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Moved cpp code to src/cpp and js code to src/js.
This commit is contained in:
Stefan Thomas
340
src/cpp/ripple/DeterministicKeys.cpp
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340
src/cpp/ripple/DeterministicKeys.cpp
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#include <openssl/ec.h>
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#include <openssl/bn.h>
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#include <openssl/ecdsa.h>
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#include <openssl/pem.h>
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#include <openssl/err.h>
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// #define EC_DEBUG
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// Functions to add CKey support for deterministic EC keys
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#include <boost/test/unit_test.hpp>
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#include "Serializer.h"
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#include "Log.h"
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// <-- seed
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uint128 CKey::PassPhraseToKey(const std::string& passPhrase)
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{
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Serializer s;
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s.addRaw(passPhrase);
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uint256 hash256 = s.getSHA512Half();
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uint128 ret(hash256);
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s.secureErase();
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return ret;
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}
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// --> seed
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// <-- private root generator + public root generator
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EC_KEY* CKey::GenerateRootDeterministicKey(const uint128& seed)
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{
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BN_CTX* ctx=BN_CTX_new();
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if(!ctx) return NULL;
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EC_KEY* pkey=EC_KEY_new_by_curve_name(NID_secp256k1);
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if(!pkey)
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{
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BN_CTX_free(ctx);
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return NULL;
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}
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EC_KEY_set_conv_form(pkey, POINT_CONVERSION_COMPRESSED);
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BIGNUM* order=BN_new();
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if(!order)
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{
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BN_CTX_free(ctx);
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EC_KEY_free(pkey);
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return NULL;
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}
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if(!EC_GROUP_get_order(EC_KEY_get0_group(pkey), order, ctx))
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{
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assert(false);
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BN_free(order);
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EC_KEY_free(pkey);
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BN_CTX_free(ctx);
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return NULL;
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}
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BIGNUM *privKey=NULL;
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int seq=0;
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do
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{ // private key must be non-zero and less than the curve's order
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Serializer s((128+32)/8);
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s.add128(seed);
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s.add32(seq++);
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uint256 root=s.getSHA512Half();
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s.secureErase();
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privKey=BN_bin2bn((const unsigned char *) &root, sizeof(root), privKey);
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if(privKey==NULL)
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{
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EC_KEY_free(pkey);
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BN_free(order);
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BN_CTX_free(ctx);
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}
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root.zero();
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} while(BN_is_zero(privKey) || (BN_cmp(privKey, order)>=0));
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BN_free(order);
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if(!EC_KEY_set_private_key(pkey, privKey))
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{ // set the random point as the private key
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assert(false);
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EC_KEY_free(pkey);
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BN_clear_free(privKey);
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BN_CTX_free(ctx);
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return NULL;
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}
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EC_POINT *pubKey=EC_POINT_new(EC_KEY_get0_group(pkey));
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if(!EC_POINT_mul(EC_KEY_get0_group(pkey), pubKey, privKey, NULL, NULL, ctx))
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{ // compute the corresponding public key point
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assert(false);
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BN_clear_free(privKey);
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EC_POINT_free(pubKey);
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EC_KEY_free(pkey);
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BN_CTX_free(ctx);
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return NULL;
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}
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BN_clear_free(privKey);
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if(!EC_KEY_set_public_key(pkey, pubKey))
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{
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assert(false);
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EC_POINT_free(pubKey);
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EC_KEY_free(pkey);
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BN_CTX_free(ctx);
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return NULL;
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}
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EC_POINT_free(pubKey);
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BN_CTX_free(ctx);
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#ifdef EC_DEBUG
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assert(EC_KEY_check_key(pkey)==1); // CAUTION: This check is *very* expensive
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#endif
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return pkey;
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}
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// Take ripple address.
