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ethereum: use original ethereum message digest

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This commit is contained in:
Pavol Rusnak 2018-05-25 14:22:54 +02:00
parent bccba48f41
commit 1f470cf1f1
No known key found for this signature in database
GPG Key ID: 91F3B339B9A02A3D
1 changed files with 11 additions and 3 deletions
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14
firmware/ethereum.c
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@ -628,9 +628,17 @@ static void ethereum_message_hash(const uint8_t *message, size_t message_len, ui
struct SHA3_CTX ctx;
sha3_256_Init(&ctx);
sha3_Update(&ctx, (const uint8_t *)"\x19" "Ethereum Signed Message:\n", 26);
uint8_t varint[5];
uint32_t l = ser_length(message_len, varint);
sha3_Update(&ctx, varint, l);
uint8_t c;
if (message_len > 1000000000) { c = '0' + message_len / 1000000000 % 10; sha3_Update(&ctx, &c, 1); }
if (message_len > 100000000) { c = '0' + message_len / 100000000 % 10; sha3_Update(&ctx, &c, 1); }
if (message_len > 10000000) { c = '0' + message_len / 10000000 % 10; sha3_Update(&ctx, &c, 1); }
if (message_len > 1000000) { c = '0' + message_len / 1000000 % 10; sha3_Update(&ctx, &c, 1); }
if (message_len > 100000) { c = '0' + message_len / 100000 % 10; sha3_Update(&ctx, &c, 1); }
if (message_len > 10000) { c = '0' + message_len / 10000 % 10; sha3_Update(&ctx, &c, 1); }
if (message_len > 1000) { c = '0' + message_len / 1000 % 10; sha3_Update(&ctx, &c, 1); }
if (message_len > 100) { c = '0' + message_len / 100 % 10; sha3_Update(&ctx, &c, 1); }
if (message_len > 10) { c = '0' + message_len / 10 % 10; sha3_Update(&ctx, &c, 1); }
c = '0' + message_len % 10; sha3_Update(&ctx, &c, 1);
sha3_Update(&ctx, message, message_len);
keccak_Final(&ctx, hash);
}