Diff: crypto/crypto_ecc.c

Revision:

0:35aa5be3b78d

diff -r 000000000000 -r 35aa5be3b78d crypto/crypto_ecc.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/crypto/crypto_ecc.c	Fri Jun 06 10:49:02 2014 +0000
@@ -0,0 +1,618 @@
+/*
+MuTLS - A super trimmed down TLS/SSL Library for embedded devices
+Author: Donatien Garnier
+Copyright (C) 2013-2014 AppNearMe Ltd
+
+This program 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.
+
+This program 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.
+*//**
+ * \file crypto_ecc.c
+ * \copyright Copyright (c) AppNearMe Ltd 2013
+ * \author Donatien Garnier
+ */
+
+#define __DEBUG__ 0//4
+#ifndef __MODULE__
+#define __MODULE__ "crypto_ecc.c"
+#endif
+
+#include "core/fwk.h"
+#include "crypto_ecc.h"
+#include "inc/mutls_errors.h"
+#include "inc/mutls_config.h"
+
+#include "crypto_math.h"
+#include "ltc/ltc.h"
+
+static mutls_err_t crypto_ecc_dsa_check_get_asn1_rs(void* r, void* s, const uint8_t* signature, size_t signature_size);
+
+static const crypto_ecc_curve_t crypto_ecc_curves[];
+
+mutls_err_t crypto_ecc_curve_get(const crypto_ecc_curve_t** curve, crypto_ecc_curve_type_t type)
+{
+ /*
+GNUTLS supports:
+SECP192R1 = ECC-192 in libtomcrypt
+SECP224R1 = ECC-224 in libtomcrypt
+SECP256R1 = ECC-256 in libtomcrypt
+SECP384R1 = ECC-384 in libtomcrypt
+SECP521R1 = ECC-521 in libtomcrypt
+
+So let's support the same ones!
+ */
+
+  int i = 0;
+  while(true)
+  {
+    const crypto_ecc_curve_t* current_curve = &crypto_ecc_curves[i];
+    if(current_curve->size == 0)
+    {
+      return MUTLS_ERR_NOT_IMPLEMENTED;
+    }
+    if(current_curve->type == type)
+    {
+      *curve = current_curve;
+      break;
+    }
+  }
+  return MUTLS_OK;
+}
+
+mutls_err_t crypto_ecc_ansi_x963_import(crypto_ecc_public_key_t* key, const crypto_ecc_curve_t* curve, const uint8_t* x963, size_t size)
+{
+  int err;
+
+  /* must be odd */
+  if ((size & 1) == 0) {
+     return MUTLS_ERR_PARAMETERS;
+  }
+
+  /* init key */
+  if (mp_init_multi(&key->pubkey.x, &key->pubkey.y, &key->pubkey.z, NULL) != MUTLS_OK) {
+     return MUTLS_ERR_MEMORY;
+  }
+
+  /* check for 4, 6 or 7 */
+  if (x963[0] != 4 && x963[0] != 6 && x963[0] != 7) {
+     err = MUTLS_ERR_PARAMETERS;
+     goto error;
+  }
+
+  /* read data */
+  mp_read_unsigned_bin(&key->pubkey.x, (unsigned char *)x963+1, (size-1)>>1);
+
+  mp_read_unsigned_bin(&key->pubkey.y, (unsigned char *)x963+1+((size-1)>>1), (size-1)>>1);
+
+  mp_set(&key->pubkey.z, 1);
+
+  if (((size-1)>>1) != (unsigned long) curve->size) {
+    err = MUTLS_ERR_PARAMETERS;
+    goto error;
+  }
+
+  key->curve = curve;
+
+  /* we're done */
+  return MUTLS_OK;
+error:
+  mp_clear_multi(&key->pubkey.x, &key->pubkey.y, &key->pubkey.z, NULL);
+  return err;
+}
+
+mutls_err_t crypto_ecc_ansi_x963_export(const crypto_ecc_public_key_t* key, uint8_t* x963, size_t max_size, size_t* size)
+{
+
+  unsigned char buf[ECC_BUF_SIZE];
+  unsigned long numlen;
+
+  numlen = crypto_ecc_get_key_size_for_curve(key->curve);
+
+  if (max_size < (1 + 2*numlen)) {
+     *size = 1 + 2*numlen;
