X-Git-Url: https://bearssl.org/gitweb//home/git/?p=BearSSL;a=blobdiff_plain;f=inc%2Fbearssl_block.h;h=415bc28fb61b0625c479015903a8620bd701dfbd;hp=547f3b28a5b683d92382ab63ca5f3f75a5bf3c40;hb=042986b989521f0ae1e2fe3819c72f2fabcb70a6;hpb=b42bd5972f935ffc32019acac6f8a07ae08ae9c2 diff --git a/inc/bearssl_block.h b/inc/bearssl_block.h index 547f3b2..415bc28 100644 --- a/inc/bearssl_block.h +++ b/inc/bearssl_block.h @@ -28,6 +28,10 @@ #include #include +#ifdef __cplusplus +extern "C" { +#endif + /** \file bearssl_block.h * * # Block Ciphers and Symmetric Ciphers @@ -191,6 +195,8 @@ * | aes_small | AES | 16 | 16, 24 and 32 | * | aes_ct | AES | 16 | 16, 24 and 32 | * | aes_ct64 | AES | 16 | 16, 24 and 32 | + * | aes_x86ni | AES | 16 | 16, 24 and 32 | + * | aes_pwr8 | AES | 16 | 16, 24 and 32 | * | des_ct | DES/3DES | 8 | 8, 16 and 24 | * | des_tab | DES/3DES | 8 | 8, 16 and 24 | * @@ -223,6 +229,13 @@ * is typically twice faster than `aes_ct` for modes that allow parallel * operations (i.e. CTR, and CBC decryption, but not CBC encryption). * + * `aes_x86ni` exists only on x86 architectures (32-bit and 64-bit). It + * uses the AES-NI opcodes when available. + * + * `aes_pwr8` exists only on PowerPC / POWER architectures (32-bit and + * 64-bit, both little-endian and big-endian). It uses the AES opcodes + * present in POWER8 and later. + * * `des_tab` is a classic, table-based implementation of DES/3DES. It * is not constant-time. * @@ -994,16 +1007,404 @@ void br_aes_ct64_cbcdec_run(const br_aes_ct64_cbcdec_keys *ctx, void *iv, uint32_t br_aes_ct64_ctr_run(const br_aes_ct64_ctr_keys *ctx, const void *iv, uint32_t cc, void *data, size_t len); +/* + * AES implementation using AES-NI opcodes (x86 platform). + */ + +/** \brief AES block size (16 bytes). */ +#define br_aes_x86ni_BLOCK_SIZE 16 + +/** + * \brief Context for AES subkeys (`aes_x86ni` implementation, CBC encryption). + * + * 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_cbcenc_class *vtable; +#ifndef BR_DOXYGEN_IGNORE + union { + unsigned char skni[16 * 15]; + } skey; + unsigned num_rounds; +#endif +} br_aes_x86ni_cbcenc_keys; + +/** + * \brief Context for AES subkeys (`aes_x86ni` implementation, CBC decryption). + * + * 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_cbcdec_class *vtable; +#ifndef BR_DOXYGEN_IGNORE + union { + unsigned char skni[16 * 15]; + } skey; + unsigned num_rounds; +#endif +} br_aes_x86ni_cbcdec_keys; + +/** + * \brief Context for AES subkeys (`aes_x86ni` implementation, CTR encryption + * and decryption). + * + * 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_ctr_class *vtable; +#ifndef BR_DOXYGEN_IGNORE + union { + unsigned char skni[16 * 15]; + } skey; + unsigned num_rounds; +#endif +} br_aes_x86ni_ctr_keys; + +/** + * \brief Class instance for AES CBC encryption (`aes_x86ni` 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_x86ni_cbcenc_get_vtable()`. + */ +extern const br_block_cbcenc_class br_aes_x86ni_cbcenc_vtable; + +/** + * \brief Class instance for AES CBC decryption (`aes_x86ni` 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_x86ni_cbcdec_get_vtable()`. + */ +extern const br_block_cbcdec_class br_aes_x86ni_cbcdec_vtable; + +/** + * \brief Class instance for AES CTR encryption and decryption + * (`aes_x86ni` 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_x86ni_ctr_get_vtable()`. + */ +extern const br_block_ctr_class br_aes_x86ni_ctr_vtable; + +/** + * \brief