/*
* Portions Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* 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 http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*
* Portions Copyright (C) Network Associates, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC 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.
*/
#include <config.h>
#include <stdbool.h>
#include <isc/buffer.h>
#include <isc/hmacmd5.h>
#include <isc/hmacsha.h>
#include <isc/md5.h>
#include <isc/sha1.h>
#include <isc/mem.h>
#include <isc/safe.h>
#include <isc/string.h>
#include <isc/util.h>
#include <pk11/site.h>
#include <dst/result.h>
#include "dst_internal.h"
#ifdef HAVE_FIPS_MODE
#include "dst_openssl.h" /* FIPS_mode() prototype */
#endif
#include "dst_parse.h"
#ifndef PK11_MD5_DISABLE
static isc_result_t hmacmd5_fromdns(dst_key_t *key, isc_buffer_t *data);
struct dst_hmacmd5_key {
unsigned char key[ISC_MD5_BLOCK_LENGTH];
};
#endif
static isc_result_t
getkeybits(dst_key_t *key, struct dst_private_element *element) {
if (element->length != 2)
return (DST_R_INVALIDPRIVATEKEY);
key->key_bits = (element->data[0] << 8) + element->data[1];
return (ISC_R_SUCCESS);
}
#ifndef PK11_MD5_DISABLE
static isc_result_t
hmacmd5_createctx(dst_key_t *key, dst_context_t *dctx) {
isc_hmacmd5_t *hmacmd5ctx;
dst_hmacmd5_key_t *hkey = key->keydata.hmacmd5;
hmacmd5ctx = isc_mem_get(dctx->mctx, sizeof(isc_hmacmd5_t));
if (hmacmd5ctx == NULL)
return (ISC_R_NOMEMORY);
isc_hmacmd5_init(hmacmd5ctx, hkey->key, ISC_MD5_BLOCK_LENGTH);
dctx->ctxdata.hmacmd5ctx = hmacmd5ctx;
return (ISC_R_SUCCESS);
}
static void
hmacmd5_destroyctx(dst_context_t *dctx) {
isc_hmacmd5_t *hmacmd5ctx = dctx->ctxdata.hmacmd5ctx;
if (hmacmd5ctx != NULL) {
isc_hmacmd5_invalidate(hmacmd5ctx);
isc_mem_put(dctx->mctx, hmacmd5ctx, sizeof(isc_hmacmd5_t));
dctx->ctxdata.hmacmd5ctx = NULL;
}
}
static isc_result_t
hmacmd5_adddata(dst_context_t *dctx, const isc_region_t *data) {
isc_hmacmd5_t *hmacmd5ctx = dctx->ctxdata.hmacmd5ctx;
isc_hmacmd5_update(hmacmd5ctx, data->base, data->length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacmd5_sign(dst_context_t *dctx, isc_buffer_t *sig) {
isc_hmacmd5_t *hmacmd5ctx = dctx->ctxdata.hmacmd5ctx;
unsigned char *digest;
if (isc_buffer_availablelength(sig) < ISC_MD5_DIGESTLENGTH)
return (ISC_R_NOSPACE);
digest = isc_buffer_used(sig);
isc_hmacmd5_sign(hmacmd5ctx, digest);
isc_buffer_add(sig, ISC_MD5_DIGESTLENGTH);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacmd5_verify(dst_context_t *dctx, const isc_region_t *sig) {
isc_hmacmd5_t *hmacmd5ctx = dctx->ctxdata.hmacmd5ctx;
if (sig->length > ISC_MD5_DIGESTLENGTH)
return (DST_R_VERIFYFAILURE);
if (isc_hmacmd5_verify2(hmacmd5ctx, sig->base, sig->length))
return (ISC_R_SUCCESS);
else
return (DST_R_VERIFYFAILURE);
}
static bool
hmacmd5_compare(const dst_key_t *key1, const dst_key_t *key2) {
dst_hmacmd5_key_t *hkey1, *hkey2;
hkey1 = key1->keydata.hmacmd5;
hkey2 = key2->keydata.hmacmd5;
if (hkey1 == NULL && hkey2 == NULL)
return (true);
else if (hkey1 == NULL || hkey2 == NULL)
return (false);
if (isc_safe_memequal(hkey1->key, hkey2->key, ISC_MD5_BLOCK_LENGTH))
return (true);
else
return (false);
}
static isc_result_t
hmacmd5_generate(dst_key_t *key, int pseudorandom_ok, void (*callback)(int)) {
isc_buffer_t b;
isc_result_t ret;
unsigned int bytes;
unsigned char data[ISC_MD5_BLOCK_LENGTH];
UNUSED(callback);
bytes = (key->key_size + 7) / 8;
if (bytes > ISC_MD5_BLOCK_LENGTH) {
bytes = ISC_MD5_BLOCK_LENGTH;
key->key_size = ISC_MD5_BLOCK_LENGTH * 8;
}
memset(data, 0, ISC_MD5_BLOCK_LENGTH);
ret = dst__entropy_getdata(data, bytes, pseudorandom_ok);
if (ret != ISC_R_SUCCESS)
return (ret);
isc_buffer_init(&b, data, bytes);
isc_buffer_add(&b, bytes);
ret = hmacmd5_fromdns(key, &b);
isc_safe_memwipe(data, sizeof(data));
return (ret);
}
static bool
hmacmd5_isprivate(const dst_key_t *key) {
UNUSED(key);
return (true);
}
static void
hmacmd5_destroy(dst_key_t *key) {
dst_hmacmd5_key_t *hkey = key->keydata.hmacmd5;
isc_safe_memwipe(hkey, sizeof(*hkey));
isc_mem_put(key->mctx, hkey, sizeof(*hkey));
key->keydata.hmacmd5 = NULL;
}
static isc_result_t
hmacmd5_todns(const dst_key_t *key, isc_buffer_t *data) {
dst_hmacmd5_key_t *hkey;
unsigned int bytes;
REQUIRE(key->keydata.hmacmd5 != NULL);
hkey = key->keydata.hmacmd5;
bytes = (key->key_size + 7) / 8;
if (isc_buffer_availablelength(data) < bytes)
return (ISC_R_NOSPACE);
isc_buffer_putmem(data, hkey->key, bytes);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacmd5_fromdns(dst_key_t *key, isc_buffer_t *data) {
dst_hmacmd5_key_t *hkey;
int keylen;
isc_region_t r;
isc_md5_t md5ctx;
isc_buffer_remainingregion(data, &r);
if (r.length == 0)
return (ISC_R_SUCCESS);
hkey = isc_mem_get(key->mctx, sizeof(dst_hmacmd5_key_t));
if (hkey == NULL)
return (ISC_R_NOMEMORY);
memset(hkey->key, 0, sizeof(hkey->key));
if (r.length > ISC_MD5_BLOCK_LENGTH) {
isc_md5_init(&md5ctx);
isc_md5_update(&md5ctx, r.base, r.length);
isc_md5_final(&md5ctx, hkey->key);
keylen = ISC_MD5_DIGESTLENGTH;
} else {
memmove(hkey->key, r.base, r.length);
keylen = r.length;
}
key->key_size = keylen * 8;
key->keydata.hmacmd5 = hkey;
isc_buffer_forward(data, r.length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacmd5_tofile(const dst_key_t *key, const char *directory) {