+     return MUTLS_ERR_BUFFER_TOO_SMALL;
+  }
+
+  /* store byte 0x04 */
+  x963[0] = 0x04;
+
+  /* pad and store x */
+  zeromem(buf, sizeof(buf));
+  mp_to_unsigned_bin(&key->pubkey.x, buf + (numlen - mp_unsigned_bin_size(&key->pubkey.x)));
+  memcpy(x963+1, buf, numlen);
+
+  /* pad and store y */
+  zeromem(buf, sizeof(buf));
+  mp_to_unsigned_bin(&key->pubkey.y, buf + (numlen - mp_unsigned_bin_size(&key->pubkey.y)));
+  memcpy(x963+1+numlen, buf, numlen);
+
+  *size = 1 + 2*numlen;
+  return MUTLS_OK;
+}
+
+mutls_err_t crypto_ecc_generate_key(crypto_ecc_private_key_t* key, const crypto_ecc_curve_t* curve, crypto_prng_t* prng)
+{
+  ecc_point     base;
+  fp_int        prime, order;
+  int ret;
+
+  size_t keysize = crypto_ecc_get_key_size_for_curve(curve);
+
+  DBG("Generating key of size %d", keysize);
+
+  uint8_t buf[keysize];
+
+  /* make up random string */
+  DBG("Getting data from PRNG");
+  crypto_prng_get(prng, buf, keysize);
+#if 0
+  if( crypto_prng_get(prng, buf, keysize) != MUTLS_OK ) {
+     ret = MUTLS_ERR_PRNG;
+     goto errbuf;
+  }
+#endif
+
+  DBG("Initializing numbers");
+  /* setup the key variables */
+  if ((ret = mp_init_multi(&key->pub.pubkey.x, &key->pub.pubkey.y, &key->pub.pubkey.z, &key->privkey, &prime, &order, NULL)) != MUTLS_OK) {
+     goto errbuf;
+  }
+  if ((ret = mp_init_multi(&base.x, &base.y, &base.z, NULL)) != MUTLS_OK) {
+     ret = MUTLS_ERR_MEMORY;
+     goto errkey;
+  }
+
+  DBG("Reading the key specs");
+   /* read in the specs for this key */
+  if ((ret = mp_read_radix(&prime,   (char *)curve->prime, 16)) != MUTLS_OK)                  { goto errkey; }
+  if ((ret = mp_read_radix(&order,   (char *)curve->order, 16)) != MUTLS_OK)                  { goto errkey; }
+  if ((ret = mp_read_radix(&base.x, (char *)curve->Gx, 16)) != MUTLS_OK)                     { goto errkey; }
+  if ((ret = mp_read_radix(&base.y, (char *)curve->Gy, 16)) != MUTLS_OK)                     { goto errkey; }
+  /*if ((ret = */mp_set(&base.z, 1); /*) != MUTLS_OK)                                                  { goto errkey; }*/
+  /*if ((ret =*/ mp_read_unsigned_bin(&key->privkey, (unsigned char *)buf, keysize);/*) != MUTLS_OK)         { goto errkey; }*/
+
+  /* the key should be smaller than the order of base point */
+  if (mp_cmp(&key->privkey, &order) != MP_LT) {
+      if((ret = mp_mod(&key->privkey, &order, &key->privkey)) != MUTLS_OK)                                    { goto errkey; }
+  }
+
+  DBG("Compute public key");
+  /* make the public key */
+  if ((ret = ltc_ecc_mulmod(&key->privkey, &base, &key->pub.pubkey, &prime, 1)) != MUTLS_OK)              { goto errkey; }
+
+  //Save curve
+  key->pub.curve = curve;
+
+  DBG("Done");
+  /* free up ram */
+  ret = MUTLS_OK;
+  goto cleanup;
+errkey:
+   mp_clear_multi(&key->pub.pubkey.x, &key->pub.pubkey.y, &key->pub.pubkey.z, &key->privkey, NULL);
+cleanup:
+   mp_clear_multi(&base.x, &base.y, &base.z, &prime, &order, NULL);
+errbuf:
+#ifdef MUTLS_CLEAN_STACK
+   zeromem(buf, &key->pub.curve->size);
+#endif
+
+   return ret;
+}
+
