248 lines
7.2 KiB
C
248 lines
7.2 KiB
C
/*
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* Copyright 2022 The Tongsuo 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://github.com/Tongsuo-Project/Tongsuo/blob/master/LICENSE.txt
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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/evp.h>
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#include <openssl/err.h>
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#include <openssl/proverr.h>
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#include <crypto/zuc.h>
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#include "crypto/eia3/eia3_local.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 eia3_new;
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static OSSL_FUNC_mac_dupctx_fn eia3_dup;
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static OSSL_FUNC_mac_freectx_fn eia3_free;
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static OSSL_FUNC_mac_gettable_params_fn eia3_gettable_params;
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static OSSL_FUNC_mac_get_params_fn eia3_get_params;
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static OSSL_FUNC_mac_get_ctx_params_fn eia3_get_ctx_params;
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static OSSL_FUNC_mac_settable_ctx_params_fn eia3_settable_ctx_params;
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static OSSL_FUNC_mac_set_ctx_params_fn eia3_set_ctx_params;
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static OSSL_FUNC_mac_init_fn eia3_init;
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static OSSL_FUNC_mac_update_fn eia3_update;
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static OSSL_FUNC_mac_final_fn eia3_final;
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struct eia3_data_st {
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void *provctx;
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int updated;
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unsigned char key[ZUC_KEY_SIZE];
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unsigned char iv[ZUC_CTR_SIZE];
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EIA3_CTX eia3;
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};
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static void *eia3_new(void *provctx)
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{
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struct eia3_data_st *ctx;
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if (!ossl_prov_is_running())
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return NULL;
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ctx = OPENSSL_zalloc(sizeof(*ctx));
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if (ctx != NULL)
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ctx->provctx = provctx;
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return ctx;
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}
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static void eia3_free(void *vmacctx)
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{
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OPENSSL_free(vmacctx);
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}
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static void *eia3_dup(void *vsrc)
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{
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struct eia3_data_st *src = vsrc;
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struct eia3_data_st *dst;
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if (!ossl_prov_is_running())
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return NULL;
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dst = OPENSSL_malloc(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 size_t eia3_size(void)
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{
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return EIA3_DIGEST_SIZE;
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}
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static int eia3_setkey(struct eia3_data_st *ctx,
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const unsigned char *key, size_t keylen)
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{
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if (keylen != EVP_ZUC_KEY_SIZE) {
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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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EIA3_Init(&ctx->eia3, key, ctx->iv);
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memcpy(&ctx->key, key, keylen);
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ctx->updated = 0;
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return 1;
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}
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static int eia3_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 eia3_data_st *ctx = vmacctx;
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/* initialize the context in MAC_ctrl function */
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if (!ossl_prov_is_running() || !eia3_set_ctx_params(ctx, params))
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return 0;
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if (key != NULL)
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return eia3_setkey(ctx, key, keylen);
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/* no reinitialization of context with the same key is allowed */
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return ctx->updated == 0;
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}
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static int eia3_update(void *vmacctx, const unsigned char *data,
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size_t datalen)
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{
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struct eia3_data_st *ctx = vmacctx;
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ctx->updated = 1;
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if (datalen == 0)
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return 1;
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/* eia3 has nothing to return in its update function */
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EIA3_Update(&ctx->eia3, data, datalen);
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return 1;
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}
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static int eia3_final(void *vmacctx, unsigned char *out, size_t *outl,
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size_t outsize)
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{
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struct eia3_data_st *ctx = vmacctx;
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if (!ossl_prov_is_running())
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return 0;
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ctx->updated = 1;
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EIA3_Final(&ctx->eia3, out);
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*outl = eia3_size();
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return 1;
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}
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static const OSSL_PARAM known_gettable_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_IV, NULL, 0),
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OSSL_PARAM_END
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};
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static const OSSL_PARAM *eia3_gettable_params(void *provctx)
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{
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return known_gettable_params;
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}
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static int eia3_get_params(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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return OSSL_PARAM_set_size_t(p, eia3_size());
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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_octet_string(OSSL_MAC_PARAM_KEY, NULL, 0),
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OSSL_PARAM_octet_string(OSSL_MAC_PARAM_IV, NULL, 0),
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OSSL_PARAM_END
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};
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static const OSSL_PARAM *eia3_settable_ctx_params(ossl_unused void *ctx,
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ossl_unused void *provctx)
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{
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return known_settable_ctx_params;
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}
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static int eia3_set_ctx_params(void *vmacctx, const OSSL_PARAM *params)
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{
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struct eia3_data_st *ctx = vmacctx;
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const OSSL_PARAM *p;
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if ((p = OSSL_PARAM_locate_const(params, OSSL_MAC_PARAM_KEY)) != NULL
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&& p->data_type == OSSL_PARAM_OCTET_STRING
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&& !eia3_setkey(ctx, 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_IV)) != NULL
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&& p->data_type == OSSL_PARAM_OCTET_STRING) {
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if (p->data_size != ZUC_CTR_SIZE) {
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ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
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return 0;
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}
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memcpy(&ctx->iv, p->data, p->data_size);
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EIA3_Init(&ctx->eia3, ctx->key, ctx->iv);
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ctx->updated = 0;
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}
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return 1;
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}
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static int eia3_get_ctx_params(void *vmacctx, OSSL_PARAM params[])
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{
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struct eia3_data_st *ctx = vmacctx;
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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, eia3_size()))
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return 0;
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if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_IV)) != NULL) {
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if (p->data_size < ZUC_CTR_SIZE) {
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ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
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return 0;
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}
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if (!OSSL_PARAM_set_octet_string(p, ctx->iv, ZUC_CTR_SIZE)
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&& !OSSL_PARAM_set_octet_ptr(p, &ctx->iv, ZUC_CTR_SIZE)) {
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ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
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return 0;
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}
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}
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if ((p = OSSL_PARAM_locate(params, OSSL_MAC_PARAM_KEY)) != NULL) {
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if (p->data_size < ZUC_KEY_SIZE) {
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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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if (!OSSL_PARAM_set_octet_string(p, ctx->key, ZUC_KEY_SIZE)
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&& !OSSL_PARAM_set_octet_ptr(p, &ctx->key, ZUC_KEY_SIZE)) {
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ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
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return 0;
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}
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}
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return 1;
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}
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const OSSL_DISPATCH ossl_eia3_functions[] = {
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{ OSSL_FUNC_MAC_NEWCTX, (void (*)(void))eia3_new },
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{ OSSL_FUNC_MAC_DUPCTX, (void (*)(void))eia3_dup },
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{ OSSL_FUNC_MAC_FREECTX, (void (*)(void))eia3_free },
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{ OSSL_FUNC_MAC_INIT, (void (*)(void))eia3_init },
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{ OSSL_FUNC_MAC_UPDATE, (void (*)(void))eia3_update },
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{ OSSL_FUNC_MAC_FINAL, (void (*)(void))eia3_final },
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{ OSSL_FUNC_MAC_GETTABLE_PARAMS, (void (*)(void))eia3_gettable_params },
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{ OSSL_FUNC_MAC_GET_PARAMS, (void (*)(void))eia3_get_params },
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{ OSSL_FUNC_MAC_GET_CTX_PARAMS, (void (*)(void))eia3_get_ctx_params },
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{ OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS,
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(void (*)(void))eia3_settable_ctx_params },
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{ OSSL_FUNC_MAC_SET_CTX_PARAMS, (void (*)(void))eia3_set_ctx_params },
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{ 0, NULL }
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};
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