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don't use implicit versions in bip32

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pull/25/head
Pavol Rusnak 10 years ago
parent 8764a03453
commit c0ee25c851
3 changed files with 38 additions and 23 deletions
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42
bip32.c
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@ -7,30 +7,44 @@
#include "sha2.h"
#include "ripemd160.h"
uint8_t hdnode_coin_version = 0x00;
void hdnode_from_pub(uint32_t version, uint32_t depth, uint32_t fingerprint, uint32_t child_num, uint8_t *chain_code, uint8_t *public_key, HDNode *out)
void hdnode_from_xpub(uint8_t version_byte, uint32_t version, uint32_t depth, uint32_t fingerprint, uint32_t child_num, uint8_t *chain_code, uint8_t *public_key, HDNode *out)
{
out->version = version;
out->depth = depth;
out->fingerprint = fingerprint;
out->child_num = child_num;
memset(out->private_key, 0, 32);
memcpy(out->chain_code, chain_code, 32);
memset(out->private_key, 0, 32);
memcpy(out->public_key, public_key, 33);
out->version_byte = version_byte;
hdnode_fill_address(out);
}
void hdnode_from_seed(uint8_t *seed, int seed_len, HDNode *out)
void hdnode_from_xprv(uint8_t version_byte, uint32_t version, uint32_t depth, uint32_t fingerprint, uint32_t child_num, uint8_t *chain_code, uint8_t *private_key, HDNode *out)
{
out->version = 0x0488ADE4; // main-net
out->version = version;
out->depth = depth;
out->fingerprint = fingerprint;
out->child_num = child_num;
memcpy(out->chain_code, chain_code, 32);
memcpy(out->private_key, private_key, 32);
hdnode_fill_public_key(out);
out->version_byte = version_byte;
hdnode_fill_address(out);
}
void hdnode_from_seed(uint8_t version_byte, uint32_t version, uint8_t *seed, int seed_len, HDNode *out)
{
uint8_t I[32 + 32];
out->version = version;
out->depth = 0;
out->fingerprint = 0x00000000;
out->child_num = 0;
// this can be done because private_key[32] and chain_code[32]
// form a continuous 64 byte block in the memory
hmac_sha512((uint8_t *)"Bitcoin seed", 12, seed, seed_len, out->private_key);
hmac_sha512((uint8_t *)"Bitcoin seed", 12, seed, seed_len, I);
memcpy(out->chain_code, I + 32, 32);
memcpy(out->private_key, I, 32);
hdnode_fill_public_key(out);
out->version_byte = version_byte;
hdnode_fill_address(out);
}
@ -56,8 +70,8 @@ int hdnode_private_ckd(HDNode *inout, uint32_t i)
bn_read_be(inout->private_key, &a);
hmac_sha512(inout->chain_code, 32, data, sizeof(data), I);
memcpy(inout->private_key, I, 32);
memcpy(inout->chain_code, I + 32, 32);
memcpy(inout->private_key, I, 32);
bn_read_be(inout->private_key, &b);
bn_addmod(&a, &b, &order256k1);
@ -110,12 +124,12 @@ int hdnode_public_ckd(HDNode *inout, uint32_t i)
return 1;
}
void hdnode_fill_public_key(HDNode *xprv)
void hdnode_fill_public_key(HDNode *node)
{
ecdsa_get_public_key33(xprv->private_key, xprv->public_key);
ecdsa_get_public_key33(node->private_key, node->public_key);
}
void hdnode_fill_address(HDNode *xprv)
void hdnode_fill_address(HDNode *node)
{
ecdsa_get_address(xprv->public_key, hdnode_coin_version, xprv->address);
ecdsa_get_address(node->public_key, node->version_byte, node->address);
}

13
bip32.h
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@ -8,17 +8,18 @@ typedef struct {
uint32_t depth;
uint32_t fingerprint;
uint32_t child_num;
uint8_t private_key[32];
uint8_t chain_code[32];
uint8_t private_key[32];
uint8_t public_key[33];
uint8_t version_byte;
char address[35];
} HDNode;
extern uint8_t hdnode_coin_version;
void hdnode_from_xpub(uint8_t version_byte, uint32_t version, uint32_t depth, uint32_t fingerprint, uint32_t child_num, uint8_t *chain_code, uint8_t *public_key, HDNode *out);
void hdnode_from_pub(uint32_t version, uint32_t depth, uint32_t fingerprint, uint32_t child_num, uint8_t *chain_code, uint8_t *public_key, HDNode *out);
void hdnode_from_xprv(uint8_t version_byte, uint32_t version, uint32_t depth, uint32_t fingerprint, uint32_t child_num, uint8_t *chain_code, uint8_t *private_key, HDNode *out);
void hdnode_from_seed(uint8_t *seed, int seed_len, HDNode *out);
void hdnode_from_seed(uint8_t version_byte, uint32_t version, uint8_t *seed, int seed_len, HDNode *out);
#define hdnode_private_ckd_prime(X, I) hdnode_private_ckd((X), ((I) | 0x80000000))
@ -26,8 +27,8 @@ int hdnode_private_ckd(HDNode *inout, uint32_t i);
int hdnode_public_ckd(HDNode *inout, uint32_t i);
void hdnode_fill_public_key(HDNode *xprv);
void hdnode_fill_public_key(HDNode *node);
void hdnode_fill_address(HDNode *xprv);
void hdnode_fill_address(HDNode *node);
#endif

6
tests.c
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@ -80,7 +80,7 @@ START_TEST(test_bip32_vector_1)
HDNode node;
// init m
hdnode_from_seed(fromhex("000102030405060708090a0b0c0d0e0f"), 16, &node);
hdnode_from_seed(0x00, 0x0488B21E, fromhex("000102030405060708090a0b0c0d0e0f"), 16, &node);
// [Chain m]
ck_assert_int_eq(node.fingerprint, 0x00000000);
@ -138,7 +138,7 @@ START_TEST(test_bip32_vector_2)
int r;
// init m
hdnode_from_seed(fromhex("fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542"), 64, &node);
hdnode_from_seed(0x00, 0x0488B21E, fromhex("fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542"), 64, &node);
// [Chain m]
ck_assert_int_eq(node.fingerprint, 0x00000000);
@ -193,7 +193,7 @@ START_TEST(test_bip32_vector_2)
ck_assert_str_eq(node.address, "14UKfRV9ZPUp6ZC9PLhqbRtxdihW9em3xt");
// init m
hdnode_from_seed(fromhex("fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542"), 64, &node);
hdnode_from_seed(0x00, 0x0488B21E, fromhex("fffcf9f6f3f0edeae7e4e1dedbd8d5d2cfccc9c6c3c0bdbab7b4b1aeaba8a5a29f9c999693908d8a8784817e7b7875726f6c696663605d5a5754514e4b484542"), 64, &node);
// test public derivation
// [Chain m/0]

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