117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/* gcm128.h */
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/*
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GCM_GCM128_H_
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#define GCM_GCM128_H_
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/* gcm128.c */
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/*
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This file is part of the AVR-Crypto-Lib.
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Copyright (C) 2006-2015 Daniel Otte (bg@nerilex.org)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <inttypes.h>
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#include <stdlib.h>
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#include <string.h>
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#include <memxor.h>
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#include <blockcipher_descriptor.h>
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#include <gcm128.h>
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#define GCM128_BLOCK_BYTES 16
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#define GCM128_BLOCK_BITS (GCM128_BLOCK_BYTES * 8)
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#define GCM128_COUNT_BYTES 4
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#define GCM128_COUNT_BITS (GCM128_COUNT_BYTES * 8)
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typedef struct {
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uint8_t tag[GCM128_BLOCK_BYTES];
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uint8_t key[GCM128_BLOCK_BYTES];
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} ghash128_ctx_t;
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typedef struct {
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ghash128_ctx_t ghash_ctx;
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bcgen_ctx_t cipher_ctx;
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uint8_t ctr[GCM128_BLOCK_BYTES];
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uint8_t j0[GCM128_COUNT_BYTES];
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uint32_t length_a;
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uint32_t length_c;
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} gcm128_ctx_t;
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int8_t gcm128_init(
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gcm128_ctx_t *ctx,
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const bcdesc_t *cipher,
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const void *key,
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uint16_t key_length_b,
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const void *iv,
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uint16_t iv_length_b);
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void gcm128_add_ad_block(
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gcm128_ctx_t *ctx,
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const void *block );
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void gcm128_add_ad_final_block(
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gcm128_ctx_t *ctx,
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const void *block,
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uint16_t length_b );
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void gcm128_encrypt_block(
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gcm128_ctx_t *ctx,
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void *dest,
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const void *src);
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void gcm128_encrypt_final_block(
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gcm128_ctx_t *ctx,
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void *dest,
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const void *src,
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uint16_t length_b);
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void gcm128_decrypt_block(
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gcm128_ctx_t *ctx,
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void *dest,
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const void *src);
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void gcm128_decrypt_final_block(
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gcm128_ctx_t *ctx,
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void *dest,
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const void *src,
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uint16_t length_b);
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void gcm128_finalize(
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gcm128_ctx_t *ctx,
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void *tag,
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uint16_t tag_length_b);
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#endif /* GCM_GCM128_H_ */
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