Add xform-conforming auth_hash wrapper for Poly-1305

The wrapper is a thin shim around libsodium's Poly-1305 implementation.  For
now, we just use the C algorithm and do not attempt to build the
SSE-optimized variant for x86 processors.

The algorithm support has not yet been plumbed through cryptodev, or added
to cryptosoft.

1 files changed, 16 insertions, 0 deletions

diff --git a/sys/opencrypto/xform_poly1305.h b/sys/opencrypto/xform_poly1305.h
new file mode 100644
index 000000000000..7364ecdef117
--- /dev/null
+++ b/sys/opencrypto/xform_poly1305.h
@@ -0,0 +1,16 @@
+/* This file is in the public domain. */
+/* $FreeBSD$ */
+#pragma once
+
+#include <sys/types.h>
+
+struct poly1305_xform_ctx;
+
+void Poly1305_Init(struct poly1305_xform_ctx *);
+
+void Poly1305_Setkey(struct poly1305_xform_ctx *,
+    const uint8_t [__min_size(32)], size_t);
+
+int Poly1305_Update(struct poly1305_xform_ctx *, const void *, size_t);
+
+void Poly1305_Final(uint8_t [__min_size(16)], struct poly1305_xform_ctx *);