From: coblee Date: Sun, 6 Nov 2011 23:20:00 +0000 (-0800) Subject: Add Litecoin scrypt proof of work and use scrypt instead of hash256 if we are on... X-Git-Tag: 0.8.2~181 X-Git-Url: https://git.novaco.in/?a=commitdiff_plain;h=da1454df304856640c00292b210e099b9a53c9b0;p=p2pool.git Add Litecoin scrypt proof of work and use scrypt instead of hash256 if we are on Litecoin network. --- diff --git a/p2pool/bitcoin/data.py b/p2pool/bitcoin/data.py index 473ea3a..e0c1d9a 100644 --- a/p2pool/bitcoin/data.py +++ b/p2pool/bitcoin/data.py @@ -106,6 +106,13 @@ class Type(object): def hash256(self, obj): return HashType().unpack(hashlib.sha256(hashlib.sha256(self.pack(obj)).digest()).digest()) + ltc_scrypt = None + def scrypt(self, obj): + # dynamically import ltc_scrypt so you will only get an error on runtime + if (not self.ltc_scrypt): + self.ltc_scrypt = __import__('ltc_scrypt') + return HashType().unpack(self.ltc_scrypt.getPoWHash(self.pack(obj))) + class VarIntType(Type): # redundancy doesn't matter here because bitcoin and p2pool both reencode before hashing def read(self, file): diff --git a/p2pool/data.py b/p2pool/data.py index add9e52..37fd919 100644 --- a/p2pool/data.py +++ b/p2pool/data.py @@ -98,20 +98,20 @@ def share_info_to_gentx(share_info, block_target, tracker, net): class Share(object): @classmethod - def from_block(cls, block): - return cls(block['header'], gentx_to_share_info(block['txs'][0]), other_txs=block['txs'][1:]) + def from_block(cls, block, net): + return cls(net, block['header'], gentx_to_share_info(block['txs'][0]), other_txs=block['txs'][1:]) @classmethod - def from_share1a(cls, share1a): - return cls(**share1a) + def from_share1a(cls, share1a, net): + return cls(net, **share1a) @classmethod - def from_share1b(cls, share1b): - return cls(**share1b) + def from_share1b(cls, share1b, net): + return cls(net, **share1b) __slots__ = 'header previous_block share_info merkle_branch other_txs timestamp share_data new_script subsidy previous_hash previous_share_hash target nonce bitcoin_hash hash time_seen shared stored peer'.split(' ') - def __init__(self, header, share_info, merkle_branch=None, other_txs=None): + def __init__(self, net, header, share_info, merkle_branch=None, other_txs=None): if merkle_branch is None and other_txs is None: raise ValueError('need either merkle_branch or other_txs') if other_txs is not None: @@ -145,13 +145,18 @@ class Share(object): if len(self.nonce) > 100: raise ValueError('nonce too long!') - - self.bitcoin_hash = bitcoin_data.block_header_type.hash256(header) - self.hash = share1a_type.hash256(self.as_share1a()) - + + # use scrypt for Litecoin + if (getattr(net, 'BITCOIN_POW_SCRYPT', False)): + self.bitcoin_hash = bitcoin_data.block_header_type.scrypt(header) + self.hash = share1a_type.scrypt(self.as_share1a()) + else: + self.bitcoin_hash = bitcoin_data.block_header_type.hash256(header) + self.hash = share1a_type.hash256(self.as_share1a()) + if self.bitcoin_hash > self.target: - print 'hash', hex(self.bitcoin_hash) - print 'targ', hex(self.target) + print 'hash %x' % self.bitcoin_hash + print 'targ %x' % self.target raise ValueError('not enough work!') if script.get_sigop_count(self.new_script) > 1: @@ -466,11 +471,11 @@ class ShareStore(object): type_id_str, data_hex = line.strip().split(' ') type_id = int(type_id_str) if type_id == 0: - share = Share.from_share1a(share1a_type.unpack(data_hex.decode('hex'))) + share = Share.from_share1a(share1a_type.unpack(data_hex.decode('hex')), self.net) yield 