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fix ethereum_address_checksum implementation

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This commit is contained in:
Pavol Rusnak 2017-07-11 21:17:22 +02:00
parent ce81cc61df
commit f49fe75e15
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GPG Key ID: 91F3B339B9A02A3D
2 changed files with 37 additions and 18 deletions
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20
address.c
View File

@ -58,13 +58,21 @@ bool address_check_prefix(const uint8_t *addr, uint32_t address_type)
void ethereum_address_checksum(const uint8_t *addr, char *address)
{
const char *hexU = "0123456789ABCDEF", *hexL = "0123456789abcdef";
uint8_t hash[32];
keccak_256(addr, 20, hash);
for (int i = 0; i < 40; i++) {
const char *t = (hash[i / 8] & (1 << (7 - i % 8))) ? hexU : hexL;
address[i] = (i % 2 == 0) ? t[(addr[i / 2] >> 4) & 0xF] : t[addr[i / 2] & 0xF];
const char *hex = "0123456789abcdef";
for (int i = 0; i < 20; i++) {
address[i * 2] = hex[(addr[i] >> 4) & 0xF];
address[i * 2 + 1] = hex[addr[i] & 0xF];
}
address[40] = 0;
uint8_t hash[32];
keccak_256((const uint8_t *)address, 40, hash);
for (int i = 0; i < 20; i++) {
if (hash[i] & 0x80 && address[i * 2 ] >= 'a' && address[i * 2 ] <= 'f') {
address[i * 2] -= 0x20;
}
if (hash[i] & 0x08 && address[i * 2 + 1] >= 'a' && address[i * 2 + 1] <= 'f') {
address[i * 2 + 1] -= 0x20;
}
}
}
#endif

33
test_check.c
View File

@ -3080,20 +3080,31 @@ END_TEST
START_TEST(test_ethereum_address)
{
static const char *vectors[] = {
"52908400098527886E0F7030069857D2E4169EE7",
"8617E340B3D01FA5F11F306F4090FD50E238070D",
"de709f2102306220921060314715629080e2fb77",
"27b1fdb04752bbc536007a920d24acb045561c26",
"5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed",
"fB6916095ca1df60bB79Ce92cE3Ea74c37c5d359",
"dbF03B407c01E7cD3CBea99509d93f8DDDC8C6FB",
"D1220A0cf47c7B9Be7A2E6BA89F429762e7b9aDb",
"5A4EAB120fB44eb6684E5e32785702FF45ea344D",
"5be4BDC48CeF65dbCbCaD5218B1A7D37F58A0741",
"a7dD84573f5ffF821baf2205745f768F8edCDD58",
"027a49d11d118c0060746F1990273FcB8c2fC196",
"CD2a3d9F938E13CD947Ec05AbC7FE734Df8DD826",
0
};
uint8_t addr[20];
char address[41];
memcpy(addr, fromhex("cd2a3d9f938e13cd947ec05abc7fe734df8dd826"), 20);
const char **vec = vectors;
while (*vec) {
memcpy(addr, fromhex(*vec), 20);
ethereum_address_checksum(addr, address);
ck_assert_str_eq(address, "Cd2a3d9f938e13Cd947eC05ABC7fe734df8DD826");
memcpy(addr, fromhex("9ca0e998df92c5351cecbbb6dba82ac2266f7e0c"), 20);
ethereum_address_checksum(addr, address);
ck_assert_str_eq(address, "9Ca0e998dF92c5351cEcbBb6Dba82Ac2266f7e0C");
memcpy(addr, fromhex("cb16d0e54450cdd2368476e762b09d147972b637"), 20);
ethereum_address_checksum(addr, address);
ck_assert_str_eq(address, "cB16D0E54450Cdd2368476E762B09D147972b637");
ck_assert_str_eq(address, *vec);
vec++;
}
}
END_TEST