int cnt = 0;
dst_hmacmd5_key_t *hkey;
dst_private_t priv;
int bytes = (key->key_size + 7) / 8;
unsigned char buf[2];
if (key->keydata.hmacmd5 == NULL)
return (DST_R_NULLKEY);
if (key->external)
return (DST_R_EXTERNALKEY);
hkey = key->keydata.hmacmd5;
priv.elements[cnt].tag = TAG_HMACMD5_KEY;
priv.elements[cnt].length = bytes;
priv.elements[cnt++].data = hkey->key;
buf[0] = (key->key_bits >> 8) & 0xffU;
buf[1] = key->key_bits & 0xffU;
priv.elements[cnt].tag = TAG_HMACMD5_BITS;
priv.elements[cnt].data = buf;
priv.elements[cnt++].length = 2;
priv.nelements = cnt;
return (dst__privstruct_writefile(key, &priv, directory));
}
static isc_result_t
hmacmd5_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
dst_private_t priv;
isc_result_t result, tresult;
isc_buffer_t b;
isc_mem_t *mctx = key->mctx;
unsigned int i;
UNUSED(pub);
/* read private key file */
result = dst__privstruct_parse(key, DST_ALG_HMACMD5, lexer, mctx,
&priv);
if (result != ISC_R_SUCCESS)
return (result);
if (key->external)
result = DST_R_EXTERNALKEY;
key->key_bits = 0;
for (i = 0; i < priv.nelements && result == ISC_R_SUCCESS; i++) {
switch (priv.elements[i].tag) {
case TAG_HMACMD5_KEY:
isc_buffer_init(&b, priv.elements[i].data,
priv.elements[i].length);
isc_buffer_add(&b, priv.elements[i].length);
tresult = hmacmd5_fromdns(key, &b);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
case TAG_HMACMD5_BITS:
tresult = getkeybits(key, &priv.elements[i]);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
default:
result = DST_R_INVALIDPRIVATEKEY;
break;
}
}
dst__privstruct_free(&priv, mctx);
isc_safe_memwipe(&priv, sizeof(priv));
return (result);
}
static dst_func_t hmacmd5_functions = {
hmacmd5_createctx,
NULL, /*%< createctx2 */
hmacmd5_destroyctx,
hmacmd5_adddata,
hmacmd5_sign,
hmacmd5_verify,
NULL, /*%< verify2 */
NULL, /*%< computesecret */
hmacmd5_compare,
NULL, /*%< paramcompare */
hmacmd5_generate,
hmacmd5_isprivate,
hmacmd5_destroy,
hmacmd5_todns,
hmacmd5_fromdns,
hmacmd5_tofile,
hmacmd5_parse,
NULL, /*%< cleanup */
NULL, /*%< fromlabel */
NULL, /*%< dump */
NULL, /*%< restore */
};
isc_result_t
dst__hmacmd5_init(dst_func_t **funcp) {
/* Intentionally skip initialization */
if (!isc_md5_available())
return (ISC_R_SUCCESS);
#if PK11_FLAVOR != PK11_UTIMACO_FLAVOR
/*
* Prevent use of incorrect crypto
*/
RUNTIME_CHECK(isc_md5_check(false));
RUNTIME_CHECK(isc_hmacmd5_check(0));
#endif
REQUIRE(funcp != NULL);
if (*funcp == NULL)
*funcp = &hmacmd5_functions;
return (ISC_R_SUCCESS);
}
#endif
static isc_result_t hmacsha1_fromdns(dst_key_t *key, isc_buffer_t *data);
struct dst_hmacsha1_key {
unsigned char key[ISC_SHA1_BLOCK_LENGTH];
};
static isc_result_t
hmacsha1_createctx(dst_key_t *key, dst_context_t *dctx) {
isc_hmacsha1_t *hmacsha1ctx;
dst_hmacsha1_key_t *hkey = key->keydata.hmacsha1;
hmacsha1ctx = isc_mem_get(dctx->mctx, sizeof(isc_hmacsha1_t));
if (hmacsha1ctx == NULL)
return (ISC_R_NOMEMORY);
isc_hmacsha1_init(hmacsha1ctx, hkey->key, ISC_SHA1_BLOCK_LENGTH);
dctx->ctxdata.hmacsha1ctx = hmacsha1ctx;
return (ISC_R_SUCCESS);
}
static void
hmacsha1_destroyctx(dst_context_t *dctx) {
isc_hmacsha1_t *hmacsha1ctx = dctx->ctxdata.hmacsha1ctx;
if (hmacsha1ctx != NULL) {
isc_hmacsha1_invalidate(hmacsha1ctx);
isc_mem_put(dctx->mctx, hmacsha1ctx, sizeof(isc_hmacsha1_t));
dctx->ctxdata.hmacsha1ctx = NULL;
}
}
static isc_result_t
hmacsha1_adddata(dst_context_t *dctx, const isc_region_t *data) {
isc_hmacsha1_t *hmacsha1ctx = dctx->ctxdata.hmacsha1ctx;
isc_hmacsha1_update(hmacsha1ctx, data->base, data->length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha1_sign(dst_context_t *dctx, isc_buffer_t *sig) {
isc_hmacsha1_t *hmacsha1ctx = dctx->ctxdata.hmacsha1ctx;
unsigned char *digest;
if (isc_buffer_availablelength(sig) < ISC_SHA1_DIGESTLENGTH)
return (ISC_R_NOSPACE);
digest = isc_buffer_used(sig);
isc_hmacsha1_sign(hmacsha1ctx, digest, ISC_SHA1_DIGESTLENGTH);
isc_buffer_add(sig, ISC_SHA1_DIGESTLENGTH);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha1_verify(dst_context_t *dctx, const isc_region_t *sig) {
isc_hmacsha1_t *hmacsha1ctx = dctx->ctxdata.hmacsha1ctx;
if (sig->length > ISC_SHA1_DIGESTLENGTH || sig->length == 0)
return (DST_R_VERIFYFAILURE);
if (isc_hmacsha1_verify(hmacsha1ctx, sig->base, sig->length))
return (ISC_R_SUCCESS);
else
return (DST_R_VERIFYFAILURE);
}
static bool
hmacsha1_compare(const dst_key_t *key1, const dst_key_t *key2) {
dst_hmacsha1_key_t *hkey1, *hkey2;
hkey1 = key1->keydata.hmacsha1;
hkey2 = key2->keydata.hmacsha1;
if (hkey1 == NULL && hkey2 == NULL)
return (true);
else if (hkey1 == NULL || hkey2 == NULL)
return (false);
if (isc_safe_memequal(hkey1->key, hkey2->key, ISC_SHA1_BLOCK_LENGTH))
return (true);
else
return (false);
}
static isc_result_t
hmacsha1_generate(dst_key_t *key, int pseudorandom_ok, void (*callback)(int)) {
isc_buffer_t b;
isc_result_t ret;
unsigned int bytes;
unsigned char data[ISC_SHA1_BLOCK_LENGTH];
UNUSED(callback);
bytes = (key->key_size + 7) / 8;
if (bytes > ISC_SHA1_BLOCK_LENGTH) {
bytes = ISC_SHA1_BLOCK_LENGTH;
key->key_size = ISC_SHA1_BLOCK_LENGTH * 8;
}
memset(data, 0, ISC_SHA1_BLOCK_LENGTH);
ret = dst__entropy_getdata(data, bytes, pseudorandom_ok);
