xref: /isa-l_crypto/include/aes_gcm.h (revision 38b5be90d4f7aec62a62fa7ff11792bad8662385)

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#include "types.h"

/**
 *  @file aes_gcm.h
 *  @brief AES GCM encryption/decryption function prototypes.
 *
 * At build time there is an option to use non-temporal loads and stores
 * selected by defining the compile time option NT_LDST. The use of this option
 * places the following restriction on the gcm encryption functions:
 *
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 *
 * - When using the streaming API, all partial input buffers must be a multiple
 *   of 64 bytes long except for the last input buffer.
 *
 * - In-place encryption/decryption is not recommended.
 *
 */

/*
; References:
;       This code was derived and highly optimized from the code described in paper:
;               Vinodh Gopal et. al. Optimized Galois-Counter-Mode Implementation on Intel
Architecture Processors. August, 2010
;
;       For the shift-based reductions used in this code, we used the method described in paper:
;               Shay Gueron, Michael E. Kounavis. Intel Carry-Less Multiplication Instruction and
its Usage for Computing the GCM Mode. January, 2010.
;
;
;
; Assumptions: Support for SSE4.1 or greater, AVX or AVX2
;
;
; iv:
;       0                   1                   2                   3
;       0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
;       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
;       |                             Salt  (From the SA)               |
;       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
;       |                     Initialization Vector                     |
;       |         (This is the sequence number from IPSec header)       |
;       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
;       |                              0x1                              |
;       +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
;
; TLen:
;       from the definition of the spec, TLen can only be 8, 12 or 16 bytes.
;
 */
#ifndef _AES_GCM_h
#define _AES_GCM_h

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Define enums from API v2.24, so applications that were using this version
 * will still be compiled successfully.
 * This list does not need to be extended for new definitions.
 */
#ifndef NO_COMPAT_ISAL_CRYPTO_API_2_24
/***** Previous hash constants and typedefs *****/
#define MAX_TAG_LEN ISAL_GCM_MAX_TAG_LEN

#define GCM_IV_LEN       (16)
#define GCM_IV_DATA_LEN  ISAL_GCM_IV_LEN
#define GCM_IV_END_MARK  { 0x00, 0x00, 0x00, 0x01 };
#define GCM_IV_END_START (12)

#define GCM_128_KEY_LEN ISAL_GCM_128_KEY_LEN
#define GCM_256_KEY_LEN ISAL_GCM_256_KEY_LEN

#define GCM_BLOCK_LEN   ISAL_GCM_BLOCK_LEN
#define GCM_ENC_KEY_LEN ISAL_GCM_ENC_KEY_LEN
#define GCM_KEY_SETS    ISAL_GCM_KEY_SETS

#define GCM_MAX_LEN ISAL_GCM_MAX_LEN

#define LONGEST_TESTED_AAD_LENGTH (2 * 1024)

#define gcm_key_data     isal_gcm_key_data
#define gcm_context_data isal_gcm_context_data
#endif /* !NO_COMPAT_ISAL_CRYPTO_API_2_24 */

/* Authenticated Tag Length in bytes. Valid values are 16 (most likely), 12 or 8. */
#define ISAL_GCM_MAX_TAG_LEN (16)
//
// IV data is limited to 12 bytes.
//
#define ISAL_GCM_IV_LEN (12)

// Key lengths of 128 and 256 supported
#define ISAL_GCM_128_KEY_LEN (16)
#define ISAL_GCM_256_KEY_LEN (32)

#define ISAL_GCM_BLOCK_LEN   16
#define ISAL_GCM_ENC_KEY_LEN 16
#define ISAL_GCM_KEY_SETS    (15) /*exp key + 14 exp round keys */

#define ISAL_GCM_MAX_LEN UINT64_C(((1ULL << 39) - 256) - 1)

