diff options
Diffstat (limited to 'g10/parse-packet.c')
| -rw-r--r-- | g10/parse-packet.c | 107 |
1 files changed, 99 insertions, 8 deletions
diff --git a/g10/parse-packet.c b/g10/parse-packet.c index 29e4fc4e6..5bee45b32 100644 --- a/g10/parse-packet.c +++ b/g10/parse-packet.c @@ -1,14 +1,14 @@ /* parse-packet.c - read packets * Copyright (C) 1998 Free Software Foundation, Inc. * - * This file is part of GNUPG. + * This file is part of GnuPG. * - * GNUPG is free software; you can redistribute it and/or modify + * GnuPG is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * - * GNUPG is distributed in the hope that it will be useful, + * GnuPG 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 General Public License for more details. @@ -39,7 +39,11 @@ static int mpi_print_mode = 0; static int list_mode = 0; static int parse( IOBUF inp, PACKET *pkt, int reqtype, - ulong *retpos, int *skip, IOBUF out, int do_skip ); + ulong *retpos, int *skip, IOBUF out, int do_skip + #ifdef DEBUG_PARSE_PACKET + ,const char *dbg_w, const char *dbg_f, int dbg_l + #endif + ); static int copy_packet( IOBUF inp, IOBUF out, int pkttype, unsigned long pktlen ); static void skip_packet( IOBUF inp, int pkttype, unsigned long pktlen ); @@ -119,6 +123,18 @@ unknown_pubkey_warning( int algo ) * Note: The function may return an error and a partly valid packet; * caller must free this packet. */ +#ifdef DEBUG_PARSE_PACKET +int +dbg_parse_packet( IOBUF inp, PACKET *pkt, const char *dbg_f, int dbg_l ) +{ + int skip, rc; + + do { + rc = parse( inp, pkt, 0, NULL, &skip, NULL, 0, "parse", dbg_f, dbg_l ); + } while( skip ); + return rc; +} +#else int parse_packet( IOBUF inp, PACKET *pkt ) { @@ -129,10 +145,24 @@ parse_packet( IOBUF inp, PACKET *pkt ) } while( skip ); return rc; } +#endif /**************** * Like parse packet, but only return packets of the given type. */ +#ifdef DEBUG_PARSE_PACKET +int +dbg_search_packet( IOBUF inp, PACKET *pkt, int pkttype, ulong *retpos, + const char *dbg_f, int dbg_l ) +{ + int skip, rc; + + do { + rc = parse( inp, pkt, pkttype, retpos, &skip, NULL, 0, "search", dbg_f, dbg_l ); + } while( skip ); + return rc; +} +#else int search_packet( IOBUF inp, PACKET *pkt, int pkttype, ulong *retpos ) { @@ -143,10 +173,24 @@ search_packet( IOBUF inp, PACKET *pkt, int pkttype, ulong *retpos ) } while( skip ); return rc; } +#endif /**************** * Copy all packets from INP to OUT, thereby removing unused spaces. */ +#ifdef DEBUG_PARSE_PACKET +int +dbg_copy_all_packets( IOBUF inp, IOBUF out, + const char *dbg_f, int dbg_l ) +{ + PACKET pkt; + int skip, rc=0; + do { + init_packet(&pkt); + } while( !(rc = parse( inp, &pkt, 0, NULL, &skip, out, 0, "copy", dbg_f, dbg_l ))); + return rc; +} +#else int copy_all_packets( IOBUF inp, IOBUF out ) { @@ -157,11 +201,28 @@ copy_all_packets( IOBUF inp, IOBUF out ) } while( !