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Added POWER8 implementation for AES/CTR+CBC-MAC (for CCM and EAX modes).

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This commit is contained in:
Thomas Pornin 2018-08-12 23:53:23 +02:00
parent ffe3c9166b
commit f8e38c231d
10 changed files with 1105 additions and 3 deletions
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100
inc/bearssl_block.h
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@ -1919,6 +1919,24 @@ typedef struct {
#endif
} br_aes_pwr8_ctr_keys;
/**
* \brief Context for AES subkeys (`aes_pwr8` implementation, CTR encryption
* and decryption + CBC-MAC).
*
* First field is a pointer to the vtable; it is set by the initialisation
* function. Other fields are not supposed to be accessed by user code.
*/
typedef struct {
/** \brief Pointer to vtable for this context. */
const br_block_ctrcbc_class *vtable;
#ifndef BR_DOXYGEN_IGNORE
union {
unsigned char skni[16 * 15];
} skey;
unsigned num_rounds;
#endif
} br_aes_pwr8_ctrcbc_keys;
/**
* \brief Class instance for AES CBC encryption (`aes_pwr8` implementation).
*
@ -1947,6 +1965,16 @@ extern const br_block_cbcdec_class br_aes_pwr8_cbcdec_vtable;
*/
extern const br_block_ctr_class br_aes_pwr8_ctr_vtable;
/**
* \brief Class instance for AES CTR encryption/decryption + CBC-MAC
* (`aes_pwr8` implementation).
*
* Since this implementation might be omitted from the library, or the
* AES opcode unavailable on the current CPU, a pointer to this class
* instance should be obtained through `br_aes_pwr8_ctrcbc_get_vtable()`.
*/
extern const br_block_ctrcbc_class br_aes_pwr8_ctrcbc_vtable;
/**
* \brief Context initialisation (key schedule) for AES CBC encryption
* (`aes_pwr8` implementation).
@ -1980,6 +2008,17 @@ void br_aes_pwr8_cbcdec_init(br_aes_pwr8_cbcdec_keys *ctx,
void br_aes_pwr8_ctr_init(br_aes_pwr8_ctr_keys *ctx,
const void *key, size_t len);
/**
* \brief Context initialisation (key schedule) for AES CTR + CBC-MAC
* (`aes_pwr8` implementation).
*
* \param ctx context to initialise.
* \param key secret key.
* \param len secret key length (in bytes).
*/
void br_aes_pwr8_ctrcbc_init(br_aes_pwr8_ctrcbc_keys *ctx,
const void *key, size_t len);
/**
* \brief CBC encryption with AES (`aes_pwr8` implementation).
*
@ -2015,6 +2054,52 @@ void br_aes_pwr8_cbcdec_run(const br_aes_pwr8_cbcdec_keys *ctx, void *iv,
uint32_t br_aes_pwr8_ctr_run(const br_aes_pwr8_ctr_keys *ctx,
const void *iv, uint32_t cc, void *data, size_t len);
/**
* \brief CTR encryption + CBC-MAC with AES (`aes_pwr8` implementation).
*
* \param ctx context (already initialised).
* \param ctr counter for CTR (16 bytes, updated).
* \param cbcmac IV for CBC-MAC (updated).
* \param data data to encrypt (updated).
* \param len data length (in bytes, MUST be a multiple of 16).
*/
void br_aes_pwr8_ctrcbc_encrypt(const br_aes_pwr8_ctrcbc_keys *ctx,
void *ctr, void *cbcmac, void *data, size_t len);
/**
* \brief CTR decryption + CBC-MAC with AES (`aes_pwr8` implementation).
*
* \param ctx context (already initialised).
* \param ctr counter for CTR (16 bytes, updated).
* \param cbcmac IV for CBC-MAC (updated).
* \param data data to decrypt (updated).
* \param len data length (in bytes, MUST be a multiple of 16).
*/
void br_aes_pwr8_ctrcbc_decrypt(const br_aes_pwr8_ctrcbc_keys *ctx,
void *ctr, void *cbcmac, void *data, size_t len);
/**
* \brief CTR encryption/decryption with AES (`aes_pwr8` implementation).
*
* \param ctx context (already initialised).
* \param ctr counter for CTR (16 bytes, updated).
* \param data data to MAC (updated).
* \param len data length (in bytes, MUST be a multiple of 16).
*/
void br_aes_pwr8_ctrcbc_ctr(const br_aes_pwr8_ctrcbc_keys *ctx,
void *ctr, void *data, size_t len);
/**
* \brief CBC-MAC with AES (`aes_pwr8` implementation).
*
* \param ctx context (already initialised).
* \param cbcmac IV for CBC-MAC (updated).
* \param data data to MAC (unmodified).
* \param len data length (in bytes, MUST be a multiple of 16).
*/
void br_aes_pwr8_ctrcbc_mac(const br_aes_pwr8_ctrcbc_keys *ctx,
void *cbcmac, const void *data, size_t len);
/**
* \brief Obtain the `aes_pwr8` AES-CBC (encryption) implementation, if
* available.
@ -2053,6 +2138,19 @@ const br_block_cbcdec_class *br_aes_pwr8_cbcdec_get_vtable(void);
*/
const br_block_ctr_class *br_aes_pwr8_ctr_get_vtable(void);
/**
* \brief Obtain the `aes_pwr8` AES-CTR + CBC-MAC implementation, if
* available.
*
* This function returns a pointer to `br_aes_pwr8_ctrcbc_vtable`, if
* that implementation was compiled in the library _and_ the POWER8 AES
* opcodes are available on the currently running CPU. If either of
* these conditions is not met, then this function returns `NULL`.
*
* \return the `aes_pwr8` AES-CTR implementation, or `NULL`.
*/
const br_block_ctrcbc_class *br_aes_pwr8_ctrcbc_get_vtable(void);
/**
* \brief Aggregate structure large enough to be used as context for
* subkeys (CBC encryption) for all AES implementations.
@ -2106,9 +2204,7 @@ typedef union {
br_aes_ct_ctrcbc_keys c_ct;
br_aes_ct64_ctrcbc_keys c_ct64;
br_aes_x86ni_ctrcbc_keys c_x86ni;
/* FIXME
br_aes_pwr8_ctrcbc_keys c_pwr8;
*/
} br_aes_gen_ctrcbc_keys;
/*