/**
 * @brief holds intermediate key data needed to improve performance
 *
 * isal_gcm_key_data hold internal key information used by gcm128 and gcm256.
 */
#ifdef __WIN32
__declspec(align(16))
#endif /* WIN32 */
struct isal_gcm_key_data {
        uint8_t expanded_keys[ISAL_GCM_ENC_KEY_LEN * ISAL_GCM_KEY_SETS];
        uint8_t shifted_hkey_1[ISAL_GCM_ENC_KEY_LEN];   // store HashKey <<1 mod poly here
        uint8_t shifted_hkey_2[ISAL_GCM_ENC_KEY_LEN];   // store HashKey^2 <<1 mod poly here
        uint8_t shifted_hkey_3[ISAL_GCM_ENC_KEY_LEN];   // store HashKey^3 <<1 mod poly here
        uint8_t shifted_hkey_4[ISAL_GCM_ENC_KEY_LEN];   // store HashKey^4 <<1 mod poly here
        uint8_t shifted_hkey_5[ISAL_GCM_ENC_KEY_LEN];   // store HashKey^5 <<1 mod poly here
        uint8_t shifted_hkey_6[ISAL_GCM_ENC_KEY_LEN];   // store HashKey^6 <<1 mod poly here
        uint8_t shifted_hkey_7[ISAL_GCM_ENC_KEY_LEN];   // store HashKey^7 <<1 mod poly here
        uint8_t shifted_hkey_8[ISAL_GCM_ENC_KEY_LEN];   // store HashKey^8 <<1 mod poly here
        uint8_t shifted_hkey_1_k[ISAL_GCM_ENC_KEY_LEN]; // store XOR of High 64 bits
        uint8_t shifted_hkey_2_k[ISAL_GCM_ENC_KEY_LEN]; // and Low 64b of HashKey^n <<1 mod poly
        uint8_t shifted_hkey_3_k[ISAL_GCM_ENC_KEY_LEN]; // here (for Karatsuba purposes)
        uint8_t shifted_hkey_4_k[ISAL_GCM_ENC_KEY_LEN];
        uint8_t shifted_hkey_5_k[ISAL_GCM_ENC_KEY_LEN];
        uint8_t shifted_hkey_6_k[ISAL_GCM_ENC_KEY_LEN];
        uint8_t shifted_hkey_7_k[ISAL_GCM_ENC_KEY_LEN];
        uint8_t shifted_hkey_8_k[ISAL_GCM_ENC_KEY_LEN];
        uint8_t shifted_hkey_n_k[ISAL_GCM_ENC_KEY_LEN *
                                 (64 - 16)]; // Others vaes version needs 2x32
}
#if defined(__unix__) || (__MINGW32__)
__attribute__((aligned(16)));
#else
;
#endif

/**
 * @brief holds GCM operation context
 */
struct isal_gcm_context_data {
        // init, update and finalize context data
        uint8_t aad_hash[ISAL_GCM_BLOCK_LEN];
        uint64_t aad_length;
        uint64_t in_length;
        uint8_t partial_block_enc_key[ISAL_GCM_BLOCK_LEN];
        uint8_t orig_IV[ISAL_GCM_BLOCK_LEN];
        uint8_t current_counter[ISAL_GCM_BLOCK_LEN];
        uint64_t partial_block_length;
};

