Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 1 | /* $OpenBSD: buffer.c,v 1.36 2014/04/30 05:29:56 djm Exp $ */ |
| 2 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 3 | /* |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 4 | * Copyright (c) 2012 Damien Miller <djm@mindrot.org> |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 5 | * |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 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. |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 17 | */ |
| 18 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 19 | /* Emulation wrappers for legacy OpenSSH buffer API atop sshbuf */ |
| 20 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 21 | #include "includes.h" |
| 22 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 23 | #include <sys/types.h> |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 24 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 25 | #include "buffer.h" |
| 26 | #include "log.h" |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 27 | #include "ssherr.h" |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 28 | |
| 29 | void |
| 30 | buffer_append(Buffer *buffer, const void *data, u_int len) |
| 31 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 32 | int ret; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 33 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 34 | if ((ret = sshbuf_put(buffer, data, len)) != 0) |
| 35 | fatal("%s: %s", __func__, ssh_err(ret)); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 36 | } |
| 37 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 38 | void * |
| 39 | buffer_append_space(Buffer *buffer, u_int len) |
| 40 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 41 | int ret; |
| 42 | u_char *p; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 43 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 44 | if ((ret = sshbuf_reserve(buffer, len, &p)) != 0) |
| 45 | fatal("%s: %s", __func__, ssh_err(ret)); |
| 46 | return p; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 47 | } |
| 48 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 49 | int |
| 50 | buffer_check_alloc(Buffer *buffer, u_int len) |
| 51 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 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)); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 59 | } |
| 60 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 61 | int |
| 62 | buffer_get_ret(Buffer *buffer, void *buf, u_int len) |
| 63 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 64 | int ret; |
| 65 | |
| 66 | if ((ret = sshbuf_get(buffer, buf, len)) != 0) { |
| 67 | error("%s: %s", __func__, ssh_err(ret)); |
| 68 | return -1; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 69 | } |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 70 | return 0; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | void |
| 74 | buffer_get(Buffer *buffer, void *buf, u_int len) |
| 75 | { |
| 76 | if (buffer_get_ret(buffer, buf, len) == -1) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 77 | fatal("%s: buffer error", __func__); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 78 | } |
| 79 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 80 | int |
| 81 | buffer_consume_ret(Buffer *buffer, u_int bytes) |
| 82 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 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)); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | void |
| 93 | buffer_consume(Buffer *buffer, u_int bytes) |
| 94 | { |
| 95 | if (buffer_consume_ret(buffer, bytes) == -1) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 96 | fatal("%s: buffer error", __func__); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 97 | } |
| 98 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 99 | int |
| 100 | buffer_consume_end_ret(Buffer *buffer, u_int bytes) |
| 101 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 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)); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 109 | } |
| 110 | |
| 111 | void |
| 112 | buffer_consume_end(Buffer *buffer, u_int bytes) |
| 113 | { |
| 114 | if (buffer_consume_end_ret(buffer, bytes) == -1) |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame] | 115 | fatal("%s: buffer error", __func__); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 116 | } |
| 117 | |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 118 | |