thirdparty_base58: Merge in base58.c from libblkmaker

src/thirdparty_base58.c

@@ -18,6 +18,55 @@
 
 #include "libbase58.h"
 
+bool _blkmk_b58tobin(void *bin, size_t binsz, const char *b58, size_t b58sz) {
+	return b58tobin(bin, &binsz, b58, b58sz);
+}
+
+int _blkmk_b58check(void *bin, size_t binsz, const char *base58str) {
+	if (!b58_sha256_impl)
+		b58_sha256_impl = blkmk_sha256_impl;
+	return b58check(bin, binsz, base58str, 34);
+}
+
+size_t blkmk_address_to_script(void *out, size_t outsz, const char *addr) {
+	unsigned char addrbin[25];
+	unsigned char *cout = out;
+	const size_t b58sz = strlen(addr);
+	int addrver;
+	size_t rv;
+	
+	rv = sizeof(addrbin);
+	if (!b58_sha256_impl)
+		b58_sha256_impl = blkmk_sha256_impl;
+	if (!b58tobin(addrbin, &rv, addr, b58sz))
+		return 0;
+	addrver = b58check(addrbin, sizeof(addrbin), addr, b58sz);
+	switch (addrver) {
+		case   0:  // Bitcoin pubkey hash
+		case 111:  // Testnet pubkey hash
+			if (outsz < (rv = 25))
+				return rv;
+			cout[ 0] = 0x76;  // OP_DUP
+			cout[ 1] = 0xa9;  // OP_HASH160
+			cout[ 2] = 0x14;  // push 20 bytes
+			memcpy(&cout[3], &addrbin[1], 20);
+			cout[23] = 0x88;  // OP_EQUALVERIFY
+			cout[24] = 0xac;  // OP_CHECKSIG
+			return rv;
+		case   5:  // Bitcoin script hash
+		case 196:  // Testnet script hash
+			if (outsz < (rv = 23))
+				return rv;
+			cout[ 0] = 0xa9;  // OP_HASH160
+			cout[ 1] = 0x14;  // push 20 bytes
+			memcpy(&cout[2], &addrbin[1], 20);
+			cout[22] = 0x87;  // OP_EQUAL
+			return rv;
+		default:
+			return 0;
+	}
+}
+
 bool (*b58_sha256_impl)(void *, const void *, size_t) = NULL;
 
 static const int8_t b58digits_map[] = {

src/thirdparty_base58.h

@@ -8,6 +8,8 @@
 extern "C" {
 #endif
 
+extern size_t blkmk_address_to_script(void *out, size_t outsz, const char *addr);
+
 extern bool (*b58_sha256_impl)(void *, const void *, size_t);
 
 extern bool b58tobin(void *bin, size_t *binsz, const char *b58, size_t b58sz);