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https://github.com/espressif/esp-idf
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8977be856d
- Even if the config MBEDTLS_HARDWARE_AES is enabled, we now support fallback to software implementation of GCM operations when non-AES ciphers are used.
82 lines
3.0 KiB
C
82 lines
3.0 KiB
C
/*
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* SPDX-FileCopyrightText: 2023-2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#include_next "mbedtls/gcm.h"
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#include "sdkconfig.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#if defined(MBEDTLS_GCM_ALT) && defined(MBEDTLS_GCM_NON_AES_CIPHER_SOFT_FALLBACK)
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/**
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* When the MBEDTLS_GCM_NON_AES_CIPHER_SOFT_FALLBACK is defined, for non-AES GCM
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* operations we need to fallback to the software function definitions of the
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* mbedtls GCM layer.
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* Thus in this case we need declarations for the software funtions.
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* Please refer mbedtls/include/mbedtls/gcm.h for function documentations
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*/
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void mbedtls_gcm_init_soft(mbedtls_gcm_context_soft *ctx);
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int mbedtls_gcm_setkey_soft(mbedtls_gcm_context_soft *ctx,
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mbedtls_cipher_id_t cipher,
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const unsigned char *key,
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unsigned int keybits);
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int mbedtls_gcm_starts_soft(mbedtls_gcm_context_soft *ctx,
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int mode,
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const unsigned char *iv, size_t iv_len);
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int mbedtls_gcm_update_ad_soft(mbedtls_gcm_context_soft *ctx,
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const unsigned char *add, size_t add_len);
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int mbedtls_gcm_update_soft(mbedtls_gcm_context_soft *ctx,
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const unsigned char *input, size_t input_length,
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unsigned char *output, size_t output_size,
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size_t *output_length);
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int mbedtls_gcm_finish_soft(mbedtls_gcm_context_soft *ctx,
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unsigned char *output, size_t output_size,
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size_t *output_length,
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unsigned char *tag, size_t tag_len);
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int mbedtls_gcm_crypt_and_tag_soft(mbedtls_gcm_context_soft *ctx,
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int mode,
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size_t length,
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const unsigned char *iv,
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size_t iv_len,
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const unsigned char *add,
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size_t add_len,
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const unsigned char *input,
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unsigned char *output,
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size_t tag_len,
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unsigned char *tag);
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int mbedtls_gcm_auth_decrypt_soft(mbedtls_gcm_context_soft *ctx,
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size_t length,
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const unsigned char *iv,
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size_t iv_len,
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const unsigned char *add,
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size_t add_len,
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const unsigned char *tag,
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size_t tag_len,
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const unsigned char *input,
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unsigned char *output);
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void mbedtls_gcm_free_soft(mbedtls_gcm_context_soft *ctx);
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#endif /* MBEDTLS_GCM_ALT && MBEDTLS_GCM_NON_AES_CIPHER_SOFT_FALLBACK*/
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#ifdef __cplusplus
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}
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#endif
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