/* ------------------ New interface for separate expanded keys ------------ */

/**
 * @brief GCM-AES Encryption using 128 bit keys
 *
 * @deprecated Please use isal_aes_gcm_enc_128() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_enc_128() instead.")
void
aes_gcm_enc_128(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                struct isal_gcm_context_data *context_data, //!< GCM operation context data
                uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed
                uint8_t const *in, //!< Plaintext input
                uint64_t len,      //!< Length of data in Bytes for encryption
                uint8_t *iv,       //!< iv pointer to 12 byte IV structure.
                //!< Internally, library concates 0x00000001 value to it.
                uint8_t const *aad,   //!< Additional Authentication Data (AAD)
                uint64_t aad_len,     //!< Length of AAD
                uint8_t *auth_tag,    //!< Authenticated Tag output
                uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple of
                                      //!< 4 bytes).
                                      //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Encryption using 256 bit keys
 *
 * @deprecated Please use isal_aes_gcm_enc_256() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_enc_256() instead.")
void
aes_gcm_enc_256(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                struct isal_gcm_context_data *context_data, //!< GCM operation context data
                uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed
                uint8_t const *in, //!< Plaintext input
                uint64_t len,      //!< Length of data in Bytes for encryption
                uint8_t *iv,       //!< iv pointer to 12 byte IV structure.
                //!< Internally, library concates 0x00000001 value to it.
                uint8_t const *aad,   //!< Additional Authentication Data (AAD)
                uint64_t aad_len,     //!< Length of AAD
                uint8_t *auth_tag,    //!< Authenticated Tag output
                uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple of
                                      //!< 4 bytes).
                                      //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Decryption using 128 bit keys
 *
 * @deprecated Please use isal_aes_gcm_dec_128() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_dec_128() instead.")
void
aes_gcm_dec_128(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                struct isal_gcm_context_data *context_data, //!< GCM operation context data
                uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed
                uint8_t const *in, //!< Ciphertext input
                uint64_t len,      //!< Length of data in Bytes for decryption
                uint8_t *iv,       //!< iv pointer to 12 byte IV structure.
                //!< Internally, library concates 0x00000001 value to it.
                uint8_t const *aad,   //!< Additional Authentication Data (AAD)
                uint64_t aad_len,     //!< Length of AAD
                uint8_t *auth_tag,    //!< Authenticated Tag output
                uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple of
                                      //!< 4 bytes).
                                      //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Decryption using 128 bit keys
 *
 * @deprecated Please use isal_aes_gcm_dec_256() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_dec_256() instead.")
void
aes_gcm_dec_256(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                struct isal_gcm_context_data *context_data, //!< GCM operation context data
                uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed
                uint8_t const *in, //!< Ciphertext input
                uint64_t len,      //!< Length of data in Bytes for decryption
                uint8_t *iv,       //!< iv pointer to 12 byte IV structure.
                //!< Internally, library concates 0x00000001 value to it.
                uint8_t const *aad,   //!< Additional Authentication Data (AAD)
                uint64_t aad_len,     //!< Length of AAD
                uint8_t *auth_tag,    //!< Authenticated Tag output
                uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple of
                                      //!< 4 bytes).
                                      //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief Start a AES-GCM Encryption message 128 bit key
 *
 * @deprecated Please use isal_aes_gcm_init_128() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_init_128() instead.")
void
aes_gcm_init_128(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                 struct isal_gcm_context_data *context_data, //!< GCM operation context data
                 uint8_t *iv,                                //!< Pointer to 12 byte IV structure
                 //!< Internally, library concates 0x00000001 value to it
                 uint8_t const *aad, //!< Additional Authentication Data (AAD)
                 uint64_t aad_len    //!< Length of AAD
);

/**
 * @brief Start a AES-GCM Encryption message 256 bit key
 *
 * @deprecated Please use isal_aes_gcm_init_256() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_init_256() instead.")
void
aes_gcm_init_256(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                 struct isal_gcm_context_data *context_data, //!< GCM operation context data
                 uint8_t *iv,                                //!< Pointer to 12 byte IV structure
                 //!< Internally, library concates 0x00000001 value to it
                 uint8_t const *aad, //!< Additional Authentication Data (AAD)
                 uint64_t aad_len    //!< Length of AAD
);

/**
 * @brief Encrypt a block of a AES-128-GCM Encryption message
 *
 * @deprecated Please use isal_aes_gcm_enc_128_update() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_enc_128_update() instead.")
void
aes_gcm_enc_128_update(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                       struct isal_gcm_context_data *context_data, //!< GCM operation context data
                       uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed.
                       const uint8_t *in, //!< Plaintext input
                       uint64_t len       //!< Length of data in Bytes for encryption
);

/**
 * @brief Encrypt a block of a AES-256-GCM Encryption message
 *
 * @deprecated Please use isal_aes_gcm_enc_256_update() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_enc_256_update() instead.")
void
aes_gcm_enc_256_update(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                       struct isal_gcm_context_data *context_data, //!< GCM operation context data
                       uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed.
                       const uint8_t *in, //!< Plaintext input
                       uint64_t len       //!< Length of data in Bytes for encryption
);

