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143 lines
6.1 KiB
143 lines
6.1 KiB
/*******************************************************************************
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* Copyright (C) 2022 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the 'License');
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an 'AS IS' BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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*******************************************************************************/
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#ifndef SM4_CCM_H
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#define SM4_CCM_H
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#include <crypto_mb/sm4.h>
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#include <immintrin.h>
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#define MIN_CCM_IV_LENGTH 7
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#define MAX_CCM_IV_LENGTH 13
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#define MIN_CCM_TAG_LENGTH 4
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#define MAX_CCM_TAG_LENGTH 16
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#define MAX_CCM_AAD_LENGTH 65280 /* 2^16 - 2^8 */
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#define SM4_CCM_CONTEXT_BUFFER_SLOT_TYPE int64u
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#define SM4_CCM_CONTEXT_BUFFER_SLOT_SIZE_BYTES (sizeof(SM4_CCM_CONTEXT_BUFFER_SLOT_TYPE))
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#define SM4_CCM_CONTEXT_BUFFER_SIZE_BYTES ((SM4_LINES * SM4_BLOCK_SIZE) / SM4_CCM_CONTEXT_BUFFER_SLOT_SIZE_BYTES)
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/*
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// Enum to control call sequence
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//
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// Valid call sequence:
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//
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// 1) mbx_sm4_ccm_init_mb16
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// 2) mbx_sm4_ccm_update_aad_mb16 – optional
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// 3) mbx_sm4_ccm_encrypt_mb16/mbx_sm4_ccm_decrypt_mb16 – optional, can be called as many times as necessary
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// 4) mbx_sm4_ccm_get_tag_mb16
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//
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// Call sequence restrictions:
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//
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// * mbx_sm4_ccm_get_tag_mb16 can be called after mbx_sm4_ccm_init_mb16 has been called.
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// * functions at steps 2-3 can be called as many times as needed to process payload while this functions processes buffers
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// with full blocks (Blocks of 16 bytes size) or empty buffers and length of processed payload is not overflowed.
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// * if functions at steps 2-3 called to process a partial block, it can’t be called again.
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// * if mbx_sm4_ccm_encrypt_mb16 or mbx_sm4_ccm_decrypt_mb16 was called, mbx_sm4_ccm_update_aad_mb16 can’t be called.
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// * if mbx_sm4_ccm_encrypt_mb16 was called, mbx_sm4_ccm_decrypt_mb16 can’t be called.
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// * if mbx_sm4_ccm_decrypt_mb16 was called, mbx_sm4_ccm_encrypt_mb16 can’t be called.
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*/
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typedef enum { sm4_ccm_update_aad = 0xF0A1, sm4_ccm_start_encdec, sm4_ccm_enc, sm4_ccm_dec, sm4_ccm_get_tag } sm4_ccm_state;
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struct _sm4_ccm_context_mb16 {
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int64u msg_len[SM4_LINES]; /* Message length (in bytes) of all lines */
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int64u total_processed_len[SM4_LINES]; /* Total processed plaintext/ciphertext length (in bytes) of all lines */
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int tag_len[SM4_LINES]; /* Tag length (in bytes) of all lines */
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int iv_len[SM4_LINES]; /* Total IV length (in bytes) of all lines */
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__m128i ctr0[SM4_LINES]; /* CTR0 content */
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__m128i ctr[SM4_LINES]; /* CTR content */
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__m128i hash[SM4_LINES]; /* hash value accumulator for AAD and TXT processing */
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mbx_sm4_key_schedule key_sched; /* SM4 key schedule */
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sm4_ccm_state state; /* call sequence state */
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};
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typedef struct _sm4_ccm_context_mb16 SM4_CCM_CTX_mb16;
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/*
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* Initializes SM4-CCM context.
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*
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* @param[in] pa_key Array of key pointers
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* @param[in] pa_iv Array of IV pointers
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* @param[in] iv_len Array of IV lengths
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* @param[in] tag_len Array of authentication tag lengths
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* @param[in] msg_len Array of total message lengths
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* @param[in/out] p_context SM4-CCM context
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*
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* @return Bitmask of operation status
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*/
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EXTERN_C mbx_status16 mbx_sm4_ccm_init_mb16(const sm4_key *const pa_key[SM4_LINES],
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const int8u *const pa_iv[SM4_LINES],
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const int iv_len[SM4_LINES],
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const int tag_len[SM4_LINES],
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const int64u msg_len[SM4_LINES],
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SM4_CCM_CTX_mb16 *p_context);
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/*
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* Digests additional authenticated data (AAD) for 16 buffers
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*
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* @param[in] pa_aad Array of AAD pointers
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* @param[in] aad_len Array of AAD lengths
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* @param[in/out] p_context SM4-CCM context
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*
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* @return Bitmask of operation status
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*/
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EXTERN_C mbx_status16 mbx_sm4_ccm_update_aad_mb16(const int8u *const pa_aad[SM4_LINES],
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const int aad_len[SM4_LINES],
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SM4_CCM_CTX_mb16 *p_context);
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/*
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* Retrieves authentication tag for 16 buffers
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*
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* @param[out] pa_tag Array of authentication tag pointers
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* @param[in] tag_len Array of tag lengths
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* @param[in/out] p_context SM4-CCM context
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*
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* @return Bitmask of operation status
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*/
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EXTERN_C mbx_status16 mbx_sm4_ccm_get_tag_mb16(int8u *pa_tag[SM4_LINES],
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const int tag_len[SM4_LINES],
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SM4_CCM_CTX_mb16 *p_context);
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/*
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* Encrypts 16 buffers with SM4-CCM.
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*
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* @param[out] pa_out Array of ciphertext pointers
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* @param[in] pa_in Array of plaintext pointers
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* @param[in] in_len Array of plaintext lengths
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* @param[in/out] p_context SM4-CCM context
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*
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* @return Bitmask of operation status
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*/
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EXTERN_C mbx_status16 mbx_sm4_ccm_encrypt_mb16(int8u *pa_out[SM4_LINES],
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const int8u *const pa_in[SM4_LINES],
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const int in_len[SM4_LINES],
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SM4_CCM_CTX_mb16 *p_context);
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/*
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* Decrypts 16 buffers with SM4-CCM.
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*
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* @param[out] pa_out Array of plaintext pointers
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* @param[in] pa_in Array of ciphertext pointers
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* @param[in] in_len Array of ciphertext lengths
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* @param[in/out] p_context SM4-CCM context
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*
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* @return Bitmask of operation status
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*/
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EXTERN_C mbx_status16 mbx_sm4_ccm_decrypt_mb16(int8u *pa_out[SM4_LINES],
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const int8u *const pa_in[SM4_LINES],
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const int in_len[SM4_LINES],
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SM4_CCM_CTX_mb16 *p_context);
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#endif /* SM4_CCM_H */
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