Context initialisation (key schedule) for AES CBC encryption + * (`aes_x86ni` implementation). + * + * \param ctx context to initialise. + * \param key secret key. + * \param len secret key length (in bytes). + */ +void br_aes_x86ni_cbcenc_init(br_aes_x86ni_cbcenc_keys *ctx, + const void *key, size_t len); + +/** + * \brief Context initialisation (key schedule) for AES CBC decryption + * (`aes_x86ni` implementation). + * + * \param ctx context to initialise. + * \param key secret key. + * \param len secret key length (in bytes). + */ +void br_aes_x86ni_cbcdec_init(br_aes_x86ni_cbcdec_keys *ctx, + const void *key, size_t len); + +/** + * \brief Context initialisation (key schedule) for AES CTR encryption + * and decryption (`aes_x86ni` implementation). + * + * \param ctx context to initialise. + * \param key secret key. + * \param len secret key length (in bytes). + */ +void br_aes_x86ni_ctr_init(br_aes_x86ni_ctr_keys *ctx, + const void *key, size_t len); + +/** + * \brief CBC encryption with AES (`aes_x86ni` implementation). + * + * \param ctx context (already initialised). + * \param iv IV (updated). + * \param data data to encrypt (updated). + * \param len data length (in bytes, MUST be multiple of 16). + */ +void br_aes_x86ni_cbcenc_run(const br_aes_x86ni_cbcenc_keys *ctx, void *iv, + void *data, size_t len); + +/** + * \brief CBC decryption with AES (`aes_x86ni` implementation). + * + * \param ctx context (already initialised). + * \param iv IV (updated). + * \param data data to decrypt (updated). + * \param len data length (in bytes, MUST be multiple of 16). + */ +void br_aes_x86ni_cbcdec_run(const br_aes_x86ni_cbcdec_keys *ctx, void *iv, + void *data, size_t len); + +/** + * \brief CTR encryption and decryption with AES (`aes_x86ni` implementation). + * + * \param ctx context (already initialised). + * \param iv IV (constant, 12 bytes). + * \param cc initial block counter value. + * \param data data to decrypt (updated). + * \param len data length (in bytes). + * \return new block counter value. + */ +uint32_t br_aes_x86ni_ctr_run(const br_aes_x86ni_ctr_keys *ctx, + const void *iv, uint32_t cc, void *data, size_t len); + +/** + * \brief Obtain the `aes_x86ni` AES-CBC (encryption) implementation, if + * available. + * + * This function returns a pointer to `br_aes_x86ni_cbcenc_vtable`, if + * that implementation was compiled in the library _and_ the x86 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_x868ni` AES-CBC (encryption) implementation, or `NULL`. + */ +const br_block_cbcenc_class *br_aes_x86ni_cbcenc_get_vtable(void); + +/** + * \brief Obtain the `aes_x86ni` AES-CBC (decryption) implementation, if + * available. + * + * This function returns a pointer to `br_aes_x86ni_cbcdec_vtable`, if + * that implementation was compiled in the library _and_ the x86 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_x868ni` AES-CBC (decryption) implementation, or `NULL`. + */ +const br_block_cbcdec_class *br_aes_x86ni_cbcdec_get_vtable(void); + +/** + * \brief Obtain the `aes_x86ni` AES-CTR implementation, if available. + * + * This function returns a pointer to `br_aes_x86ni_ctr_vtable`, if + * that implementation was compiled in the library _and_ the x86 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_x868ni` AES-CTR implementation, or `NULL`. + */ +const br_block_ctr_class *br_aes_x86ni_ctr_get_vtable(void); + +/* + * AES implementation