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IN NO EVENT SHALL THE * * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED * * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * **************************************************************************************/ #ifndef CRYS_EC_EDW_API_H #define CRYS_EC_EDW_API_H #include "ssi_pal_types.h" #include "crys_hash.h" #include "crys_rnd.h" #include "crys_pka_defs_hw.h" #ifdef __cplusplus extern "C" { #endif /*! @defgroup cryptocell_ec CryptoCell EC 25519 curve APIs @{ @ingroup cryptocell_api @brief This group is the cryptocell EC 25519 curve root group @} @file @brief This file contains the CRYS APIs used for EC EDW (Edwards) ed25519 algorithms. @defgroup crys_ec_edw CryptoCell EC Edwards APIs @{ @ingroup cryptocell_ec \note Algorithms of Montgomery and Edwards elliptic curves cryptography were developed by Daniel.J.Bernstein. */ /*! EC Edwards ed25519 modulus and order sizes in bits, words and bytes. */ /*! EC Edwards modulus size in bits. */ #define CRYS_ECEDW_MOD_SIZE_IN_BITS 255U /*!<\internal MOD - EC Edw modulus size*/ /*! EC Edwards order size in bits. */ #define CRYS_ECEDW_ORD_SIZE_IN_BITS 255U /*!<\internal ORD - EC Edw generator order size*/ /*! EC Edwards nodulus size in words. */ #define CRYS_ECEDW_MOD_SIZE_IN_32BIT_WORDS ((CRYS_ECEDW_MOD_SIZE_IN_BITS + SASI_BITS_IN_32BIT_WORD - 1) / SASI_BITS_IN_32BIT_WORD) /*! EC Edwards modulus size in bytes. */ #define CRYS_ECEDW_MOD_SIZE_IN_BYTES (CRYS_ECEDW_MOD_SIZE_IN_32BIT_WORDS * SASI_32BIT_WORD_SIZE) /*! EC Edwards order size in words. */ #define CRYS_ECEDW_ORD_SIZE_IN_32BIT_WORDS ((CRYS_ECEDW_ORD_SIZE_IN_BITS + SASI_BITS_IN_32BIT_WORD - 1) / SASI_BITS_IN_32BIT_WORD) /*! EC Edwards order size in bytes. */ #define CRYS_ECEDW_ORD_SIZE_IN_BYTES (CRYS_ECEDW_ORD_SIZE_IN_32BIT_WORDS * SASI_32BIT_WORD_SIZE) /*! Constant sizes of special EC_MONT buffers and arrays */ /*! EC Edwards seed size in bytes. */ #define CRYS_ECEDW_SEED_BYTES CRYS_ECEDW_MOD_SIZE_IN_BYTES /*! EC Edwards secret key size in bytes. */ #define CRYS_ECEDW_SECRET_KEY_BYTES (2 * CRYS_ECEDW_MOD_SIZE_IN_BYTES) /*! EC Edwards signatue size in bytes. */ #define CRYS_ECEDW_SIGNATURE_BYTES (2 * CRYS_ECEDW_ORD_SIZE_IN_BYTES) /*! EC Edwards scalar size in bytes. */ #define CRYS_ECEDW_SCALAR_BYTES CRYS_ECEDW_ORD_SIZE_IN_BYTES /*! EC Edwards scalar multiplication size in bytes. */ #define CRYS_ECEDW_SCALARMULT_BYTES CRYS_ECEDW_MOD_SIZE_IN_BYTES /*! EC_EDW temp buffer size definition. */ #define CRYS_ECEDW_TEMP_BUFF_SIZE_IN_32BIT_WORD (10*CRYS_EC_MONT_EDW_MODULUS_MAX_SIZE_IN_WORDS + (sizeof(CRYS_HASHUserContext_t)+SASI_32BIT_WORD_SIZE-1)/SASI_32BIT_WORD_SIZE) /*! EC_EDW temp buffer type definition. */ typedef struct { /*! Internal buffer. */ uint32_t buff[CRYS_ECEDW_TEMP_BUFF_SIZE_IN_32BIT_WORD]; } CRYS_ECEDW_TempBuff_t; /******************************************************************************/ /*! @brief The function creates EC Edwards signature on the message. \note Used detached form of signature, separated from the message. Implemented algorithm of Bernstein D. etc. sign ed25519. @return CRYS_OK on success, @return A non-zero value on failure as defined crys_ec_mont_edw_error.h or crys_hash_error.h. */ CIMPORT_C CRYSError_t CRYS_ECEDW_Sign ( uint8_t *pSign, /*!< [out] Pointer to the detached signature. */ size_t *pSignSize, /*!< [in/out] Pointer to the total size of the signature ; In - the buffer size, which (must be at least 2*EC order size); Out - the actual size of output data. */ const uint8_t *pMsg, /*!< [in] Pointer to the message. */ size_t msgSize, /*!< [in] Message size in bytes: must be less, than (CRYS_HASH_UPDATE_DATA_MAX_SIZE_IN_BYTES - 2*(EC_EDW modulus size)). */ const uint8_t *pSignSecrKey, /*!