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- /*
- * Copyright 2014-2022 The GmSSL Project. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the License); you may
- * not use this file except in compliance with the License.
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- */
- #ifndef GMSSL_ZUC_H
- #define GMSSL_ZUC_H
- #include <stdlib.h>
- #include <stdint.h>
- #ifdef __cplusplus
- extern "C" {
- #endif
- /*
- ZUC Public API
- ZUC_KEY_SIZE
- ZUC_IV_SIZE
- ZUC_MAC_SIZE
- ZUC_CTX
- zuc_encrypt_init
- zuc_encrypt_update
- zuc_encrypt_finish
- zuc_decrypt_init
- zuc_decrypt_update
- zuc_decrypt_finish
- ZUC_MAC_CTX
- zuc_mac_init
- zuc_mac_update
- zuc_mac_finish
- zuc_eea_encrypt
- zuc_eia_generate_mac
- */
- # define ZUC_KEY_SIZE 16
- # define ZUC_IV_SIZE 16
- # define ZUC_MAC_SIZE 4
- typedef uint32_t ZUC_BIT;
- typedef uint32_t ZUC_UINT5;
- typedef uint8_t ZUC_UINT6;
- typedef uint32_t ZUC_UINT15;
- typedef uint32_t ZUC_UINT31;
- typedef uint32_t ZUC_UINT32;
- typedef struct {
- ZUC_UINT31 LFSR[16];
- ZUC_UINT32 R1;
- ZUC_UINT32 R2;
- } ZUC_STATE;
- void zuc_init(ZUC_STATE *state, const uint8_t key[ZUC_KEY_SIZE], const uint8_t iv[ZUC_IV_SIZE]);
- void zuc_generate_keystream(ZUC_STATE *state, size_t nwords, ZUC_UINT32 *words);
- ZUC_UINT32 zuc_generate_keyword(ZUC_STATE *state);
- void zuc_encrypt(ZUC_STATE *state, const uint8_t *in, size_t inlen, uint8_t *out);
- typedef struct ZUC_MAC_CTX_st {
- ZUC_UINT31 LFSR[16];
- ZUC_UINT32 R1;
- ZUC_UINT32 R2;
- ZUC_UINT32 T;
- ZUC_UINT32 K0;
- uint8_t buf[4];
- size_t buflen;
- } ZUC_MAC_CTX;
- void zuc_mac_init(ZUC_MAC_CTX *ctx, const uint8_t key[ZUC_KEY_SIZE], const uint8_t iv[ZUC_IV_SIZE]);
- void zuc_mac_update(ZUC_MAC_CTX *ctx, const uint8_t *data, size_t len);
- void zuc_mac_finish(ZUC_MAC_CTX *ctx, const uint8_t *data, size_t nbits, uint8_t mac[ZUC_MAC_SIZE]);
- #define ZUC_EEA_ENCRYPT_NWORDS(nbits) ((nbits + 31)/32)
- #define ZUC_EEA_ENCRYPT_NBYTES(nbits) (ZUC_EEA_ENCRYPT_NWORDS(nbits)*4)
- void zuc_eea_encrypt(const ZUC_UINT32 *in, ZUC_UINT32 *out, size_t nbits,
- const uint8_t key[ZUC_KEY_SIZE], ZUC_UINT32 count, ZUC_UINT5 bearer,
- ZUC_BIT direction);
- ZUC_UINT32 zuc_eia_generate_mac(const ZUC_UINT32 *data, size_t nbits,
- const uint8_t key[ZUC_KEY_SIZE], ZUC_UINT32 count, ZUC_UINT5 bearer,
- ZUC_BIT direction);
- # define ZUC256_KEY_SIZE 32
- # define ZUC256_IV_SIZE 23
- # define ZUC256_MAC32_SIZE 4
- # define ZUC256_MAC64_SIZE 8
- # define ZUC256_MAC128_SIZE 16
- # define ZUC256_MIN_MAC_SIZE ZUC256_MAC32_SIZE
- # define ZUC256_MAX_MAC_SIZE ZUC256_MAC128_SIZE
- typedef ZUC_STATE ZUC256_STATE;
- void zuc256_init(ZUC256_STATE *state, const uint8_t key[ZUC256_KEY_SIZE], const uint8_t iv[ZUC256_IV_SIZE]);
- #define zuc256_generate_keystream(state,nwords,words) zuc_generate_keystream(state,nwords,words)
- #define zuc256_generate_keyword(state) zuc_generate_keyword(state)
- typedef struct ZUC256_MAC_CTX_st {
- ZUC_UINT31 LFSR[16];
- ZUC_UINT32 R1;
- ZUC_UINT32 R2;
- ZUC_UINT32 T[4];
- ZUC_UINT32 K0[4];
- uint8_t buf[4];
- size_t buflen;
- int macbits;
- } ZUC256_MAC_CTX;
- void zuc256_mac_init(ZUC256_MAC_CTX *ctx, const uint8_t key[ZUC256_KEY_SIZE],
- const uint8_t iv[ZUC256_IV_SIZE], int macbits);
- void zuc256_mac_update(ZUC256_MAC_CTX *ctx, const uint8_t *data, size_t len);
- void zuc256_mac_finish(ZUC256_MAC_CTX *ctx, const uint8_t *data, size_t nbits, uint8_t mac[ZUC_MAC_SIZE]);
- // Public API
- typedef struct {
- ZUC_STATE zuc_state;
- uint8_t block[4];
- size_t block_nbytes;
- } ZUC_CTX;
- int zuc_encrypt_init(ZUC_CTX *ctx, const uint8_t key[ZUC_KEY_SIZE], const uint8_t iv[ZUC_IV_SIZE]);
- int zuc_encrypt_update(ZUC_CTX *ctx, const uint8_t *in, size_t inlen, uint8_t *out, size_t *outlen);
- int zuc_encrypt_finish(ZUC_CTX *ctx, uint8_t *out, size_t *outlen);
- #define zuc_decrypt_init(ctx,key,iv) zuc_encrypt_init(ctx,key,iv)
- #define zuc_decrypt_update(ctx,in,inlen,out,outlen) zuc_encrypt_update(ctx,in,inlen,out,outlen)
- #define zuc_decrypt_finish(ctx,out,outlen) zuc_encrypt_finish(ctx,out,outlen)
- #ifdef __cplusplus
- }
- #endif
- #endif
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