123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205 |
- /*
- * Copyright 2019-2021 The OpenSSL Project Authors. All Rights Reserved.
- *
- * Licensed under the Apache License 2.0 (the "License"). You may not use
- * this file except in compliance with the License. You can obtain a copy
- * in the file LICENSE in the source distribution or at
- * https://www.openssl.org/source/license.html
- */
- /* Dispatch functions for chacha20 cipher */
- #include <openssl/proverr.h>
- #include "cipher_chacha20.h"
- #include "prov/implementations.h"
- #include "prov/providercommon.h"
- #define CHACHA20_KEYLEN (CHACHA_KEY_SIZE)
- #define CHACHA20_BLKLEN (1)
- #define CHACHA20_IVLEN (CHACHA_CTR_SIZE)
- #define CHACHA20_FLAGS (PROV_CIPHER_FLAG_CUSTOM_IV)
- static OSSL_FUNC_cipher_newctx_fn chacha20_newctx;
- static OSSL_FUNC_cipher_freectx_fn chacha20_freectx;
- static OSSL_FUNC_cipher_get_params_fn chacha20_get_params;
- static OSSL_FUNC_cipher_get_ctx_params_fn chacha20_get_ctx_params;
- static OSSL_FUNC_cipher_set_ctx_params_fn chacha20_set_ctx_params;
- static OSSL_FUNC_cipher_gettable_ctx_params_fn chacha20_gettable_ctx_params;
- static OSSL_FUNC_cipher_settable_ctx_params_fn chacha20_settable_ctx_params;
- #define chacha20_cipher ossl_cipher_generic_cipher
- #define chacha20_update ossl_cipher_generic_stream_update
- #define chacha20_final ossl_cipher_generic_stream_final
- #define chacha20_gettable_params ossl_cipher_generic_gettable_params
- void ossl_chacha20_initctx(PROV_CHACHA20_CTX *ctx)
- {
- ossl_cipher_generic_initkey(ctx, CHACHA20_KEYLEN * 8,
- CHACHA20_BLKLEN * 8,
- CHACHA20_IVLEN * 8,
- 0, CHACHA20_FLAGS,
- ossl_prov_cipher_hw_chacha20(CHACHA20_KEYLEN * 8),
- NULL);
- }
- static void *chacha20_newctx(void *provctx)
- {
- PROV_CHACHA20_CTX *ctx;
- if (!ossl_prov_is_running())
- return NULL;
- ctx = OPENSSL_zalloc(sizeof(*ctx));
- if (ctx != NULL)
- ossl_chacha20_initctx(ctx);
- return ctx;
- }
- static void chacha20_freectx(void *vctx)
- {
- PROV_CHACHA20_CTX *ctx = (PROV_CHACHA20_CTX *)vctx;
- if (ctx != NULL) {
- ossl_cipher_generic_reset_ctx((PROV_CIPHER_CTX *)vctx);
- OPENSSL_clear_free(ctx, sizeof(*ctx));
- }
- }
- static int chacha20_get_params(OSSL_PARAM params[])
- {
- return ossl_cipher_generic_get_params(params, 0, CHACHA20_FLAGS,
- CHACHA20_KEYLEN * 8,
- CHACHA20_BLKLEN * 8,
- CHACHA20_IVLEN * 8);
- }
- static int chacha20_get_ctx_params(void *vctx, OSSL_PARAM params[])
- {
- OSSL_PARAM *p;
- p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_IVLEN);
- if (p != NULL && !OSSL_PARAM_set_size_t(p, CHACHA20_IVLEN)) {
- ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
- return 0;
- }
- p = OSSL_PARAM_locate(params, OSSL_CIPHER_PARAM_KEYLEN);
- if (p != NULL && !OSSL_PARAM_set_size_t(p, CHACHA20_KEYLEN)) {
- ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_SET_PARAMETER);
- return 0;
- }
- return 1;
- }
- static const OSSL_PARAM chacha20_known_gettable_ctx_params[] = {
- OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
- OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
- OSSL_PARAM_END
- };
- const OSSL_PARAM *chacha20_gettable_ctx_params(ossl_unused void *cctx,
- ossl_unused void *provctx)
- {
- return chacha20_known_gettable_ctx_params;
- }
- static int chacha20_set_ctx_params(void *vctx, const OSSL_PARAM params[])
