/* ecc.h * * Copyright (C) 2006-2019 wolfSSL Inc. * * This file is part of wolfSSL. * * wolfSSL is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * wolfSSL is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA */ /*! \file wolfssl/wolfcrypt/ecc.h */ #ifndef WOLF_CRYPT_ECC_H #define WOLF_CRYPT_ECC_H #include #ifdef HAVE_ECC #if defined(HAVE_FIPS) && \ defined(HAVE_FIPS_VERSION) && (HAVE_FIPS_VERSION >= 2) #include #endif /* HAVE_FIPS_VERSION >= 2 */ #include #include #ifdef HAVE_X963_KDF #include #endif #ifdef WOLFSSL_ASYNC_CRYPT #include #ifdef WOLFSSL_CERT_GEN #include #endif #endif #ifdef WOLFSSL_ATECC508A #include #endif /* WOLFSSL_ATECC508A */ #if defined(WOLFSSL_CRYPTOCELL) #include #endif #ifdef __cplusplus extern "C" { #endif /* Enable curve B parameter if needed */ #if defined(HAVE_COMP_KEY) || defined(ECC_CACHE_CURVE) #ifndef USE_ECC_B_PARAM /* Allow someone to force enable */ #define USE_ECC_B_PARAM #endif #endif /* Use this as the key->idx if a custom ecc_set is used for key->dp */ #define ECC_CUSTOM_IDX (-1) /* Determine max ECC bits based on enabled curves */ #if defined(HAVE_ECC521) || defined(HAVE_ALL_CURVES) #define MAX_ECC_BITS 521 #elif defined(HAVE_ECC512) #define MAX_ECC_BITS 512 #elif defined(HAVE_ECC384) #define MAX_ECC_BITS 384 #elif defined(HAVE_ECC320) #define MAX_ECC_BITS 320 #elif !defined(NO_ECC256) #define MAX_ECC_BITS 256 #elif defined(HAVE_ECC239) #define MAX_ECC_BITS 239 #elif defined(HAVE_ECC224) #define MAX_ECC_BITS 224 #elif defined(HAVE_ECC192) #define MAX_ECC_BITS 192 #elif defined(HAVE_ECC160) #define MAX_ECC_BITS 160 #elif defined(HAVE_ECC128) #define MAX_ECC_BITS 128 #elif defined(HAVE_ECC112) #define MAX_ECC_BITS 112 #endif /* calculate max ECC bytes */ #if ((MAX_ECC_BITS * 2) % 8) == 0 #define MAX_ECC_BYTES (MAX_ECC_BITS / 8) #else /* add byte if not aligned */ #define MAX_ECC_BYTES ((MAX_ECC_BITS / 8) + 1) #endif #ifndef ECC_MAX_PAD_SZ /* ECC maximum padding size (when MSB is set extra byte required for R and S) */ #define ECC_MAX_PAD_SZ 2 #endif enum { ECC_PUBLICKEY = 1, ECC_PRIVATEKEY = 2, ECC_PRIVATEKEY_ONLY = 3, ECC_MAXNAME = 16, /* MAX CURVE NAME LENGTH */ SIG_HEADER_SZ = 7, /* ECC signature header size (30 81 87 02 42 [R] 02 42 [S]) */ ECC_BUFSIZE = 256, /* for exported keys temp buffer */ ECC_MINSIZE = 20, /* MIN Private Key size */ ECC_MAXSIZE = 66, /* MAX Private Key size */ ECC_MAXSIZE_GEN = 74, /* MAX Buffer size required when generating ECC keys*/ ECC_MAX_OID_LEN = 16, ECC_MAX_SIG_SIZE= ((MAX_ECC_BYTES * 2) + ECC_MAX_PAD_SZ + SIG_HEADER_SZ), /* max crypto hardware size */ #ifdef WOLFSSL_ATECC508A ECC_MAX_CRYPTO_HW_SIZE = ATECC_KEY_SIZE, /* from port/atmel/atmel.h */ ECC_MAX_CRYPTO_HW_PUBKEY_SIZE = (ATECC_KEY_SIZE*2), #elif