if (ret != ISC_R_SUCCESS)
return (ret);
isc_buffer_init(&b, data, bytes);
isc_buffer_add(&b, bytes);
ret = hmacsha1_fromdns(key, &b);
isc_safe_memwipe(data, sizeof(data));
return (ret);
}
static bool
hmacsha1_isprivate(const dst_key_t *key) {
UNUSED(key);
return (true);
}
static void
hmacsha1_destroy(dst_key_t *key) {
dst_hmacsha1_key_t *hkey = key->keydata.hmacsha1;
isc_safe_memwipe(hkey, sizeof(*hkey));
isc_mem_put(key->mctx, hkey, sizeof(*hkey));
key->keydata.hmacsha1 = NULL;
}
static isc_result_t
hmacsha1_todns(const dst_key_t *key, isc_buffer_t *data) {
dst_hmacsha1_key_t *hkey;
unsigned int bytes;
REQUIRE(key->keydata.hmacsha1 != NULL);
hkey = key->keydata.hmacsha1;
bytes = (key->key_size + 7) / 8;
if (isc_buffer_availablelength(data) < bytes)
return (ISC_R_NOSPACE);
isc_buffer_putmem(data, hkey->key, bytes);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha1_fromdns(dst_key_t *key, isc_buffer_t *data) {
dst_hmacsha1_key_t *hkey;
int keylen;
isc_region_t r;
isc_sha1_t sha1ctx;
isc_buffer_remainingregion(data, &r);
if (r.length == 0)
return (ISC_R_SUCCESS);
hkey = isc_mem_get(key->mctx, sizeof(dst_hmacsha1_key_t));
if (hkey == NULL)
return (ISC_R_NOMEMORY);
memset(hkey->key, 0, sizeof(hkey->key));
if (r.length > ISC_SHA1_BLOCK_LENGTH) {
isc_sha1_init(&sha1ctx);
isc_sha1_update(&sha1ctx, r.base, r.length);
isc_sha1_final(&sha1ctx, hkey->key);
keylen = ISC_SHA1_DIGESTLENGTH;
} else {
memmove(hkey->key, r.base, r.length);
keylen = r.length;
}
key->key_size = keylen * 8;
key->keydata.hmacsha1 = hkey;
isc_buffer_forward(data, r.length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha1_tofile(const dst_key_t *key, const char *directory) {
int cnt = 0;
dst_hmacsha1_key_t *hkey;
dst_private_t priv;
int bytes = (key->key_size + 7) / 8;
unsigned char buf[2];
if (key->keydata.hmacsha1 == NULL)
return (DST_R_NULLKEY);
if (key->external)
return (DST_R_EXTERNALKEY);
hkey = key->keydata.hmacsha1;
priv.elements[cnt].tag = TAG_HMACSHA1_KEY;
priv.elements[cnt].length = bytes;
priv.elements[cnt++].data = hkey->key;
buf[0] = (key->key_bits >> 8) & 0xffU;
buf[1] = key->key_bits & 0xffU;
priv.elements[cnt].tag = TAG_HMACSHA1_BITS;
priv.elements[cnt].data = buf;
priv.elements[cnt++].length = 2;
priv.nelements = cnt;
return (dst__privstruct_writefile(key, &priv, directory));
}
static isc_result_t
hmacsha1_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
dst_private_t priv;
isc_result_t result, tresult;
isc_buffer_t b;
isc_mem_t *mctx = key->mctx;
unsigned int i;
UNUSED(pub);
/* read private key file */
result = dst__privstruct_parse(key, DST_ALG_HMACSHA1, lexer, mctx,
&priv);
if (result != ISC_R_SUCCESS)
return (result);
if (key->external)
result = DST_R_EXTERNALKEY;
key->key_bits = 0;
for (i = 0; i < priv.nelements && result == ISC_R_SUCCESS; i++) {
switch (priv.elements[i].tag) {
case TAG_HMACSHA1_KEY:
isc_buffer_init(&b, priv.elements[i].data,
priv.elements[i].length);
isc_buffer_add(&b, priv.elements[i].length);
tresult = hmacsha1_fromdns(key, &b);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
case TAG_HMACSHA1_BITS:
tresult = getkeybits(key, &priv.elements[i]);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
default:
result = DST_R_INVALIDPRIVATEKEY;
break;
}
}
dst__privstruct_free(&priv, mctx);
isc_safe_memwipe(&priv, sizeof(priv));
return (result);
}
static dst_func_t hmacsha1_functions = {
hmacsha1_createctx,
NULL, /*%< createctx2 */
hmacsha1_destroyctx,
hmacsha1_adddata,
hmacsha1_sign,
hmacsha1_verify,
NULL, /* verify2 */
NULL, /* computesecret */
hmacsha1_compare,
NULL, /* paramcompare */
hmacsha1_generate,
hmacsha1_isprivate,
hmacsha1_destroy,
hmacsha1_todns,
hmacsha1_fromdns,
hmacsha1_tofile,
hmacsha1_parse,
NULL, /* cleanup */
NULL, /* fromlabel */
NULL, /* dump */
NULL, /* restore */
};
isc_result_t
dst__hmacsha1_init(dst_func_t **funcp) {
#if PK11_FLAVOR != PK11_UTIMACO_FLAVOR
/*
* Prevent use of incorrect crypto
*/
RUNTIME_CHECK(isc_sha1_check(false));
RUNTIME_CHECK(isc_hmacsha1_check(0));
#endif
REQUIRE(funcp != NULL);
if (*funcp == NULL)
*funcp = &hmacsha1_functions;
return (ISC_R_SUCCESS);
}
static isc_result_t hmacsha224_fromdns(dst_key_t *key, isc_buffer_t *data);
struct dst_hmacsha224_key {
unsigned char key[ISC_SHA224_BLOCK_LENGTH];
};
static isc_result_t
hmacsha224_createctx(dst_key_t *key, dst_context_t *dctx) {
isc_hmacsha224_t *hmacsha224ctx;
dst_hmacsha224_key_t *hkey = key->keydata.hmacsha224;
hmacsha224ctx = isc_mem_get(dctx->mctx, sizeof(isc_hmacsha224_t));
if (hmacsha224ctx == NULL)
return (ISC_R_NOMEMORY);
isc_hmacsha224_init(hmacsha224ctx, hkey->key, ISC_SHA224_BLOCK_LENGTH);
dctx->ctxdata.hmacsha224ctx = hmacsha224ctx;
return (ISC_R_SUCCESS);
}
static void
hmacsha224_destroyctx(dst_context_t *dctx) {
isc_hmacsha224_t *hmacsha224ctx = dctx->ctxdata.hmacsha224ctx;
if (hmacsha224ctx != NULL) {
isc_hmacsha224_invalidate(hmacsha224ctx);
isc_mem_put(dctx->mctx, hmacsha224ctx, sizeof(isc_hmacsha224_t));
dctx->ctxdata.hmacsha224ctx = NULL;
}
}
static isc_result_t
hmacsha224_adddata(dst_context_t *dctx, const isc_region_t *data) {
isc_hmacsha224_t *hmacsha224ctx = dctx->ctxdata.hmacsha224ctx;
isc_hmacsha224_update(hmacsha224ctx, data->base, data->length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha224_sign(dst_context_t *dctx, isc_buffer_t *sig) {