+size_t crypto_ecc_get_key_size_for_curve(const crypto_ecc_curve_t* curve)
+{
+  switch(curve->type)
+   {
+   case secp192r1:
+     return 192 / 8;
+   case secp224r1:
+     return 224 / 8;
+   case secp256r1:
+     return 256 / 8;
+   case secp384r1:
+     return 384 / 8;
+   case secp521r1:
+     return 512 / 8;
+   default:
+     break;
+   }
+
+  return 0;
+}
+
+const crypto_ecc_public_key_t* crypto_ecc_get_public_key(const crypto_ecc_private_key_t* private_key)
+{
+  return &private_key->pub;
+}
+
+mutls_err_t crypto_ecc_dsa_check(const crypto_ecc_public_key_t* key, const uint8_t* hash, size_t hash_size, const uint8_t* signature, size_t signature_size)
+{
+  crypto_ecc_point_t    mG, mQ;
+  fp_int          r, s, v, w, u1, u2, e, p, m;
+  fp_digit        mp;
+  int           err;
+
+  bool valid = false;
+
+  /* default to invalid signature */
+  valid = false;
+
+
+  /* allocate ints */
+  if ((err = mp_init_multi(&r, &s, &v, &w, &u1, &u2, &p, &e, &m, NULL)) != MUTLS_OK) {
+     return MUTLS_ERR_MEMORY;
+  }
+
+  /* allocate points */
+  err = mp_init_multi(&mG.x, &mG.y, &mG.z, &mQ.x, &mQ.y, &mQ.z, NULL);
+  if (err) {
+     mp_clear_multi(&r, &s, &v, &w, &u1, &u2, &p, &e, &m, NULL);
+     return MUTLS_ERR_MEMORY;
+  }
+
+#if 0
+  /* parse header */
+  //TODO
+  if ((err = der_decode_sequence_multi(signature, signature_size,
+                                 LTC_ASN1_INTEGER, 1UL, &r,
+                                 LTC_ASN1_INTEGER, 1UL, &s,
+                                 LTC_ASN1_EOL, 0UL, NULL)) != MUTLS_OK) {
+     goto error;
+  }
+#endif
+
+  //Decode ASN.1 sequence: [INTEGER:&r, INTEGER:&s]
+  if( (err = crypto_ecc_dsa_check_get_asn1_rs(&r, &s, signature, signature_size) ) != MUTLS_OK )
+  {
+    goto error;
+  }
+
+  /* get the order */
+  if ((err = mp_read_radix(&p, (char *)key->curve->order, 16)) != MUTLS_OK)                                { goto error; }
+
+  /* get the modulus */
+  if ((err = mp_read_radix(&m, (char *)key->curve->prime, 16)) != MUTLS_OK)                                { goto error; }
+
+  /* check for zero */
+  if (mp_iszero(&r) || mp_iszero(&s) || mp_cmp(&r, &p) != MP_LT || mp_cmp(&s, &p) != MP_LT) {
+     err = MUTLS_ERR_PARAMETERS;
+     goto error;
+  }
+
+  /* read hash */
+  /*if ((err =*/ mp_read_unsigned_bin(&e, (unsigned char *)hash, (int)hash_size);/*) != MUTLS_OK)                { goto error; }*/
+
+  /*  &w  = &s^-1 mod n */
+  if ((err = mp_invmod(&s, &p, &w)) != MUTLS_OK)                                                          { goto error; }
+
+  /* &u1 = ew */
+  if ((err = mp_mulmod(&e, &w, &p, &u1)) != MUTLS_OK)                                                      { goto error; }
+
+  /* &u2 = rw */
+  if ((err = mp_mulmod(&r, &w, &p, &u2)) != MUTLS_OK)                                                      { goto error; }
+
+  /* find mG and mQ */
+  if ((err = mp_read_radix(&mG.x, (char *)key->curve->Gx, 16)) != MUTLS_OK)                               { goto error; }
+  if ((err = mp_read_radix(&mG.y, (char *)key->curve->Gy, 16)) != MUTLS_OK)                               { goto error; }
