X-Git-Url: http://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Fcrypto%2Fshachain%2Ftools%2Fshachain48.c;fp=ccan%2Fcrypto%2Fshachain%2Ftools%2Fshachain48.c;h=5cc910909ba1d33a9f151701a76134d9d328a0a2;hb=4bb69fe6d568f84bd682cf6f86bae168313deb91;hp=0000000000000000000000000000000000000000;hpb=d07f742c5925b97ed558eb07aae285616f5df823;p=ccan

diff --git a/ccan/crypto/shachain/tools/shachain48.c b/ccan/crypto/shachain/tools/shachain48.c
new file mode 100644
index 00000000..5cc91090
--- /dev/null
+++ b/ccan/crypto/shachain/tools/shachain48.c
@@ -0,0 +1,58 @@
+#include <ccan/crypto/shachain/shachain.h>
+#include <ccan/str/hex/hex.h>
+#include <ccan/str/str.h>
+#include <ccan/err/err.h>
+#include <ccan/rbuf/rbuf.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int main(int argc, char *argv[])
+{
+	if (argc == 2 && streq(argv[1], "--store")) {
+		struct shachain s;
+		struct rbuf rbuf;
+		size_t size = rbuf_good_size(STDIN_FILENO);
+		char *p;
+
+		shachain_init(&s);
+		rbuf_init(&rbuf, STDIN_FILENO, malloc(size), size);
+
+		while ((p = rbuf_read_str(&rbuf, '\n', realloc)) != NULL) {
+			struct sha256 hash;
+			unsigned long long idx;
+
+			if (strstarts(p, "0x"))
+				p += 2;
+			if (!hex_decode(p, 64, &hash, sizeof(hash)))
+				errx(2, "%.*s is not 64 chars of hex", 64, p);
+			p += 64;
+			p += strspn(p, " \t");
+			idx = strtoull(p, NULL, 0);
+			if (shachain_add_hash(&s, idx, &hash))
+				printf("OK\n");
+			else
+				printf("ERROR\n");
+		}
+	} else if (argc == 3) {
+		struct sha256 seed, hash;
+		const char *p;
+		unsigned long long idx;
+		char hex[65];
+
+		if (strstarts(argv[1], "0x"))
+			p = argv[1] + 2;
+		else
+			p = argv[1];
+		idx = strtoull(argv[2], NULL, 0);
+
+		if (!hex_decode(p, 64, &seed, sizeof(seed)))
+			errx(2, "%s is not 64 chars of hex", p);
+
+		shachain_from_seed(&seed, idx, &hash);
+		hex_encode(&hash, sizeof(hash), hex, sizeof(hex));
+		printf("0x%s\n", hex);
+	} else
+		errx(1, "Usage: shachain --store OR shachain <seed> <index>");
+	return 0;
+}