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// --> root public generator (consumes)
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// <-- root public generator in EC format
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EC_KEY* CKey::GenerateRootPubKey(BIGNUM* pubGenerator)
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{
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if (pubGenerator == NULL)
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{
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assert(false);
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return NULL;
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}
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EC_KEY* pkey = EC_KEY_new_by_curve_name(NID_secp256k1);
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if (!pkey)
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{
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BN_free(pubGenerator);
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return NULL;
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}
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EC_KEY_set_conv_form(pkey, POINT_CONVERSION_COMPRESSED);
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EC_POINT* pubPoint = EC_POINT_bn2point(EC_KEY_get0_group(pkey), pubGenerator, NULL, NULL);
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BN_free(pubGenerator);
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if(!pubPoint)
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{
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assert(false);
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EC_KEY_free(pkey);
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return NULL;
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}
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if(!EC_KEY_set_public_key(pkey, pubPoint))
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{
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assert(false);
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EC_POINT_free(pubPoint);
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EC_KEY_free(pkey);
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return NULL;
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}
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return pkey;
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}
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// --> public generator
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static BIGNUM* makeHash(const RippleAddress& pubGen, int seq, BIGNUM* order)
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{
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int subSeq=0;
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BIGNUM* ret=NULL;
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do
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{
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Serializer s((33*8+32+32)/8);
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s.addRaw(pubGen.getGenerator());
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s.add32(seq);
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s.add32(subSeq++);
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uint256 root=s.getSHA512Half();
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s.secureErase();
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ret=BN_bin2bn((const unsigned char *) &root, sizeof(root), ret);
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if(!ret) return NULL;
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} while (BN_is_zero(ret) || (BN_cmp(ret, order)>=0));
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return ret;
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}
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// --> public generator
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EC_KEY* CKey::GeneratePublicDeterministicKey(const RippleAddress& pubGen, int seq)
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{ // publicKey(n) = rootPublicKey EC_POINT_+ Hash(pubHash|seq)*point
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EC_KEY* rootKey = CKey::GenerateRootPubKey(pubGen.getGeneratorBN());
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const EC_POINT* rootPubKey = EC_KEY_get0_public_key(rootKey);
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BN_CTX* ctx = BN_CTX_new();
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EC_KEY* pkey = EC_KEY_new_by_curve_name(NID_secp256k1);
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EC_POINT* newPoint = 0;
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BIGNUM* order = 0;
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BIGNUM* hash = 0;
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bool success = true;
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if (!ctx || !pkey) success = false;
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if (success)
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EC_KEY_set_conv_form(pkey, POINT_CONVERSION_COMPRESSED);
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if (success) {
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newPoint = EC_POINT_new(EC_KEY_get0_group(pkey));
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if(!newPoint) success = false;
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}
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if (success) {
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order = BN_new();
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if(!order || !EC_GROUP_get_order(EC_KEY_get0_group(pkey), order, ctx))
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success = false;
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}
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// Calculate the private additional key.
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if (success) {
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hash = makeHash(pubGen, seq, order);
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if(!hash) success = false;
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}
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if (success) {
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// Calculate the corresponding public key.
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EC_POINT_mul(EC_KEY_get0_group(pkey), newPoint, hash, NULL, NULL, ctx);
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// Add the master public key and set.
