hash_old(name), filename, digest, 1, ~0);
8f6f1441 TT	289	}
	290
	291	end:
	292	sk_X509_INFO_pop_free(inf, X509_INFO_free);
ce249fac	293	return errs;
8f6f1441 TT	294	}
8f6f1441 TT	295
ce249fac RS	296	/*
	297	* Process a directory; return number of errors found.
	298	*/
8f6f1441 TT	299	static int do_dir(const char *dirname, enum Hash h)
	300	{
	301	BUCKET bp, nextbp;
	302	HENTRY ep, nextep;
	303	OPENSSL_DIR_CTX *d = NULL;
	304	struct stat st;
	305	unsigned char idmask[MAX_COLLISIONS / 8];
ce249fac	306	int i, n, nextid, buflen, errs = 0;
8f6f1441 TT	307	const char *pathsep;
	308	const char *filename;
	309	char *buf;
	310
	311	buflen = strlen(dirname);
	312	pathsep = (buflen && dirname[buflen - 1] == '/') ? "" : "/";
	313	buflen += NAME_MAX + 2;
	314	buf = app_malloc(buflen, "filename buffer");
	315
	316	if (verbose)
	317	BIO_printf(bio_out, "Doing %s\n", dirname);
	318
	319	while ((filename = OPENSSL_DIR_read(&d, dirname)) != NULL) {
	320	if (snprintf(buf, buflen, "%s%s%s",
	321	dirname, pathsep, filename) >= buflen)
	322	continue;
	323	if (lstat(buf, &st) < 0)
	324	continue;
	325	if (S_ISLNK(st.st_mode) && handle_symlink(filename, buf) == 0)
	326	continue;
ce249fac	327	errs += do_file(filename, buf, h);
8f6f1441 TT	328	}
	329	OPENSSL_DIR_end(&d);
	330
	331	for (i = 0; i < (int)OSSL_NELEM(hash_table); i++) {
	332	for (bp = hash_table[i]; bp; bp = nextbp) {
	333	nextbp = bp->next;
	334	nextid = 0;
	335	memset(idmask, 0, (bp->num_needed + 7) / 8);
	336	for (ep = bp->first_entry; ep; ep = ep->next)
	337	if (ep->old_id < bp->num_needed)
	338	bit_set(idmask, ep->old_id);
	339
	340	for (ep = bp->first_entry; ep; ep = nextep) {
	341	nextep = ep->next;
	342	if (ep->old_id < bp->num_needed) {
	343	/* Link exists, and is used as-is */
	344	snprintf(buf, buflen, "%08x.%s%d", bp->hash,
	345	suffixes[bp->type], ep->old_id);
	346	if (verbose)
	347	BIO_printf(bio_out, "link %s -> %s\n",
	348	ep->filename, buf);
	349	} else if (ep->need_symlink) {
	350	/* New link needed (it may replace something) */
	351	while (bit_isset(idmask, nextid))
	352	nextid++;
	353
	354	snprintf(buf, buflen, "%s%s%n%08x.%s%d",
	355	dirname, pathsep, &n, bp->hash,
	356	suffixes[bp->type], nextid);
	357	if (verbose)
	358	BIO_printf(bio_out, "link %s -> %s\n",
	359	ep->filename, &buf[n]);
ce249fac	360	if (unlink(buf) < 0 && errno != ENOENT) {
8f6f1441 TT	361	BIO_printf(bio_err,
	362	"%s: Can't unlink %s, %s\n",
	363	opt_getprog(), buf, strerror(errno));
ce249fac RS	364	errs++;
	365	}
	366	if (symlink(ep->filename, buf) < 0) {
8f6f1441 TT	367	BIO_printf(bio_err,
	368	"%s: Can't symlink %s, %s\n",
	369	opt_getprog(), ep->filename,
	370	strerror(errno));
ce249fac RS	371	errs++;
ce249fac RS	372	}
8f6f1441 TT	373	} else if (remove_links) {
	374	/* Link to be deleted */
	375	snprintf(buf, buflen, "%s%s%n%08x.%s%d",
	376	dirname, pathsep, &n, bp->hash,