isc_hmacsha224_t *hmacsha224ctx = dctx->ctxdata.hmacsha224ctx;
unsigned char *digest;
if (isc_buffer_availablelength(sig) < ISC_SHA224_DIGESTLENGTH)
return (ISC_R_NOSPACE);
digest = isc_buffer_used(sig);
isc_hmacsha224_sign(hmacsha224ctx, digest, ISC_SHA224_DIGESTLENGTH);
isc_buffer_add(sig, ISC_SHA224_DIGESTLENGTH);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha224_verify(dst_context_t *dctx, const isc_region_t *sig) {
isc_hmacsha224_t *hmacsha224ctx = dctx->ctxdata.hmacsha224ctx;
if (sig->length > ISC_SHA224_DIGESTLENGTH || sig->length == 0)
return (DST_R_VERIFYFAILURE);
if (isc_hmacsha224_verify(hmacsha224ctx, sig->base, sig->length))
return (ISC_R_SUCCESS);
else
return (DST_R_VERIFYFAILURE);
}
static bool
hmacsha224_compare(const dst_key_t *key1, const dst_key_t *key2) {
dst_hmacsha224_key_t *hkey1, *hkey2;
hkey1 = key1->keydata.hmacsha224;
hkey2 = key2->keydata.hmacsha224;
if (hkey1 == NULL && hkey2 == NULL)
return (true);
else if (hkey1 == NULL || hkey2 == NULL)
return (false);
if (isc_safe_memequal(hkey1->key, hkey2->key, ISC_SHA224_BLOCK_LENGTH))
return (true);
else
return (false);
}
static isc_result_t
hmacsha224_generate(dst_key_t *key, int pseudorandom_ok,
void (*callback)(int))
{
isc_buffer_t b;
isc_result_t ret;
unsigned int bytes;
unsigned char data[ISC_SHA224_BLOCK_LENGTH];
UNUSED(callback);
bytes = (key->key_size + 7) / 8;
if (bytes > ISC_SHA224_BLOCK_LENGTH) {
bytes = ISC_SHA224_BLOCK_LENGTH;
key->key_size = ISC_SHA224_BLOCK_LENGTH * 8;
}
memset(data, 0, ISC_SHA224_BLOCK_LENGTH);
ret = dst__entropy_getdata(data, bytes, pseudorandom_ok);
if (ret != ISC_R_SUCCESS)
return (ret);
isc_buffer_init(&b, data, bytes);
isc_buffer_add(&b, bytes);
ret = hmacsha224_fromdns(key, &b);
isc_safe_memwipe(data, sizeof(data));
return (ret);
}
static bool
hmacsha224_isprivate(const dst_key_t *key) {
UNUSED(key);
return (true);
}
static void
hmacsha224_destroy(dst_key_t *key) {
dst_hmacsha224_key_t *hkey = key->keydata.hmacsha224;
isc_safe_memwipe(hkey, sizeof(*hkey));
isc_mem_put(key->mctx, hkey, sizeof(*hkey));
key->keydata.hmacsha224 = NULL;
}
static isc_result_t
hmacsha224_todns(const dst_key_t *key, isc_buffer_t *data) {
dst_hmacsha224_key_t *hkey;
unsigned int bytes;
REQUIRE(key->keydata.hmacsha224 != NULL);
hkey = key->keydata.hmacsha224;
bytes = (key->key_size + 7) / 8;
if (isc_buffer_availablelength(data) < bytes)
return (ISC_R_NOSPACE);
isc_buffer_putmem(data, hkey->key, bytes);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha224_fromdns(dst_key_t *key, isc_buffer_t *data) {
dst_hmacsha224_key_t *hkey;
int keylen;
isc_region_t r;
isc_sha224_t sha224ctx;
isc_buffer_remainingregion(data, &r);
if (r.length == 0)
return (ISC_R_SUCCESS);
hkey = isc_mem_get(key->mctx, sizeof(dst_hmacsha224_key_t));
if (hkey == NULL)
return (ISC_R_NOMEMORY);
memset(hkey->key, 0, sizeof(hkey->key));
if (r.length > ISC_SHA224_BLOCK_LENGTH) {
isc_sha224_init(&sha224ctx);
isc_sha224_update(&sha224ctx, r.base, r.length);
isc_sha224_final(hkey->key, &sha224ctx);
keylen = ISC_SHA224_DIGESTLENGTH;
} else {
memmove(hkey->key, r.base, r.length);
keylen = r.length;
}
key->key_size = keylen * 8;
key->keydata.hmacsha224 = hkey;
isc_buffer_forward(data, r.length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha224_tofile(const dst_key_t *key, const char *directory) {
int cnt = 0;
dst_hmacsha224_key_t *hkey;
dst_private_t priv;
int bytes = (key->key_size + 7) / 8;
unsigned char buf[2];
if (key->keydata.hmacsha224 == NULL)
return (DST_R_NULLKEY);
if (key->external)
return (DST_R_EXTERNALKEY);
hkey = key->keydata.hmacsha224;
priv.elements[cnt].tag = TAG_HMACSHA224_KEY;
priv.elements[cnt].length = bytes;
priv.elements[cnt++].data = hkey->key;
buf[0] = (key->key_bits >> 8) & 0xffU;
buf[1] = key->key_bits & 0xffU;
priv.elements[cnt].tag = TAG_HMACSHA224_BITS;
priv.elements[cnt].data = buf;
priv.elements[cnt++].length = 2;
priv.nelements = cnt;
return (dst__privstruct_writefile(key, &priv, directory));
}
static isc_result_t
hmacsha224_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
dst_private_t priv;
isc_result_t result, tresult;
isc_buffer_t b;
isc_mem_t *mctx = key->mctx;
unsigned int i;
UNUSED(pub);
/* read private key file */
result = dst__privstruct_parse(key, DST_ALG_HMACSHA224, lexer, mctx,
&priv);
if (result != ISC_R_SUCCESS)
return (result);
if (key->external)
result = DST_R_EXTERNALKEY;
key->key_bits = 0;
for (i = 0; i < priv.nelements && result == ISC_R_SUCCESS; i++) {
switch (priv.elements[i].tag) {
case TAG_HMACSHA224_KEY:
isc_buffer_init(&b, priv.elements[i].data,
priv.elements[i].length);
isc_buffer_add(&b, priv.elements[i].length);
tresult = hmacsha224_fromdns(key, &b);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
case TAG_HMACSHA224_BITS:
tresult = getkeybits(key, &priv.elements[i]);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
default:
result = DST_R_INVALIDPRIVATEKEY;
break;
}
}
dst__privstruct_free(&priv, mctx);
isc_safe_memwipe(&priv, sizeof(priv));
return (result);
}
static dst_func_t hmacsha224_functions = {
hmacsha224_createctx,
NULL, /*%< createctx2 */
hmacsha224_destroyctx,
hmacsha224_adddata,
hmacsha224_sign,
hmacsha224_verify,
NULL, /* verify2 */