using POWER8 opcodes. + */ + +/** \brief AES block size (16 bytes). */ +#define br_aes_pwr8_BLOCK_SIZE 16 + +/** + * \brief Context for AES subkeys (`aes_pwr8` implementation, CBC encryption). + * + * 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_cbcenc_class *vtable; +#ifndef BR_DOXYGEN_IGNORE + union { + unsigned char skni[16 * 15]; + } skey; + unsigned num_rounds; +#endif +} br_aes_pwr8_cbcenc_keys; + +/** + * \brief Context for AES subkeys (`aes_pwr8` implementation, CBC decryption). + * + * 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_cbcdec_class *vtable; +#ifndef BR_DOXYGEN_IGNORE + union { + unsigned char skni[16 * 15]; + } skey; + unsigned num_rounds; +#endif +} br_aes_pwr8_cbcdec_keys; + +/** + * \brief Context for AES subkeys (`aes_pwr8` implementation, CTR encryption + * and decryption). + * + * 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_ctr_class *vtable; +#ifndef BR_DOXYGEN_IGNORE + union { + unsigned char skni[16 * 15]; + } skey; + unsigned num_rounds; +#endif +} br_aes_pwr8_ctr_keys; + +/** + * \brief Class instance for AES CBC encryption (`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_cbcenc_get_vtable()`. + */ +extern const br_block_cbcenc_class br_aes_pwr8_cbcenc_vtable; + +/** + * \brief Class instance for AES CBC decryption (`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_cbcdec_get_vtable()`. + */ +extern const br_block_cbcdec_class br_aes_pwr8_cbcdec_vtable; + +/** + * \brief Class instance for AES CTR encryption and decryption + * (`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_ctr_get_vtable()`. + */ +extern const br_block_ctr_class br_aes_pwr8_ctr_vtable; + +/** + * \brief Context initialisation (key schedule) for AES CBC encryption + * (`aes_pwr8` implementation). + * + * \param ctx context to initialise. + * \param key secret key. + * \param len secret key length (in bytes). + */ +void br_aes_pwr8_cbcenc_init(br_aes_pwr8_cbcenc_keys *ctx, + const void *key, size_t len); + +/** + * \brief Context initialisation (key schedule) for AES CBC decryption + * (`aes_pwr8` implementation). + * + * \param ctx context to initialise. + * \param key secret key. + * \param len secret key length (in bytes). + */ +void br_aes_pwr8_cbcdec_init(br_aes_pwr8_cbcdec_keys *ctx, + const void *key, size_t len); + +/** + * \brief Context initialisation (key schedule) for AES CTR encryption + * and decryption (`aes_pwr8` implementation). + * + * \param ctx context to initialise. + * \param key secret key. + * \param len secret key length (in bytes). + */ +void br_aes_pwr8_ctr_init(br_aes_pwr8_ctr_keys *ctx, + const void *key, size_t len); + +/** + * \brief CBC encryption with AES (`aes_pwr8` implementation). + * + * \param ctx context (already initialised). + * \param iv IV (updated). + * \param data data to encrypt (updated). + * \param len data length (in bytes, MUST be multiple of 16). + */ +void br_aes_pwr8_cbcenc_run(const br_aes_pwr8_cbcenc_keys *ctx, void *iv, + void *data, size_t len); + +/** + * \brief CBC decryption with AES (`aes_pwr8` implementation). + * + * \param ctx context (already initialised). + * \param iv IV (updated). + * \param data data to decrypt (updated). + * \param len data length (in bytes, MUST be multiple of 16). + */ +void br_aes_pwr8_cbcdec_run(const br_aes_pwr8_cbcdec_keys *ctx, void *iv, + void *data, size_t len); + +/** + * \brief CTR encryption and decryption with AES (`aes_pwr8` implementation). + * + * \param ctx context (already initialised). + * \param iv IV (constant, 12 bytes). + * \param cc initial block counter value. + * \param data data to decrypt (updated). + * \param len data length (in bytes). + * \return new block counter value. + */ +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 Obtain the `aes_pwr8` AES-CBC (encryption) implementation, if + * available. + * + * This function returns a pointer to `br_aes_pwr8_cbcenc_vtable`, if + * that implementation was compiled in the library _and_ the POWER8 + * crypto 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-CBC (encryption) implementation, or `NULL`. + */ +const br_block_cbcenc_class *br_aes_pwr8_cbcenc_get_vtable(void); + +/** + * \brief Obtain the `aes_pwr8` AES-CBC (decryption) implementation, if + * available. + * + * This function returns a pointer to `br_aes_pwr8_cbcdec_vtable`, if + * that implementation was compiled in the library _and_ the POWER8 + * crypto 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-CBC (decryption) implementation, or `NULL`. + */ +const br_block_cbcdec_class *br_aes_pwr8_cbcdec_get_vtable(void); + +/** + * \brief Obtain the `aes_pwr8` AES-CTR implementation, if available. + * + * This function returns a pointer to `br_aes_pwr8_ctr_vtable`, if that + * implementation was compiled in the library _and_ the POWER8 crypto + * 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_ctr_class *br_aes_pwr8_ctr_get_vtable(void); + /** * \brief Aggregate structure large enough to be used as context for * subkeys (CBC encryption) for all AES implementations. */ typedef union { const br_block_cbcenc_class *vtable; - br_aes_big_cbcenc_keys big; - br_aes_small_cbcenc_keys small; - br_aes_ct_cbcenc_keys ct; - br_aes_ct64_cbcenc_keys ct64; + br_aes_big_cbcenc_keys c_big; + br_aes_small_cbcenc_keys c_small; + br_aes_ct_cbcenc_keys c_ct; + br_aes_ct64_cbcenc_keys c_ct64; + br_aes_x86ni_cbcenc_keys c_x86ni; + br_aes_pwr8_cbcenc_keys c_pwr8; } br_aes_gen_cbcenc_keys; /** @@ -1012,10 +1413,12 @@ typedef union { */ typedef union { const br_block_cbcdec_class *vtable; - br_aes_big_cbcdec_keys big; - br_aes_small_cbcdec_keys small; - br_aes_ct_cbcdec_keys ct; - br_aes_ct64_cbcdec_keys ct64; + br_aes_big_cbcdec_keys c_big; + br_aes_small_cbcdec_keys c_small; + br_aes_ct_cbcdec_keys c_ct; + br_aes_ct64_cbcdec_keys c_ct64; + br_aes_x86ni_cbcdec_keys c_x86ni; + br_aes_pwr8_cbcdec_keys c_pwr8; } br_aes_gen_cbcdec_keys; /** @@ -1024,10 +1427,12 @@ typedef union { */ typedef union { const br_block_ctr_class *vtable; - br_aes_big_ctr_keys big; - br_aes_small_ctr_keys small; - br_aes_ct_ctr_keys ct; - br_aes_ct64_ctr_keys ct64; + br_aes_big_ctr_keys c_big; + br_aes_small_ctr_keys c_small; + br_aes_ct_ctr_keys c_ct; + br_aes_ct64_ctr_keys c_ct64; + br_aes_x86ni_ctr_keys c_x86ni; + br_aes_pwr8_ctr_keys c_pwr8; } br_aes_gen_ctr_keys; /* @@ -1235,8 +1640,8 @@ typedef union { */ typedef union { const br_block_cbcdec_class *vtable; - br_des_tab_cbcdec_keys tab; - br_des_ct_cbcdec_keys ct; + br_des_tab_cbcdec_keys c_tab; + br_des_ct_cbcdec_keys c_ct; } br_des_gen_cbcdec_keys; /** @@ -1248,7 +1653,7 @@ typedef union { * * - IV is 96 bits (`iv` points to exactly 12 bytes). * - * - Block counter is oveer 32 bits and starts at value `cc`; the + * - Block counter is over 32 bits and starts at value `cc`; the * resulting value is returned. * * Data (pointed to by `data`, of