+  /*if ((err = */mp_set(&mG.z, 1);/*) != MUTLS_OK)                                                            { goto error; }*/
+
+  /*if ((err = */mp_copy(&key->pubkey.x, &mQ.x);/*) != MUTLS_OK)                                               { goto error; }*/
+  /*if ((err = */mp_copy(&key->pubkey.y, &mQ.y);/*) != MUTLS_OK)                                               { goto error; }*/
+  /*if ((err = */mp_copy(&key->pubkey.z, &mQ.z);/*) != MUTLS_OK)                                               { goto error; }*/
+
+  /* compute &u1*mG + &u2*mQ = mG */
+#ifndef LTC_ECC_SHAMIR
+//  if (ltc_mp.ecc_mul2add == NULL) {
+#endif
+     if ((err = ltc_ecc_mulmod(&u1, &mG, &mG, &m, 0)) != MUTLS_OK)                                       { goto error; }
+     if ((err = ltc_ecc_mulmod(&u2, &mQ, &mQ, &m, 0)) != MUTLS_OK)                                       { goto error; }
+
+     /* find the montgomery mp */
+     if ((err = mp_montgomery_setup(&m, &mp)) != MUTLS_OK)                                              { goto error; }
+
+     /* add them */
+     if ((err = ltc_ecc_projective_add_point(&mQ, &mG, &mG, &m, &mp)) != MUTLS_OK)                                      { goto error; }
+
+     /* reduce */
+     if ((err = ltc_ecc_map(&mG, &m, &mp)) != MUTLS_OK)                                                { goto error; }
+#ifdef LTC_ECC_SHAMIR
+     /* use Shamir'&s trick to compute &u1*mG + &u2*mQ using half of the doubles */
+     if ((err = ltc_ecc_mul2add(&mG, &u1, &mQ, &u2, &mG, &m)) != MUTLS_OK)                                { goto error; }
+#endif
+
+  /* &v = X_x1 mod n */
+  if ((err = mp_mod(&mG.x, &p, &v)) != MUTLS_OK)                                                         { goto error; }
+
+  /* does &v == &r */
+  if (mp_cmp(&v, &r) == MP_EQ) {
+    valid = true;
+  }
+
+error:
+  mp_clear_multi(&mG.x, &mG.y, &mG.z, &mQ.x, &mQ.y, &mQ.z, &r, &s, &v, &w, &u1, &u2, &p, &e, &m, NULL);
+  mp_montgomery_free(&mp);
+  if(err == MUTLS_OK)
+  {
+    if(valid)
+    {
+      return MUTLS_OK;
+    }
+    else
+    {
+      return MUTLS_ERR_WRONG_ECDSA;
+    }
+  }
+  else
+  {
+    return err;
+  }
+}
+
+mutls_err_t crypto_ecc_dh_generate_shared_secret(const crypto_ecc_private_key_t* private_key, const crypto_ecc_public_key_t* public_key, uint8_t* secret, size_t max_secret_size, size_t* secret_size)
+{
+  unsigned long  x;
+  ecc_point      result;
+  fp_int         prime;
+  int            err;
+
+  //Check that keys match the same curve
+  if (private_key->pub.curve->type != public_key->curve->type) {
+     return MUTLS_ERR_WRONG_CURVE;
+  }
+
+  /* make new point */
+  if (mp_init_multi(&result.x, &result.y, &result.z, NULL) != MUTLS_OK) {
+     return MUTLS_ERR_MEMORY;
+  }
+
+  /*if ((err = */mp_init(&prime);/*) != MUTLS_OK) {
+     mp_clear_multi(&result->x, &result->y, &result->z, NULL);
+     return err;
+  }*/
+
+  if ((err = mp_read_radix(&prime, (char *)private_key->pub.curve->prime, 16)) != MUTLS_OK)                               { goto done; }
+  if ((err = ltc_ecc_mulmod(&private_key->privkey, &public_key->pubkey, &result, &prime, 1)) != MUTLS_OK)                { goto done; }