(rc = parse( inp, &pkt, 0, NULL, &skip, out, 0 ))); return rc; } +#endif /**************** * Copy some packets from INP to OUT, thereby removing unused spaces. * Stop at offset STOPoff (i.e. don't copy packets at this or later offsets) */ +#ifdef DEBUG_PARSE_PACKET +int +dbg_copy_some_packets( IOBUF inp, IOBUF out, ulong stopoff, + const char *dbg_f, int dbg_l ) +{ + PACKET pkt; + int skip, rc=0; + do { + if( iobuf_tell(inp) >= stopoff ) + return 0; + init_packet(&pkt); + } while( !(rc = parse( inp, &pkt, 0, NULL, &skip, out, 0, + "some", dbg_f, dbg_l )) ); + return rc; +} +#else int copy_some_packets( IOBUF inp, IOBUF out, ulong stopoff ) { @@ -174,10 +235,26 @@ copy_some_packets( IOBUF inp, IOBUF out, ulong stopoff ) } while( !(rc = parse( inp, &pkt, 0, NULL, &skip, out, 0 )) ); return rc; } +#endif /**************** * Skip over N packets */ +#ifdef DEBUG_PARSE_PACKET +int +dbg_skip_some_packets( IOBUF inp, unsigned n, + const char *dbg_f, int dbg_l ) +{ + int skip, rc=0; + PACKET pkt; + + for( ;n && !rc; n--) { + init_packet(&pkt); + rc = parse( inp, &pkt, 0, NULL, &skip, NULL, 1, "skip", dbg_f, dbg_l ); + } + return rc; +} +#else int skip_some_packets( IOBUF inp, unsigned n ) { @@ -190,7 +267,7 @@ skip_some_packets( IOBUF inp, unsigned n ) } return rc; } - +#endif /**************** @@ -202,7 +279,11 @@ skip_some_packets( IOBUF inp, unsigned n ) */ static int parse( IOBUF inp, PACKET *pkt, int reqtype, ulong *retpos, - int *skip, IOBUF out, int do_skip ) + int *skip, IOBUF out, int do_skip +#ifdef DEBUG_PARSE_PACKET + ,const char *dbg_w, const char *dbg_f, int dbg_l +#endif + ) { int rc=0, c, ctb, pkttype, lenbytes; unsigned long pktlen; @@ -214,6 +295,7 @@ parse( IOBUF inp, PACKET *pkt, int reqtype, ulong *retpos, assert( !pkt->pkt.generic ); if( retpos ) *retpos = iobuf_tell(inp); + if( (ctb = iobuf_get(inp)) == -1 ) { rc = -1; goto leave; @@ -221,7 +303,8 @@ parse( IOBUF inp, PACKET *pkt, int reqtype, ulong *retpos, hdrlen=0; hdr[hdrlen++] = ctb; if( !(ctb & 0x80) ) { - log_error("%s: invalid packet (ctb=%02x)\n", iobuf_where(inp), ctb ); + log_error("%s: invalid packet (ctb=%02x) near %lu\n", + iobuf_where(inp), ctb, iobuf_tell(inp) ); rc = G10ERR_INVALID_PACKET; goto leave; } @@ -294,9 +377,16 @@ parse( IOBUF inp, PACKET *pkt, int reqtype, ulong *retpos, goto leave; } - if( DBG_PACKET ) + if( DBG_PACKET ) { + #ifdef DEBUG_PARSE_PACKET + log_debug("parse_packet(iob=%d): type=%d length=%lu%s (%s.%s.%d)\n", + iobuf_id(inp), pkttype, pktlen, new_ctb?" (new_ctb)":"", + dbg_w, dbg_f, dbg_l ); + #else log_debug("parse_packet(iob=%d): type=%d length=%lu%s\n", iobuf_id(inp), pkttype, pktlen, new_ctb?" (new_ctb)":"" ); + #endif + } pkt->pkttype = pkttype; rc = G10ERR_UNKNOWN_PACKET; /* default error */ switch( pkttype ) { @@ -384,6 +474,7 @@ copy_packet( IOBUF inp, IOBUF out, int pkttype, unsigned long pktlen ) return G10ERR_WRITE_FILE; /* write error */ } else if( !pktlen && pkttype == PKT_COMPRESSED ) { + log_debug("copy_packet: compressed!\n"); /* compressed packet, copy till EOF */ while( (n = iobuf_read( inp, buf, 100 )) != -1 ) if( iobuf_write(out, buf, n ) ) |