< [in] Pointer to the signer secret key (seed || pulKey) */ size_t secrKeySize, /*!< [in] Size of signer secret key in bytes: (must be 2*EC order size). */ CRYS_ECEDW_TempBuff_t *pTempBuff /*!< [in] Pointer to the temp buffer. */); /******************************************************************************/ /*! @brief The function verifies the EC Edwards ed25519 signature on the message. \note The input signature is in detached form, i.e. separated from the message. @return CRYS_OK on success, @return A non-zero value on failure as defined crys_ec_mont_edw_error.h or crys_hash_error.h. */ CIMPORT_C CRYSError_t CRYS_ECEDW_Verify( const uint8_t *pSign, /*!< [in] Pointer to detached signature, i.e. the signature is separated from the message. */ size_t signSize, /*!< [in] Size of the signature in bytes, it must be equal to two EC Order size in bytes. */ const uint8_t *pSignPublKey, /*!< [in] Pointer to signer public key. */ size_t publKeySize, /*!< [in] Size of the signer public key in bytes; must be equal to EC modulus size. */ uint8_t *pMsg, /*!< [in] Pointer to the message. */ size_t msgSize, /*!< [in] Pointer to the message size in bytes. Must be less than (CRYS_HASH_UPDATE_DATA_MAX_SIZE_IN_BYTES - 2*(EC_EDW modulus size)). */ CRYS_ECEDW_TempBuff_t *pTempBuff /*!< [in] Pointer to the temp buffer, for internal use. */); /******************************************************************************/ /*! @brief The function randomly generates Ec ed25519 private and public keys using given seed. The generation is performed using EC Edwards ed25519 algorithm. @return CRYS_OK on success, @return A non-zero value on failure as defined crys_ec_mont_edw_error.h or crys_hash_error.h. */ CIMPORT_C CRYSError_t CRYS_ECEDW_SeedKeyPair ( const uint8_t *pSeed, /*!< [in] Pointer to the given seed. */ size_t seedSize, /*!< [in] Size of the seed in bytes, must be equal the EC order size in bytes. */ uint8_t *pSecrKey, /*!< [out] Pointer to the secret key, including the seed, concatenated with the public key. */ size_t *pSecrKeySize, /*!< [in/out] Pointer to the size of the secret key buffer in bytes (must be at least 2*EC order size). */ uint8_t *pPublKey, /*!< [out] Pointer to the public key. */ size_t *pPublKeySize, /*!< [in/out] Pointer to the size of the public key in bytes. In - the size of buffer must be at least EC modulus size; Out - the actual size. */ CRYS_ECEDW_TempBuff_t *pTempBuff /*!< [in] Pointer to the temp buffer, for internal use. */); /*******************************************************************/ /*! @brief The function randomly generates the EC Edwards ed25519 private and public keys. The generation is performed using EC Edwards ed25519 algorithm. @return CRYS_OK on success, @return A non-zero value on failure as defined crys_ec_mont_edw_error.h, crys_hash_error.h or crys_rnd_error. */ CIMPORT_C CRYSError_t CRYS_ECEDW_KeyPair ( uint8_t *pSecrKey, /*!< [out] Pointer to the secret key (including seed and public key). */ size_t *pSecrKeySize, /*!< [in/out] Pointer to the size of the secret key in bytes, (must be at least 2*EC order size). */ uint8_t *pPublKey, /*!< [out] Pointer to the public key. */ size_t *pPublKeySize, /*!< [in/out] - Pointer to the size of the public key in bytes. In - the size of buffer must be at least EC modulus size; Out - the actual size. */ void *pRndState, /*!< [in/out] Pointer to the RND state structure. */ SaSiRndGenerateVectWorkFunc_t rndGenerateVectFunc, /*!< [in] Pointer to the random vector generation function. */ CRYS_ECEDW_TempBuff_t *pTempBuff /*!< [in] Pointer to the temp buffer. */); #ifdef __cplusplus } #endif /** @} */ #endif