1 files changed, 47 insertions, 0 deletions
diff --git a/src/ext/compat_blake2.h b/src/ext/compat_blake2.h
new file mode 100644
index 0000000000..01adb2c34a
--- /dev/null
+++ b/src/ext/compat_blake2.h
@@ -0,0 +1,47 @@
+/* Copyright (c) 2023, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+/**
+ * \file compat_blake2.h
+ *
+ * \brief Compatibility adapter providing blake2b using ext/equix/hashx
+ **/
+
+#ifndef TOR_COMPAT_BLAKE2_H
+#define TOR_COMPAT_BLAKE2_H
+
+#include <stddef.h>
+#include <string.h>
+#include "lib/cc/compat_compiler.h"
+#include "ext/equix/hashx/src/blake2.h"
+
+static inline int
+blake2b_init_param(blake2b_state *S, const blake2b_param *P)
+{
+    return hashx_blake2b_init_param(S, P);
+}
+
+static inline int
+blake2b_init(blake2b_state *S, const uint8_t digest_length)
+{
+    blake2b_param P;
+    memset(&P, 0, sizeof P);
+    P.digest_length = digest_length;
+    P.fanout = 1;
+    P.depth = 1;
+    return blake2b_init_param(S, &P);
+}
+
+static inline int
+blake2b_update(blake2b_state *S, const uint8_t *in, uint64_t inlen)
+{
+    return hashx_blake2b_update(S, in, inlen);
+}
+
+static inline int
+blake2b_final(blake2b_state *S, uint8_t *out, uint8_t outlen)
+{
+    return hashx_blake2b_final(S, out, outlen);
+}
+
+#endif /* !defined(TOR_COMPAT_BLAKE2_H) */