- {
- const OSSL_PARAM *p;
- size_t len;
- if (params == NULL)
- return 1;
- p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_KEYLEN);
- if (p != NULL) {
- if (!OSSL_PARAM_get_size_t(p, &len)) {
- ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
- return 0;
- }
- if (len != CHACHA20_KEYLEN) {
- ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_KEY_LENGTH);
- return 0;
- }
- }
- p = OSSL_PARAM_locate_const(params, OSSL_CIPHER_PARAM_IVLEN);
- if (p != NULL) {
- if (!OSSL_PARAM_get_size_t(p, &len)) {
- ERR_raise(ERR_LIB_PROV, PROV_R_FAILED_TO_GET_PARAMETER);
- return 0;
- }
- if (len != CHACHA20_IVLEN) {
- ERR_raise(ERR_LIB_PROV, PROV_R_INVALID_IV_LENGTH);
- return 0;
- }
- }
- return 1;
- }
- static const OSSL_PARAM chacha20_known_settable_ctx_params[] = {
- OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_KEYLEN, NULL),
- OSSL_PARAM_size_t(OSSL_CIPHER_PARAM_IVLEN, NULL),
- OSSL_PARAM_END
- };
- const OSSL_PARAM *chacha20_settable_ctx_params(ossl_unused void *cctx,
- ossl_unused void *provctx)
- {
- return chacha20_known_settable_ctx_params;
- }
- int ossl_chacha20_einit(void *vctx, const unsigned char *key, size_t keylen,
- const unsigned char *iv, size_t ivlen,
- const OSSL_PARAM params[])
- {
- int ret;
- /* The generic function checks for ossl_prov_is_running() */
- ret = ossl_cipher_generic_einit(vctx, key, keylen, iv, ivlen, NULL);
- if (ret && iv != NULL) {
- PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
- PROV_CIPHER_HW_CHACHA20 *hw = (PROV_CIPHER_HW_CHACHA20 *)ctx->hw;
- hw->initiv(ctx);
- }
- if (ret && !chacha20_set_ctx_params(vctx, params))
- ret = 0;
- return ret;
- }
- int ossl_chacha20_dinit(void *vctx, const unsigned char *key, size_t keylen,
- const unsigned char *iv, size_t ivlen,
- const OSSL_PARAM params[])
- {
- int ret;
- /* The generic function checks for ossl_prov_is_running() */
- ret = ossl_cipher_generic_dinit(vctx, key, keylen, iv, ivlen, NULL);
- if (ret && iv != NULL) {
- PROV_CIPHER_CTX *ctx = (PROV_CIPHER_CTX *)vctx;
- PROV_CIPHER_HW_CHACHA20 *hw = (PROV_CIPHER_HW_CHACHA20 *)ctx->hw;
- hw->initiv(ctx);
- }
- if (ret && !chacha20_set_ctx_params(vctx, params))
- ret = 0;
- return ret;
- }
- /* ossl_chacha20_functions */
- const OSSL_DISPATCH ossl_chacha20_functions[] = {
- { OSSL_FUNC_CIPHER_NEWCTX, (void (*)(void))chacha20_newctx },
- { OSSL_FUNC_CIPHER_FREECTX, (void (*)(void))chacha20_freectx },
- { OSSL_FUNC_CIPHER_ENCRYPT_INIT, (void (*)(void))ossl_chacha20_einit },
- { OSSL_FUNC_CIPHER_DECRYPT_INIT, (void (*)(void))ossl_chacha20_dinit },
- { OSSL_FUNC_CIPHER_UPDATE, (void (*)(void))chacha20_update },
- { OSSL_FUNC_CIPHER_FINAL, (void (*)(void))chacha20_final },
- { OSSL_FUNC_CIPHER_CIPHER, (void (*)(void))chacha20_cipher},
- { OSSL_FUNC_CIPHER_GET_PARAMS, (void (*)(void))chacha20_get_params },
- { OSSL_FUNC_CIPHER_GETTABLE_PARAMS,(void (*)(void))chacha20_gettable_params },
- { OSSL_FUNC_CIPHER_GET_CTX_PARAMS, (void (*)(void))chacha20_get_ctx_params },
- { OSSL_FUNC_CIPHER_GETTABLE_CTX_PARAMS,
- (void (*)(void))chacha20_gettable_ctx_params },
- { OSSL_FUNC_CIPHER_SET_CTX_PARAMS, (void (*)(void))chacha20_set_ctx_params },
- { OSSL_FUNC_CIPHER_SETTABLE_CTX_PARAMS,
- (void (*)(void))chacha20_settable_ctx_params },
- { 0, NULL }
- };
|