defined(PLUTON_CRYPTO_ECC) ECC_MAX_CRYPTO_HW_SIZE = 32, #elif defined(WOLFSSL_CRYPTOCELL) #ifndef CRYPTOCELL_KEY_SIZE CRYPTOCELL_KEY_SIZE = ECC_MAXSIZE, #endif ECC_MAX_CRYPTO_HW_SIZE = CRYPTOCELL_KEY_SIZE, #endif /* point compression type */ ECC_POINT_COMP_EVEN = 0x02, ECC_POINT_COMP_ODD = 0x03, ECC_POINT_UNCOMP = 0x04, /* Shamir's dual add constants */ SHAMIR_PRECOMP_SZ = 16, #ifdef HAVE_PKCS11 ECC_MAX_ID_LEN = 32, #endif }; /* Curve Types */ typedef enum ecc_curve_id { ECC_CURVE_INVALID = -1, ECC_CURVE_DEF = 0, /* NIST or SECP */ /* NIST Prime Curves */ ECC_SECP192R1, ECC_PRIME192V2, ECC_PRIME192V3, ECC_PRIME239V1, ECC_PRIME239V2, ECC_PRIME239V3, ECC_SECP256R1, /* SECP Curves */ ECC_SECP112R1, ECC_SECP112R2, ECC_SECP128R1, ECC_SECP128R2, ECC_SECP160R1, ECC_SECP160R2, ECC_SECP224R1, ECC_SECP384R1, ECC_SECP521R1, /* Koblitz */ ECC_SECP160K1, ECC_SECP192K1, ECC_SECP224K1, ECC_SECP256K1, /* Brainpool Curves */ ECC_BRAINPOOLP160R1, ECC_BRAINPOOLP192R1, ECC_BRAINPOOLP224R1, ECC_BRAINPOOLP256R1, ECC_BRAINPOOLP320R1, ECC_BRAINPOOLP384R1, ECC_BRAINPOOLP512R1, /* Twisted Edwards Curves */ #ifdef HAVE_CURVE25519 ECC_X25519, #endif #ifdef HAVE_X448 ECC_X448, #endif #ifdef WOLFSSL_CUSTOM_CURVES ECC_CURVE_CUSTOM, #endif } ecc_curve_id; #ifdef HAVE_OID_ENCODING typedef word16 ecc_oid_t; #else typedef byte ecc_oid_t; /* OID encoded with ASN scheme: first element = (oid[0] * 40) + oid[1] if any element > 127 then MSB 0x80 indicates additional byte */ #endif /* ECC set type defined a GF(p) curve */ #ifndef USE_WINDOWS_API typedef struct ecc_set_type { int size; /* The size of the curve in octets */ int id; /* id of this curve */ const char* name; /* name of this curve */ const char* prime; /* prime that defines the field, curve is in (hex) */ const char* Af; /* fields A param (hex) */ const char* Bf; /* fields B param (hex) */ const char* order; /* order of the curve (hex) */ const char* Gx; /* x coordinate of the base point on curve (hex) */ const char* Gy; /* y coordinate of the base point on curve (hex) */ const ecc_oid_t* oid; word32 oidSz; word32 oidSum; /* sum of encoded OID bytes */ int cofactor; } ecc_set_type; #else /* MSC does something different with the pointers to the arrays than GCC, * and it causes the FIPS checksum to fail. In the case of windows builds, * store everything as arrays instead of pointers to strings. */ #define MAX_ECC_NAME 16 #define MAX_ECC_STRING ((MAX_ECC_BYTES * 2) + 1) /* The values are stored as text strings. */ typedef struct ecc_set_type { int size; /* The size of the curve in octets */ int id; /* id of this curve */ const char name[MAX_ECC_NAME]; /* name of this curve */ const char prime[MAX_ECC_STRING]; /* prime that defines the field, curve is in (hex) */ const