1 files changed, 32 insertions, 0 deletions
diff --git a/include/libssh/chacha.h b/include/libssh/chacha.h
new file mode 100644
index 00000000..84ff66a2
--- /dev/null
+++ b/include/libssh/chacha.h
@@ -0,0 +1,32 @@
+/* $OpenBSD: chacha.h,v 1.3 2014/05/02 03:27:54 djm Exp $ */
+
+/*
+chacha-merged.c version 20080118
+D. J. Bernstein
+Public domain.
+*/
+
+#ifndef CHACHA_H
+#define CHACHA_H
+
+struct chacha_ctx {
+    uint32_t input[16];
+};
+
+#define CHACHA_MINKEYLEN  16
+#define CHACHA_NONCELEN   8
+#define CHACHA_CTRLEN     8
+#define CHACHA_STATELEN   (CHACHA_NONCELEN+CHACHA_CTRLEN)
+#define CHACHA_BLOCKLEN   64
+
+void chacha_keysetup(struct chacha_ctx *x, const uint8_t *k, uint32_t kbits)
+    __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN)));
+void chacha_ivsetup(struct chacha_ctx *x, const uint8_t *iv, const uint8_t *ctr)
+    __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN)))
+    __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN)));
+void chacha_encrypt_bytes(struct chacha_ctx *x, const uint8_t *m,
+    uint8_t *c, uint32_t bytes)
+    __attribute__((__bounded__(__buffer__, 2, 4)))
+    __attribute__((__bounded__(__buffer__, 3, 4)));
+
+#endif    /* CHACHA_H */