1 files changed, 30 insertions, 0 deletions
diff --git a/src/blake2.h b/src/blake2.h
new file mode 100644
index 0000000..7deeaa1
--- /dev/null
+++ b/src/blake2.h
@@ -0,0 +1,30 @@
+#ifndef ARGON2_BLAKE2_H
+#define ARGON2_BLAKE2_H
+
+#include <stddef.h>
+#include <stdint.h>
+
+enum blake2b_constant {
+    BLAKE2B_BLOCKBYTES = 128,
+    BLAKE2B_OUTBYTES = 64,
+    BLAKE2B_KEYBYTES = 64,
+    BLAKE2B_SALTBYTES = 16,
+    BLAKE2B_PERSONALBYTES = 16
+};
+
+typedef struct __blake2b_state {
+    uint64_t h[8];
+    uint64_t t[2];
+    uint8_t buf[BLAKE2B_BLOCKBYTES];
+    size_t buflen;
+} blake2b_state;
+
+/* Streaming API */
+void blake2b_init(blake2b_state *S, size_t outlen);
+void blake2b_update(blake2b_state *S, const void *in, size_t inlen);
+void blake2b_final(blake2b_state *S, void *out, size_t outlen);
+
+void blake2b_long(void *out, size_t outlen, const void *in, size_t inlen);
+
+#endif // ARGON2_BLAKE2_H
+