char Af[MAX_ECC_STRING]; /* fields A param (hex) */ const char Bf[MAX_ECC_STRING]; /* fields B param (hex) */ const char order[MAX_ECC_STRING]; /* order of the curve (hex) */ const char Gx[MAX_ECC_STRING]; /* x coordinate of the base point on curve (hex) */ const char Gy[MAX_ECC_STRING]; /* y coordinate of the base point on curve (hex) */ const ecc_oid_t oid[10]; word32 oidSz; word32 oidSum; /* sum of encoded OID bytes */ int cofactor; } ecc_set_type; #endif #ifdef ALT_ECC_SIZE /* Note on ALT_ECC_SIZE: * The fast math code uses an array of a fixed size to store the big integers. * By default, the array is big enough for RSA keys. There is a size, * FP_MAX_BITS which can be used to make the array smaller when one wants ECC * but not RSA. Some people want fast math sized for both RSA and ECC, where * ECC won't use as much as RSA. The flag ALT_ECC_SIZE switches in an alternate * ecc_point structure that uses an alternate fp_int that has a shorter array * of fp_digits. * * Now, without ALT_ECC_SIZE, the ecc_point has three single item arrays of * mp_ints for the components of the point. With ALT_ECC_SIZE, the components * of the point are pointers that are set to each of a three item array of * alt_fp_ints. While an mp_int will have 4096 bits of digit inside the * structure, the alt_fp_int will only have 528 bits. A size value was added * in the ALT case, as well, and is set by mp_init() and alt_fp_init(). The * functions fp_zero() and fp_copy() use the size parameter. An int needs to * be initialized before using it instead of just fp_zeroing it, the init will * call zero. FP_MAX_BITS_ECC defaults to 528, but can be set to change the * number of bits used in the alternate FP_INT. * * Do not enable ALT_ECC_SIZE and disable fast math in the configuration. */ #ifndef USE_FAST_MATH #error USE_FAST_MATH must be defined to use ALT_ECC_SIZE #endif /* determine max bits required for ECC math */ #ifndef FP_MAX_BITS_ECC /* check alignment */ #if ((MAX_ECC_BITS * 2) % DIGIT_BIT) == 0 /* max bits is double */ #define FP_MAX_BITS_ECC (MAX_ECC_BITS * 2) #else /* max bits is doubled, plus one digit of fudge */ #define FP_MAX_BITS_ECC ((MAX_ECC_BITS * 2) + DIGIT_BIT) #endif #else /* verify alignment */ #if FP_MAX_BITS_ECC % CHAR_BIT #error FP_MAX_BITS_ECC must be a multiple of CHAR_BIT #endif #endif /* determine buffer size */ #define FP_SIZE_ECC (FP_MAX_BITS_ECC/DIGIT_BIT) /* This needs to match the size of the fp_int struct, except the * fp_digit array will be shorter. */ typedef struct alt_fp_int { int used, sign, size; mp_digit dp[FP_SIZE_ECC]; } alt_fp_int; #endif /* ALT_ECC_SIZE */ #ifndef WC_ECCKEY_TYPE_DEFINED typedef struct ecc_key ecc_key; #define WC_ECCKEY_TYPE_DEFINED #endif /* A point on an ECC