/**
 * @brief Decrypt a block of a AES-128-GCM Encryption message
 *
 * @deprecated Please use isal_aes_gcm_dec_128_update() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_dec_128_update() instead.")
void
aes_gcm_dec_128_update(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                       struct isal_gcm_context_data *context_data, //!< GCM operation context data
                       uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed.
                       const uint8_t *in, //!< Ciphertext input
                       uint64_t len       //!< Length of data in Bytes for decryption
);

/**
 * @brief Decrypt a block of a AES-256-GCM Encryption message
 *
 * @deprecated Please use isal_aes_gcm_dec_256_update() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_dec_256_update() instead.")
void
aes_gcm_dec_256_update(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                       struct isal_gcm_context_data *context_data, //!< GCM operation context data
                       uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed.
                       const uint8_t *in, //!< Ciphertext input
                       uint64_t len       //!< Length of data in Bytes for decryption
);

/**
 * @brief End encryption of a AES-128-GCM Encryption message
 *
 * @deprecated Please use isal_aes_gcm_enc_128_finalize() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_enc_128_finalize() instead.")
void
aes_gcm_enc_128_finalize(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                         struct isal_gcm_context_data *context_data, //!< GCM operation context data
                         uint8_t *auth_tag,                          //!< Authenticated Tag output
                         uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a
                                               //!< multiple of 4 bytes).
                                               //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief End encryption of a AES-256-GCM Encryption message
 *
 * @deprecated Please use isal_aes_gcm_enc_256_finalize() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_enc_256_finalize() instead.")
void
aes_gcm_enc_256_finalize(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                         struct isal_gcm_context_data *context_data, //!< GCM operation context data
                         uint8_t *auth_tag,                          //!< Authenticated Tag output
                         uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a
                                               //!< multiple of 4 bytes).
                                               //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief End decryption of a AES-128-GCM Encryption message
 *
 * @deprecated Please use isal_aes_gcm_dec_128_finalize() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_dec_128_finalize() instead.")
void
aes_gcm_dec_128_finalize(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                         struct isal_gcm_context_data *context_data, //!< GCM operation context data
                         uint8_t *auth_tag,                          //!< Authenticated Tag output
                         uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a
                                               //!< multiple of 4 bytes).
                                               //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief End decryption of a AES-256-GCM Encryption message
 *
 * @deprecated Please use isal_aes_gcm_dec_256_finalize() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_dec_256_finalize() instead.")
void
aes_gcm_dec_256_finalize(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                         struct isal_gcm_context_data *context_data, //!< GCM operation context data
                         uint8_t *auth_tag,                          //!< Authenticated Tag output
                         uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a
                                               //!< multiple of 4 bytes).
                                               //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief Pre-processes GCM key data 128 bit
 *
 * Prefills the gcm key data with key values for each round and
 * the initial sub hash key for tag encoding
 *
 * @deprecated Please use isal_aes_gcm_pre_128() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_pre_128() instead.")
void
aes_gcm_pre_128(const void *key,                   //!< Pointer to key data
                struct isal_gcm_key_data *key_data //!< GCM expanded key data
);

/**
 * @brief Pre-processes GCM key data 128 bit
 *
 * Prefills the gcm key data with key values for each round and
 * the initial sub hash key for tag encoding
 *
 * @deprecated Please use isal_aes_gcm_pre_256() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_pre_256() instead.")
void
aes_gcm_pre_256(const void *key,                   //!< Pointer to key data
                struct isal_gcm_key_data *key_data //!< GCM expanded key data
);

