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/*
* Copyright (C) 2014 Dragon Research Labs ("DRL")
* Portions copyright (C) 2006--2008 American Registry for Internet Numbers ("ARIN")
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notices and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND DRL AND ARIN DISCLAIM ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DRL OR
* ARIN BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA
* OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id$ */
/*
* Read a directory tree of DER certificates and CRLs and copy
* them into a PEM format directory with names in the hash format
* that OpenSSL's lookup routines expect.
*/
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include <dirent.h>
#include <limits.h>
#include <openssl/bio.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#include <openssl/err.h>
#ifndef FILENAME_MAX
#define FILENAME_MAX 1024
#endif
static int verbose = 1;
/*
* Error handling.
*/
#define _lose(_msg_, _file_) \
do { \
fprintf(stderr, "%s: %s\n", _msg_, _file_); \
} while (0)
#define lose(_msg_, _file_) \
do { \
_lose(_msg_, _file_); \
goto done; \
} while (0)
#define lose_errno(_msg_, _file_) \
do { \
_lose(_msg_, _file_); \
perror(NULL); \
goto done; \
} while (0)
#define lose_openssl(_msg_, _file_) \
do { \
_lose(_msg_, _file_); \
ERR_print_errors_fp(stderr); \
goto done; \
} while (0)
/*
* Check str for a trailing suffix.
*/
static int has_suffix(const char *str, const char *suffix)
{
size_t len_str, len_suffix;
assert(str != NULL && suffix != NULL);
len_str = strlen(str);
len_suffix = strlen(suffix);
return len_str >= len_suffix && !strcmp(str + len_str - len_suffix, suffix);
}
/*
* Handle one object.
*/
static void file_handler(const char *filename, const char *targetdir)
{
char path[FILENAME_MAX];
unsigned long hash;
const char *fmt;
X509_CRL *crl = NULL;
X509 *cer = NULL;
BIO *b = NULL;
int i, is_crl;
if (has_suffix(filename, ".cer"))
is_crl = 0;
else if (has_suffix(filename, ".crl"))
is_crl = 1;
else
return; /* Ignore if neither certificate nor CRL */
if (verbose)
printf("Reading %s\n", filename);
if (!(b = BIO_new_file(filename, "rb")))
lose_openssl("Couldn't open input file", filename);
if (is_crl
? !(crl = d2i_X509_CRL_bio(b, NULL))
: !(cer = d2i_X509_bio(b, NULL)))
lose_openssl("Couldn't read DER object", filename);
BIO_free(b);
b = NULL;
if (is_crl) {
hash = X509_NAME_hash(X509_CRL_get_issuer(crl));
fmt = "%s/%08lx.r%d";
} else {
hash = X509_subject_name_hash(cer);
fmt = "%s/%08lx.%d";
}
for (i = 0; i < INT_MAX; i++)
if (snprintf(path, sizeof(path), fmt, targetdir, hash, i) == sizeof(path))
lose("Path too long", filename);
else if (access(path, F_OK))
break;
if (i == INT_MAX)
lose("No pathname available", filename);
if (verbose)
printf("Writing %s\n", path);
if (!(b = BIO_new_file(path, "w")))
lose_openssl("Couldn't open output file", path);
if (is_crl
? !PEM_write_bio_X509_CRL(b, crl)
: !PEM_write_bio_X509(b, cer))
lose_openssl("Couldn't write PEM object", path);
done:
X509_free(cer);
X509_CRL_free(crl);
BIO_free(b);
}
/*
* Walk a directory tree
*/
static int handle_directory(const char *name, const char *targetdir)
{
char path[FILENAME_MAX];
struct dirent *d;
size_t len;
DIR *dir;
int ret = 0, need_slash;
assert(name);
len = strlen(name);
assert(len > 0 && len < sizeof(path));
need_slash = name[len - 1] != '/';
if ((dir = opendir(name)) == NULL)
lose_errno("Couldn't open directory", name);
while ((d = readdir(dir)) != NULL) {
if (!strcmp(d->d_name, ".") || !strcmp(d->d_name, ".."))
continue;
if (len + strlen(d->d_name) + need_slash >= sizeof(path))
lose("Constructed path name too long", d->d_name);
strcpy(path, name);
if (need_slash)
strcat(path, "/");
strcat(path, d->d_name);
switch (d->d_type) {
case DT_DIR:
if (!handle_directory(path, targetdir))
lose("Directory walk failed", path);
continue;
default:
file_handler(path, targetdir);
continue;
}
}
ret = 1;
done:
if (dir)
closedir(dir);
return ret;
}
static void usage (const char *jane, const int code)
{
fprintf(code ? stderr : stdout, "usage: %s input-directory output-directory\n", jane);
exit(code);
}
int main(int argc, char *argv[])
{
if (argc == 2 && (!strcmp(argv[1], "-h") || !strcmp(argv[1], "--help")))
usage(argv[0], 0);
if (argc != 3)
usage(argv[0], 1);
return !handle_directory(argv[1], argv[2]);
}
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