X-Git-Url: http://git.ozlabs.org/?p=ccan;a=blobdiff_plain;f=ccan%2Fcrypto%2Fshachain%2F_info;h=b4f8d81823d0086fb61b54cba55f2a7a32c030ad;hp=7cbf02da8f5cb8e5622f43c7344afd13b27fa156;hb=7d1f0c73e4d321561abb74f82c8be97f10d69836;hpb=fc6655ed3c4840a5d4d669ad3c44e2ffe1019173

diff --git a/ccan/crypto/shachain/_info b/ccan/crypto/shachain/_info
index 7cbf02da..b4f8d818 100644
--- a/ccan/crypto/shachain/_info
+++ b/ccan/crypto/shachain/_info
@@ -12,6 +12,36 @@
  *
  * License: BSD-MIT
  * Author: Rusty Russell <rusty@rustcorp.com.au>
+ *
+ * Example:
+ *
+ * #include <ccan/crypto/shachain/shachain.h>
+ * #include <ccan/err/err.h>
+ * #include <stdio.h>
+ * #include <stdlib.h>
+ * #include <string.h>
+ *
+ * int main(int argc, char *argv[])
+ * {
+ *	size_t i, j, limit = 10;
+ *	struct sha256 seed;
+ *
+ *	if (argc < 2)
+ *		errx(1, "Usage: %s <passphrase> [<num-to-generate>]", argv[0]);
+ *	sha256(&seed, argv[1], strlen(argv[1]));
+ *	if (argv[2])
+ *		limit = atol(argv[2]);
+ *
+ *	for (i = 0; i < limit; i++) {
+ *		struct sha256 v;
+ *		shachain_from_seed(&seed, i, &v);
+ *		printf("%zu: ", i);
+ *		for (j = 0; j < sizeof(v.u.u8); j++)
+ *			printf("%02x", v.u.u8[j]);
+ *		printf("\n");
+ *	}
+ *	return 0;
+ * }
  */
 int main(int argc, char *argv[])
 {