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/*
* Copyright (c) 2011-2012 Baptiste Daroussin <bapt@FreeBSD.org>
* Copyright (c) 2011-2012 Julien Laffaye <jlaffaye@FreeBSD.org>
* 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
* in this position and unchanged.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS 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 AUTHOR(S) 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.
*/
#include <openssl/err.h>
#include <openssl/sha.h>
#include <openssl/rsa.h>
#include <openssl/ssl.h>
#include "pkg.h"
#include "private/event.h"
#include "private/pkg.h"
static RSA *
_load_rsa_private_key(char *rsa_key_path, pem_password_cb *password_cb)
{
FILE *fp;
RSA *rsa = NULL;
if ((fp = fopen(rsa_key_path, "r")) == 0)
return (NULL);
if ((rsa = RSA_new()) == NULL) {
fclose(fp);
return (NULL);
}
if ((rsa = PEM_read_RSAPrivateKey(fp, 0, password_cb, rsa_key_path)) == NULL) {
fclose(fp);
return (NULL);
}
fclose(fp);
return (rsa);
}
static RSA *
_load_rsa_public_key(const char *rsa_key_path)
{
FILE *fp;
RSA *rsa = NULL;
char errbuf[1024];
if ((fp = fopen(rsa_key_path, "rb")) == 0) {
pkg_emit_errno("fopen", rsa_key_path);
return (NULL);
}
if (!PEM_read_RSA_PUBKEY(fp, &rsa, NULL, NULL)) {
pkg_emit_error("error reading public key(%s): %s", rsa_key_path,
ERR_error_string(ERR_get_error(), errbuf));
fclose(fp);
return (NULL);
}
fclose(fp);
return (rsa);
}
int
rsa_verify(const char *path, const char *key, unsigned char *sig, unsigned int sig_len)
{
char sha256[SHA256_DIGEST_LENGTH *2 +1];
char errbuf[1024];
RSA *rsa = NULL;
sha256_file(path, sha256);
SSL_load_error_strings();
OpenSSL_add_all_algorithms();
OpenSSL_add_all_ciphers();
rsa = _load_rsa_public_key(key);
if (rsa == NULL)
return(EPKG_FATAL);
if (RSA_verify(NID_sha1, sha256, sizeof(sha256), sig, sig_len, rsa) == 0) {
pkg_emit_error("%s: %s", key,
ERR_error_string(ERR_get_error(), errbuf));
return (EPKG_FATAL);
}
RSA_free(rsa);
ERR_free_strings();
return (EPKG_OK);
}
int
rsa_sign(char *path, pem_password_cb *password_cb, char *rsa_key_path,
unsigned char **sigret, unsigned int *siglen)
{
char errbuf[1024];
int max_len = 0;
RSA *rsa = NULL;
char sha256[SHA256_DIGEST_LENGTH * 2 +1];
if (access(rsa_key_path, R_OK) == -1) {
pkg_emit_errno("access", rsa_key_path);
return EPKG_FATAL;
}
SSL_load_error_strings();
OpenSSL_add_all_algorithms();
OpenSSL_add_all_ciphers();
rsa = _load_rsa_private_key(rsa_key_path, password_cb);
if (rsa == NULL) {
pkg_emit_error("can't load key from %s", rsa_key_path);
return EPKG_FATAL;
}
max_len = RSA_size(rsa);
*sigret = calloc(1, max_len + 1);
sha256_file(path, sha256);
if (RSA_sign(NID_sha1, sha256, sizeof(sha256), *sigret, siglen, rsa) == 0) {
/* XXX pass back RSA errors correctly */
pkg_emit_error("%s: %s", rsa_key_path,
ERR_error_string(ERR_get_error(), errbuf));
return EPKG_FATAL;
}
RSA_free(rsa);
ERR_free_strings();
return (EPKG_OK);
}
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