Mercurial > dropbear

comparison buffer.c @ 118:5312ca05ed48 private-rez

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propagate of 717950f4061f1123659ee87c7c168805af920ab7 and 839f98f136788cc1466e4641bf796f96040a085d from branch 'matt.dbclient.authpam' to 'matt.dbclient.rez'
author Matt Johnston <matt@ucc.asn.au>
date Sun, 12 Sep 2004 04:56:50 +0000
parents 10f4d3319780
children 0cfba3034be5
comparison
equal deleted inserted replaced
57:3b2a5a1c4347 118:5312ca05ed48
1 /* 1 /*
2 * Dropbear - a SSH2 server 2 * Dropbear SSH
3 * 3 *
4 * Copyright (c) 2002,2003 Matt Johnston 4 * Copyright (c) 2002,2003 Matt Johnston
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * Permission is hereby granted, free of charge, to any person obtaining a copy
32 * Calling functions should check arguments first, but this provides a 32 * Calling functions should check arguments first, but this provides a
33 * backstop */ 33 * backstop */
34 #define BUF_MAX_INCR 1000000000 34 #define BUF_MAX_INCR 1000000000
35 #define BUF_MAX_SIZE 1000000000 35 #define BUF_MAX_SIZE 1000000000
36 36
37 /* avoid excessively large numbers, > 5000 bit */ 37 /* avoid excessively large numbers, > ~8192 bits */
38 #define BUF_MAX_MPINT (5000 / 8) 38 #define BUF_MAX_MPINT (8240 / 8)
39 39
40 /* Create (malloc) a new buffer of size */ 40 /* Create (malloc) a new buffer of size */
41 buffer* buf_new(unsigned int size) { 41 buffer* buf_new(unsigned int size) {
42 42
43 buffer* buf; 43 buffer* buf;
74 74
75 m_burn(buf->data, buf->size); 75 m_burn(buf->data, buf->size);
76 76
77 } 77 }
78 78
79 /* resize a buffer, pos and len will be repositioned if required */ 79 /* resize a buffer, pos and len will be repositioned if required when
80 * downsizing */
80 void buf_resize(buffer *buf, unsigned int newsize) { 81 void buf_resize(buffer *buf, unsigned int newsize) {
81 82
82 if (newsize > BUF_MAX_SIZE) { 83 if (newsize > BUF_MAX_SIZE) {
83 dropbear_exit("buf->size too big"); 84 dropbear_exit("buf->size too big");
84 } 85 }
149 } 150 }
150 151
151 /* Get a byte from the buffer and increment the pos */ 152 /* Get a byte from the buffer and increment the pos */
152 unsigned char buf_getbyte(buffer* buf) { 153 unsigned char buf_getbyte(buffer* buf) {
153 154
155 /* This check is really just ==, but the >= allows us to check for the
156 * assert()able case of pos > len, which should _never_ happen. */
154 if (buf->pos >= buf->len) { 157 if (buf->pos >= buf->len) {
155 dropbear_exit("bad buf_getbyte"); 158 dropbear_exit("bad buf_getbyte");
156 } 159 }
157 return buf->data[buf->pos++]; 160 return buf->data[buf->pos++];
158 } 161 }