+
+  x = (unsigned long)mp_unsigned_bin_size(&prime);
+  if (max_secret_size < x) {
+     *secret_size = x;
+     err = MUTLS_ERR_BUFFER_TOO_SMALL;
+     goto done;
+  }
+  zeromem(secret, x);
+  /*if ((err =*/ mp_to_unsigned_bin(&result.x, secret + (x - mp_unsigned_bin_size(&result.x)));/*)   != MUTLS_OK)           { goto done; }*/
+
+  err     = MUTLS_OK;
+  *secret_size = x;
+done:
+  mp_clear(&prime);
+  mp_clear_multi(&result.x, &result.y, &result.z, NULL);
+  return err;
+}
+
+//Decode (&r,&s) integers from ASN.1 Signature
+#define ENSURE_SIZE(actual_size, min_size) do{ if( (actual_size) < (min_size) ) { return MUTLS_ERR_PARAMETERS; } }while(0)
+mutls_err_t crypto_ecc_dsa_check_get_asn1_rs(void* r, void* s, const uint8_t* signature, size_t signature_size)
+{
+  const uint8_t* p = signature;
+  size_t sz = signature_size;
+
+  ENSURE_SIZE(sz, 1);
+
+  if( (p[0] != 0x30) && (p[0] != 0x31) ) //Sequence, SET types
+  {
+    return MUTLS_ERR_PARAMETERS;
+  }
+
+  p++;
+  sz--;
+
+  ENSURE_SIZE(sz, 1);
+
+  size_t seq_size;
+  //Get sequence length
+  if(*p < 0x80)
+  {
+    seq_size = p[0];
+    p++;
+    sz--;
+  }
+  else if(*p == 0x81)
+  {
+    ENSURE_SIZE(sz, 2);
+    seq_size = p[1];
+    p+=2;
+    sz-=2;
+  }
+  else if(*p == 0x82)
+  {
+    ENSURE_SIZE(sz, 3);
+    seq_size = (p[1] << 8) | p[2];
+    p+=3;
+    sz-=3;
+  }
+  else if(*p == 0x83)
+  {
+    ENSURE_SIZE(sz, 4);
+    seq_size = (p[1] << 16) | (p[2] << 8) | p[3];
+    p+=4;
+    sz-=4;
+  }
+  else if(*p == 0x84)
+  {
+    ENSURE_SIZE(sz, 5);
+    seq_size = (p[1] << 24) |(p[2] << 16) | (p[3] << 8) | p[4];
+    p+=5;
+    sz-=5;
+  }
+  else
+  {
+    return MUTLS_ERR_PARAMETERS;
+  }
+
+  //Check that sequence size == remaining bytes size
+  if( seq_size != sz )
+  {
+    return MUTLS_ERR_PARAMETERS;
+  }
+
+  //Read integers
+  for(int i = 0; i < 2; i++)
+  {
+    ENSURE_SIZE(sz, 1);
+
+    if( p[0] != 2 ) //Integer type
+    {
+      return MUTLS_ERR_PARAMETERS;
+    }
+
+    p++;
+    sz--;
+
+    ENSURE_SIZE(sz, 1);
+
+    size_t integer_size;
+    //Get sequence length
+    if(*p < 0x80)
+    {
+      integer_size = p[0];
+      p++;
+      sz--;
+    }
+    else if(*p == 0x81)
+    {
+      ENSURE_SIZE(sz, 2);
+      integer_size = p[1];
+      p+=2;
+      sz-=2;
+    }
+    else if(*p == 0x82)
+    {
+      ENSURE_SIZE(sz, 3);
+      integer_size = (p[1] << 8) | p[2];
+      p+=3;
+      sz-=3;
+    }
+    else if(*p == 0x83)
+    {
+      ENSURE_SIZE(sz, 4);
+      integer_size = (p[1] << 16) | (p[2] << 8) | p[3];
+      p+=4;
+      sz-=4;
+    }
+    else if(*p == 0x84)
+    {
+      ENSURE_SIZE(sz, 5);
+      integer_size = (p[1] << 24) |(p[2] << 16) | (p[3] << 8) | p[4];
+      p+=5;
+      sz-=5;
+    }
+    else
+    {
+      return MUTLS_ERR_PARAMETERS;
+    }
+
+    //Check that we have enough bytes remaining
+    ENSURE_SIZE(sz, integer_size);
+
+    //Read integer
+    void* integer = (i==0)?r:s;
+
+    /*int err;*/
+    /*if ((err = */mp_read_unsigned_bin(integer, (unsigned char *)p, integer_size);/*) != MUTLS_OK) {
