168 lines
3.4 KiB
C
168 lines
3.4 KiB
C
/*
|
|
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
|
|
*
|
|
* SPDX-License-Identifier: MPL-2.0
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
|
|
*
|
|
* See the COPYRIGHT file distributed with this work for additional
|
|
* information regarding copyright ownership.
|
|
*/
|
|
|
|
#include <openssl/err.h>
|
|
#include <openssl/evp.h>
|
|
#include <openssl/opensslv.h>
|
|
|
|
#include <isc/assertions.h>
|
|
#include <isc/hmac.h>
|
|
#include <isc/md.h>
|
|
#include <isc/safe.h>
|
|
#include <isc/string.h>
|
|
#include <isc/types.h>
|
|
#include <isc/util.h>
|
|
|
|
#include "openssl_shim.h"
|
|
|
|
isc_hmac_t *
|
|
isc_hmac_new(void) {
|
|
EVP_MD_CTX *hmac_st = EVP_MD_CTX_new();
|
|
RUNTIME_CHECK(hmac_st != NULL);
|
|
return (isc_hmac_t *)hmac_st;
|
|
}
|
|
|
|
void
|
|
isc_hmac_free(isc_hmac_t *hmac_st) {
|
|
if (hmac_st == NULL) {
|
|
return;
|
|
}
|
|
|
|
EVP_MD_CTX_free((EVP_MD_CTX *)hmac_st);
|
|
}
|
|
|
|
isc_result_t
|
|
isc_hmac_init(isc_hmac_t *hmac_st, const void *key, const size_t keylen,
|
|
const isc_md_type_t *md_type) {
|
|
EVP_PKEY *pkey;
|
|
|
|
REQUIRE(hmac_st != NULL);
|
|
REQUIRE(key != NULL);
|
|
REQUIRE(keylen <= INT_MAX);
|
|
|
|
if (md_type == NULL) {
|
|
return ISC_R_NOTIMPLEMENTED;
|
|
}
|
|
|
|
pkey = EVP_PKEY_new_raw_private_key(EVP_PKEY_HMAC, NULL, key, keylen);
|
|
if (pkey == NULL) {
|
|
ERR_clear_error();
|
|
return ISC_R_CRYPTOFAILURE;
|
|
}
|
|
|
|
if (EVP_DigestSignInit(hmac_st, NULL, md_type, NULL, pkey) != 1) {
|
|
EVP_PKEY_free(pkey);
|
|
ERR_clear_error();
|
|
return ISC_R_CRYPTOFAILURE;
|
|
}
|
|
|
|
EVP_PKEY_free(pkey);
|
|
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
isc_result_t
|
|
isc_hmac_reset(isc_hmac_t *hmac_st) {
|
|
REQUIRE(hmac_st != NULL);
|
|
|
|
if (EVP_MD_CTX_reset(hmac_st) != 1) {
|
|
ERR_clear_error();
|
|
return ISC_R_CRYPTOFAILURE;
|
|
}
|
|
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
isc_result_t
|
|
isc_hmac_update(isc_hmac_t *hmac_st, const unsigned char *buf,
|
|
const size_t len) {
|
|
REQUIRE(hmac_st != NULL);
|
|
|
|
if (buf == NULL || len == 0) {
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
if (EVP_DigestSignUpdate(hmac_st, buf, len) != 1) {
|
|
ERR_clear_error();
|
|
return ISC_R_CRYPTOFAILURE;
|
|
}
|
|
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
isc_result_t
|
|
isc_hmac_final(isc_hmac_t *hmac_st, unsigned char *digest,
|
|
unsigned int *digestlen) {
|
|
REQUIRE(hmac_st != NULL);
|
|
REQUIRE(digest != NULL);
|
|
REQUIRE(digestlen != NULL);
|
|
|
|
size_t len = *digestlen;
|
|
|
|
if (EVP_DigestSignFinal(hmac_st, digest, &len) != 1) {
|
|
ERR_clear_error();
|
|
return ISC_R_CRYPTOFAILURE;
|
|
}
|
|
|
|
*digestlen = (unsigned int)len;
|
|
|
|
return ISC_R_SUCCESS;
|
|
}
|
|
|
|
const isc_md_type_t *
|
|
isc_hmac_get_md_type(isc_hmac_t *hmac_st) {
|
|
REQUIRE(hmac_st != NULL);
|
|
|
|
return EVP_MD_CTX_get0_md(hmac_st);
|
|
}
|
|
|
|
size_t
|
|
isc_hmac_get_size(isc_hmac_t *hmac_st) {
|
|
REQUIRE(hmac_st != NULL);
|
|
|
|
return (size_t)EVP_MD_CTX_size(hmac_st);
|
|
}
|
|
|
|
int
|
|
isc_hmac_get_block_size(isc_hmac_t *hmac_st) {
|
|
REQUIRE(hmac_st != NULL);
|
|
|
|
return EVP_MD_CTX_block_size(hmac_st);
|
|
}
|
|
|
|
isc_result_t
|
|
isc_hmac(const isc_md_type_t *type, const void *key, const size_t keylen,
|
|
const unsigned char *buf, const size_t len, unsigned char *digest,
|
|
unsigned int *digestlen) {
|
|
isc_result_t res;
|
|
isc_hmac_t *hmac_st = isc_hmac_new();
|
|
|
|
res = isc_hmac_init(hmac_st, key, keylen, type);
|
|
if (res != ISC_R_SUCCESS) {
|
|
goto end;
|
|
}
|
|
|
|
res = isc_hmac_update(hmac_st, buf, len);
|
|
if (res != ISC_R_SUCCESS) {
|
|
goto end;
|
|
}
|
|
|
|
res = isc_hmac_final(hmac_st, digest, digestlen);
|
|
if (res != ISC_R_SUCCESS) {
|
|
goto end;
|
|
}
|
|
end:
|
|
isc_hmac_free(hmac_st);
|
|
|
|
return res;
|
|
}
|