[WIP] add Groestl support for c-lightning

bitcoin/Makefile

@@ -5,12 +5,14 @@ BITCOIN_SRC :=					\
 	bitcoin/block.c				\
 	bitcoin/chainparams.c			\
 	bitcoin/locktime.c			\
+	bitcoin/groestl.c			\
 	bitcoin/privkey.c			\
 	bitcoin/pubkey.c			\
 	bitcoin/pullpush.c			\
 	bitcoin/script.c			\
 	bitcoin/shadouble.c			\
 	bitcoin/short_channel_id.c		\
+	bitcoin/sph_groestl.c		\
 	bitcoin/signature.c			\
 	bitcoin/tx.c				\
 	bitcoin/varint.c
@@ -22,6 +24,7 @@ BITCOIN_HEADERS := bitcoin/address.h		\
 	bitcoin/block.h				\
 	bitcoin/chainparams.h			\
 	bitcoin/feerate.h			\
+	bitcoin/groestl.h		\
 	bitcoin/locktime.h			\
 	bitcoin/preimage.h			\
 	bitcoin/privkey.h			\
@@ -31,6 +34,8 @@ BITCOIN_HEADERS := bitcoin/address.h		\
 	bitcoin/shadouble.h			\
 	bitcoin/short_channel_id.h		\
 	bitcoin/signature.h			\
+	bitcoin/sph_groestl.h		\
+	bitcoin/sph_types.h			\
 	bitcoin/tx.h				\
 	bitcoin/varint.h
 

bitcoin/base58.c

@@ -3,26 +3,217 @@
 // Copyright (c) 2009-2012 The Bitcoin Developers
 // Distributed under the MIT/X11 software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
+/*
+ * Copyright 2012-2014 Luke Dashjr
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the standard MIT license.  See COPYING for more details.
+ */
+
 #include "address.h"
 #include "base58.h"
 #include "privkey.h"
 #include "pubkey.h"
 #include "shadouble.h"
+#include <arpa/inet.h>
 #include <assert.h>
+#include <bitcoin/base58.h>
+#include <bitcoin/chainparams.h>
+#include <bitcoin/groestl.h>
 #include <ccan/build_assert/build_assert.h>
 #include <ccan/tal/str/str.h>
 #include <common/utils.h>
-#include <libbase58.h>
 #include <string.h>
 