NULL, /* computesecret */
hmacsha224_compare,
NULL, /* paramcompare */
hmacsha224_generate,
hmacsha224_isprivate,
hmacsha224_destroy,
hmacsha224_todns,
hmacsha224_fromdns,
hmacsha224_tofile,
hmacsha224_parse,
NULL, /* cleanup */
NULL, /* fromlabel */
NULL, /* dump */
NULL, /* restore */
};
isc_result_t
dst__hmacsha224_init(dst_func_t **funcp) {
REQUIRE(funcp != NULL);
if (*funcp == NULL)
*funcp = &hmacsha224_functions;
return (ISC_R_SUCCESS);
}
static isc_result_t hmacsha256_fromdns(dst_key_t *key, isc_buffer_t *data);
struct dst_hmacsha256_key {
unsigned char key[ISC_SHA256_BLOCK_LENGTH];
};
static isc_result_t
hmacsha256_createctx(dst_key_t *key, dst_context_t *dctx) {
isc_hmacsha256_t *hmacsha256ctx;
dst_hmacsha256_key_t *hkey = key->keydata.hmacsha256;
hmacsha256ctx = isc_mem_get(dctx->mctx, sizeof(isc_hmacsha256_t));
if (hmacsha256ctx == NULL)
return (ISC_R_NOMEMORY);
isc_hmacsha256_init(hmacsha256ctx, hkey->key, ISC_SHA256_BLOCK_LENGTH);
dctx->ctxdata.hmacsha256ctx = hmacsha256ctx;
return (ISC_R_SUCCESS);
}
static void
hmacsha256_destroyctx(dst_context_t *dctx) {
isc_hmacsha256_t *hmacsha256ctx = dctx->ctxdata.hmacsha256ctx;
if (hmacsha256ctx != NULL) {
isc_hmacsha256_invalidate(hmacsha256ctx);
isc_mem_put(dctx->mctx, hmacsha256ctx, sizeof(isc_hmacsha256_t));
dctx->ctxdata.hmacsha256ctx = NULL;
}
}
static isc_result_t
hmacsha256_adddata(dst_context_t *dctx, const isc_region_t *data) {
isc_hmacsha256_t *hmacsha256ctx = dctx->ctxdata.hmacsha256ctx;
isc_hmacsha256_update(hmacsha256ctx, data->base, data->length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha256_sign(dst_context_t *dctx, isc_buffer_t *sig) {
isc_hmacsha256_t *hmacsha256ctx = dctx->ctxdata.hmacsha256ctx;
unsigned char *digest;
if (isc_buffer_availablelength(sig) < ISC_SHA256_DIGESTLENGTH)
return (ISC_R_NOSPACE);
digest = isc_buffer_used(sig);
isc_hmacsha256_sign(hmacsha256ctx, digest, ISC_SHA256_DIGESTLENGTH);
isc_buffer_add(sig, ISC_SHA256_DIGESTLENGTH);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha256_verify(dst_context_t *dctx, const isc_region_t *sig) {
isc_hmacsha256_t *hmacsha256ctx = dctx->ctxdata.hmacsha256ctx;
if (sig->length > ISC_SHA256_DIGESTLENGTH || sig->length == 0)
return (DST_R_VERIFYFAILURE);
if (isc_hmacsha256_verify(hmacsha256ctx, sig->base, sig->length))
return (ISC_R_SUCCESS);
else
return (DST_R_VERIFYFAILURE);
}
static bool
hmacsha256_compare(const dst_key_t *key1, const dst_key_t *key2) {
dst_hmacsha256_key_t *hkey1, *hkey2;
hkey1 = key1->keydata.hmacsha256;
hkey2 = key2->keydata.hmacsha256;
if (hkey1 == NULL && hkey2 == NULL)
return (true);
else if (hkey1 == NULL || hkey2 == NULL)
return (false);
if (isc_safe_memequal(hkey1->key, hkey2->key, ISC_SHA256_BLOCK_LENGTH))
return (true);
else
return (false);
}
static isc_result_t
hmacsha256_generate(dst_key_t *key, int pseudorandom_ok,
void (*callback)(int))
{
isc_buffer_t b;
isc_result_t ret;
unsigned int bytes;
unsigned char data[ISC_SHA256_BLOCK_LENGTH];
UNUSED(callback);
bytes = (key->key_size + 7) / 8;
if (bytes > ISC_SHA256_BLOCK_LENGTH) {
bytes = ISC_SHA256_BLOCK_LENGTH;
key->key_size = ISC_SHA256_BLOCK_LENGTH * 8;
}
memset(data, 0, ISC_SHA256_BLOCK_LENGTH);
ret = dst__entropy_getdata(data, bytes, pseudorandom_ok);
if (ret != ISC_R_SUCCESS)
return (ret);
isc_buffer_init(&b, data, bytes);
isc_buffer_add(&b, bytes);
ret = hmacsha256_fromdns(key, &b);
isc_safe_memwipe(data, sizeof(data));
return (ret);
}
static bool
hmacsha256_isprivate(const dst_key_t *key) {
UNUSED(key);
return (true);
}
static void
hmacsha256_destroy(dst_key_t *key) {
dst_hmacsha256_key_t *hkey = key->keydata.hmacsha256;
isc_safe_memwipe(hkey, sizeof(*hkey));
isc_mem_put(key->mctx, hkey, sizeof(*hkey));
key->keydata.hmacsha256 = NULL;
}
static isc_result_t
hmacsha256_todns(const dst_key_t *key, isc_buffer_t *data) {
dst_hmacsha256_key_t *hkey;
unsigned int bytes;
REQUIRE(key->keydata.hmacsha256 != NULL);
hkey = key->keydata.hmacsha256;
bytes = (key->key_size + 7) / 8;
if (isc_buffer_availablelength(data) < bytes)
return (ISC_R_NOSPACE);
isc_buffer_putmem(data, hkey->key, bytes);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha256_fromdns(dst_key_t *key, isc_buffer_t *data) {
dst_hmacsha256_key_t *hkey;
int keylen;
isc_region_t r;
isc_sha256_t sha256ctx;
isc_buffer_remainingregion(data, &r);
if (r.length == 0)
return (ISC_R_SUCCESS);
hkey = isc_mem_get(key->mctx, sizeof(dst_hmacsha256_key_t));
if (hkey == NULL)
return (ISC_R_NOMEMORY);
memset(hkey->key, 0, sizeof(hkey->key));
if (r.length > ISC_SHA256_BLOCK_LENGTH) {
isc_sha256_init(&sha256ctx);
isc_sha256_update(&sha256ctx, r.base, r.length);
isc_sha256_final(hkey->key, &sha256ctx);
keylen = ISC_SHA256_DIGESTLENGTH;
} else {
memmove(hkey->key, r.base, r.length);
keylen = r.length;
}
key->key_size = keylen * 8;
key->keydata.hmacsha256 = hkey;
isc_buffer_forward(data, r.length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha256_tofile(const dst_key_t *key, const char *directory) {
int cnt = 0;
dst_hmacsha256_key_t *hkey;
dst_private_t priv;
int bytes = (key->key_size + 7) / 8;
unsigned char buf[2];
if (key->keydata.hmacsha256 == NULL)
return (DST_R_NULLKEY);
if (key->external)
return (DST_R_EXTERNALKEY);
hkey = key->keydata.hmacsha256;