/* ---- NT versions ---- */
/**
 * @brief GCM-AES Encryption using 128 bit keys, Non-temporal data
 *
 * Non-temporal version of encrypt has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @deprecated Please use isal_aes_gcm_enc_128_nt() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_enc_128_nt() instead.")
void
aes_gcm_enc_128_nt(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                   struct isal_gcm_context_data *context_data, //!< GCM operation context data
                   uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed
                   uint8_t const *in, //!< Plaintext input
                   uint64_t len,      //!< Length of data in Bytes for encryption
                   uint8_t *iv,       //!< iv pointer to 12 byte IV structure.
                   //!< Internally, library concates 0x00000001 value to it.
                   uint8_t const *aad,   //!< Additional Authentication Data (AAD)
                   uint64_t aad_len,     //!< Length of AAD
                   uint8_t *auth_tag,    //!< Authenticated Tag output
                   uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple
                                         //!< of 4 bytes).
                                         //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Encryption using 256 bit keys, Non-temporal data
 *
 * Non-temporal version of encrypt has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @deprecated Please use isal_aes_gcm_enc_256_nt() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_enc_256_nt() instead.")
void
aes_gcm_enc_256_nt(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                   struct isal_gcm_context_data *context_data, //!< GCM operation context data
                   uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed
                   uint8_t const *in, //!< Plaintext input
                   uint64_t len,      //!< Length of data in Bytes for encryption
                   uint8_t *iv,       //!< iv pointer to 12 byte IV structure.
                   //!< Internally, library concates 0x00000001 value to it.
                   uint8_t const *aad,   //!< Additional Authentication Data (AAD)
                   uint64_t aad_len,     //!< Length of AAD
                   uint8_t *auth_tag,    //!< Authenticated Tag output
                   uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple
                                         //!< of 4 bytes).
                                         //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Decryption using 128 bit keys, Non-temporal data
 *
 * Non-temporal version of decrypt has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @deprecated Please use isal_aes_gcm_dec_128_nt() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_dec_128_nt() instead.")
void
aes_gcm_dec_128_nt(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                   struct isal_gcm_context_data *context_data, //!< GCM operation context data
                   uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed
                   uint8_t const *in, //!< Ciphertext input
                   uint64_t len,      //!< Length of data in Bytes for decryption
                   uint8_t *iv,       //!< iv pointer to 12 byte IV structure.
                   //!< Internally, library concates 0x00000001 value to it.
                   uint8_t const *aad,   //!< Additional Authentication Data (AAD)
                   uint64_t aad_len,     //!< Length of AAD
                   uint8_t *auth_tag,    //!< Authenticated Tag output
                   uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple
                                         //!< of 4 bytes).
                                         //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Decryption using 128 bit keys, Non-temporal data
 *
 * Non-temporal version of decrypt has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @deprecated Please use isal_aes_gcm_dec_256_nt() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_dec_256_nt() instead.")
void
aes_gcm_dec_256_nt(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                   struct isal_gcm_context_data *context_data, //!< GCM operation context data
                   uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed
                   uint8_t const *in, //!< Ciphertext input
                   uint64_t len,      //!< Length of data in Bytes for decryption
                   uint8_t *iv,       //!< iv pointer to 12 byte IV structure.
                   //!< Internally, library concates 0x00000001 value to it.
                   uint8_t const *aad,   //!< Additional Authentication Data (AAD)
                   uint64_t aad_len,     //!< Length of AAD
                   uint8_t *auth_tag,    //!< Authenticated Tag output
                   uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple
                                         //!< of 4 bytes).
                                         //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief Encrypt a block of a AES-128-GCM Encryption message, Non-temporal data
 *
 * Non-temporal version of encrypt update has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - All partial input buffers must be a multiple of 64 bytes long except for
 *   the last input buffer.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @deprecated Please use isal_aes_gcm_enc_128_update_nt() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_enc_128_update_nt() instead.")
void
aes_gcm_enc_128_update_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed.
        const uint8_t *in, //!< Plaintext input
        uint64_t len       //!< Length of data in Bytes for encryption
);

