1 /* 2 * Copyright (c) 2017, Linaro Limited 3 * All rights reserved. 4 * 5 * SPDX-License-Identifier: BSD-2-Clause 6 */ 7 8 #ifndef __CRYPTO_INTERNAL_AES_GCM_H 9 #define __CRYPTO_INTERNAL_AES_GCM_H 10 11 #include <tee_api_types.h> 12 #include <tee_api_types.h> 13 #include <utee_defines.h> 14 #include <tomcrypt.h> 15 16 struct internal_aes_gcm_ctx { 17 uint64_t ctr[2]; 18 19 #ifdef CFG_AES_GCM_TABLE_BASED 20 uint64_t HL[16]; 21 uint64_t HH[16]; 22 #else 23 uint8_t hash_subkey[TEE_AES_BLOCK_SIZE]; 24 #endif 25 uint8_t hash_state[TEE_AES_BLOCK_SIZE]; 26 27 uint8_t buf_tag[TEE_AES_BLOCK_SIZE]; 28 uint8_t buf_hash[TEE_AES_BLOCK_SIZE]; 29 uint8_t buf_cryp[TEE_AES_BLOCK_SIZE]; 30 31 symmetric_key skey; 32 33 unsigned int tag_len; 34 unsigned int aad_bytes; 35 unsigned int payload_bytes; 36 unsigned int buf_pos; 37 }; 38 39 TEE_Result internal_aes_gcm_init(struct internal_aes_gcm_ctx *ctx, 40 TEE_OperationMode mode, const void *key, 41 size_t key_len, const void *nonce, 42 size_t nonce_len, size_t tag_len); 43 TEE_Result internal_aes_gcm_update_aad(struct internal_aes_gcm_ctx *ctx, 44 const void *data, size_t len); 45 TEE_Result internal_aes_gcm_update_payload(struct internal_aes_gcm_ctx *ctx, 46 TEE_OperationMode mode, 47 const void *src, size_t len, 48 void *dst); 49 TEE_Result internal_aes_gcm_enc_final(struct internal_aes_gcm_ctx *ctx, 50 const void *src, size_t len, void *dst, 51 void *tag, size_t *tag_len); 52 TEE_Result internal_aes_gcm_dec_final(struct internal_aes_gcm_ctx *ctx, 53 const void *src, size_t len, void *dst, 54 const void *tag, size_t tag_len); 55 56 void internal_aes_gcm_inc_ctr(struct internal_aes_gcm_ctx *ctx); 57 58 /* 59 * Internal weak functions that can be overridden with hardware specific 60 * implementations. 61 */ 62 void internal_aes_gcm_encrypt_block(struct internal_aes_gcm_ctx *ctx, 63 const void *src, void *dst); 64 65 TEE_Result internal_aes_gcm_set_key(struct internal_aes_gcm_ctx *ctx, 66 const void *key, size_t key_len); 67 68 void internal_aes_gcm_ghash_update(struct internal_aes_gcm_ctx *ctx, 69 const void *head, const void *data, 70 size_t num_blocks); 71 72 void 73 internal_aes_gcm_update_payload_block_aligned(struct internal_aes_gcm_ctx *ctx, 74 TEE_OperationMode mode, 75 const void *src, 76 size_t num_blocks, void *dst); 77 #endif /*__CRYPTO_INTERNAL_AES_GCM_H*/ 78