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-rw-r--r--chacha.h36
1 files changed, 36 insertions, 0 deletions
diff --git a/chacha.h b/chacha.h
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+++ b/chacha.h
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+/* $OpenBSD: chacha.h,v 1.5 2021/04/03 05:54:14 djm Exp $ */
+
+/*
+chacha-merged.c version 20080118
+D. J. Bernstein
+Public domain.
+*/
+
+#ifndef CHACHA_H
+#define CHACHA_H
+
+#include <sys/types.h>
+#include <stdlib.h>
+
+struct chacha_ctx {
+ u_int 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 u_char *k, u_int kbits)
+ __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN)));
+void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv, const u_char *ctr)
+ __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN)))
+ __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN)));
+void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m,
+ u_char *c, u_int bytes)
+ __attribute__((__bounded__(__buffer__, 2, 4)))
+ __attribute__((__bounded__(__buffer__, 3, 4)));
+
+#endif /* CHACHA_H */
+