1 files changed, 38 insertions, 0 deletions
diff --git a/include/libecc/hash/hmac.h b/include/libecc/hash/hmac.h
new file mode 100644
index 000000000000..e65b470db0b3
--- /dev/null
+++ b/include/libecc/hash/hmac.h
@@ -0,0 +1,38 @@
+#ifndef __HMAC_H__
+#define __HMAC_H__
+
+#include <libecc/lib_ecc_config.h>
+#ifdef WITH_HMAC
+
+#include <libecc/words/words.h>
+#include <libecc/utils/utils.h>
+#include <libecc/hash/hash_algs.h>
+
+#define HMAC_MAGIC ((word_t)(0x9849020187612083ULL))
+#define HMAC_CHECK_INITIALIZED(A, ret, err) \
+        MUST_HAVE((((void *)(A)) != NULL) && ((A)->magic == HMAC_MAGIC) && ((A)->hash != NULL), ret, err)
+
+/* The HMAC structure is made of two hash contexts */
+typedef struct {
+	/* The hash mapping associated with the hmac */
+        const hash_mapping *hash;
+	/* The two hash contexts (inner and outer) */
+        hash_context in_ctx;
+        hash_context out_ctx;
+        /* Initialization magic value */
+        word_t magic;
+} hmac_context;
+
+ATTRIBUTE_WARN_UNUSED_RET int hmac_init(hmac_context *ctx, const u8 *hmackey, u32 hmackey_len, hash_alg_type hash_type);
+
+ATTRIBUTE_WARN_UNUSED_RET int hmac_update(hmac_context *ctx, const u8 *input, u32 ilen);
+
+ATTRIBUTE_WARN_UNUSED_RET int hmac_finalize(hmac_context *ctx, u8 *output, u8 *outlen);
+
+ATTRIBUTE_WARN_UNUSED_RET int hmac(const u8 *hmackey, u32 hmackey_len, hash_alg_type hash_type, const u8 *input, u32 ilen, u8 *output, u8 *outlen);
+
+ATTRIBUTE_WARN_UNUSED_RET int hmac_scattered(const u8 *hmackey, u32 hmackey_len, hash_alg_type hash_type, const u8 **inputs, const u32 *ilens, u8 *output, u8 *outlen);
+
+#endif /* WITH_HMAC */
+
+#endif /* __HMAC_H__ */