'share', share share_hashes.add(share.hash) elif type_id == 1: - share = Share.from_share1b(share1b_type.unpack(data_hex.decode('hex'))) + share = Share.from_share1b(share1b_type.unpack(data_hex.decode('hex')), self.net) yield 'share', share share_hashes.add(share.hash) elif type_id == 2: @@ -686,7 +691,7 @@ class LitecoinTestnet(litecoin.LitecoinTestnet): PREFIX = 'ad9614f6466a39cf'.decode('hex') NAME = 'litecoin_testnet' P2P_PORT = 19338 - MAX_TARGET = 2**256//2**20 - 1 + MAX_TARGET = 2**256//2**17 - 1 PERSIST = False WORKER_PORT = 19327 diff --git a/p2pool/litecoin.py b/p2pool/litecoin.py index 81a0916..1a2a6ac 100644 --- a/p2pool/litecoin.py +++ b/p2pool/litecoin.py @@ -10,6 +10,7 @@ class LitecoinMainnet(object): not (yield bitcoind.rpc_getinfo())['testnet'] ))) BITCOIN_SUBSIDY_FUNC = staticmethod(lambda height: 50*100000000 >> (height + 1)//840000) + BITCOIN_POW_SCRYPT = True; BITCOIN_SYMBOL = 'LTC' class LitecoinTestnet(object): @@ -22,4 +23,5 @@ class LitecoinTestnet(object): (yield bitcoind.rpc_getinfo())['testnet'] ))) BITCOIN_SUBSIDY_FUNC = staticmethod(lambda height: 50*100000000 >> (height + 1)//840000) + BITCOIN_POW_SCRYPT = True; BITCOIN_SYMBOL = 'tLTC' diff --git a/p2pool/litecoin/scrypt.c b/p2pool/litecoin/scrypt.c new file mode 100644 index 0000000..ef1f317 --- /dev/null +++ b/p2pool/litecoin/scrypt.c @@ -0,0 +1,681 @@ +/*- + * Copyright 2009 Colin Percival, 2011 ArtForz + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * This file was originally written by Colin Percival as part of the Tarsnap + * online backup system. + */ + +#include "scrypt.h" +#include +#include +#include + +static inline uint32_t +be32dec(const void *pp) +{ + const uint8_t *p = (uint8_t const *)pp; + + return ((uint32_t)(p[3]) + ((uint32_t)(p[2]) << 8) + + ((uint32_t)(p[1]) << 16) + ((uint32_t)(p[0]) << 24)); +} + +static inline void +be32enc(void *pp, uint32_t x) +{ + uint8_t * p = (uint8_t *)pp; + + p[3] = x & 0xff; + p[2] = (x >> 8) & 0xff; + p[1] = (x >> 16) & 0xff; + p[0] = (x >> 24) & 0xff; +} + +static inline uint32_t +le32dec(const void *pp) +{ + const uint8_t *p = (uint8_t const *)pp; + + return ((uint32_t)(p[0]) + ((uint32_t)(p[1]) << 8) + + ((uint32_t)(p[2]) << 16) + ((uint32_t)(p[3]) << 24)); +} + +static inline void +le32enc(void *pp, uint32_t x) +{ + uint8_t * p = (uint8_t *)pp; + + p[0] = x & 0xff; + p[1] = (x >> 8) & 0xff; + p[2] = (x >> 16) & 0xff; + p[3] = (x >> 24) & 0xff; +} + + +typedef struct SHA256Context { + uint32_t state[8]; + uint32_t count[2]; + unsigned char buf[64]; +} SHA256_CTX; + +typedef struct HMAC_SHA256Context { + SHA256_CTX ictx; + SHA256_CTX octx; +} HMAC_SHA256_CTX; + +/* + * Encode a length len/4 vector of (uint32_t) into a length len vector of + * (unsigned char) in big-endian form. Assumes len is a multiple of 4. + */ +static void +be32enc_vect(unsigned char *dst, const uint32_t *src, size_t len) +{ + size_t i; + + for (i = 0; i < len / 4; i++) + be32enc(dst + i * 4, src[i]); +} + +/* + * Decode a big-endian length len vector of (unsigned char) into a length + * len/4 vector of (uint32_t). Assumes len is a multiple of 4. + */ +static void +be32dec_vect(uint32_t *dst, const unsigned char *src, size_t len) +{ + size_t i; + + for (i = 0; i < len / 4; i++) + dst[i] = be32dec(src + i * 4); +} + +/* Elementary functions used by SHA256 */ +#define Ch(x, y, z) ((x & (y ^ z)) ^ z) +#define Maj(x, y, z) ((x & (y | z)) | (y & z)) +#define SHR(x, n) (x >> n) +#define