1 files changed, 148 insertions, 0 deletions
diff --git a/lib/blake2.h b/lib/blake2.h
new file mode 100644
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--- /dev/null
+++ b/lib/blake2.h
@@ -0,0 +1,148 @@
+/*
+ *	BIRD Library -- BLAKE2 Hash Functions
+ *
+ *	Based on the code from BLAKE2 reference source code package
+ *
+ *	Copyright 2012, Samuel Neves <sneves@dei.uc.pt>
+ *
+ *	You may use this under the terms of the CC0, the OpenSSL Licence, or the
+ *	Apache Public License 2.0, at your option.  The terms of these licenses
+ *	can be found at:
+ *
+ *	- CC0 1.0 Universal : https://creativecommons.org/publicdomain/zero/1.0
+ *	- OpenSSL license   : https://www.openssl.org/source/license.html
+ *	- Apache 2.0        : https://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  	More information about the BLAKE2 hash function can be found at
+ *	https://blake2.net/ web.
+ */
+
+#ifndef _BIRD_BLAKE2_H_
+#define _BIRD_BLAKE2_H_
+
+#include "nest/bird.h"
+
+
+enum blake2s_constant
+{
+  BLAKE2S_BLOCKBYTES		= 64,
+  BLAKE2S_OUTBYTES		= 32,
+  BLAKE2S_KEYBYTES		= 32,
+  BLAKE2S_SALTBYTES		=  8,
+  BLAKE2S_PERSONALBYTES		=  8,
+};
+
+enum blake2b_constant
+{
+  BLAKE2B_BLOCKBYTES		= 128,
+  BLAKE2B_OUTBYTES		=  64,
+  BLAKE2B_KEYBYTES		=  64,
+  BLAKE2B_SALTBYTES		=  16,
+  BLAKE2B_PERSONALBYTES		=  16,
+};
+
+#define BLAKE2S_SIZE		32  // BLAKE2S_OUTBYTES
+#define BLAKE2S_BLOCK_SIZE	64  // BLAKE2S_BLOCKBYTES
+#define BLAKE2S_256_SIZE	32
+
+#define BLAKE2B_SIZE		64  // BLAKE2B_OUTBYTES
+#define BLAKE2B_BLOCK_SIZE	128 // BLAKE2B_BLOCKBYTES
+#define BLAKE2B_512_SIZE	64
+
+
+struct blake2s_state
+{
+  u32 h[8];
+  u32 t[2];
+  u32 f[2];
+  byte buf[BLAKE2S_BLOCK_SIZE];
+  uint buflen;
+  uint outlen;
+  u8 last_node;
+};
+
+struct blake2b_state
+{
+  u64 h[8];
+  u64 t[2];
+  u64 f[2];
+  byte buf[BLAKE2B_BLOCK_SIZE];
+  uint buflen;
+  uint outlen;
+  u8 last_node;
+};
+
+struct blake2s_param
+{
+  u8  digest_length;	/* 1 */
+  u8  key_length;	/* 2 */
+  u8  fanout;		/* 3 */
+  u8  depth;		/* 4 */
+  u32 leaf_length;	/* 8 */
+  u32 node_offset;	/* 12 */
+  u16 xof_length;	/* 14 */
+  u8  node_depth;	/* 15 */
+  u8  inner_length;	/* 16 */
+  /* byte  reserved[0]; */
+  byte salt[BLAKE2S_SALTBYTES];		/* 24 */
+  byte personal[BLAKE2S_PERSONALBYTES];	/* 32 */
+} PACKED;
+
+struct blake2b_param
+{
+  u8  digest_length;	/* 1 */
+  u8  key_length;	/* 2 */
+  u8  fanout;		/* 3 */
+  u8  depth;		/* 4 */
+  u32 leaf_length;	/* 8 */
+  u32 node_offset;	/* 12 */
+  u32 xof_length;	/* 16 */
+  u8  node_depth;	/* 17 */
+  u8  inner_length;	/* 18 */
+  byte reserved[14];	/* 32 */
+  byte salt[BLAKE2B_SALTBYTES];		/* 48 */
+  byte personal[BLAKE2B_PERSONALBYTES];	/* 64 */
+} PACKED;
+
+
+/* Streaming API */
+int blake2s_init(struct blake2s_state *s, size_t outlen);
+int blake2s_init_key(struct blake2s_state *s, size_t outlen, const void *key, size_t keylen);
+int blake2s_init_param(struct blake2s_state *s, const struct blake2s_param *p);
+int blake2s_update(struct blake2s_state *s, const void *in, size_t inlen);
+int blake2s_final(struct blake2s_state *s, void *out, size_t outlen);
+
+int blake2b_init(struct blake2b_state *s, size_t outlen);
+int blake2b_init_key(struct blake2b_state *s, size_t outlen, const void *key, size_t keylen);
+int blake2b_init_param(struct blake2b_state *s, const struct blake2b_param *p);
+int blake2b_update(struct blake2b_state *s, const void *in, size_t inlen);
+int blake2b_final(struct blake2b_state *s, void *out, size_t outlen);
+
+
+/* Wrapper functions for MAC class */
+
+struct mac_desc;
+struct mac_context;
+
+struct blake2s_context {
+  const struct mac_desc *type;
+  struct blake2s_state state;
+  byte buf[BLAKE2S_SIZE];
+};
+
+struct blake2b_context {
+  const struct mac_desc *type;
+  struct blake2b_state state;
+  byte buf[BLAKE2B_SIZE];
+};
+
+
+void blake2s_mac_init(struct mac_context *ctx, const byte *key, uint keylen);
+void blake2s_mac_update(struct mac_context *ctx, const byte *data, uint datalen);
+byte *blake2s_mac_final(struct mac_context *ctx);
+
+void blake2b_mac_init(struct mac_context *ctx, const byte *key, uint keylen);
+void blake2b_mac_update(struct mac_context *ctx, const byte *data, uint datalen);
+byte *blake2b_mac_final(struct mac_context *ctx);
+
+#endif /* _BIRD_BLAKE2_H_ */