priv.elements[cnt].tag = TAG_HMACSHA256_KEY;
priv.elements[cnt].length = bytes;
priv.elements[cnt++].data = hkey->key;
buf[0] = (key->key_bits >> 8) & 0xffU;
buf[1] = key->key_bits & 0xffU;
priv.elements[cnt].tag = TAG_HMACSHA256_BITS;
priv.elements[cnt].data = buf;
priv.elements[cnt++].length = 2;
priv.nelements = cnt;
return (dst__privstruct_writefile(key, &priv, directory));
}
static isc_result_t
hmacsha256_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
dst_private_t priv;
isc_result_t result, tresult;
isc_buffer_t b;
isc_mem_t *mctx = key->mctx;
unsigned int i;
UNUSED(pub);
/* read private key file */
result = dst__privstruct_parse(key, DST_ALG_HMACSHA256, lexer, mctx,
&priv);
if (result != ISC_R_SUCCESS)
return (result);
if (key->external)
result = DST_R_EXTERNALKEY;
key->key_bits = 0;
for (i = 0; i < priv.nelements && result == ISC_R_SUCCESS; i++) {
switch (priv.elements[i].tag) {
case TAG_HMACSHA256_KEY:
isc_buffer_init(&b, priv.elements[i].data,
priv.elements[i].length);
isc_buffer_add(&b, priv.elements[i].length);
tresult = hmacsha256_fromdns(key, &b);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
case TAG_HMACSHA256_BITS:
tresult = getkeybits(key, &priv.elements[i]);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
default:
result = DST_R_INVALIDPRIVATEKEY;
break;
}
}
dst__privstruct_free(&priv, mctx);
isc_safe_memwipe(&priv, sizeof(priv));
return (result);
}
static dst_func_t hmacsha256_functions = {
hmacsha256_createctx,
NULL, /*%< createctx2 */
hmacsha256_destroyctx,
hmacsha256_adddata,
hmacsha256_sign,
hmacsha256_verify,
NULL, /* verify2 */
NULL, /* computesecret */
hmacsha256_compare,
NULL, /* paramcompare */
hmacsha256_generate,
hmacsha256_isprivate,
hmacsha256_destroy,
hmacsha256_todns,
hmacsha256_fromdns,
hmacsha256_tofile,
hmacsha256_parse,
NULL, /* cleanup */
NULL, /* fromlabel */
NULL, /* dump */
NULL, /* restore */
};
isc_result_t
dst__hmacsha256_init(dst_func_t **funcp) {
REQUIRE(funcp != NULL);
if (*funcp == NULL)
*funcp = &hmacsha256_functions;
return (ISC_R_SUCCESS);
}
static isc_result_t hmacsha384_fromdns(dst_key_t *key, isc_buffer_t *data);
struct dst_hmacsha384_key {
unsigned char key[ISC_SHA384_BLOCK_LENGTH];
};
static isc_result_t
hmacsha384_createctx(dst_key_t *key, dst_context_t *dctx) {
isc_hmacsha384_t *hmacsha384ctx;
dst_hmacsha384_key_t *hkey = key->keydata.hmacsha384;
hmacsha384ctx = isc_mem_get(dctx->mctx, sizeof(isc_hmacsha384_t));
if (hmacsha384ctx == NULL)
return (ISC_R_NOMEMORY);
isc_hmacsha384_init(hmacsha384ctx, hkey->key, ISC_SHA384_BLOCK_LENGTH);
dctx->ctxdata.hmacsha384ctx = hmacsha384ctx;
return (ISC_R_SUCCESS);
}
static void
hmacsha384_destroyctx(dst_context_t *dctx) {
isc_hmacsha384_t *hmacsha384ctx = dctx->ctxdata.hmacsha384ctx;
if (hmacsha384ctx != NULL) {
isc_hmacsha384_invalidate(hmacsha384ctx);
isc_mem_put(dctx->mctx, hmacsha384ctx, sizeof(isc_hmacsha384_t));
dctx->ctxdata.hmacsha384ctx = NULL;
}
}
static isc_result_t
hmacsha384_adddata(dst_context_t *dctx, const isc_region_t *data) {
isc_hmacsha384_t *hmacsha384ctx = dctx->ctxdata.hmacsha384ctx;
isc_hmacsha384_update(hmacsha384ctx, data->base, data->length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha384_sign(dst_context_t *dctx, isc_buffer_t *sig) {
isc_hmacsha384_t *hmacsha384ctx = dctx->ctxdata.hmacsha384ctx;
unsigned char *digest;
if (isc_buffer_availablelength(sig) < ISC_SHA384_DIGESTLENGTH)
return (ISC_R_NOSPACE);
digest = isc_buffer_used(sig);
isc_hmacsha384_sign(hmacsha384ctx, digest, ISC_SHA384_DIGESTLENGTH);
isc_buffer_add(sig, ISC_SHA384_DIGESTLENGTH);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha384_verify(dst_context_t *dctx, const isc_region_t *sig) {
isc_hmacsha384_t *hmacsha384ctx = dctx->ctxdata.hmacsha384ctx;
if (sig->length > ISC_SHA384_DIGESTLENGTH || sig->length == 0)
return (DST_R_VERIFYFAILURE);
if (isc_hmacsha384_verify(hmacsha384ctx, sig->base, sig->length))
return (ISC_R_SUCCESS);
else
return (DST_R_VERIFYFAILURE);
}
static bool
hmacsha384_compare(const dst_key_t *key1, const dst_key_t *key2) {
dst_hmacsha384_key_t *hkey1, *hkey2;
hkey1 = key1->keydata.hmacsha384;
hkey2 = key2->keydata.hmacsha384;
if (hkey1 == NULL && hkey2 == NULL)
return (true);
else if (hkey1 == NULL || hkey2 == NULL)
return (false);
if (isc_safe_memequal(hkey1->key, hkey2->key, ISC_SHA384_BLOCK_LENGTH))
return (true);
else
return (false);
}
static isc_result_t
hmacsha384_generate(dst_key_t *key, int pseudorandom_ok,
void (*callback)(int))
{
isc_buffer_t b;
isc_result_t ret;
unsigned int bytes;
unsigned char data[ISC_SHA384_BLOCK_LENGTH];
UNUSED(callback);
bytes = (key->key_size + 7) / 8;
if (bytes > ISC_SHA384_BLOCK_LENGTH) {
bytes = ISC_SHA384_BLOCK_LENGTH;
key->key_size = ISC_SHA384_BLOCK_LENGTH * 8;
}
memset(data, 0, ISC_SHA384_BLOCK_LENGTH);
ret = dst__entropy_getdata(data, bytes, pseudorandom_ok);
if (ret != ISC_R_SUCCESS)
return (ret);
isc_buffer_init(&b, data, bytes);
isc_buffer_add(&b, bytes);
ret = hmacsha384_fromdns(key, &b);
isc_safe_memwipe(data, sizeof(data));
return (ret);
}
static bool
hmacsha384_isprivate(const dst_key_t *key) {
UNUSED(key);
return (true);
}
static void
hmacsha384_destroy(dst_key_t *key) {
dst_hmacsha384_key_t *hkey = key->keydata.hmacsha384;
isc_safe_memwipe(hkey, sizeof(*hkey));