ROTR(x, n) ((x >> n) | (x << (32 - n))) +#define S0(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22)) +#define S1(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25)) +#define s0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3)) +#define s1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10)) + +/* SHA256 round function */ +#define RND(a, b, c, d, e, f, g, h, k) \ + t0 = h + S1(e) + Ch(e, f, g) + k; \ + t1 = S0(a) + Maj(a, b, c); \ + d += t0; \ + h = t0 + t1; + +/* Adjusted round function for rotating state */ +#define RNDr(S, W, i, k) \ + RND(S[(64 - i) % 8], S[(65 - i) % 8], \ + S[(66 - i) % 8], S[(67 - i) % 8], \ + S[(68 - i) % 8], S[(69 - i) % 8], \ + S[(70 - i) % 8], S[(71 - i) % 8], \ + W[i] + k) + +/* + * SHA256 block compression function. The 256-bit state is transformed via + * the 512-bit input block to produce a new state. + */ +static void +SHA256_Transform(uint32_t * state, const unsigned char block[64]) +{ + uint32_t W[64]; + uint32_t S[8]; + uint32_t t0, t1; + int i; + + /* 1. Prepare message schedule W. */ + be32dec_vect(W, block, 64); + for (i = 16; i < 64; i++) + W[i] = s1(W[i - 2]) + W[i - 7] + s0(W[i - 15]) + W[i - 16]; + + /* 2. Initialize working variables. */ + memcpy(S, state, 32); + + /* 3. Mix. */ + RNDr(S, W, 0, 0x428a2f98); + RNDr(S, W, 1, 0x71374491); + RNDr(S, W, 2, 0xb5c0fbcf); + RNDr(S, W, 3, 0xe9b5dba5); + RNDr(S, W, 4, 0x3956c25b); + RNDr(S, W, 5, 0x59f111f1); + RNDr(S, W, 6, 0x923f82a4); + RNDr(S, W, 7, 0xab1c5ed5); + RNDr(S, W, 8, 0xd807aa98); + RNDr(S, W, 9, 0x12835b01); + RNDr(S, W, 10, 0x243185be); + RNDr(S, W, 11, 0x550c7dc3); + RNDr(S, W, 12, 0x72be5d74); + RNDr(S, W, 13, 0x80deb1fe); + RNDr(S, W, 14, 0x9bdc06a7); + RNDr(S, W, 15, 0xc19bf174); + RNDr(S, W, 16, 0xe49b69c1); + RNDr(S, W, 17, 0xefbe4786); + RNDr(S, W, 18, 0x0fc19dc6); + RNDr(S, W, 19, 0x240ca1cc); + RNDr(S, W, 20, 0x2de92c6f); + RNDr(S, W, 21, 0x4a7484aa); + RNDr(S, W, 22, 0x5cb0a9dc); + RNDr(S, W, 23, 0x76f988da); + RNDr(S, W, 24, 0x983e5152); + RNDr(S, W, 25, 0xa831c66d); + RNDr(S, W, 26, 0xb00327c8); + RNDr(S, W, 27, 0xbf597fc7); + RNDr(S, W, 28, 0xc6e00bf3); + RNDr(S, W, 29, 0xd5a79147); + RNDr(S, W, 30, 0x06ca6351); + RNDr(S, W, 31, 0x14292967); + RNDr(S, W, 32, 0x27b70a85); + RNDr(S, W, 33, 0x2e1b2138); + RNDr(S, W, 34, 0x4d2c6dfc); + RNDr(S, W, 35, 0x53380d13); + RNDr(S, W, 36, 0x650a7354); + RNDr(S, W, 37, 0x766a0abb); + RNDr(S, W, 38, 0x81c2c92e); + RNDr(S, W, 39, 0x92722c85); + RNDr(S, W, 40, 0xa2bfe8a1); + RNDr(S, W, 41, 0xa81a664b); + RNDr(S, W, 42, 0xc24b8b70); + RNDr(S, W, 43, 0xc76c51a3); + RNDr(S, W, 44, 0xd192e819); + RNDr(S, W, 45, 0xd6990624); + RNDr(S, W, 46, 0xf40e3585); + RNDr(S, W, 47, 0x106aa070); + RNDr(S, W, 48, 0x19a4c116); + RNDr(S, W, 49, 0x1e376c08); + RNDr(S, W, 50, 0x2748774c); + RNDr(S, W, 51, 0x34b0bcb5); + RNDr(S, W, 52, 0x391c0cb3); + RNDr(S, W, 53, 0x4ed8aa4a); + RNDr(S, W, 54, 0x5b9cca4f); + RNDr(S, W, 55, 0x682e6ff3); + RNDr(S, W, 56, 0x748f82ee); + RNDr(S, W, 57, 0x78a5636f); + RNDr(S, W, 58, 0x84c87814); + RNDr(S, W, 59, 0x8cc70208); + RNDr(S, W, 60, 0x90befffa); + RNDr(S, W, 61, 0xa4506ceb); + RNDr(S, W, 62, 0xbef9a3f7); + RNDr(S, W, 63, 0xc67178f2); + + /* 4. Mix local working variables into global state */ + for (i = 0; i < 8; i++) + state[i] += S[i]; + + /* Clean the stack. */ + memset(W, 0, 256); + memset(S, 0, 32); + t0 = t1 = 0; +} + +static unsigned char PAD[64] = { + 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 +}; + +/* SHA-256 