curve, stored in Jacbobian format such that (x,y,z) => (x/z^2, y/z^3, 1) when interpreted as affine */ typedef struct { #ifndef ALT_ECC_SIZE mp_int x[1]; /* The x coordinate */ mp_int y[1]; /* The y coordinate */ mp_int z[1]; /* The z coordinate */ #else mp_int* x; /* The x coordinate */ mp_int* y; /* The y coordinate */ mp_int* z; /* The z coordinate */ alt_fp_int xyz[3]; #endif #ifdef WOLFSSL_SMALL_STACK_CACHE ecc_key* key; #endif } ecc_point; /* ECC Flags */ enum { WC_ECC_FLAG_NONE = 0x00, #ifdef HAVE_ECC_CDH WC_ECC_FLAG_COFACTOR = 0x01, #endif }; /* An ECC Key */ struct ecc_key { int type; /* Public or Private */ int idx; /* Index into the ecc_sets[] for the parameters of this curve if -1, this key is using user supplied curve in dp */ int state; word32 flags; const ecc_set_type* dp; /* domain parameters, either points to NIST curves (idx >= 0) or user supplied */ #ifdef WOLFSSL_CUSTOM_CURVES int deallocSet; #endif void* heap; /* heap hint */ ecc_point pubkey; /* public key */ mp_int k; /* private key */ #ifdef WOLFSSL_ATECC508A int slot; /* Key Slot Number (-1 unknown) */ byte pubkey_raw[ECC_MAX_CRYPTO_HW_PUBKEY_SIZE]; #endif #if defined(PLUTON_CRYPTO_ECC) || defined(WOLF_CRYPTO_CB) int devId; #endif #ifdef WOLFSSL_ASYNC_CRYPT mp_int* r; /* sign/verify temps */ mp_int* s; WC_ASYNC_DEV asyncDev; #ifdef HAVE_CAVIUM_V mp_int* e; /* Sign, Verify and Shared Secret */ mp_int* signK; #endif #ifdef WOLFSSL_CERT_GEN CertSignCtx certSignCtx; /* context info for cert sign (MakeSignature) */ #endif #endif /* WOLFSSL_ASYNC_CRYPT */ #ifdef HAVE_PKCS11 byte id[ECC_MAX_ID_LEN]; int idLen; #endif #if defined(WOLFSSL_CRYPTOCELL) ecc_context_t ctx; #endif #ifdef WOLFSSL_ECDSA_SET_K mp_int *sign_k; #endif #ifdef WOLFSSL_SMALL_STACK_CACHE mp_int* t1; mp_int* t2; #ifdef ALT_ECC_SIZE mp_int* x; mp_int* y; mp_int* z; #endif #endif }; WOLFSSL_ABI WOLFSSL_API ecc_key* wc_ecc_key_new(void*); WOLFSSL_ABI WOLFSSL_API void wc_ecc_key_free(ecc_key*); /* ECC predefined curve sets */ extern const ecc_set_type ecc_sets[]; WOLFSSL_API const char* wc_ecc_get_name(int curve_id); #ifndef WOLFSSL_ATECC508A #ifdef WOLFSSL_PUBLIC_ECC_ADD_DBL #define ECC_API WOLFSSL_API #else #define ECC_API WOLFSSL_LOCAL #endif ECC_API int ecc_mul2add(ecc_point* A, mp_int* kA, ecc_point* B, mp_int* kB, ecc_point* C, mp_int* a, mp_int* modulus, void* heap); ECC_API int ecc_map(ecc_point*, mp_int*, mp_digit); ECC_API int ecc_projective_add_point(ecc_point* P, ecc_point* Q, ecc_point* R, mp_int* a, mp_int* modulus, mp_digit mp); ECC_API int ecc_projective_dbl_point(ecc_point* P, ecc_point* R, mp_int* a, mp_int* modulus, mp_digit mp); #endif WOLFSSL_API int wc_ecc_make_key(WC_RNG* rng, int keysize, ecc_key* key); WOLFSSL_ABI WOLFSSL_API int