Add a SHA512 implementation

[ccan] / ccan / crypto / sha512 / _info

diff --git a/ccan/crypto/sha512/_info b/ccan/crypto/sha512/_info
new file mode 100644 (file)
index 0000000..aabfad2
--- /dev/null
+++ b/ccan/crypto/sha512/_info
@@ -0,0 +1,61 @@
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+
+/**
+ * crypto/sha512 - implementation of SHA-2 with 512 bit digest.
+ *
+ * This code is either a wrapper for openssl (if CCAN_CRYPTO_SHA512_USE_OPENSSL
+ * is defined) or an open-coded implementation based on Bitcoin's.
+ *
+ * License: BSD-MIT
+ * Maintainer: Rusty Russell <rusty@rustcorp.com.au>
+ *
+ * Example:
+ *     #include <ccan/crypto/sha512/sha512.h>
+ *     #include <err.h>
+ *     #include <stdio.h>
+ *     #include <string.h>
+ *
+ *     // Simple demonstration: identical strings will have the same hash, but
+ *     // two different strings will not.
+ *     int main(int argc, char *argv[])
+ *     {
+ *             struct sha512 hash1, hash2;
+ *
+ *             if (argc != 3)
+ *                     errx(1, "Usage: %s <string1> <string2>", argv[0]);
+ *
+ *             sha512(&hash1, argv[1], strlen(argv[1]));
+ *             sha512(&hash2, argv[2], strlen(argv[2]));
+ *             printf("Hash is %s\n", memcmp(&hash1, &hash2, sizeof(hash1))
+ *                     ? "different" : "same");
+ *             return 0;
+ *     }
+ */
+int main(int argc, char *argv[])
+{
+       /* Expect exactly one argument */
+       if (argc != 2)
+               return 1;
+
+       if (strcmp(argv[1], "depends") == 0) {
+               printf("ccan/compiler\n");
+               printf("ccan/endian\n");
+               return 0;
+       }
+
+       if (strcmp(argv[1], "testdepends") == 0) {
+               printf("ccan/str/hex\n");
+               return 0;
+       }
+
+       if (strcmp(argv[1], "libs") == 0) {
+#ifdef CCAN_CRYPTO_SHA512_USE_OPENSSL
+               printf("crypto\n");
+#endif
+               return 0;
+       }
+
+       return 1;
+}