initialization. Begins a SHA-256 operation. */ +static void +SHA256_Init(SHA256_CTX * ctx) +{ + + /* Zero bits processed so far */ + ctx->count[0] = ctx->count[1] = 0; + + /* Magic initialization constants */ + ctx->state[0] = 0x6A09E667; + ctx->state[1] = 0xBB67AE85; + ctx->state[2] = 0x3C6EF372; + ctx->state[3] = 0xA54FF53A; + ctx->state[4] = 0x510E527F; + ctx->state[5] = 0x9B05688C; + ctx->state[6] = 0x1F83D9AB; + ctx->state[7] = 0x5BE0CD19; +} + +/* Add bytes into the hash */ +static void +SHA256_Update(SHA256_CTX * ctx, const void *in, size_t len) +{ + uint32_t bitlen[2]; + uint32_t r; + const unsigned char *src = in; + + /* Number of bytes left in the buffer from previous updates */ + r = (ctx->count[1] >> 3) & 0x3f; + + /* Convert the length into a number of bits */ + bitlen[1] = ((uint32_t)len) << 3; + bitlen[0] = (uint32_t)(len >> 29); + + /* Update number of bits */ + if ((ctx->count[1] += bitlen[1]) < bitlen[1]) + ctx->count[0]++; + ctx->count[0] += bitlen[0]; + + /* Handle the case where we don't need to perform any transforms */ + if (len < 64 - r) { + memcpy(&ctx->buf[r], src, len); + return; + } + + /* Finish the current block */ + memcpy(&ctx->buf[r], src, 64 - r); + SHA256_Transform(ctx->state, ctx->buf); + src += 64 - r; + len -= 64 - r; + + /* Perform complete blocks */ + while (len >= 64) { + SHA256_Transform(ctx->state, src); + src += 64; + len -= 64; + } + + /* Copy left over data into buffer */ + memcpy(ctx->buf, src, len); +} + +/* Add padding and terminating bit-count. */ +static void +SHA256_Pad(SHA256_CTX * ctx) +{ + unsigned char len[8]; + uint32_t r, plen; + + /* + * Convert length to a vector of bytes -- we do this now rather + * than later because the length will change after we pad. + */ + be32enc_vect(len, ctx->count, 8); + + /* Add 1--64 bytes so that the resulting length is 56 mod 64 */ + r = (ctx->count[1] >> 3) & 0x3f; + plen = (r < 56) ? (56 - r) : (120 - r); + SHA256_Update(ctx, PAD, (size_t)plen); + + /* Add the terminating bit-count */ + SHA256_Update(ctx, len, 8); +} + +/* + * SHA-256 finalization. Pads the input data, exports the hash value, + * and clears the context state. + */ +static void +SHA256_Final(unsigned char digest[32], SHA256_CTX * ctx) +{ + + /* Add padding */ + SHA256_Pad(ctx); + + /* Write the hash */ + be32enc_vect(digest, ctx->state, 32); + + /* Clear the context state */ + memset((void *)ctx, 0, sizeof(*ctx)); +} + +/* Initialize an HMAC-SHA256 operation with the given key. */ +static void +HMAC_SHA256_Init(HMAC_SHA256_CTX * ctx, const void * _K, size_t Klen) +{ + unsigned char pad[64]; + unsigned char khash[32]; + const unsigned char * K = _K; + size_t i; + + /* If Klen > 64, the key is really SHA256(K). */ + if (Klen > 64) { + SHA256_Init(&ctx->ictx); + SHA256_Update(&ctx->ictx, K, Klen); + SHA256_Final(khash, &ctx->ictx); + K = khash; + Klen = 32; + } + + /* Inner SHA256 operation is SHA256(K xor [block of 0x36] || data). */ + SHA256_Init(&ctx->ictx); + memset(pad, 0x36, 64); + for (i = 0; i < Klen; i++) + pad[i] ^= K[i]; + SHA256_Update(&ctx->ictx, pad, 64); + + /* Outer SHA256 operation is SHA256(K xor [block of 0x5c] || hash). */ + SHA256_Init(&ctx->octx); + memset(pad, 0x5c, 64); + for (i = 0; i < Klen; i++) + pad[i] ^= K[i]; + SHA256_Update(&ctx->octx, pad, 64); + + /* Clean the stack. */ + memset(khash, 0, 32); +} + +/* Add bytes to the HMAC-SHA256 operation. */ +static void +HMAC_SHA256_Update(HMAC_SHA256_CTX * ctx, const void *in, size_t len) +{ + + /* Feed