/**
 * @brief Encrypt a block of a AES-256-GCM Encryption message, Non-temporal data
 *
 * Non-temporal version of encrypt update has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - All partial input buffers must be a multiple of 64 bytes long except for
 *   the last input buffer.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @deprecated Please use isal_aes_gcm_enc_256_update_nt() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_enc_256_update_nt() instead.")
void
aes_gcm_enc_256_update_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed.
        const uint8_t *in, //!< Plaintext input
        uint64_t len       //!< Length of data in Bytes for encryption
);

/**
 * @brief Decrypt a block of a AES-128-GCM Encryption message, Non-temporal data
 *
 * Non-temporal version of decrypt update has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - All partial input buffers must be a multiple of 64 bytes long except for
 *   the last input buffer.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @deprecated Please use isal_aes_gcm_dec_128_update_nt() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_dec_128_update_nt() instead.")
void
aes_gcm_dec_128_update_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed.
        const uint8_t *in, //!< Ciphertext input
        uint64_t len       //!< Length of data in Bytes for decryption
);

/**
 * @brief Decrypt a block of a AES-256-GCM Encryption message, Non-temporal data
 *
 * Non-temporal version of decrypt update has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - All partial input buffers must be a multiple of 64 bytes long except for
 *   the last input buffer.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @deprecated Please use isal_aes_gcm_dec_256_update_nt() instead.
 * @requires SSE4.1 and AESNI
 */
ISAL_DEPRECATED("Please use isal_aes_gcm_dec_256_update_nt() instead.")
void
aes_gcm_dec_256_update_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed.
        const uint8_t *in, //!< Ciphertext input
        uint64_t len       //!< Length of data in Bytes for decryption
);

/**
 * @brief GCM-AES Encryption using 128 bit keys
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_enc_128(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,       //!< Ciphertext output. Encrypt in-place is allowed
        const uint8_t *in,  //!< Plaintext input
        const uint64_t len, //!< Length of data in Bytes for encryption
        const uint8_t *iv,  //!< iv pointer to 12 byte IV structure.
        //!< Internally, library concates 0x00000001 value to it.
        const uint8_t *aad,         //!< Additional Authenticated Data (AAD)
        const uint64_t aad_len,     //!< Length of AAD
        uint8_t *auth_tag,          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple of
                                    //!< 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Encryption using 256 bit keys
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_enc_256(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,       //!< Ciphertext output. Encrypt in-place is allowed
        const uint8_t *in,  //!< Plaintext input
        const uint64_t len, //!< Length of data in Bytes for encryption
        const uint8_t *iv,  //!< iv pointer to 12 byte IV structure.
        //!< Internally, library concates 0x00000001 value to it.
        const uint8_t *aad,         //!< Additional Authenticated Data (AAD)
        const uint64_t aad_len,     //!< Length of AAD
        uint8_t *auth_tag,          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple of
                                    //!< 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Decryption using 128 bit keys
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_dec_128(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,       //!< Plaintext output. Decrypt in-place is allowed
        const uint8_t *in,  //!< Ciphertext input
        const uint64_t len, //!< Length of data in Bytes for decryption
        const uint8_t *iv,  //!< iv pointer to 12 byte IV structure.
        //!< Internally, library concates 0x00000001 value to it.
        const uint8_t *aad,         //!< Additional Authenticated Data (AAD)
        const uint64_t aad_len,     //!< Length of AAD
        uint8_t *auth_tag,          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple of
                                    //!< 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Decryption using 128 bit keys
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_dec_256(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,       //!< Plaintext output. Decrypt in-place is allowed
        const uint8_t *in,  //!< Ciphertext input
        const uint64_t len, //!< Length of data in Bytes for decryption
        const uint8_t *iv,  //!< iv pointer to 12 byte IV structure.
        //!< Internally, library concates 0x00000001 value to it.
        const uint8_t *aad,         //!< Additional Authenticated Data (AAD)
        const uint64_t aad_len,     //!< Length of AAD
        uint8_t *auth_tag,          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple of
                                    //!< 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief Start a AES-GCM Encryption message 128 bit key
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_init_128(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                      struct isal_gcm_context_data *context_data, //!< GCM operation context data
                      const uint8_t *iv, //!< Pointer to 12 byte IV structure
                      //!< Internally, library concates 0x00000001 value to it
                      const uint8_t *aad,    //!< Additional Authenticated Data (AAD)
                      const uint64_t aad_len //!< Length of AAD
);

