Put ssh back into the repository
Change-Id: I23324372188fa6ed3f93a32b84365f5df6367590
diff --git a/buffer.h b/buffer.h
new file mode 100644
index 0000000..e2a9dd1
--- /dev/null
+++ b/buffer.h
@@ -0,0 +1,98 @@
+/* $OpenBSD: buffer.h,v 1.21 2010/08/31 11:54:45 djm Exp $ */
+
+/*
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ * Code for manipulating FIFO buffers.
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ */
+
+#ifndef BUFFER_H
+#define BUFFER_H
+
+typedef struct {
+ u_char *buf; /* Buffer for data. */
+ u_int alloc; /* Number of bytes allocated for data. */
+ u_int offset; /* Offset of first byte containing data. */
+ u_int end; /* Offset of last byte containing data. */
+} Buffer;
+
+void buffer_init(Buffer *);
+void buffer_clear(Buffer *);
+void buffer_free(Buffer *);
+
+u_int buffer_len(const Buffer *);
+void *buffer_ptr(const Buffer *);
+
+void buffer_append(Buffer *, const void *, u_int);
+void *buffer_append_space(Buffer *, u_int);
+
+int buffer_check_alloc(Buffer *, u_int);
+
+void buffer_get(Buffer *, void *, u_int);
+
+void buffer_consume(Buffer *, u_int);
+void buffer_consume_end(Buffer *, u_int);
+
+void buffer_dump(const Buffer *);
+
+int buffer_get_ret(Buffer *, void *, u_int);
+int buffer_consume_ret(Buffer *, u_int);
+int buffer_consume_end_ret(Buffer *, u_int);
+
+#include <openssl/bn.h>
+
+void buffer_put_bignum(Buffer *, const BIGNUM *);
+void buffer_put_bignum2(Buffer *, const BIGNUM *);
+void buffer_get_bignum(Buffer *, BIGNUM *);
+void buffer_get_bignum2(Buffer *, BIGNUM *);
+
+u_short buffer_get_short(Buffer *);
+void buffer_put_short(Buffer *, u_short);
+
+u_int buffer_get_int(Buffer *);
+void buffer_put_int(Buffer *, u_int);
+
+u_int64_t buffer_get_int64(Buffer *);
+void buffer_put_int64(Buffer *, u_int64_t);
+
+int buffer_get_char(Buffer *);
+void buffer_put_char(Buffer *, int);
+
+void *buffer_get_string(Buffer *, u_int *);
+void *buffer_get_string_ptr(Buffer *, u_int *);
+void buffer_put_string(Buffer *, const void *, u_int);
+char *buffer_get_cstring(Buffer *, u_int *);
+void buffer_put_cstring(Buffer *, const char *);
+
+#define buffer_skip_string(b) \
+ do { u_int l = buffer_get_int(b); buffer_consume(b, l); } while (0)
+
+int buffer_put_bignum_ret(Buffer *, const BIGNUM *);
+int buffer_get_bignum_ret(Buffer *, BIGNUM *);
+int buffer_put_bignum2_ret(Buffer *, const BIGNUM *);
+int buffer_get_bignum2_ret(Buffer *, BIGNUM *);
+int buffer_get_short_ret(u_short *, Buffer *);
+int buffer_get_int_ret(u_int *, Buffer *);
+int buffer_get_int64_ret(u_int64_t *, Buffer *);
+void *buffer_get_string_ret(Buffer *, u_int *);
+char *buffer_get_cstring_ret(Buffer *, u_int *);
+void *buffer_get_string_ptr_ret(Buffer *, u_int *);
+int buffer_get_char_ret(char *, Buffer *);
+
+#ifdef OPENSSL_HAS_ECC
+#include <openssl/ec.h>
+
+int buffer_put_ecpoint_ret(Buffer *, const EC_GROUP *, const EC_POINT *);
+void buffer_put_ecpoint(Buffer *, const EC_GROUP *, const EC_POINT *);
+int buffer_get_ecpoint_ret(Buffer *, const EC_GROUP *, EC_POINT *);
+void buffer_get_ecpoint(Buffer *, const EC_GROUP *, EC_POINT *);
+#endif
+
+#endif /* BUFFER_H */