merge BLAKE3-c into this repo

This is commit 4476d9da0e370993823e7ad17592b84e905afd76 of
https://github.com/veorq/BLAKE3-c.

1 files changed, 35 insertions, 0 deletions

diff --git a/c/blake3.h b/c/blake3.h
new file mode 100644
index 0000000..c3cf6be
--- /dev/null
+++ b/c/blake3.h
@@ -0,0 +1,35 @@
+#pragma once
+
+#include <stdint.h>
+
+#define BLAKE3_KEY_LEN 32
+#define BLAKE3_OUT_LEN 32
+#define BLAKE3_BLOCK_LEN 64
+#define BLAKE3_CHUNK_LEN 1024
+#define BLAKE3_MAX_DEPTH 54
+#define BLAKE3_MAX_SIMD_DEGREE 16
+
+typedef struct {
+  uint32_t cv[8];
+  uint64_t chunk_counter;
+  uint8_t buf[BLAKE3_BLOCK_LEN];
+  uint8_t buf_len;
+  uint8_t blocks_compressed;
+  uint8_t flags;
+} blake3_chunk_state;
+
+typedef struct {
+  uint32_t key[8];
+  blake3_chunk_state chunk;
+  uint8_t cv_stack_len;
+  uint8_t cv_stack[BLAKE3_MAX_DEPTH * BLAKE3_OUT_LEN];
+} blake3_hasher;
+
+void blake3_hasher_init(blake3_hasher *self);
+void blake3_hasher_init_keyed(blake3_hasher *self,
+                              const uint8_t key[BLAKE3_KEY_LEN]);
+void blake3_hasher_init_derive_key(blake3_hasher *self, const char *context);
+void blake3_hasher_update(blake3_hasher *self, const void *input,
+                          size_t input_len);
+void blake3_hasher_finalize(const blake3_hasher *self, uint8_t *out,
+                            size_t out_len);