/**
 * @brief Start a AES-GCM Encryption message 256 bit key
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_init_256(const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
                      struct isal_gcm_context_data *context_data, //!< GCM operation context data
                      const uint8_t *iv, //!< Pointer to 12 byte IV structure
                      //!< Internally, library concates 0x00000001 value to it
                      const uint8_t *aad,    //!< Additional Authenticated Data (AAD)
                      const uint64_t aad_len //!< Length of AAD
);

/**
 * @brief Encrypt a block of a AES-128-GCM Encryption message
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_enc_128_update(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed.
        const uint8_t *in, //!< Plaintext input
        const uint64_t len //!< Length of data in Bytes for encryption
);

/**
 * @brief Encrypt a block of a AES-256-GCM Encryption message
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_enc_256_update(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed.
        const uint8_t *in, //!< Plaintext input
        const uint64_t len //!< Length of data in Bytes for encryption
);

/**
 * @brief Decrypt a block of a AES-128-GCM Encryption message
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_dec_128_update(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed.
        const uint8_t *in, //!< Ciphertext input
        const uint64_t len //!< Length of data in Bytes for decryption
);

/**
 * @brief Decrypt a block of a AES-256-GCM Encryption message
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_dec_256_update(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed.
        const uint8_t *in, //!< Ciphertext input
        const uint64_t len //!< Length of data in Bytes for decryption
);

/**
 * @brief End encryption of a AES-128-GCM Encryption message
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_enc_128_finalize(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *auth_tag,                          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a
                                    //!< multiple of 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief End encryption of a AES-256-GCM Encryption message
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_enc_256_finalize(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *auth_tag,                          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a
                                    //!< multiple of 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief End decryption of a AES-128-GCM Encryption message
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_dec_128_finalize(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *auth_tag,                          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a
                                    //!< multiple of 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief End decryption of a AES-256-GCM Encryption message
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_dec_256_finalize(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *auth_tag,                          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a
                                    //!< multiple of 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief Pre-processes GCM key data 128 bit
 *
 * Prefills the gcm key data with key values for each round and
 * the initial sub hash key for tag encoding
 *
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_pre_128(const void *key,                   //!< Pointer to key data
                     struct isal_gcm_key_data *key_data //!< GCM expanded key data
);

/**
 * @brief Pre-processes GCM key data 256 bit
 *
 * Prefills the gcm key data with key values for each round and
 * the initial sub hash key for tag encoding
 *
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_pre_256(const void *key,                   //!< Pointer to key data
                     struct isal_gcm_key_data *key_data //!< GCM expanded key data
);

