X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fcrypto%2Fshachain%2F_info;fp=ccan%2Fcrypto%2Fshachain%2F_info;h=7cbf02da8f5cb8e5622f43c7344afd13b27fa156;hp=0000000000000000000000000000000000000000;hb=fc6655ed3c4840a5d4d669ad3c44e2ffe1019173;hpb=0d73f8ebb66d2613ecc0b87c6e608de59be110f6

diff --git a/ccan/crypto/shachain/_info b/ccan/crypto/shachain/_info
new file mode 100644
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+++ b/ccan/crypto/shachain/_info
@@ -0,0 +1,29 @@
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+
+/**
+ * crypto/shachain - compactly-representable chain of 256-bit numbers.
+ *
+ * This code produces a practically infinite (2^64) chain of 256-bit numbers
+ * from a single number, such that you can't derive element N from any element
+ * less than N, but can efficiently derive element N from a limited number
+ * of elements >= N.
+ *
+ * License: BSD-MIT
+ * Author: Rusty Russell <rusty@rustcorp.com.au>
+ */
+int main(int argc, char *argv[])
+{
+	/* Expect exactly one argument */
+	if (argc != 2)
+		return 1;
+
+	if (strcmp(argv[1], "depends") == 0) {
+		printf("ccan/ilog\n");
+		printf("ccan/crypto/sha256\n");
+		return 0;
+	}
+
+	return 1;
+}