+bool (*b58_sha256_impl)(void *, const void *, size_t) = NULL;
+
+static const int8_t b58digits_map[] = {
+	-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,
+	-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,
+	-1,-1,-1,-1,-1,-1,-1,-1, -1,-1,-1,-1,-1,-1,-1,-1,
+	-1, 0, 1, 2, 3, 4, 5, 6,  7, 8,-1,-1,-1,-1,-1,-1,
+	-1, 9,10,11,12,13,14,15, 16,-1,17,18,19,20,21,-1,
+	22,23,24,25,26,27,28,29, 30,31,32,-1,-1,-1,-1,-1,
+	-1,33,34,35,36,37,38,39, 40,41,42,43,-1,44,45,46,
+	47,48,49,50,51,52,53,54, 55,56,57,-1,-1,-1,-1,-1,
+};
+
+bool b58tobin(void *bin, size_t *binszp, const char *b58, size_t b58sz)
+{
+	size_t binsz = *binszp;
+	const unsigned char *b58u = (void*)b58;
+	unsigned char *binu = bin;
+	size_t outisz = (binsz + 3) / 4;
+	uint32_t outi[outisz];
+	uint64_t t;
+	uint32_t c;
+	size_t i, j;
+	uint8_t bytesleft = binsz % 4;
+	uint32_t zeromask = bytesleft ? (0xffffffff << (bytesleft * 8)) : 0;
+	unsigned zerocount = 0;
+
+	if (!b58sz)
+		b58sz = strlen(b58);
+
+	memset(outi, 0, outisz * sizeof(*outi));
+
+	// Leading zeros, just count
+	for (i = 0; i < b58sz && b58u[i] == '1'; ++i)
+		++zerocount;
+
+	for ( ; i < b58sz; ++i)
+	{
+		if (b58u[i] & 0x80)
+			// High-bit set on invalid digit
+			return false;
+		if (b58digits_map[b58u[i]] == -1)
+			// Invalid base58 digit
+			return false;
+		c = (unsigned)b58digits_map[b58u[i]];
+		for (j = outisz; j--; )
+		{
+			t = ((uint64_t)outi[j]) * 58 + c;
+			c = (t & 0x3f00000000) >> 32;
+			outi[j] = t & 0xffffffff;
+		}
+		if (c)
+			// Output number too big (carry to the next int32)
+			return false;
+		if (outi[0] & zeromask)
+			// Output number too big (last int32 filled too far)
+			return false;
+	}
+
+	j = 0;
+	switch (bytesleft) {
+		case 3:
+			*(binu++) = (outi[0] &   0xff0000) >> 16;
+		case 2:
+			*(binu++) = (outi[0] &     0xff00) >>  8;
+		case 1:
+			*(binu++) = (outi[0] &       0xff);
+			++j;
+		default:
+			break;
+	}
+
+	for (; j < outisz; ++j)
+	{
+		*(binu++) = (outi[j] >> 0x18) & 0xff;
+		*(binu++) = (outi[j] >> 0x10) & 0xff;
+		*(binu++) = (outi[j] >>    8) & 0xff;
+		*(binu++) = (outi[j] >>    0) & 0xff;
+	}
+
+	// Count canonical base58 byte count
+	binu = bin;
+	for (i = 0; i < binsz; ++i)
+	{
+		if (binu[i])
+			break;
+		--*binszp;
+	}
+	*binszp += zerocount;
+
+	return true;
+}
+
+static
+bool my_dblsha256(void *hash, const void *data, size_t datasz)
+{
+		return b58_sha256_impl(hash, data, datasz);
+}
+
+int b58check(const void *bin, size_t binsz, const char *base58str, size_t b58sz)
+{
+	unsigned char buf[32];
+	const uint8_t *binc = bin;
+	unsigned i;
+	if (binsz < 4)
+		return -4;
+	if (!my_dblsha256(buf, bin, binsz - 4))
+		return -2;
+	if (memcmp(&binc[binsz - 4], buf, 4))
+		return -1;
+
+	// Check number of zeros is correct AFTER verifying checksum (to avoid possibility of accessing base58str beyond the end)
+	for (i = 0; binc[i] == '\0' && base58str[i] == '1'; ++i)
+	{}  // Just finding the end of zeros, nothing to do in loop
+	if (binc[i] == '\0' || base58str[i] == '1')
+		return -3;
+
+	return binc[0];
+}
+
+static const char b58digits_ordered[] = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";
+
+bool b58enc(char *b58, size_t *b58sz, const void *data, size_t binsz)
+{
+	const uint8_t *bin = data;
+	int carry;
+	ssize_t i, j, high, zcount = 0;
+	size_t size;
+
+	while (zcount < binsz && !bin[zcount])
+		++zcount;
+
+	size = (binsz - zcount) * 138 / 100 + 1;
+	uint8_t buf[size];
+	memset(buf, 0, size);
+
+	for (i = zcount, high = size - 1; i < binsz; ++i, high = j)
+	{
+		for (carry = bin[i], j = size - 1; (j > high) || carry; --j)
+		{
+			carry += 256 * buf[j];
+			buf[j] = carry % 58;
+			carry /= 58;
+		}
+	}
+
+	for (j = 0; j < size && !buf[j]; ++j);
+
+	if (*b58sz <= zcount + size - j)
+	{
+		*b58sz = zcount + size - j + 1;
+		return false;
+	}
+
+	if (zcount)
+		memset(b58, '1', zcount);
+	for (i = zcount; j < size; ++i, ++j)
+		b58[i] = b58digits_ordered[buf[j]];
+	b58[i] = '\0';
+	*b58sz = i + 1;
+
+	return true;
+}
+
+bool b58check_enc(char *b58c, size_t *b58c_sz, uint8_t ver, const void *data, size_t datasz)
+{
+	uint8_t buf[1 + datasz + 0x20];
+	uint8_t *hash = &buf[1 + datasz];
+
+	buf[0] = ver;
+	memcpy(&buf[1], data, datasz);
+	if (!my_dblsha256(hash, buf, datasz + 1))
+	{
+		*b58c_sz = 0;
+		return false;
+	}
+
+	return b58enc(b58c, b58c_sz, buf, 1 + datasz + 4);
+}
+
+
 static bool my_sha256(void *digest, const void *data, size_t datasz)
 {
-	sha256(digest, data, datasz);
+	groestlhash((void *)digest, (void *)data, datasz);
 	return true;
 }
 
 static char *to_base58(const tal_t *ctx, u8 version,
-		       const struct ripemd160 *rmd)
+			   const struct ripemd160 *rmd)
 {
 	char out[BASE58_ADDR_MAX_LEN + 1];
 	size_t outlen = sizeof(out);
@@ -42,7 +233,7 @@ char *bitcoin_to_base58(const tal_t *ctx, bool test_net,
 }
 
 char *p2sh_to_base58(const tal_t *ctx, bool test_net,
-		     const struct ripemd160 *p2sh)
+			 const struct ripemd160 *p2sh)
 {
 	return to_base58(ctx, test_net ? 196 : 5, p2sh);
 }
@@ -84,8 +275,8 @@ bool bitcoin_from_base58(bool *test_net,
 }
 
 bool p2sh_from_base58(bool *test_net,
-		      struct ripemd160 *p2sh,
-		      const char *base58, size_t len)
+			  struct ripemd160 *p2sh,
+			  const char *base58, size_t len)
 {
 	u8 version;
 
@@ -102,7 +293,7 @@ bool p2sh_from_base58(bool *test_net,
 }
 
 bool key_from_base58(const char *base58, size_t base58_len,
-		     bool *test_net, struct privkey *priv, struct pubkey *key)
+			 bool *test_net, struct privkey *priv, struct pubkey *key)
 {
 	// 1 byte version, 32 byte private key, 1 byte compressed, 4 byte checksum
 	u8 keybuf[1 + 32 + 1 + 4];

bitcoin/base58.h

@@ -46,4 +46,13 @@ bool key_from_base58(const char *base58, size_t base58_len,
 
 void base58_get_checksum(u8 csum[4], const u8 buf[], size_t buflen);
 
+extern bool (*b58_sha256_impl)(void *, const void *, size_t);
+
+extern bool b58tobin(void *bin, size_t *binsz, const char *b58, size_t b58sz);
+extern int b58check(const void *bin, size_t binsz, const char *b58, size_t b58sz);
+
+extern bool b58enc(char *b58, size_t *b58sz, const void *bin, size_t binsz);
+extern bool b58check_enc(char *b58c, size_t *b58c_sz, uint8_t ver, const void *data, size_t datasz);
+
+
 #endif /* LIGHTNING_BITCOIN_BASE58_H */