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EC_POINT_add(EC_KEY_get0_group(pkey), newPoint, newPoint, rootPubKey, ctx);
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EC_KEY_set_public_key(pkey, newPoint);
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}
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if (order) BN_free(order);
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if (hash) BN_free(hash);
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if (newPoint) EC_POINT_free(newPoint);
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if (ctx) BN_CTX_free(ctx);
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if (rootKey) EC_KEY_free(rootKey);
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if (pkey && !success) EC_KEY_free(pkey);
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return success ? pkey : NULL;
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}
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EC_KEY* CKey::GeneratePrivateDeterministicKey(const RippleAddress& pubGen, const uint256& u, int seq)
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{
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CBigNum bn(u);
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return GeneratePrivateDeterministicKey(pubGen, static_cast<BIGNUM*>(&bn), seq);
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}
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// --> root private key
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EC_KEY* CKey::GeneratePrivateDeterministicKey(const RippleAddress& pubGen, const BIGNUM* rootPrivKey, int seq)
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{ // privateKey(n) = (rootPrivateKey + Hash(pubHash|seq)) % order
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BN_CTX* ctx=BN_CTX_new();
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if(ctx==NULL) return NULL;
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EC_KEY* pkey=EC_KEY_new_by_curve_name(NID_secp256k1);
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if(pkey==NULL)
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{
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BN_CTX_free(ctx);
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return NULL;
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}
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EC_KEY_set_conv_form(pkey, POINT_CONVERSION_COMPRESSED);
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BIGNUM* order=BN_new();
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if(order==NULL)
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{
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BN_CTX_free(ctx);
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EC_KEY_free(pkey);
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return NULL;
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}
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if(!EC_GROUP_get_order(EC_KEY_get0_group(pkey), order, ctx))
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{
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BN_free(order);
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BN_CTX_free(ctx);
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EC_KEY_free(pkey);
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return NULL;
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}
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// calculate the private additional key
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BIGNUM* privKey=makeHash(pubGen, seq, order);
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if(privKey==NULL)
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{
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BN_free(order);
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BN_CTX_free(ctx);
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EC_KEY_free(pkey);
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return NULL;
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}
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// calculate the final private key
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BN_mod_add(privKey, privKey, rootPrivKey, order, ctx);
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BN_free(order);
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EC_KEY_set_private_key(pkey, privKey);
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// compute the corresponding public key
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EC_POINT* pubKey=EC_POINT_new(EC_KEY_get0_group(pkey));
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if(!pubKey)
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{
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BN_clear_free(privKey);
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BN_CTX_free(ctx);
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EC_KEY_free(pkey);
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return NULL;
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}
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if(EC_POINT_mul(EC_KEY_get0_group(pkey), pubKey, privKey, NULL, NULL, ctx)==0)
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{
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BN_clear_free(privKey);
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BN_CTX_free(ctx);
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EC_KEY_free(pkey);
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return NULL;
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}
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BN_clear_free(privKey);
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EC_KEY_set_public_key(pkey, pubKey);
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EC_POINT_free(pubKey);
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BN_CTX_free(ctx);
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return pkey;
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}
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BOOST_AUTO_TEST_SUITE(DeterministicKeys_test)
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BOOST_AUTO_TEST_CASE(DeterminsticKeys_test1)
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{
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Log(lsDEBUG) << "Beginning deterministic key test";
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uint128 seed1, seed2;
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seed1.SetHex("71ED064155FFADFA38782C5E0158CB26");
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seed2.SetHex("CF0C3BE4485961858C4198515AE5B965");
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CKey root1(seed1), root2(seed2);
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uint256 priv1, priv2;
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root1.GetPrivateKeyU(priv1);
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root2.GetPrivateKeyU(priv2);
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if (priv1.GetHex() != "7CFBA64F771E93E817E15039215430B53F7401C34931D111EAB3510B22DBB0D8")
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BOOST_FAIL("Incorrect private key for generator");
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if (priv2.GetHex() != "98BC2EACB26EB021D1A6293C044D88BA2F0B6729A2772DEEBF2E21A263C1740B")
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BOOST_FAIL("Incorrect private key for generator");
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RippleAddress nSeed;
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nSeed.setSeed(seed1);
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if (nSeed.humanSeed() != "shHM53KPZ87Gwdqarm1bAmPeXg8Tn")
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BOOST_FAIL("Incorrect human seed");
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if (nSeed.humanSeed1751() != "MAD BODY ACE MINT OKAY HUB WHAT DATA SACK FLAT DANA MATH")
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BOOST_FAIL("Incorrect 1751 seed");
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}
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BOOST_AUTO_TEST_SUITE_END();
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// vim:ts=4
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