Command line tool "base58"

.gitignore

@@ -19,3 +19,4 @@ Makefile.in
 .libs
 ii
 *.tar*
+base58

Makefile.am

@@ -15,3 +15,8 @@ pkgconfig_DATA = libbase58.pc
 
 dist_noinst_SCRIPTS = autogen.sh
 dist_doc_DATA = README
+
+bin_PROGRAMS = base58
+base58_SOURCES = clitool.c
+base58_CFLAGS = $(LIBGCRYPT_CFLAGS)
+base58_LDADD = libbase58.la $(LIBGCRYPT_LIBS)

clitool.c

@@ -0,0 +1,98 @@
+#include <ctype.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include <gcrypt.h>
+
+#include "base58.h"
+
+static
+bool my_sha256(void *digest, const void *data, size_t datasz)
+{
+	gcry_md_hash_buffer(GCRY_MD_SHA256, digest, data, datasz);
+	return true;
+}
+
+static
+void usage(const char *prog)
+{
+	fprintf(stderr, "Usage: %s [-c] [-d] [data]\n", prog);
+	fprintf(stderr, "\t-c         Use base58check (default: raw base58)\n");
+	fprintf(stderr, "\t-d <size>  Decode <size> bytes\n");
+	exit(1);
+}
+
+int main(int argc, char **argv)
+{
+	bool b58c = false;
+	int decode = 0;
+	int opt;
+	while ( (opt = getopt(argc, argv, "cd:h")) != -1)
+	{
+		switch (opt)
+		{
+			case 'c':
+				b58c = true;
+				b58_sha256_impl = my_sha256;
+				break;
+			case 'd':
+				decode = atoi(optarg);
+				break;
+			default:
+				usage(argv[0]);
+		}
+	}
+	
+	size_t rt;
+	uint8_t *r;
+	if (optind >= argc)
+	{
+		rt = 0;
+		r = NULL;
+		while (!feof(stdin))
+		{
+			r = realloc(r, rt + 0x100);
+			rt += fread(&r[rt], 1, 0x100, stdin);
+		}
+		if (decode)
+			while (isspace(r[rt-1]))
+				--rt;
+	}
+	else
+	{
+		r = argv[optind];
+		rt = strlen(r);
+	}
+	
+	if (decode)
+	{
+		uint8_t bin[decode];
+		if (!b58tobin(bin, decode, r, rt))
+			return 2;
+		if (b58c)
+		{
+			int chk = b58check(bin, decode, r, rt);
+			if (chk < 0)
+				return chk;
+		}
+		if (fwrite(bin, decode, 1, stdout) != 1)
+			return 3;
+	}
+	else
+	{
+		size_t ssz = rt * 2;
+		char s[ssz];
+		bool rv;
+		if (b58c)
+			rv = rt && b58check_enc(s, &ssz, r[0], &r[1], rt-1);
+		else
+			rv = b58enc(s, &ssz, r, rt);
+		if (!rv)
+			return 2;
+		puts(s);
+	}
+}

configure.ac

@@ -25,4 +25,20 @@ AC_CONFIG_FILES([Makefile
 
 AC_CHECK_LIB([ws2_32], [strchr])
 
+AC_ARG_ENABLE([tool],
+	[AC_HELP_STRING([--disable-tool],[Compile command line base58 tool (default enabled)])],
+	[use_tool=$enableval],
+	[use_tool=auto])
+if test x$use_tool != xno; then
+	AM_PATH_LIBGCRYPT([],[
+		use_tool=yes
+	],[
+		if test x$use_tool = xyes; then
+			AC_MSG_ERROR([libgcrypt not found; use --disable-tool])
+		fi
+		use_tool=no
+	])
+fi
+AM_CONDITIONAL([USE_TOOL], [test x$use_tool = xyes])
+
 AC_OUTPUT