data to the inner SHA256 operation. */ + SHA256_Update(&ctx->ictx, in, len); +} + +/* Finish an HMAC-SHA256 operation. */ +static void +HMAC_SHA256_Final(unsigned char digest[32], HMAC_SHA256_CTX * ctx) +{ + unsigned char ihash[32]; + + /* Finish the inner SHA256 operation. */ + SHA256_Final(ihash, &ctx->ictx); + + /* Feed the inner hash to the outer SHA256 operation. */ + SHA256_Update(&ctx->octx, ihash, 32); + + /* Finish the outer SHA256 operation. */ + SHA256_Final(digest, &ctx->octx); + + /* Clean the stack. */ + memset(ihash, 0, 32); +} + +/** + * PBKDF2_SHA256(passwd, passwdlen, salt, saltlen, c, buf, dkLen): + * Compute PBKDF2(passwd, salt, c, dkLen) using HMAC-SHA256 as the PRF, and + * write the output to buf. The value dkLen must be at most 32 * (2^32 - 1). + */ +static void +PBKDF2_SHA256(const uint8_t * passwd, size_t passwdlen, const uint8_t * salt, + size_t saltlen, uint64_t c, uint8_t * buf, size_t dkLen) +{ + HMAC_SHA256_CTX PShctx, hctx; + size_t i; + uint8_t ivec[4]; + uint8_t U[32]; + uint8_t T[32]; + uint64_t j; + int k; + size_t clen; + + /* Compute HMAC state after processing P and S. */ + HMAC_SHA256_Init(&PShctx, passwd, passwdlen); + HMAC_SHA256_Update(&PShctx, salt, saltlen); + + /* Iterate through the blocks. */ + for (i = 0; i * 32 < dkLen; i++) { + /* Generate INT(i + 1). */ + be32enc(ivec, (uint32_t)(i + 1)); + + /* Compute U_1 = PRF(P, S || INT(i)). */ + memcpy(&hctx, &PShctx, sizeof(HMAC_SHA256_CTX)); + HMAC_SHA256_Update(&hctx, ivec, 4); + HMAC_SHA256_Final(U, &hctx); + + /* T_i = U_1 ... */ + memcpy(T, U, 32); + + for (j = 2; j <= c; j++) { + /* Compute U_j. */ + HMAC_SHA256_Init(&hctx, passwd, passwdlen); + HMAC_SHA256_Update(&hctx, U, 32); + HMAC_SHA256_Final(U, &hctx); + + /* ... xor U_j ... */ + for (k = 0; k < 32; k++) + T[k] ^= U[k]; + } + + /* Copy as many bytes as necessary into buf. */ + clen = dkLen - i * 32; + if (clen > 32) + clen = 32; + memcpy(&buf[i * 32], T, clen); + } + + /* Clean PShctx, since we never called _Final on it. */ + memset(&PShctx, 0, sizeof(HMAC_SHA256_CTX)); +} + + +static void blkcpy(void *, void *, size_t); +static void blkxor(void *, void *, size_t); +static void salsa20_8(uint32_t[16]); +static void blockmix_salsa8(uint32_t *, uint32_t *, uint32_t *, size_t); +static uint64_t integerify(void *, size_t); +static void smix(uint8_t *, size_t, uint64_t, uint32_t *, uint32_t *); + +static void +blkcpy(void * dest, void * src, size_t len) +{ + size_t * D = dest; + size_t * S = src; + size_t L = len / sizeof(size_t); + size_t i; + + for (i = 0; i < L; i++) + D[i] = S[i]; +} + +static void +blkxor(void * dest, void * src, size_t len) +{ + size_t * D = dest; + size_t * S = src; + size_t L = len / sizeof(size_t); + size_t i; + + for (i = 0; i < L; i++) + D[i] ^= S[i]; +} + +/** + * salsa20_8(B): + * Apply the salsa20/8 core to the provided block. + */ +static void +salsa20_8(uint32_t B[16]) +{ + uint32_t x[16]; + size_t i; + + blkcpy(x, B, 64); + for (i = 0; i < 8; i += 2) { +#define R(a,b) (((a) << (b)) | ((a) >> (32 - (b)))) + /* Operate on columns. */ + x[ 4] ^= R(x[ 0]+x[12], 7); x[ 8] ^= R(x[ 4]+x[ 0], 9); + x[12] ^= R(x[ 8]+x[ 4],13); x[ 0] ^= R(x[12]+x[ 8],18); + + x[ 9] ^= R(x[ 5]+x[ 1], 7); x[13] ^= R(x[ 9]+x[ 5], 9); + x[ 1] ^= R(x[13]+x[ 9],13); x[ 5] ^= R(x[ 1]+x[13],18); + + x[14] ^= R(x[10]+x[ 6], 7); x[ 2] ^= R(x[14]+x[10], 9); + x[ 6] ^= R(x[ 2]+x[14],13); x[10] ^= R(x[ 6]+x[ 2],18); + + x[ 3] ^= R(x[15]+x[11], 7); x[ 7] ^= R(x[ 3]+x[15], 