1 /* $OpenBSD: buffer.c,v 1.36 2014/04/30 05:29:56 djm Exp $ */ 2 3 /* 4 * Copyright (c) 2012 Damien Miller <djm@mindrot.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 /* Emulation wrappers for legacy OpenSSH buffer API atop sshbuf */ 20 21 #include "includes.h" 22 23 #include <sys/types.h> 24 25 #include "buffer.h" 26 #include "log.h" 27 #include "ssherr.h" 28 29 void buffer_append(Buffer * buffer,const void * data,u_int len)30 buffer_append(Buffer *buffer, const void *data, u_int len) 31 { 32 int ret; 33 34 if ((ret = sshbuf_put(buffer, data, len)) != 0) 35 fatal("%s: %s", __func__, ssh_err(ret)); 36 } 37 38 void * buffer_append_space(Buffer * buffer,u_int len)39 buffer_append_space(Buffer *buffer, u_int len) 40 { 41 int ret; 42 u_char *p; 43 44 if ((ret = sshbuf_reserve(buffer, len, &p)) != 0) 45 fatal("%s: %s", __func__, ssh_err(ret)); 46 return p; 47 } 48 49 int buffer_check_alloc(Buffer * buffer,u_int len)50 buffer_check_alloc(Buffer *buffer, u_int len) 51 { 52 int ret = sshbuf_check_reserve(buffer, len); 53 54 if (ret == 0) 55 return 1; 56 if (ret == SSH_ERR_NO_BUFFER_SPACE) 57 return 0; 58 fatal("%s: %s", __func__, ssh_err(ret)); 59 } 60 61 int buffer_get_ret(Buffer * buffer,void * buf,u_int len)62 buffer_get_ret(Buffer *buffer, void *buf, u_int len) 63 { 64 int ret; 65 66 if ((ret = sshbuf_get(buffer, buf, len)) != 0) { 67 error("%s: %s", __func__, ssh_err(ret)); 68 return -1; 69 } 70 return 0; 71 } 72 73 void buffer_get(Buffer * buffer,void * buf,u_int len)74 buffer_get(Buffer *buffer, void *buf, u_int len) 75 { 76 if (buffer_get_ret(buffer, buf, len) == -1) 77 fatal("%s: buffer error", __func__); 78 } 79 80 int buffer_consume_ret(Buffer * buffer,u_int bytes)81 buffer_consume_ret(Buffer *buffer, u_int bytes) 82 { 83 int ret = sshbuf_consume(buffer, bytes); 84 85 if (ret == 0) 86 return 0; 87 if (ret == SSH_ERR_MESSAGE_INCOMPLETE) 88 return -1; 89 fatal("%s: %s", __func__, ssh_err(ret)); 90 } 91 92 void buffer_consume(Buffer * buffer,u_int bytes)93 buffer_consume(Buffer *buffer, u_int bytes) 94 { 95 if (buffer_consume_ret(buffer, bytes) == -1) 96 fatal("%s: buffer error", __func__); 97 } 98 99 int buffer_consume_end_ret(Buffer * buffer,u_int bytes)100 buffer_consume_end_ret(Buffer *buffer, u_int bytes) 101 { 102 int ret = sshbuf_consume_end(buffer, bytes); 103 104 if (ret == 0) 105 return 0; 106 if (ret == SSH_ERR_MESSAGE_INCOMPLETE) 107 return -1; 108 fatal("%s: %s", __func__, ssh_err(ret)); 109 } 110 111 void buffer_consume_end(Buffer * buffer,u_int bytes)112 buffer_consume_end(Buffer *buffer, u_int bytes) 113 { 114 if (buffer_consume_end_ret(buffer, bytes) == -1) 115 fatal("%s: buffer error", __func__); 116 } 117 118 119