Diff: cyassl/ctaocrypt/ecc.h

Revision:

0:1239e9b70ca2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/cyassl/ctaocrypt/ecc.h	Sat Jul 12 07:18:23 2014 +0000
@@ -0,0 +1,183 @@
+/* ecc.h
+ *
+ * Copyright (C) 2006-2014 wolfSSL Inc.
+ *
+ * This file is part of CyaSSL.
+ *
+ * CyaSSL 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.
+ *
+ * CyaSSL 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 02110-1301, USA
+ */
+
+#ifdef HAVE_ECC
+
+#ifndef CTAO_CRYPT_ECC_H
+#define CTAO_CRYPT_ECC_H
+
+#include <cyassl/ctaocrypt/types.h>
+#include <cyassl/ctaocrypt/integer.h>
+#include <cyassl/ctaocrypt/random.h>
+
+#ifdef __cplusplus
+    extern "C" {
+#endif
+
+
+enum {
+    ECC_PUBLICKEY  = 1,
+    ECC_PRIVATEKEY = 2,
+    ECC_MAXNAME    = 16,     /* MAX CURVE NAME LENGTH */
+    SIG_HEADER_SZ  =  6,     /* ECC signature header size */
+    ECC_BUFSIZE    = 256,    /* for exported keys temp buffer */
+    ECC_MINSIZE    = 20,     /* MIN Private Key size */
+    ECC_MAXSIZE    = 66      /* MAX Private Key size */
+};
+
+
+/* ECC set type defined a NIST GF(p) curve */
+typedef struct {
+    int size;       /* The size of the curve in octets */
+    const char* name;     /* name of this curve */
+    const char* prime;    /* prime that defines the field, curve is in (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) */
+} ecc_set_type;
+
+
+/* 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 {
+    mp_int x;        /* The x coordinate */
+    mp_int y;        /* The y coordinate */
+    mp_int z;        /* The z coordinate */
+} ecc_point;
+
+
+/* An ECC Key */
+typedef struct {
+    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 */
+    const ecc_set_type* dp;     /* domain parameters, either points to NIST
+                                   curves (idx >= 0) or user supplied */
+    ecc_point pubkey;   /* public key */  
+    mp_int    k;        /* private key */
+} ecc_key;
+
+
+/* ECC predefined curve sets  */
+extern const ecc_set_type ecc_sets[];
+
+
+CYASSL_API
+int ecc_make_key(RNG* rng, int keysize, ecc_key* key);
+CYASSL_API
+int ecc_shared_secret(ecc_key* private_key, ecc_key* public_key, byte* out,
+                      word32* outlen);
+CYASSL_API
+int ecc_sign_hash(const byte* in, word32 inlen, byte* out, word32 *outlen, 
+                  RNG* rng, ecc_key* key);
+CYASSL_API
+int ecc_verify_hash(const byte* sig, word32 siglen, const byte* hash,
+                    word32 hashlen, int* stat, ecc_key* key);
+CYASSL_API
+void ecc_init(ecc_key* key);
+CYASSL_API
+void ecc_free(ecc_key* key);
+CYASSL_API
+void ecc_fp_free(void);
+
+
+/* ASN key helpers */
+CYASSL_API
+int ecc_export_x963(ecc_key*, byte* out, word32* outLen);
+CYASSL_API
+int ecc_import_x963(const byte* in, word32 inLen, ecc_key* key);
+CYASSL_API
+int ecc_import_private_key(const byte* priv, word32 privSz, const byte* pub,
+                           word32 pubSz, ecc_key* key);
+CYASSL_API
+int ecc_export_private_only(ecc_key* key, byte* out, word32* outLen);
+
+/* size helper */
+CYASSL_API
+int ecc_size(ecc_key* key);
+CYASSL_API
+int ecc_sig_size(ecc_key* key);
+
+
+#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,
+    EXCHANGE_SALT_SZ = 16,  
+    EXCHANGE_INFO_SZ = 23  
+};
+
+enum ecFlags {
+    REQ_RESP_CLIENT = 1,
+    REQ_RESP_SERVER = 2
+};
+
+
+typedef struct ecEncCtx ecEncCtx;
+
+CYASSL_API
+ecEncCtx* ecc_ctx_new(int flags, RNG* rng);
+CYASSL_API
+void ecc_ctx_free(ecEncCtx*);
+CYASSL_API
+int ecc_ctx_reset(ecEncCtx*, RNG*);   /* reset for use again w/o alloc/free */
+
+CYASSL_API
+const byte* ecc_ctx_get_own_salt(ecEncCtx*);
+CYASSL_API
+int ecc_ctx_set_peer_salt(ecEncCtx*, const byte* salt);
+
+CYASSL_API
+int ecc_encrypt(ecc_key* privKey, ecc_key* pubKey, const byte* msg,
+                word32 msgSz, byte* out, word32* outSz, ecEncCtx* ctx);
+CYASSL_API
+int ecc_decrypt(ecc_key* privKey, ecc_key* pubKey, const byte* msg,
+                word32 msgSz, byte* out, word32* outSz, ecEncCtx* ctx);
+
+#endif /* HAVE_ECC_ENCRYPT */
+
+#ifdef __cplusplus
+    }    /* extern "C" */    
+#endif
+
+#endif /* CTAO_CRYPT_ECC_H */
+#endif /* HAVE_ECC */
+