isc_mem_put(key->mctx, hkey, sizeof(*hkey));
key->keydata.hmacsha384 = NULL;
}
static isc_result_t
hmacsha384_todns(const dst_key_t *key, isc_buffer_t *data) {
dst_hmacsha384_key_t *hkey;
unsigned int bytes;
REQUIRE(key->keydata.hmacsha384 != NULL);
hkey = key->keydata.hmacsha384;
bytes = (key->key_size + 7) / 8;
if (isc_buffer_availablelength(data) < bytes)
return (ISC_R_NOSPACE);
isc_buffer_putmem(data, hkey->key, bytes);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha384_fromdns(dst_key_t *key, isc_buffer_t *data) {
dst_hmacsha384_key_t *hkey;
int keylen;
isc_region_t r;
isc_sha384_t sha384ctx;
isc_buffer_remainingregion(data, &r);
if (r.length == 0)
return (ISC_R_SUCCESS);
hkey = isc_mem_get(key->mctx, sizeof(dst_hmacsha384_key_t));
if (hkey == NULL)
return (ISC_R_NOMEMORY);
memset(hkey->key, 0, sizeof(hkey->key));
if (r.length > ISC_SHA384_BLOCK_LENGTH) {
isc_sha384_init(&sha384ctx);
isc_sha384_update(&sha384ctx, r.base, r.length);
isc_sha384_final(hkey->key, &sha384ctx);
keylen = ISC_SHA384_DIGESTLENGTH;
} else {
memmove(hkey->key, r.base, r.length);
keylen = r.length;
}
key->key_size = keylen * 8;
key->keydata.hmacsha384 = hkey;
isc_buffer_forward(data, r.length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha384_tofile(const dst_key_t *key, const char *directory) {
int cnt = 0;
dst_hmacsha384_key_t *hkey;
dst_private_t priv;
int bytes = (key->key_size + 7) / 8;
unsigned char buf[2];
if (key->keydata.hmacsha384 == NULL)
return (DST_R_NULLKEY);
if (key->external)
return (DST_R_EXTERNALKEY);
hkey = key->keydata.hmacsha384;
priv.elements[cnt].tag = TAG_HMACSHA384_KEY;
priv.elements[cnt].length = bytes;
priv.elements[cnt++].data = hkey->key;
buf[0] = (key->key_bits >> 8) & 0xffU;
buf[1] = key->key_bits & 0xffU;
priv.elements[cnt].tag = TAG_HMACSHA384_BITS;
priv.elements[cnt].data = buf;
priv.elements[cnt++].length = 2;
priv.nelements = cnt;
return (dst__privstruct_writefile(key, &priv, directory));
}
static isc_result_t
hmacsha384_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
dst_private_t priv;
isc_result_t result, tresult;
isc_buffer_t b;
isc_mem_t *mctx = key->mctx;
unsigned int i;
UNUSED(pub);
/* read private key file */
result = dst__privstruct_parse(key, DST_ALG_HMACSHA384, lexer, mctx,
&priv);
if (result != ISC_R_SUCCESS)
return (result);
if (key->external)
result = DST_R_EXTERNALKEY;
key->key_bits = 0;
for (i = 0; i < priv.nelements && result == ISC_R_SUCCESS; i++) {
switch (priv.elements[i].tag) {
case TAG_HMACSHA384_KEY:
isc_buffer_init(&b, priv.elements[i].data,
priv.elements[i].length);
isc_buffer_add(&b, priv.elements[i].length);
tresult = hmacsha384_fromdns(key, &b);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
case TAG_HMACSHA384_BITS:
tresult = getkeybits(key, &priv.elements[i]);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
default:
result = DST_R_INVALIDPRIVATEKEY;
break;
}
}
dst__privstruct_free(&priv, mctx);
isc_safe_memwipe(&priv, sizeof(priv));
return (result);
}
static dst_func_t hmacsha384_functions = {
hmacsha384_createctx,
NULL, /*%< createctx2 */
hmacsha384_destroyctx,
hmacsha384_adddata,
hmacsha384_sign,
hmacsha384_verify,
NULL, /* verify2 */
NULL, /* computesecret */
hmacsha384_compare,
NULL, /* paramcompare */
hmacsha384_generate,
hmacsha384_isprivate,
hmacsha384_destroy,
hmacsha384_todns,
hmacsha384_fromdns,
hmacsha384_tofile,
hmacsha384_parse,
NULL, /* cleanup */
NULL, /* fromlabel */
NULL, /* dump */
NULL, /* restore */
};
isc_result_t
dst__hmacsha384_init(dst_func_t **funcp) {
REQUIRE(funcp != NULL);
if (*funcp == NULL)
*funcp = &hmacsha384_functions;
return (ISC_R_SUCCESS);
}
static isc_result_t hmacsha512_fromdns(dst_key_t *key, isc_buffer_t *data);
struct dst_hmacsha512_key {
unsigned char key[ISC_SHA512_BLOCK_LENGTH];
};
static isc_result_t
hmacsha512_createctx(dst_key_t *key, dst_context_t *dctx) {
isc_hmacsha512_t *hmacsha512ctx;
dst_hmacsha512_key_t *hkey = key->keydata.hmacsha512;
hmacsha512ctx = isc_mem_get(dctx->mctx, sizeof(isc_hmacsha512_t));
if (hmacsha512ctx == NULL)
return (ISC_R_NOMEMORY);
isc_hmacsha512_init(hmacsha512ctx, hkey->key, ISC_SHA512_BLOCK_LENGTH);
dctx->ctxdata.hmacsha512ctx = hmacsha512ctx;
return (ISC_R_SUCCESS);
}
static void
hmacsha512_destroyctx(dst_context_t *dctx) {
isc_hmacsha512_t *hmacsha512ctx = dctx->ctxdata.hmacsha512ctx;
if (hmacsha512ctx != NULL) {
isc_hmacsha512_invalidate(hmacsha512ctx);
isc_mem_put(dctx->mctx, hmacsha512ctx, sizeof(isc_hmacsha512_t));
dctx->ctxdata.hmacsha512ctx = NULL;
}
}
static isc_result_t
hmacsha512_adddata(dst_context_t *dctx, const isc_region_t *data) {
isc_hmacsha512_t *hmacsha512ctx = dctx->ctxdata.hmacsha512ctx;
isc_hmacsha512_update(hmacsha512ctx, data->base, data->length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha512_sign(dst_context_t *dctx, isc_buffer_t *sig) {
isc_hmacsha512_t *hmacsha512ctx = dctx->ctxdata.hmacsha512ctx;
unsigned char *digest;
if (isc_buffer_availablelength(sig) < ISC_SHA512_DIGESTLENGTH)
return (ISC_R_NOSPACE);
digest = isc_buffer_used(sig);
isc_hmacsha512_sign(hmacsha512ctx, digest, ISC_SHA512_DIGESTLENGTH);
isc_buffer_add(sig, ISC_SHA512_DIGESTLENGTH);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha512_verify(dst_context_t *dctx, const isc_region_t *sig) {