9); + x[11] ^= R(x[ 7]+x[ 3],13); x[15] ^= R(x[11]+x[ 7],18); + + /* Operate on rows. */ + x[ 1] ^= R(x[ 0]+x[ 3], 7); x[ 2] ^= R(x[ 1]+x[ 0], 9); + x[ 3] ^= R(x[ 2]+x[ 1],13); x[ 0] ^= R(x[ 3]+x[ 2],18); + + x[ 6] ^= R(x[ 5]+x[ 4], 7); x[ 7] ^= R(x[ 6]+x[ 5], 9); + x[ 4] ^= R(x[ 7]+x[ 6],13); x[ 5] ^= R(x[ 4]+x[ 7],18); + + x[11] ^= R(x[10]+x[ 9], 7); x[ 8] ^= R(x[11]+x[10], 9); + x[ 9] ^= R(x[ 8]+x[11],13); x[10] ^= R(x[ 9]+x[ 8],18); + + x[12] ^= R(x[15]+x[14], 7); x[13] ^= R(x[12]+x[15], 9); + x[14] ^= R(x[13]+x[12],13); x[15] ^= R(x[14]+x[13],18); +#undef R + } + for (i = 0; i < 16; i++) + B[i] += x[i]; +} + +/** + * blockmix_salsa8(Bin, Bout, X, r): + * Compute Bout = BlockMix_{salsa20/8, r}(Bin). The input Bin must be 128r + * bytes in length; the output Bout must also be the same size. The + * temporary space X must be 64 bytes. + */ +static void +blockmix_salsa8(uint32_t * Bin, uint32_t * Bout, uint32_t * X, size_t r) +{ + size_t i; + + /* 1: X <-- B_{2r - 1} */ + blkcpy(X, &Bin[(2 * r - 1) * 16], 64); + + /* 2: for i = 0 to 2r - 1 do */ + for (i = 0; i < 2 * r; i += 2) { + /* 3: X <-- H(X \xor B_i) */ + blkxor(X, &Bin[i * 16], 64); + salsa20_8(X); + + /* 4: Y_i <-- X */ + /* 6: B' <-- (Y_0, Y_2 ... Y_{2r-2}, Y_1, Y_3 ... Y_{2r-1}) */ + blkcpy(&Bout[i * 8], X, 64); + + /* 3: X <-- H(X \xor B_i) */ + blkxor(X, &Bin[i * 16 + 16], 64); + salsa20_8(X); + + /* 4: Y_i <-- X */ + /* 6: B' <-- (Y_0, Y_2 ... Y_{2r-2}, Y_1, Y_3 ... Y_{2r-1}) */ + blkcpy(&Bout[i * 8 + r * 16], X, 64); + } +} + +/** + * integerify(B, r): + * Return the result of parsing B_{2r-1} as a little-endian integer. + */ +static uint64_t +integerify(void * B, size_t r) +{ + uint32_t * X = (void *)((uintptr_t)(B) + (2 * r - 1) * 64); + + return (((uint64_t)(X[1]) << 32) + X[0]); +} + +/** + * smix(B, r, N, V, XY): + * Compute B = SMix_r(B, N). The input B must be 128r bytes in length; + * the temporary storage V must be 128rN bytes in length; the temporary + * storage XY must be 256r + 64 bytes in length. The value N must be a + * power of 2 greater than 1. The arrays B, V, and XY must be aligned to a + * multiple of 64 bytes. + */ +static void +smix(uint8_t * B, size_t r, uint64_t N, uint32_t * V, uint32_t * XY) +{ + uint32_t * X = XY; + uint32_t * Y = &XY[32 * r]; + uint32_t * Z = &XY[64 * r]; + uint64_t i; + uint64_t j; + size_t k; + + /* 1: X <-- B */ + for (k = 0; k < 32 * r; k++) + X[k] = le32dec(&B[4 * k]); + + /* 2: for i = 0 to N - 1 do */ + for (i = 0; i < N; i += 2) { + /* 3: V_i <-- X */ + blkcpy(&V[i * (32 * r)], X, 128 * r); + + /* 4: X <-- H(X) */ + blockmix_salsa8(X, Y, Z, r); + + /* 3: V_i <-- X */ + blkcpy(&V[(i + 1) * (32 * r)], Y, 128 * r); + + /* 4: X <-- H(X) */ + blockmix_salsa8(Y, X, Z, r); + } + + /* 6: for i = 0 to N - 1 do */ + for (i = 0; i < N; i += 2) { + /* 7: j <-- Integerify(X) mod N */ + j = integerify(X, r) & (N - 1); + + /* 8: X <-- H(X \xor V_j) */ + blkxor(X, &V[j * (32 * r)], 128 * r); + blockmix_salsa8(X, Y, Z, r); + + /* 7: j <-- Integerify(X) mod N */ + j = integerify(Y, r) & (N - 1); + + /* 8: X <-- H(X \xor V_j) */ + blkxor(Y, &V[j * (32 * r)], 128 * r); + blockmix_salsa8(Y, X, Z, r); + } + + /* 10: B' <-- X */ + for (k = 0; k < 32 * r; k++) + le32enc(&B[4 * k], X[k]); +} + +/* cpu and memory intensive function to transform a 80 byte buffer into a 32 byte output + scratchpad size needs to be at least 63 + (128 * r * p) + (256 * r + 64) + (128 * r * N) bytes + */ +void scrypt_1024_1_1_256_sp(const