crypto/hmac_sha256: new module.

[ccan] / ccan / crypto / hmac_sha256 / hmac_sha256.h

diff --git a/ccan/crypto/hmac_sha256/hmac_sha256.h b/ccan/crypto/hmac_sha256/hmac_sha256.h
new file mode 100644 (file)
index 0000000..2ddcbe3
--- /dev/null
+++ b/ccan/crypto/hmac_sha256/hmac_sha256.h
@@ -0,0 +1,34 @@
+#ifndef CCAN_CRYPTO_HMAC_SHA256_H
+#define CCAN_CRYPTO_HMAC_SHA256_H
+/* BSD-MIT - see LICENSE file for details */
+#include "config.h"
+#include <stdint.h>
+#include <stdlib.h>
+#include <ccan/crypto/sha256/sha256.h>
+
+/* Uncomment this to use openssl's HMAC routines (and link with -lcrypto) */
+/*#define CCAN_CRYPTO_HMAC_USE_OPENSSL 1*/
+
+#ifdef CCAN_CRYPTO_HMAC_USE_OPENSSL
+#include <openssl/hmac.h>
+#endif
+
+/**
+ * struct hmac_sha256 - structure representing a completed HMAC.
+ */
+struct hmac_sha256 {
+       struct sha256 sha;
+};
+
+/**
+ * hmac_sha256 - return hmac of an object with a key.
+ * @hmac: the hmac to fill in
+ * @k: pointer to the key,
+ * @ksize: the number of bytes pointed to by @k
+ * @d: pointer to memory,
+ * @dsize: the number of bytes pointed to by @d
+ */
+void hmac_sha256(struct hmac_sha256 *hmac,
+                const void *k, size_t ksize,
+                const void *d, size_t dsize);
+#endif /* CCAN_CRYPTO_HMAC_SHA256_H */