diff options
Diffstat (limited to 'comm/third_party/libotr/src/serial.h')
| -rw-r--r-- | comm/third_party/libotr/src/serial.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/comm/third_party/libotr/src/serial.h b/comm/third_party/libotr/src/serial.h new file mode 100644 index 0000000000..cd2442b332 --- /dev/null +++ b/comm/third_party/libotr/src/serial.h @@ -0,0 +1,107 @@ +/* + * Off-the-Record Messaging library + * Copyright (C) 2004-2012 Ian Goldberg, Rob Smits, Chris Alexander, + * Willy Lew, Lisa Du, Nikita Borisov + * <otr@cypherpunks.ca> + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of version 2.1 of the GNU Lesser General + * Public License as published by the Free Software Foundation. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#ifndef __SERIAL_H__ +#define __SERIAL_H__ + +#undef DEBUG + +#ifdef DEBUG + +#include <stdio.h> + +#define debug_data(t,b,l) do { const unsigned char *data = (b); size_t i; \ + fprintf(stderr, "%s: ", (t)); \ + for(i=0;i<(l);++i) { \ + fprintf(stderr, "%02x", data[i]); \ + } \ + fprintf(stderr, "\n"); \ + } while(0) + +#define debug_int(t,b) do { const unsigned char *data = (b); \ + unsigned int v = \ + (((unsigned int)data[0]) << 24) | (data[1] << 16) | (data[2] << 8) | data[3]; \ + fprintf(stderr, "%s: %u (0x%x)\n", (t), v, v); \ + } while(0) + +#else +#define debug_data(t,b,l) +#define debug_int(t,b) +#endif + +#define write_int(x) do { \ + bufp[0] = ((x) >> 24) & 0xff; \ + bufp[1] = ((x) >> 16) & 0xff; \ + bufp[2] = ((x) >> 8) & 0xff; \ + bufp[3] = (x) & 0xff; \ + bufp += 4; lenp -= 4; \ + } while(0) + +#define write_mpi(x,nx,dx) do { \ + write_int(nx); \ + gcry_mpi_print(format, bufp, lenp, NULL, (x)); \ + debug_data((dx), bufp, (nx)); \ + bufp += (nx); lenp -= (nx); \ + } while(0) + +#define require_len(l) do { \ + if (lenp < (l)) goto invval; \ + } while(0) + +#define read_int(x) do { \ + require_len(4); \ + (x) = (((unsigned int)bufp[0]) << 24) | (bufp[1] << 16) | (bufp[2] << 8) | bufp[3]; \ + bufp += 4; lenp -= 4; \ + } while(0) + +#define read_mpi(x) do { \ + size_t mpilen; \ + read_int(mpilen); \ + if (mpilen) { \ + require_len(mpilen); \ + gcry_mpi_scan(&(x), GCRYMPI_FMT_USG, bufp, mpilen, NULL); \ + } else { \ + (x) = gcry_mpi_set_ui(NULL, 0); \ + } \ + bufp += mpilen; lenp -= mpilen; \ + } while(0) + +/* Write version and msg type into bufp*/ +#define write_header(version, msgtype) do { \ + bufp[0] = 0x00; \ + bufp[1] = version & 0xff; \ + bufp[2] = msgtype; \ + debug_data("Header", bufp, 3); \ + bufp += 3; lenp -= 3; \ + } while(0) + +/* Verify msg header is v1, v2 or v3 and has type x, +* increment bufp past msg header */ +#define skip_header(x) do { \ + require_len(3); \ + if ((bufp[0] != 0x00) || (bufp[2] != x)) \ + goto invval; \ + if ((bufp[1] == 0x01) || (bufp[1] == 0x02) || \ + (bufp[1] == 0x03)) { \ + bufp += 3; lenp -= 3; \ + } else goto invval; \ + } while(0) + +#endif |