diff options
Diffstat (limited to 'crypto/openssl/providers/implementations/ciphers/cipher_chacha20.c')
| -rw-r--r-- | crypto/openssl/providers/implementations/ciphers/cipher_chacha20.c | 226 |
1 files changed, 226 insertions, 0 deletions
diff --git a/crypto/openssl/providers/implementations/ciphers/cipher_chacha20.c b/crypto/openssl/providers/implementations/ciphers/cipher_chacha20.c new file mode 100644 index 000000000000..3d03e6b09266 --- /dev/null +++ b/crypto/openssl/providers/implementations/ciphers/cipher_chacha20.c @@ -0,0 +1,226 @@ +/* + * Copyright 2019-2023 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_dupctx_fn chacha20_dupctx; +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 void *chacha20_dupctx(void *vctx) +{ + PROV_CHACHA20_CTX *ctx = (PROV_CHACHA20_CTX *)vctx; + PROV_CHACHA20_CTX *dupctx = NULL; + + if (ctx != NULL) { + dupctx = OPENSSL_memdup(ctx, sizeof(*dupctx)); + if (dupctx != NULL && dupctx->base.tlsmac != NULL && dupctx->base.alloced) { + dupctx->base.tlsmac = OPENSSL_memdup(dupctx->base.tlsmac, + dupctx->base.tlsmacsize); + if (dupctx->base.tlsmac == NULL) { + OPENSSL_free(dupctx); + dupctx = NULL; + } + } + } + return dupctx; +} + +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 (ossl_param_is_empty(params)) + 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_DUPCTX, (void (*)(void))chacha20_dupctx }, + { 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 }, + OSSL_DISPATCH_END +}; + |