length `len`) is encrypted/decrypted @@ -1323,4 +1728,86 @@ void br_poly1305_ctmul_run(const void *key, const void *iv, void *data, size_t len, const void *aad, size_t aad_len, void *tag, br_chacha20_run ichacha, int encrypt); +/** + * \brief ChaCha20+Poly1305 AEAD implementation (pure 32-bit multiplications). + * + * \see br_poly1305_run + * + * \param key secret key (32 bytes). + * \param iv nonce (12 bytes). + * \param data data to encrypt or decrypt. + * \param len data length (in bytes). + * \param aad additional authenticated data. + * \param aad_len length of additional authenticated data (in bytes). + * \param tag output buffer for the authentication tag. + * \param ichacha implementation of ChaCha20. + * \param encrypt non-zero for encryption, zero for decryption. + */ +void br_poly1305_ctmul32_run(const void *key, const void *iv, + void *data, size_t len, const void *aad, size_t aad_len, + void *tag, br_chacha20_run ichacha, int encrypt); + +/** + * \brief ChaCha20+Poly1305 AEAD implementation (i15). + * + * This implementation relies on the generic big integer code "i15" + * (which uses pure 32-bit multiplications). As such, it may save a + * little code footprint in a context where "i15" is already included + * (e.g. for elliptic curves or for RSA); however, it is also + * substantially slower than the ctmul and ctmul32 implementations. + * + * \see br_poly1305_run + * + * \param key secret key (32 bytes). + * \param iv nonce (12 bytes). + * \param data data to encrypt or decrypt. + * \param len data length (in bytes). + * \param aad additional authenticated data. + * \param aad_len length of additional authenticated data (in bytes). + * \param tag output buffer for the authentication tag. + * \param ichacha implementation of ChaCha20. + * \param encrypt non-zero for encryption, zero for decryption. + */ +void br_poly1305_i15_run(const void *key, const void *iv, + void *data, size_t len, const void *aad, size_t aad_len, + void *tag, br_chacha20_run ichacha, int encrypt); + +/** + * \brief ChaCha20+Poly1305 AEAD implementation (ctmulq). + * + * This implementation uses 64-bit multiplications (result over 128 bits). + * It is available only on platforms that offer such a primitive (in + * practice, 64-bit architectures). Use `br_poly1305_ctmulq_get()` to + * dynamically obtain a pointer to that function, or 0 if not supported. + * + * \see br_poly1305_run + * + * \param key secret key (32 bytes). + * \param iv nonce (12 bytes). + * \param data data to encrypt or decrypt. + * \param len data length (in bytes). + * \param aad additional authenticated data. + * \param aad_len length of additional authenticated data (in bytes). + * \param tag output buffer for the authentication tag. + * \param ichacha implementation of ChaCha20. + * \param encrypt non-zero for encryption, zero for decryption. + */ +void br_poly1305_ctmulq_run(const void *key, const void *iv, + void *data, size_t len, const void *aad, size_t aad_len, + void *tag, br_chacha20_run ichacha, int encrypt); + +/** + * \brief Get the ChaCha20+Poly1305 "ctmulq" implementation, if available. + * + * This function returns a pointer to the `br_poly1305_ctmulq_run()` + * function if supported on the current platform; otherwise, it returns 0. + * + * \return the ctmulq ChaCha20+Poly1305 implementation, or 0. + */ +br_poly1305_run br_poly1305_ctmulq_get(void); + +#ifdef __cplusplus +} +#endif + #endif