wc_ecc_make_key_ex(WC_RNG* rng, int keysize, ecc_key* key, int curve_id); WOLFSSL_API int wc_ecc_make_pub(ecc_key* key, ecc_point* pubOut); WOLFSSL_API int wc_ecc_check_key(ecc_key* key); WOLFSSL_API int wc_ecc_is_point(ecc_point* ecp, mp_int* a, mp_int* b, mp_int* prime); #ifdef HAVE_ECC_DHE WOLFSSL_API int wc_ecc_shared_secret(ecc_key* private_key, ecc_key* public_key, byte* out, word32* outlen); WOLFSSL_LOCAL int wc_ecc_shared_secret_gen(ecc_key* private_key, ecc_point* point, byte* out, word32 *outlen); WOLFSSL_API int wc_ecc_shared_secret_ex(ecc_key* private_key, ecc_point* point, byte* out, word32 *outlen); #if defined(WOLFSSL_ATECC508A) || defined(PLUTON_CRYPTO_ECC) || defined(WOLFSSL_CRYPTOCELL) #define wc_ecc_shared_secret_ssh wc_ecc_shared_secret #else #define wc_ecc_shared_secret_ssh wc_ecc_shared_secret_ex /* For backwards compat */ #endif #endif /* HAVE_ECC_DHE */ #ifdef HAVE_ECC_SIGN WOLFSSL_ABI WOLFSSL_API int wc_ecc_sign_hash(const byte* in, word32 inlen, byte* out, word32 *outlen, WC_RNG* rng, ecc_key* key); WOLFSSL_API int wc_ecc_sign_hash_ex(const byte* in, word32 inlen, WC_RNG* rng, ecc_key* key, mp_int *r, mp_int *s); #ifdef WOLFSSL_ECDSA_SET_K WOLFSSL_API int wc_ecc_sign_set_k(const byte* k, word32 klen, ecc_key* key); #endif #endif /* HAVE_ECC_SIGN */ #ifdef HAVE_ECC_VERIFY WOLFSSL_API int wc_ecc_verify_hash(const byte* sig, word32 siglen, const byte* hash, word32 hashlen, int* stat, ecc_key* key); WOLFSSL_API int wc_ecc_verify_hash_ex(mp_int *r, mp_int *s, const byte* hash, word32 hashlen, int* stat, ecc_key* key); #endif /* HAVE_ECC_VERIFY */ WOLFSSL_API int wc_ecc_init(ecc_key* key); WOLFSSL_ABI WOLFSSL_API int wc_ecc_init_ex(ecc_key* key, void* heap, int devId); #ifdef HAVE_PKCS11 WOLFSSL_API int wc_ecc_init_id(ecc_key* key, unsigned char* id, int len, void* heap, int devId); #endif #ifdef WOLFSSL_CUSTOM_CURVES WOLFSSL_LOCAL void wc_ecc_free_curve(const ecc_set_type* curve, void* heap); #endif WOLFSSL_ABI WOLFSSL_API int wc_ecc_free(ecc_key* key); WOLFSSL_API int wc_ecc_set_flags(ecc_key* key, word32 flags); WOLFSSL_API void wc_ecc_fp_free(void); WOLFSSL_API int wc_ecc_set_curve(ecc_key* key, int keysize, int curve_id); WOLFSSL_API int wc_ecc_is_valid_idx(int n); WOLFSSL_API int wc_ecc_get_curve_idx(int curve_id); WOLFSSL_API int wc_ecc_get_curve_id(int curve_idx); #define wc_ecc_get_curve_name_from_id wc_ecc_get_name WOLFSSL_API int wc_ecc_get_curve_size_from_id(int curve_id); WOLFSSL_API int wc_ecc_get_curve_idx_from_name(const char* curveName); WOLFSSL_API int wc_ecc_get_curve_size_from_name(const char* curveName); WOLFSSL_API int wc_ecc_get_curve_id_from_name(const char* curveName); WOLFSSL_API int wc_ecc_get_curve_id_from_params(int fieldSize, const