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255 lines
7.9 KiB
C
255 lines
7.9 KiB
C
/*
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* Copyright 2018-2023 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/core_dispatch.h>
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#include <openssl/core_names.h>
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#include <openssl/params.h>
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#include <openssl/proverr.h>
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#include "prov/blake2.h"
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#include "internal/cryptlib.h"
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#include "prov/implementations.h"
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#include "prov/providercommon.h"
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/*
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* Forward declaration of everything implemented here. This is not strictly
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* necessary for the compiler, but provides an assurance that the signatures
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* of the functions in the dispatch table are correct.
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*/
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static OSSL_FUNC_mac_newctx_fn blake2_mac_new;
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static OSSL_FUNC_mac_dupctx_fn blake2_mac_dup;
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static OSSL_FUNC_mac_freectx_fn blake2_mac_free;
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static OSSL_FUNC_mac_gettable_ctx_params_fn blake2_gettable_ctx_params;
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static OSSL_FUNC_mac_get_ctx_params_fn blake2_get_ctx_params;
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static OSSL_FUNC_mac_settable_ctx_params_fn blake2_mac_settable_ctx_params;
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static OSSL_FUNC_mac_set_ctx_params_fn blake2_mac_set_ctx_params;
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static OSSL_FUNC_mac_init_fn blake2_mac_init;
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static OSSL_FUNC_mac_update_fn blake2_mac_update;
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static OSSL_FUNC_mac_final_fn blake2_mac_final;
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struct blake2_mac_data_st {
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BLAKE2_CTX ctx;
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BLAKE2_PARAM params;
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unsigned char key[BLAKE2_KEYBYTES];
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};
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static void *blake2_mac_new(void *unused_provctx)
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{
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struct blake2_mac_data_st *macctx;
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if (!ossl_prov_is_running())
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return NULL;
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macctx = OPENSSL_zalloc(sizeof(*macctx));
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if (macctx != NULL) {
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BLAKE2_PARAM_INIT(&macctx->params);
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/* ctx initialization is deferred to BLAKE2b_Init() */
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}
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return macctx;
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}
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static void *blake2_mac_dup(void *vsrc)
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{
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struct blake2_mac_data_st *dst;
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struct blake2_mac_data_st *src = vsrc;
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if (!ossl_prov_is_running())
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return NULL;
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dst = OPENSSL_zalloc(sizeof(*dst));
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if (dst == NULL)
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return NULL;
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*dst = *src;
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return dst;
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}
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static void blake2_mac_free(void *vmacctx)
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{
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struct blake2_mac_data_st *macctx = vmacctx;
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if (macctx != NULL) {
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OPENSSL_cleanse(macctx->key, sizeof(macctx->key));
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OPENSSL_free(macctx);
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}
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}
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static size_t blake2_mac_size(void *vmacctx)
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{
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struct blake2_mac_data_st *macctx = vmacctx;
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return macctx->params.digest_length;
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}
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static int blake2_setkey(struct blake2_mac_data_st *macctx,
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const unsigned char *key, size_t keylen)
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{
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if (keylen > BLAKE2_KEYBYTES || keylen == 0) {
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ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
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return 0;
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}
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memcpy(macctx->key, key, keylen);
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/* Pad with zeroes at the end if required */
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if (keylen < BLAKE2_KEYBYTES)
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memset(macctx->key + keylen, 0, BLAKE2_KEYBYTES - keylen);
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BLAKE2_PARAM_SET_KEY_LENGTH(&macctx->params, (uint8_t)keylen);
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return 1;
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}
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static int blake2_mac_init(void *vmacctx, const unsigned char *key,
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size_t keylen, const OSSL_PARAM params[])
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{
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struct blake2_mac_data_st *macctx = vmacctx;
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if (!ossl_prov_is_running() || !blake2_mac_set_ctx_params(macctx, params))
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return 0;
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if (key != NULL) {
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if (!blake2_setkey(macctx, key, keylen))
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return 0;
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} else if (macctx->params.key_length == 0) {
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/* Check key has been set */
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ERR_raise(ERR_LIB_PROV, PROV_R_NO_KEY_SET);
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return 0;
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}
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return BLAKE2_INIT_KEY(&macctx->ctx, &macctx->params, macctx->key);
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}
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static int blake2_mac_update(void *vmacctx,
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const unsigned char *data, size_t datalen)
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{
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struct blake2_mac_data_st *macctx = vmacctx;
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if (datalen == 0)
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return 1;
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return BLAKE2_UPDATE(&macctx->ctx, data, datalen);
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}
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static int blake2_mac_final(void *vmacctx,
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unsigned char *out, size_t *outl,
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size_t outsize)