isc_hmacsha512_t *hmacsha512ctx = dctx->ctxdata.hmacsha512ctx;
if (sig->length > ISC_SHA512_DIGESTLENGTH || sig->length == 0)
return (DST_R_VERIFYFAILURE);
if (isc_hmacsha512_verify(hmacsha512ctx, sig->base, sig->length))
return (ISC_R_SUCCESS);
else
return (DST_R_VERIFYFAILURE);
}
static bool
hmacsha512_compare(const dst_key_t *key1, const dst_key_t *key2) {
dst_hmacsha512_key_t *hkey1, *hkey2;
hkey1 = key1->keydata.hmacsha512;
hkey2 = key2->keydata.hmacsha512;
if (hkey1 == NULL && hkey2 == NULL)
return (true);
else if (hkey1 == NULL || hkey2 == NULL)
return (false);
if (isc_safe_memequal(hkey1->key, hkey2->key, ISC_SHA512_BLOCK_LENGTH))
return (true);
else
return (false);
}
static isc_result_t
hmacsha512_generate(dst_key_t *key, int pseudorandom_ok,
void (*callback)(int))
{
isc_buffer_t b;
isc_result_t ret;
unsigned int bytes;
unsigned char data[ISC_SHA512_BLOCK_LENGTH];
UNUSED(callback);
bytes = (key->key_size + 7) / 8;
if (bytes > ISC_SHA512_BLOCK_LENGTH) {
bytes = ISC_SHA512_BLOCK_LENGTH;
key->key_size = ISC_SHA512_BLOCK_LENGTH * 8;
}
memset(data, 0, ISC_SHA512_BLOCK_LENGTH);
ret = dst__entropy_getdata(data, bytes, pseudorandom_ok);
if (ret != ISC_R_SUCCESS)
return (ret);
isc_buffer_init(&b, data, bytes);
isc_buffer_add(&b, bytes);
ret = hmacsha512_fromdns(key, &b);
isc_safe_memwipe(data, sizeof(data));
return (ret);
}
static bool
hmacsha512_isprivate(const dst_key_t *key) {
UNUSED(key);
return (true);
}
static void
hmacsha512_destroy(dst_key_t *key) {
dst_hmacsha512_key_t *hkey = key->keydata.hmacsha512;
isc_safe_memwipe(hkey, sizeof(*hkey));
isc_mem_put(key->mctx, hkey, sizeof(*hkey));
key->keydata.hmacsha512 = NULL;
}
static isc_result_t
hmacsha512_todns(const dst_key_t *key, isc_buffer_t *data) {
dst_hmacsha512_key_t *hkey;
unsigned int bytes;
REQUIRE(key->keydata.hmacsha512 != NULL);
hkey = key->keydata.hmacsha512;
bytes = (key->key_size + 7) / 8;
if (isc_buffer_availablelength(data) < bytes)
return (ISC_R_NOSPACE);
isc_buffer_putmem(data, hkey->key, bytes);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha512_fromdns(dst_key_t *key, isc_buffer_t *data) {
dst_hmacsha512_key_t *hkey;
int keylen;
isc_region_t r;
isc_sha512_t sha512ctx;
isc_buffer_remainingregion(data, &r);
if (r.length == 0)
return (ISC_R_SUCCESS);
hkey = isc_mem_get(key->mctx, sizeof(dst_hmacsha512_key_t));
if (hkey == NULL)
return (ISC_R_NOMEMORY);
memset(hkey->key, 0, sizeof(hkey->key));
if (r.length > ISC_SHA512_BLOCK_LENGTH) {
isc_sha512_init(&sha512ctx);
isc_sha512_update(&sha512ctx, r.base, r.length);
isc_sha512_final(hkey->key, &sha512ctx);
keylen = ISC_SHA512_DIGESTLENGTH;
} else {
memmove(hkey->key, r.base, r.length);
keylen = r.length;
}
key->key_size = keylen * 8;
key->keydata.hmacsha512 = hkey;
isc_buffer_forward(data, r.length);
return (ISC_R_SUCCESS);
}
static isc_result_t
hmacsha512_tofile(const dst_key_t *key, const char *directory) {
int cnt = 0;
dst_hmacsha512_key_t *hkey;
dst_private_t priv;
int bytes = (key->key_size + 7) / 8;
unsigned char buf[2];
if (key->keydata.hmacsha512 == NULL)
return (DST_R_NULLKEY);
if (key->external)
return (DST_R_EXTERNALKEY);
hkey = key->keydata.hmacsha512;
priv.elements[cnt].tag = TAG_HMACSHA512_KEY;
priv.elements[cnt].length = bytes;
priv.elements[cnt++].data = hkey->key;
buf[0] = (key->key_bits >> 8) & 0xffU;
buf[1] = key->key_bits & 0xffU;
priv.elements[cnt].tag = TAG_HMACSHA512_BITS;
priv.elements[cnt].data = buf;
priv.elements[cnt++].length = 2;
priv.nelements = cnt;
return (dst__privstruct_writefile(key, &priv, directory));
}
static isc_result_t
hmacsha512_parse(dst_key_t *key, isc_lex_t *lexer, dst_key_t *pub) {
dst_private_t priv;
isc_result_t result, tresult;
isc_buffer_t b;
isc_mem_t *mctx = key->mctx;
unsigned int i;
UNUSED(pub);
/* read private key file */
result = dst__privstruct_parse(key, DST_ALG_HMACSHA512, lexer, mctx,
&priv);
if (result != ISC_R_SUCCESS)
return (result);
if (key->external)
result = DST_R_EXTERNALKEY;
key->key_bits = 0;
for (i = 0; i < priv.nelements && result == ISC_R_SUCCESS; i++) {
switch (priv.elements[i].tag) {
case TAG_HMACSHA512_KEY:
isc_buffer_init(&b, priv.elements[i].data,
priv.elements[i].length);
isc_buffer_add(&b, priv.elements[i].length);
tresult = hmacsha512_fromdns(key, &b);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
case TAG_HMACSHA512_BITS:
tresult = getkeybits(key, &priv.elements[i]);
if (tresult != ISC_R_SUCCESS)
result = tresult;
break;
default:
result = DST_R_INVALIDPRIVATEKEY;
break;
}
}
dst__privstruct_free(&priv, mctx);
isc_safe_memwipe(&priv, sizeof(priv));
return (result);
}
static dst_func_t hmacsha512_functions = {
hmacsha512_createctx,
NULL, /*%< createctx2 */
hmacsha512_destroyctx,
hmacsha512_adddata,
hmacsha512_sign,
hmacsha512_verify,
NULL, /* verify2 */
NULL, /* computesecret */
hmacsha512_compare,
NULL, /* paramcompare */
hmacsha512_generate,
hmacsha512_isprivate,
hmacsha512_destroy,
hmacsha512_todns,
hmacsha512_fromdns,
hmacsha512_tofile,
hmacsha512_parse,
NULL, /* cleanup */
NULL, /* fromlabel */
NULL, /* dump */
NULL, /* restore */
};
isc_result_t
dst__hmacsha512_init(dst_func_t **funcp) {
REQUIRE(funcp != NULL);
if (*funcp == NULL)
*funcp = &hmacsha512_functions;
return (ISC_R_SUCCESS);
}
/*! \file */