	377	suffixes[bp->type], ep->old_id);
	378	if (verbose)
	379	BIO_printf(bio_out, "unlink %s\n",
	380	&buf[n]);
ce249fac	381	if (unlink(buf) < 0 && errno != ENOENT) {
8f6f1441 TT	382	BIO_printf(bio_err,
	383	"%s: Can't unlink %s, %s\n",
	384	opt_getprog(), buf, strerror(errno));
ce249fac RS	385	errs++;
ce249fac RS	386	}
8f6f1441 TT	387	}
	388	OPENSSL_free(ep->filename);
	389	OPENSSL_free(ep);
	390	}
	391	OPENSSL_free(bp);
	392	}
	393	hash_table[i] = NULL;
	394	}
8f6f1441 TT	395
8f6f1441 TT	396	OPENSSL_free(buf);
ce249fac	397	return errs;
8f6f1441 TT	398	}
	399
	400	typedef enum OPTION_choice {
	401	OPT_ERR = -1, OPT_EOF = 0, OPT_HELP,
	402	OPT_COMPAT, OPT_OLD, OPT_N, OPT_VERBOSE
	403	} OPTION_CHOICE;
	404
	405	OPTIONS rehash_options[] = {
	406	{OPT_HELP_STR, 1, '-', "Usage: %s [options] [cert-directory...]\n"},
	407	{OPT_HELP_STR, 1, '-', "Valid options are:\n"},
	408	{"help", OPT_HELP, '-', "Display this summary"},
	409	{"compat", OPT_COMPAT, '-', "Create both new- and old-style hash links"},
	410	{"old", OPT_OLD, '-', "Use old-style hash to generate links"},
	411	{"n", OPT_N, '-', "Do not remove existing links"},
	412	{"v", OPT_VERBOSE, '-', "Verbose output"},
	413	{NULL}
	414	};
	415
	416
	417	int rehash_main(int argc, char **argv)
	418	{
	419	const char env, prog;
	420	char e, m;
ce249fac	421	int errs = 0;
8f6f1441 TT	422	OPTION_CHOICE o;
	423	enum Hash h = HASH_NEW;
	424
	425	prog = opt_init(argc, argv, rehash_options);
	426	while ((o = opt_next()) != OPT_EOF) {
	427	switch (o) {
	428	case OPT_EOF:
	429	case OPT_ERR:
	430	BIO_printf(bio_err, "%s: Use -help for summary.\n", prog);
	431	goto end;
	432	case OPT_HELP:
	433	opt_help(rehash_options);
	434	goto end;
	435	case OPT_COMPAT:
	436	h = HASH_BOTH;
	437	break;
	438	case OPT_OLD:
	439	h = HASH_OLD;
	440	break;
	441	case OPT_N:
	442	remove_links = 0;
	443	break;
	444	case OPT_VERBOSE:
	445	verbose = 1;
	446	break;
	447	}
	448	}
	449	argc = opt_num_rest();
	450	argv = opt_rest();
	451
	452	evpmd = EVP_sha1();
	453	evpmdsize = EVP_MD_size(evpmd);
	454
	455	if (*argv) {
	456	while (*argv)
ce249fac	457	errs += do_dir(*argv++, h);
8f6f1441 TT	458	} else if ((env = getenv("SSL_CERT_DIR")) != NULL) {
	459	m = BUF_strdup(env);
	460	for (e = strtok(m, ":"); e != NULL; e = strtok(NULL, ":"))
ce249fac	461	errs += do_dir(e, h);
8f6f1441 TT	462	OPENSSL_free(m);
8f6f1441 TT	463	} else {
ce249fac	464	errs += do_dir("/etc/ssl/certs", h);
8f6f1441 TT	465	}
	466
	467	end:
ce249fac	468	return errs;
8f6f1441 TT	469	}
	470
	471	#else
62fdf4ee RS	472	OPTIONS rehash_options[] = {
	473	{NULL}
	474	};
8f6f1441 TT	475
	476	int rehash_main(int argc, char **argv)
	477	{
9e0da060	478	BIO_printf(bio_err, "Not available; use c_rehash script\n");
8f6f1441 TT	479	return (1);
	480	}
	481
5278dec3	482	#endif /* defined(unix) \|\| defined(__APPLE__) */