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108 lines
3.3 KiB
C
108 lines
3.3 KiB
C
/* siv-gcm.h
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AES-GCM-SIV, RFC8452
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Copyright (C) 2022 Red Hat, Inc.
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This file is part of GNU Nettle.
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GNU Nettle is free software: you can redistribute it and/or
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modify it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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or both in parallel, as here.
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GNU Nettle is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see http://www.gnu.org/licenses/.
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*/
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#ifndef NETTLE_SIV_GCM_H_INCLUDED
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#define NETTLE_SIV_GCM_H_INCLUDED
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#include "nettle-types.h"
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#include "nettle-meta.h"
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#include "aes.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* Name mangling */
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#define siv_gcm_encrypt_message nettle_siv_gcm_encrypt_message
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#define siv_gcm_decrypt_message nettle_siv_gcm_decrypt_message
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#define siv_gcm_aes128_encrypt_message nettle_siv_gcm_aes128_encrypt_message
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#define siv_gcm_aes128_decrypt_message nettle_siv_gcm_aes128_decrypt_message
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#define siv_gcm_aes256_encrypt_message nettle_siv_gcm_aes256_encrypt_message
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#define siv_gcm_aes256_decrypt_message nettle_siv_gcm_aes256_decrypt_message
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/* For AES-GCM-SIV, the block size of the underlying cipher shall be 128 bits. */
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#define SIV_GCM_BLOCK_SIZE 16
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#define SIV_GCM_DIGEST_SIZE 16
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#define SIV_GCM_NONCE_SIZE 12
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/* Generic interface. NC must be a block cipher with 128-bit block
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size, and keysize that is a multiple of 64 bits, such as AES-128 or
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AES-256. */
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void
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siv_gcm_encrypt_message (const struct nettle_cipher *nc,
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const void *ctx,
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void *ctr_ctx,
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size_t nlength, const uint8_t *nonce,
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size_t alength, const uint8_t *adata,
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size_t clength, uint8_t *dst, const uint8_t *src);
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int
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siv_gcm_decrypt_message (const struct nettle_cipher *nc,
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const void *ctx,
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void *ctr_ctx,
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size_t nlength, const uint8_t *nonce,
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size_t alength, const uint8_t *adata,
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size_t mlength, uint8_t *dst, const uint8_t *src);
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/* AEAD_AES_128_GCM_SIV */
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void
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siv_gcm_aes128_encrypt_message (const struct aes128_ctx *ctx,
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size_t nlength, const uint8_t *nonce,
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size_t alength, const uint8_t *adata,
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size_t clength, uint8_t *dst, const uint8_t *src);
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int
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siv_gcm_aes128_decrypt_message (const struct aes128_ctx *ctx,
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size_t nlength, const uint8_t *nonce,
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size_t alength, const uint8_t *adata,
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size_t mlength, uint8_t *dst, const uint8_t *src);
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/* AEAD_AES_256_GCM_SIV */
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void
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siv_gcm_aes256_encrypt_message (const struct aes256_ctx *ctx,
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size_t nlength, const uint8_t *nonce,
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size_t alength, const uint8_t *adata,
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size_t clength, uint8_t *dst, const uint8_t *src);
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int
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siv_gcm_aes256_decrypt_message (const struct aes256_ctx *ctx,
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size_t nlength, const uint8_t *nonce,
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size_t alength, const uint8_t *adata,
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size_t mlength, uint8_t *dst, const uint8_t *src);
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#ifdef __cplusplus
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}
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#endif
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#endif /* NETTLE_SIV_H_INCLUDED */
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