/* ---- NT versions ---- */
/**
 * @brief GCM-AES Encryption using 128 bit keys, Non-temporal data
 *
 * Non-temporal version of encrypt has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_enc_128_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,       //!< Ciphertext output. Encrypt in-place is allowed
        const uint8_t *in,  //!< Plaintext input
        const uint64_t len, //!< Length of data in Bytes for encryption
        const uint8_t *iv,  //!< iv pointer to 12 byte IV structure.
        //!< Internally, library concates 0x00000001 value to it.
        const uint8_t *aad,         //!< Additional Authenticated Data (AAD)
        const uint64_t aad_len,     //!< Length of AAD
        uint8_t *auth_tag,          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple
                                    //!< of 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Encryption using 256 bit keys, Non-temporal data
 *
 * Non-temporal version of encrypt has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_enc_256_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,       //!< Ciphertext output. Encrypt in-place is allowed
        const uint8_t *in,  //!< Plaintext input
        const uint64_t len, //!< Length of data in Bytes for encryption
        const uint8_t *iv,  //!< iv pointer to 12 byte IV structure.
        //!< Internally, library concates 0x00000001 value to it.
        const uint8_t *aad,         //!< Additional Authenticated Data (AAD)
        const uint64_t aad_len,     //!< Length of AAD
        uint8_t *auth_tag,          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple
                                    //!< of 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Decryption using 128 bit keys, Non-temporal data
 *
 * Non-temporal version of decrypt has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_dec_128_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,       //!< Plaintext output. Decrypt in-place is allowed
        const uint8_t *in,  //!< Ciphertext input
        const uint64_t len, //!< Length of data in Bytes for decryption
        const uint8_t *iv,  //!< iv pointer to 12 byte IV structure.
        //!< Internally, library concates 0x00000001 value to it.
        const uint8_t *aad,         //!< Additional Authenticated Data (AAD)
        const uint64_t aad_len,     //!< Length of AAD
        uint8_t *auth_tag,          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple
                                    //!< of 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief GCM-AES Decryption using 128 bit keys, Non-temporal data
 *
 * Non-temporal version of decrypt has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_dec_256_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,       //!< Plaintext output. Decrypt in-place is allowed
        const uint8_t *in,  //!< Ciphertext input
        const uint64_t len, //!< Length of data in Bytes for decryption
        const uint8_t *iv,  //!< iv pointer to 12 byte IV structure.
        //!< Internally, library concates 0x00000001 value to it.
        const uint8_t *aad,         //!< Additional Authenticated Data (AAD)
        const uint64_t aad_len,     //!< Length of AAD
        uint8_t *auth_tag,          //!< Authenticated Tag output
        const uint64_t auth_tag_len //!< Authenticated Tag Length in bytes (must be a multiple
                                    //!< of 4 bytes).
                                    //!< Valid values are 16 (most likely), 12 or 8
);

/**
 * @brief Encrypt a block of a AES-128-GCM Encryption message, Non-temporal data
 *
 * Non-temporal version of encrypt update has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - All partial input buffers must be a multiple of 64 bytes long except for
 *   the last input buffer.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_enc_128_update_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed.
        const uint8_t *in, //!< Plaintext input
        const uint64_t len //!< Length of data in Bytes for encryption
);

/**
 * @brief Encrypt a block of a AES-256-GCM Encryption message, Non-temporal data
 *
 * Non-temporal version of encrypt update has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - All partial input buffers must be a multiple of 64 bytes long except for
 *   the last input buffer.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_enc_256_update_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Ciphertext output. Encrypt in-place is allowed.
        const uint8_t *in, //!< Plaintext input
        const uint64_t len //!< Length of data in Bytes for encryption
);

/**
 * @brief Decrypt a block of a AES-128-GCM Encryption message, Non-temporal data
 *
 * Non-temporal version of decrypt update has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - All partial input buffers must be a multiple of 64 bytes long except for
 *   the last input buffer.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_dec_128_update_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed.
        const uint8_t *in, //!< Ciphertext input
        const uint64_t len //!< Length of data in Bytes for decryption
);

/**
 * @brief Decrypt a block of a AES-256-GCM Encryption message, Non-temporal data
 *
 * Non-temporal version of decrypt update has additional restrictions:
 * - The plaintext and ciphertext buffers must be aligned on a 64 byte boundary.
 * - All partial input buffers must be a multiple of 64 bytes long except for
 *   the last input buffer.
 * - In-place encryption/decryption is not recommended. Performance can be slow.
 *
 * @requires AES extensions and SSE4.1 for x86 or ASIMD for ARM
 *
 * @return Operation status
 * @retval 0 on success
 * @retval Non-zero \a ISAL_CRYPTO_ERR on failure
 */
int
isal_aes_gcm_dec_256_update_nt(
        const struct isal_gcm_key_data *key_data,   //!< GCM expanded key data
        struct isal_gcm_context_data *context_data, //!< GCM operation context data
        uint8_t *out,      //!< Plaintext output. Decrypt in-place is allowed.
        const uint8_t *in, //!< Ciphertext input
        const uint64_t len //!< Length of data in Bytes for decryption
);

#ifdef __cplusplus
}
#endif //__cplusplus
#endif // ifndef _AES_GCM_h