byte* prime, word32 primeSz, const byte* Af, word32 AfSz, const byte* Bf, word32 BfSz, const byte* order, word32 orderSz, const byte* Gx, word32 GxSz, const byte* Gy, word32 GySz, int cofactor); WOLFSSL_API int wc_ecc_get_curve_id_from_dp_params(const ecc_set_type* dp); WOLFSSL_API int wc_ecc_get_curve_id_from_oid(const byte* oid, word32 len); WOLFSSL_API const ecc_set_type* wc_ecc_get_curve_params(int curve_idx); WOLFSSL_API ecc_point* wc_ecc_new_point(void); WOLFSSL_API ecc_point* wc_ecc_new_point_h(void* h); WOLFSSL_API void wc_ecc_del_point(ecc_point* p); WOLFSSL_API void wc_ecc_del_point_h(ecc_point* p, void* h); WOLFSSL_API int wc_ecc_copy_point(ecc_point* p, ecc_point *r); WOLFSSL_API int wc_ecc_cmp_point(ecc_point* a, ecc_point *b); WOLFSSL_API int wc_ecc_point_is_at_infinity(ecc_point *p); #ifndef WOLFSSL_ATECC508A WOLFSSL_API int wc_ecc_mulmod(mp_int* k, ecc_point *G, ecc_point *R, mp_int* a, mp_int* modulus, int map); WOLFSSL_LOCAL int wc_ecc_mulmod_ex(mp_int* k, ecc_point *G, ecc_point *R, mp_int* a, mp_int* modulus, int map, void* heap); #endif /* !WOLFSSL_ATECC508A */ #ifdef HAVE_ECC_KEY_EXPORT /* ASN key helpers */ WOLFSSL_API int wc_ecc_export_x963(ecc_key*, byte* out, word32* outLen); WOLFSSL_API int wc_ecc_export_x963_ex(ecc_key*, byte* out, word32* outLen, int compressed); /* extended functionality with compressed option */ #endif /* HAVE_ECC_KEY_EXPORT */ #ifdef HAVE_ECC_KEY_IMPORT WOLFSSL_API int wc_ecc_import_x963(const byte* in, word32 inLen, ecc_key* key); WOLFSSL_API int wc_ecc_import_x963_ex(const byte* in, word32 inLen, ecc_key* key, int curve_id); WOLFSSL_API int wc_ecc_import_private_key(const byte* priv, word32 privSz, const byte* pub, word32 pubSz, ecc_key* key); WOLFSSL_API int wc_ecc_import_private_key_ex(const byte* priv, word32 privSz, const byte* pub, word32 pubSz, ecc_key* key, int curve_id); WOLFSSL_API int wc_ecc_rs_to_sig(const char* r, const char* s, byte* out, word32* outlen); WOLFSSL_API int wc_ecc_rs_raw_to_sig(const byte* r, word32 rSz, const byte* s, word32 sSz, byte* out, word32* outlen); WOLFSSL_API int wc_ecc_sig_to_rs(const byte* sig, word32 sigLen, byte* r, word32* rLen, byte* s, word32* sLen); WOLFSSL_API int wc_ecc_import_raw(ecc_key* key, const char* qx, const char* qy, const char* d, const char* curveName); WOLFSSL_API int wc_ecc_import_raw_ex(ecc_key* key, const char* qx, const char* qy, const char* d, int curve_id); WOLFSSL_API int wc_ecc_import_unsigned(ecc_key* key, byte* qx, byte* qy, byte* d, int curve_id); #endif /* HAVE_ECC_KEY_IMPORT */ #ifdef HAVE_ECC_KEY_EXPORT WOLFSSL_API int wc_ecc_export_ex(ecc_key* key, byte* qx, word32* qxLen, byte* qy, word32* qyLen, byte* d, word32* dLen, int encType); WOLFSSL_API int