1 files changed, 87 insertions, 0 deletions
diff --git a/src/libcryptobox/chacha20/chacha.h b/src/libcryptobox/chacha20/chacha.h
new file mode 100644
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--- /dev/null
+++ b/src/libcryptobox/chacha20/chacha.h
@@ -0,0 +1,87 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2015 Andrew Moon, Vsevolod Stakhov
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+
+#ifndef CHACHA_H_
+#define CHACHA_H_
+
+
+#define CHACHA_BLOCKBYTES 64
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct chacha_state_internal_t {
+	unsigned char s[48];
+	size_t rounds;
+	size_t leftover;
+	unsigned char buffer[CHACHA_BLOCKBYTES];
+} chacha_state_internal;
+
+typedef struct chacha_state_t {
+	unsigned char opaque[128];
+} chacha_state;
+
+typedef struct chacha_key_t {
+	unsigned char b[32];
+} chacha_key;
+
+typedef struct chacha_iv_t {
+	unsigned char b[8];
+} chacha_iv;
+
+typedef struct chacha_iv24_t {
+	unsigned char b[24];
+} chacha_iv24;
+
+void hchacha(const unsigned char key[32], const unsigned char iv[16],
+			 unsigned char out[32], size_t rounds);
+
+void chacha_init(chacha_state *S, const chacha_key *key, const chacha_iv *iv,
+				 size_t rounds);
+
+void xchacha_init(chacha_state *S, const chacha_key *key,
+				  const chacha_iv24 *iv, size_t rounds);
+
+size_t chacha_update(chacha_state *S, const unsigned char *in,
+					 unsigned char *out, size_t inlen);
+
+size_t chacha_final(chacha_state *S, unsigned char *out);
+
+void chacha(const chacha_key *key, const chacha_iv *iv,
+			const unsigned char *in, unsigned char *out, size_t inlen,
+			size_t rounds);
+
+void xchacha(const chacha_key *key, const chacha_iv24 *iv,
+			 const unsigned char *in, unsigned char *out, size_t inlen,
+			 size_t rounds);
+
+const char *chacha_load(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CHACHA_H_ */