1255767Sdes/* $OpenBSD: buffer.h,v 1.22 2013/07/12 00:19:58 djm Exp $ */ 2224638Sbrooks/* $FreeBSD$ */ 392555Sdes 457429Smarkm/* 557429Smarkm * Author: Tatu Ylonen <ylo@cs.hut.fi> 657429Smarkm * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland 757429Smarkm * All rights reserved 857429Smarkm * Code for manipulating FIFO buffers. 960573Skris * 1065668Skris * As far as I am concerned, the code I have written for this software 1165668Skris * can be used freely for any purpose. Any derived versions of this 1265668Skris * software must be clearly marked as such, and if the derived work is 1365668Skris * incompatible with the protocol description in the RFC file, it must be 1465668Skris * called by a name other than "ssh" or "Secure Shell". 1557429Smarkm */ 1657429Smarkm 1757429Smarkm#ifndef BUFFER_H 1857429Smarkm#define BUFFER_H 1957429Smarkm 2057429Smarkmtypedef struct { 2192555Sdes u_char *buf; /* Buffer for data. */ 2292555Sdes u_int alloc; /* Number of bytes allocated for data. */ 2392555Sdes u_int offset; /* Offset of first byte containing data. */ 2492555Sdes u_int end; /* Offset of last byte containing data. */ 2557429Smarkm} Buffer; 2657429Smarkm 2792555Sdesvoid buffer_init(Buffer *); 2892555Sdesvoid buffer_clear(Buffer *); 2992555Sdesvoid buffer_free(Buffer *); 3057429Smarkm 31204917Sdesu_int buffer_len(const Buffer *); 32204917Sdesvoid *buffer_ptr(const Buffer *); 3357429Smarkm 3492555Sdesvoid buffer_append(Buffer *, const void *, u_int); 3592555Sdesvoid *buffer_append_space(Buffer *, u_int); 3657429Smarkm 37162852Sdesint buffer_check_alloc(Buffer *, u_int); 38162852Sdes 3992555Sdesvoid buffer_get(Buffer *, void *, u_int); 4057429Smarkm 4192555Sdesvoid buffer_consume(Buffer *, u_int); 4292555Sdesvoid buffer_consume_end(Buffer *, u_int); 4357429Smarkm 44204917Sdesvoid buffer_dump(const Buffer *); 4557429Smarkm 46146998Sdesint buffer_get_ret(Buffer *, void *, u_int); 47146998Sdesint buffer_consume_ret(Buffer *, u_int); 48146998Sdesint buffer_consume_end_ret(Buffer *, u_int); 49146998Sdes 50224638Sbrooksu_int buffer_get_max_len(void); 51224638Sbrooks 52162852Sdes#include <openssl/bn.h> 53162852Sdes 54162852Sdesvoid buffer_put_bignum(Buffer *, const BIGNUM *); 55162852Sdesvoid buffer_put_bignum2(Buffer *, const BIGNUM *); 56162852Sdesvoid buffer_get_bignum(Buffer *, BIGNUM *); 57162852Sdesvoid buffer_get_bignum2(Buffer *, BIGNUM *); 58162852Sdes 59162852Sdesu_short buffer_get_short(Buffer *); 60162852Sdesvoid buffer_put_short(Buffer *, u_short); 61162852Sdes 62162852Sdesu_int buffer_get_int(Buffer *); 63162852Sdesvoid buffer_put_int(Buffer *, u_int); 64162852Sdes 65162852Sdesu_int64_t buffer_get_int64(Buffer *); 66162852Sdesvoid buffer_put_int64(Buffer *, u_int64_t); 67162852Sdes 68162852Sdesint buffer_get_char(Buffer *); 69162852Sdesvoid buffer_put_char(Buffer *, int); 70162852Sdes 71162852Sdesvoid *buffer_get_string(Buffer *, u_int *); 72181111Sdesvoid *buffer_get_string_ptr(Buffer *, u_int *); 73162852Sdesvoid buffer_put_string(Buffer *, const void *, u_int); 74221420Sdeschar *buffer_get_cstring(Buffer *, u_int *); 75162852Sdesvoid buffer_put_cstring(Buffer *, const char *); 76162852Sdes 77162852Sdes#define buffer_skip_string(b) \ 78162852Sdes do { u_int l = buffer_get_int(b); buffer_consume(b, l); } while (0) 79162852Sdes 80162852Sdesint buffer_put_bignum_ret(Buffer *, const BIGNUM *); 81162852Sdesint buffer_get_bignum_ret(Buffer *, BIGNUM *); 82162852Sdesint buffer_put_bignum2_ret(Buffer *, const BIGNUM *); 83162852Sdesint buffer_get_bignum2_ret(Buffer *, BIGNUM *); 84162852Sdesint buffer_get_short_ret(u_short *, Buffer *); 85162852Sdesint buffer_get_int_ret(u_int *, Buffer *); 86162852Sdesint buffer_get_int64_ret(u_int64_t *, Buffer *); 87162852Sdesvoid *buffer_get_string_ret(Buffer *, u_int *); 88221420Sdeschar *buffer_get_cstring_ret(Buffer *, u_int *); 89204917Sdesvoid *buffer_get_string_ptr_ret(Buffer *, u_int *); 90255767Sdesint buffer_get_char_ret(u_char *, Buffer *); 91162852Sdes 92221420Sdes#ifdef OPENSSL_HAS_ECC 93221420Sdes#include <openssl/ec.h> 94221420Sdes 95221420Sdesint buffer_put_ecpoint_ret(Buffer *, const EC_GROUP *, const EC_POINT *); 96221420Sdesvoid buffer_put_ecpoint(Buffer *, const EC_GROUP *, const EC_POINT *); 97221420Sdesint buffer_get_ecpoint_ret(Buffer *, const EC_GROUP *, EC_POINT *); 98221420Sdesvoid buffer_get_ecpoint(Buffer *, const EC_GROUP *, EC_POINT *); 99221420Sdes#endif 100221420Sdes 10157429Smarkm#endif /* BUFFER_H */ 102