wc_ecc_export_private_only(ecc_key* key, byte* out, word32* outLen); WOLFSSL_API int wc_ecc_export_public_raw(ecc_key* key, byte* qx, word32* qxLen, byte* qy, word32* qyLen); WOLFSSL_API int wc_ecc_export_private_raw(ecc_key* key, byte* qx, word32* qxLen, byte* qy, word32* qyLen, byte* d, word32* dLen); #endif /* HAVE_ECC_KEY_EXPORT */ #ifdef HAVE_ECC_KEY_EXPORT WOLFSSL_API int wc_ecc_export_point_der(const int curve_idx, ecc_point* point, byte* out, word32* outLen); #endif /* HAVE_ECC_KEY_EXPORT */ #ifdef HAVE_ECC_KEY_IMPORT WOLFSSL_API int wc_ecc_import_point_der(byte* in, word32 inLen, const int curve_idx, ecc_point* point); #endif /* HAVE_ECC_KEY_IMPORT */ /* size helper */ WOLFSSL_API int wc_ecc_size(ecc_key* key); WOLFSSL_API int wc_ecc_sig_size_calc(int sz); WOLFSSL_API int wc_ecc_sig_size(ecc_key* key); WOLFSSL_API int wc_ecc_get_oid(word32 oidSum, const byte** oid, word32* oidSz); #ifdef WOLFSSL_CUSTOM_CURVES WOLFSSL_API int wc_ecc_set_custom_curve(ecc_key* key, const ecc_set_type* dp); #endif #ifdef HAVE_ECC_ENCRYPT /* ecc encrypt */ enum ecEncAlgo { ecAES_128_CBC = 1, /* default */ ecAES_256_CBC = 2 }; enum ecKdfAlgo { ecHKDF_SHA256 = 1, /* default */ ecHKDF_SHA1 = 2 }; enum ecMacAlgo { ecHMAC_SHA256 = 1, /* default */ ecHMAC_SHA1 = 2 }; enum { KEY_SIZE_128 = 16, KEY_SIZE_256 = 32, IV_SIZE_64 = 8, IV_SIZE_128 = 16, EXCHANGE_SALT_SZ = 16, EXCHANGE_INFO_SZ = 23 }; enum ecFlags { REQ_RESP_CLIENT = 1, REQ_RESP_SERVER = 2 }; typedef struct ecEncCtx ecEncCtx; WOLFSSL_API ecEncCtx* wc_ecc_ctx_new(int flags, WC_RNG* rng); WOLFSSL_API ecEncCtx* wc_ecc_ctx_new_ex(int flags, WC_RNG* rng, void* heap); WOLFSSL_API void wc_ecc_ctx_free(ecEncCtx*); WOLFSSL_API int wc_ecc_ctx_reset(ecEncCtx*, WC_RNG*); /* reset for use again w/o alloc/free */ WOLFSSL_API const byte* wc_ecc_ctx_get_own_salt(ecEncCtx*); WOLFSSL_API int wc_ecc_ctx_set_peer_salt(ecEncCtx*, const byte* salt); WOLFSSL_API int wc_ecc_ctx_set_info(ecEncCtx*, const byte* info, int sz); WOLFSSL_API int wc_ecc_encrypt(ecc_key* privKey, ecc_key* pubKey, const byte* msg, word32 msgSz, byte* out, word32* outSz, ecEncCtx* ctx); WOLFSSL_API int wc_ecc_decrypt(ecc_key* privKey, ecc_key* pubKey, const byte* msg, word32 msgSz, byte* out, word32* outSz, ecEncCtx* ctx); #endif /* HAVE_ECC_ENCRYPT */ #ifdef HAVE_X963_KDF WOLFSSL_API int wc_X963_KDF(enum wc_HashType type, const byte* secret, word32 secretSz, const byte* sinfo, word32 sinfoSz, byte* out, word32 outSz); #endif #ifdef ECC_CACHE_CURVE WOLFSSL_API int wc_ecc_curve_cache_init(void); WOLFSSL_API void wc_ecc_curve_cache_free(void); #endif WOLFSSL_API int wc_ecc_gen_k(WC_RNG* rng, int size, mp_int* k, mp_int* order); #ifdef __cplusplus } /* extern "C" */ #endif #endif /* HAVE_ECC */ #endif /* WOLF_CRYPT_ECC_H */