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{
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struct blake2_mac_data_st *macctx = vmacctx;
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if (!ossl_prov_is_running())
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return 0;
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*outl = blake2_mac_size(macctx);
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return BLAKE2_FINAL(out, &macctx->ctx);
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}
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static const OSSL_PARAM known_gettable_ctx_params[] = {
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OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
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OSSL_PARAM_size_t(OSSL_MAC_PARAM_BLOCK_SIZE, NULL),
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OSSL_PARAM_END
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};
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static const OSSL_PARAM *blake2_gettable_ctx_params(ossl_unused void *ctx,
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ossl_unused void *provctx)
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{
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return known_gettable_ctx_params;
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}
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static int blake2_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
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{
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OSSL_PARAM *p;
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if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_SIZE)) != NULL
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&& !OSSL_PARAM_set_size_t(p, blake2_mac_size(vmacctx)))
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return 0;
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if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_BLOCK_SIZE)) != NULL
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&& !OSSL_PARAM_set_size_t(p, BLAKE2_BLOCKBYTES))
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return 0;
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return 1;
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}
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static const OSSL_PARAM known_settable_ctx_params[] = {
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OSSL_PARAM_size_t(OSSL_MAC_PARAM_SIZE, NULL),
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OSSL_PARAM_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
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OSSL_PARAM_octet_string(OSSL_MAC_PARAM_CUSTOM, NULL, 0),
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OSSL_PARAM_octet_string(OSSL_MAC_PARAM_SALT, NULL, 0),
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OSSL_PARAM_END
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};
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static const OSSL_PARAM *blake2_mac_settable_ctx_params(
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ossl_unused void *ctx, ossl_unused void *p_ctx)
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{
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return known_settable_ctx_params;
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}
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/*
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* ALL parameters should be set before init().
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*/
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static int blake2_mac_set_ctx_params(void *vmacctx, const OSSL_PARAM params[])
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{
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struct blake2_mac_data_st *macctx = vmacctx;
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const OSSL_PARAM *p;
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if (params == NULL)
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return 1;
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if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SIZE)) != NULL) {
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size_t size;
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if (!OSSL_PARAM_get_size_t(p, &size)
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|| size < 1
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|| size > BLAKE2_OUTBYTES) {
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ERR_raise(ERR_LIB_PROV, PROV_R_NOT_XOF_OR_INVALID_LENGTH);
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return 0;
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}
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BLAKE2_PARAM_SET_DIGEST_LENGTH(&macctx->params, (uint8_t)size);
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}
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if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL
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&& !blake2_setkey(macctx, p->data, p->data_size))
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return 0;
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if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_CUSTOM))
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!= NULL) {
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/*
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* The OSSL_PARAM API doesn't provide direct pointer use, so we
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* must handle the OSSL_PARAM structure ourselves here
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*/
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if (p->data_size > BLAKE2_PERSONALBYTES) {
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ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_CUSTOM_LENGTH);
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return 0;
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}
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BLAKE2_PARAM_SET_PERSONAL(&macctx->params, p->data, p->data_size);
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}
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if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_SALT)) != NULL) {
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/*
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* The OSSL_PARAM API doesn't provide direct pointer use, so we
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* must handle the OSSL_PARAM structure ourselves here as well
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*/
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if (p->data_size > BLAKE2_SALTBYTES) {
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ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_SALT_LENGTH);
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return 0;
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}
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BLAKE2_PARAM_SET_SALT(&macctx->params, p->data, p->data_size);
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}
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return 1;
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}
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const OSSL_DISPATCH BLAKE2_FUNCTIONS[] = {
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{ OSSL_FUNC_MAC_NEWCTX, (void (*)(void))blake2_mac_new },
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{ OSSL_FUNC_MAC_DUPCTX, (void (*)(void))blake2_mac_dup },
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{ OSSL_FUNC_MAC_FREECTX, (void (*)(void))blake2_mac_free },
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{ OSSL_FUNC_MAC_INIT, (void (*)(void))blake2_mac_init },
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{ OSSL_FUNC_MAC_UPDATE, (void (*)(void))blake2_mac_update },
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{ OSSL_FUNC_MAC_FINAL, (void (*)(void))blake2_mac_final },
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{ OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS,
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(void (*)(void))blake2_gettable_ctx_params },
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{ OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))blake2_get_ctx_params },
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{ OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
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(void (*)(void))blake2_mac_settable_ctx_params },
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{ OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))blake2_mac_set_ctx_params },
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OSSL_DISPATCH_END
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};
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