1 /* $OpenBSD: buffer.h,v 1.21 2010/08/31 11:54:45 djm Exp $ */ 2 3 /* 4 * Author: Tatu Ylonen <ylo (at) cs.hut.fi> 5 * Copyright (c) 1995 Tatu Ylonen <ylo (at) cs.hut.fi>, Espoo, Finland 6 * All rights reserved 7 * Code for manipulating FIFO buffers. 8 * 9 * As far as I am concerned, the code I have written for this software 10 * can be used freely for any purpose. Any derived versions of this 11 * software must be clearly marked as such, and if the derived work is 12 * incompatible with the protocol description in the RFC file, it must be 13 * called by a name other than "ssh" or "Secure Shell". 14 */ 15 16 #ifndef BUFFER_H 17 #define BUFFER_H 18 19 typedef struct { 20 u_char *buf; /* Buffer for data. */ 21 u_int alloc; /* Number of bytes allocated for data. */ 22 u_int offset; /* Offset of first byte containing data. */ 23 u_int end; /* Offset of last byte containing data. */ 24 } Buffer; 25 26 void buffer_init(Buffer *); 27 void buffer_clear(Buffer *); 28 void buffer_free(Buffer *); 29 30 u_int buffer_len(const Buffer *); 31 void *buffer_ptr(const Buffer *); 32 33 void buffer_append(Buffer *, const void *, u_int); 34 void *buffer_append_space(Buffer *, u_int); 35 36 int buffer_check_alloc(Buffer *, u_int); 37 38 void buffer_get(Buffer *, void *, u_int); 39 40 void buffer_consume(Buffer *, u_int); 41 void buffer_consume_end(Buffer *, u_int); 42 43 void buffer_dump(const Buffer *); 44 45 int buffer_get_ret(Buffer *, void *, u_int); 46 int buffer_consume_ret(Buffer *, u_int); 47 int buffer_consume_end_ret(Buffer *, u_int); 48 49 #include <openssl/bn.h> 50 51 void buffer_put_bignum(Buffer *, const BIGNUM *); 52 void buffer_put_bignum2(Buffer *, const BIGNUM *); 53 void buffer_get_bignum(Buffer *, BIGNUM *); 54 void buffer_get_bignum2(Buffer *, BIGNUM *); 55 56 u_short buffer_get_short(Buffer *); 57 void buffer_put_short(Buffer *, u_short); 58 59 u_int buffer_get_int(Buffer *); 60 void buffer_put_int(Buffer *, u_int); 61 62 u_int64_t buffer_get_int64(Buffer *); 63 void buffer_put_int64(Buffer *, u_int64_t); 64 65 int buffer_get_char(Buffer *); 66 void buffer_put_char(Buffer *, int); 67 68 void *buffer_get_string(Buffer *, u_int *); 69 void *buffer_get_string_ptr(Buffer *, u_int *); 70 void buffer_put_string(Buffer *, const void *, u_int); 71 char *buffer_get_cstring(Buffer *, u_int *); 72 void buffer_put_cstring(Buffer *, const char *); 73 74 #define buffer_skip_string(b) \ 75 do { u_int l = buffer_get_int(b); buffer_consume(b, l); } while (0) 76 77 int buffer_put_bignum_ret(Buffer *, const BIGNUM *); 78 int buffer_get_bignum_ret(Buffer *, BIGNUM *); 79 int buffer_put_bignum2_ret(Buffer *, const BIGNUM *); 80 int buffer_get_bignum2_ret(Buffer *, BIGNUM *); 81 int buffer_get_short_ret(u_short *, Buffer *); 82 int buffer_get_int_ret(u_int *, Buffer *); 83 int buffer_get_int64_ret(u_int64_t *, Buffer *); 84 void *buffer_get_string_ret(Buffer *, u_int *); 85 char *buffer_get_cstring_ret(Buffer *, u_int *); 86 void *buffer_get_string_ptr_ret(Buffer *, u_int *); 87 int buffer_get_char_ret(char *, Buffer *); 88 89 #ifdef OPENSSL_HAS_ECC 90 #include <openssl/ec.h> 91 92 int buffer_put_ecpoint_ret(Buffer *, const EC_GROUP *, const EC_POINT *); 93 void buffer_put_ecpoint(Buffer *, const EC_GROUP *, const EC_POINT *); 94 int buffer_get_ecpoint_ret(Buffer *, const EC_GROUP *, EC_POINT *); 95 void buffer_get_ecpoint(Buffer *, const EC_GROUP *, EC_POINT *); 96 #endif 97 98 #endif /* BUFFER_H */ 99