+       return err;
+    }*/
+
+    p+=integer_size;
+    sz-=integer_size;
+  }
+
+  if(sz > 0)
+  {
+    //Unread parameters left in sequence
+    return MUTLS_ERR_PARAMETERS;
+  }
+
+  return MUTLS_OK;
+}
+
+//List of curves -- storing in strings is not optimal, TODO will have to be addressed at some point
+static const crypto_ecc_curve_t crypto_ecc_curves[] = {
+#if CRYPTO_ECC160
+{
+        20,
+        secp160r1,
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF",
+        "1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45",
+        "0100000000000000000001F4C8F927AED3CA752257",
+        "4A96B5688EF573284664698968C38BB913CBFC82",
+        "23A628553168947D59DCC912042351377AC5FB32",
+},
+#endif
+#if CRYPTO_ECC192
+{
+        24,
+        secp192r1,
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF",
+        "64210519E59C80E70FA7E9AB72243049FEB8DEECC146B9B1",
+        "FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831",
+        "188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF1012",
+        "7192B95FFC8DA78631011ED6B24CDD573F977A11E794811",
+},
+#endif
+#if CRYPTO_ECC224
+{
+        28,
+        secp224r1,
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000001",
+        "B4050A850C04B3ABF54132565044B0B7D7BFD8BA270B39432355FFB4",
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D",
+        "B70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21",
+        "BD376388B5F723FB4C22DFE6CD4375A05A07476444D5819985007E34",
+},
+#endif
+#if CRYPTO_ECC256
+{
+        32,
+        secp256r1,
+        "FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF",
+        "5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B",
+        "FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551",
+        "6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296",
+        "4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5",
+},
+#endif
+#if CRYPTO_ECC384
+{
+        48,
+        secp384r1,
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFF",
+        "B3312FA7E23EE7E4988E056BE3F82D19181D9C6EFE8141120314088F5013875AC656398D8A2ED19D2A85C8EDD3EC2AEF",
+        "FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973",
+        "AA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B9859F741E082542A385502F25DBF55296C3A545E3872760AB7",
+        "3617DE4A96262C6F5D9E98BF9292DC29F8F41DBD289A147CE9DA3113B5F0B8C00A60B1CE1D7E819D7A431D7C90EA0E5F",
+},
+#endif
+#if CRYPTO_ECC521
+{
+        66,
+        secp521r1,
+        "1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF",
+        "51953EB9618E1C9A1F929A21A0B68540EEA2DA725B99B315F3B8B489918EF109E156193951EC7E937B1652C0BD3BB1BF073573DF883D2C34F1EF451FD46B503F00",
+        "1FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5C9B8899C47AEBB6FB71E91386409",
+        "C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66",
+        "11839296A789A3BC0045C8A5FB42C7D1BD998F54449579B446817AFBD17273E662C97EE72995EF42640C550B9013FAD0761353C7086A272C24088BE94769FD16650",
+},
+#endif
+{0,},
+};