char* input, char* output, char* scratchpad) +{ + uint8_t * B; + uint32_t * V; + uint32_t * XY; + uint32_t i; + + const uint32_t N = 1024; + const uint32_t r = 1; + const uint32_t p = 1; + + B = (uint8_t *)(((uintptr_t)(scratchpad) + 63) & ~ (uintptr_t)(63)); + XY = (uint32_t *)(B + (128 * r * p)); + V = (uint32_t *)(B + (128 * r * p) + (256 * r + 64)); + + /* 1: (B_0 ... B_{p-1}) <-- PBKDF2(P, S, 1, p * MFLen) */ + PBKDF2_SHA256((const uint8_t*)input, 80, (const uint8_t*)input, 80, 1, B, p * 128 * r); + + /* 2: for i = 0 to p - 1 do */ + for (i = 0; i < p; i++) { + /* 3: B_i <-- MF(B_i, N) */ + smix(&B[i * 128 * r], r, N, V, XY); + } + + /* 5: DK <-- PBKDF2(P, B, 1, dkLen) */ + PBKDF2_SHA256((const uint8_t*)input, 80, B, p * 128 * r, 1, (uint8_t*)output, 32); +} + +void scrypt_1024_1_1_256(const char* input, char* output) +{ + char scratchpad[scrypt_scratchpad_size]; + scrypt_1024_1_1_256_sp(input, output, scratchpad); +} + diff --git a/p2pool/litecoin/scrypt.h b/p2pool/litecoin/scrypt.h new file mode 100644 index 0000000..694158d --- /dev/null +++ b/p2pool/litecoin/scrypt.h @@ -0,0 +1,16 @@ +#ifndef SCRYPT_H +#define SCRYPT_H + +#ifdef __cplusplus +extern "C" { +#endif + +void scrypt_1024_1_1_256(const char* input, char* output); +void scrypt_1024_1_1_256_sp(const char* input, char* output, char* scratchpad); +const int scrypt_scratchpad_size = 131583; + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/p2pool/litecoin/scryptmodule.c b/p2pool/litecoin/scryptmodule.c new file mode 100644 index 0000000..d4f3df4 --- /dev/null +++ b/p2pool/litecoin/scryptmodule.c @@ -0,0 +1,26 @@ +#include + +//#include "scrypt.h" + +static PyObject *scrypt_getpowhash(PyObject *self, PyObject *args) +{ + PyStringObject *input; + if (!PyArg_ParseTuple(args, "S", &input)) + return NULL; + Py_INCREF(input); + uint8_t *output = PyMem_Malloc(32); + scrypt_1024_1_1_256((uint8_t *)PyString_AsString((PyObject*) input), output); + Py_DECREF(input); + PyObject *value = Py_BuildValue("s#", output, 32); + PyMem_Free(output); + return value; +} + +static PyMethodDef ScryptMethods[] = { + { "getPoWHash", scrypt_getpowhash, METH_VARARGS, "Returns the proof of work hash using scrypt" }, + { NULL, NULL, 0, NULL } +}; + +PyMODINIT_FUNC initltc_scrypt(void) { + (void) Py_InitModule("ltc_scrypt", ScryptMethods); +} \ No newline at end of file diff --git a/p2pool/litecoin/setup.py b/p2pool/litecoin/setup.py new file mode 100644 index 0000000..8304844 --- /dev/null +++ b/p2pool/litecoin/setup.py @@ -0,0 +1,11 @@ +from distutils.core import setup, Extension + +ltc_scrypt_module = Extension('ltc_scrypt', + sources = ['scryptmodule.c', + 'scrypt.c'], + include_dirs=['.']) + +setup (name = 'ltc_scrypt', + version = '1.0', + description = 'Bindings for scrypt proof of work used by Litecoin', + ext_modules = [ltc_scrypt_module]) diff --git a/p2pool/main.py b/p2pool/main.py index bf2ce33..feeefda 100644 --- a/p2pool/main.py +++ b/p2pool/main.py @@ -468,7 +468,7 @@ def main(args): doa_shares = set() times = {} - def got_response(data, user): + def got_response(data, user, net): try: # match up with transactions header = bitcoin.getwork.decode_data(data) @@ -478,12 +478,22 @@ def main(args): return False block = dict(header=header, txs=transactions) hash_ = bitcoin.data.block_header_type.hash256(block['header']) - if hash_ <= block['header']['target'] or p2pool_init.DEBUG: + pow = hash_; + + # use scrypt for Litecoin + if (getattr(net, 'BITCOIN_POW_SCRYPT', False)): + pow = bitcoin.data.block_header_type.scrypt(block['header']); +# print 'LTC: hash256 %x' % hash_ +# print 'LTC: scrypt %x' % pow +# print 'LTC: target %x' % block['header']['target'] +# print 'LTC: starget %x' % p2pool.coinbase_type.unpack(transactions[0]['tx_ins'][0]['script'])['share_data']['target'] + + if pow <= block['header']['target'] or p2pool_init.DEBUG: if factory.conn.value is not None: factory.conn.value.send_block(block=block) else: print 'No bitcoind connection! Erp!' - if hash_ <= block['header']['target']: + if pow <= block['header']['target']: print print 'GOT BLOCK! Passing to bitcoind! bitcoin: %x' % (hash_,) print @@ -509,10 +519,10 @@ def main(args): except: log.err(None, 'Error while processing merged mining POW:') target = p2pool.coinbase_type.unpack(transactions[0]['tx_ins'][0]['script'])['share_data']['target'] - if hash_ > target: - print 'Worker submitted share with hash > target:\nhash : %x\ntarget: %x' % (hash_, target) + if pow > target: + print 'Worker submitted share with hash > target:\nhash : %x\ntarget: %x' % (pow, target) return False - share = p2pool.Share.from_block(block) + share = p2pool.Share.from_block(block, net) my_shares.add(share.hash) if share.previous_hash != current_work.value['best_share_hash']: doa_shares.add(share.hash) diff --git a/p2pool/p2p.py b/p2pool/p2p.py index f787228..071ac04 100644 --- a/p2pool/p2p.py +++ b/p2pool/p2p.py @@ -212,12 +212,16 @@ class Protocol(bitcoin_p2p.BaseProtocol): def handle_share1as(self, share1as): shares = [] for share1a in share1as: - hash_ = bitcoin_data.block_header_type.hash256(share1a['header']) + # use scrypt for Litecoin + if (getattr(self.node.net, 'BITCOIN_POW_SCRYPT', False)): + hash_ = bitcoin_data.block_header_type.scrypt(share1a['header']); + else: + hash_ = bitcoin_data.block_header_type.hash256(share1a['header']) if hash_ <= share1a['header']['target']: print 'Dropping peer %s:%i due to invalid share' % self.addr self.transport.loseConnection() return - share = p2pool_data.Share.from_share1a(share1a) + share = p2pool_data.Share.from_share1a(share1a, self.node.net) share.peer = self # XXX shares.append(share) self.node.handle_shares(shares, self) @@ -228,12 +232,16 @@ class Protocol(bitcoin_p2p.BaseProtocol): def handle_share1bs(self, share1bs): shares = [] for share1b in share1bs: - hash_ = bitcoin_data.block_header_type.hash256(share1b['header']) + # use scrypt for Litecoin + if (getattr(self.node.net, 'BITCOIN_POW_SCRYPT', False)): + hash_ = bitcoin_data.block_header_type.scrypt(share1b['header']); + else: + hash_ = bitcoin_data.block_header_type.hash256(share1b['header']) if not hash_ <= share1b['header']['target']: print 'Dropping peer %s:%i due to invalid share' % self.addr self.transport.loseConnection() return - share = p2pool_data.Share.from_share1b(share1b) + share = p2pool_data.Share.from_share1b(share1b, self.node.net) share.peer = self # XXX shares.append(share) self.node.handle_shares(shares, self) diff --git a/p2pool/worker_interface.py b/p2pool/worker_interface.py index 8d03370..d8807bd 100644 --- a/p2pool/worker_interface.py +++ b/p2pool/worker_interface.py @@ -118,7 +118,7 @@ class WorkerInterface(jsonrpc.Server): request.setHeader('X-Roll-NTime', 'expire=60') if data is not None: - defer.returnValue(self.response_callback(data, get_username(request))) + defer.returnValue(self.response_callback(data, get_username(request), self.net)) defer.returnValue((yield self.getwork(request))) rpc_getwork.takes_request = True