diff options
| -rw-r--r-- | source3/lib/util_ea.c | 126 | ||||
| -rw-r--r-- | source3/lib/util_ea.h | 36 | ||||
| -rw-r--r-- | source3/smbd/nttrans.c | 44 | ||||
| -rw-r--r-- | source3/smbd/trans2.c | 62 | ||||
| -rwxr-xr-x | source3/wscript_build | 3 |
5 files changed, 166 insertions, 105 deletions
diff --git a/source3/lib/util_ea.c b/source3/lib/util_ea.c new file mode 100644 index 0000000000..81684da4cb --- /dev/null +++ b/source3/lib/util_ea.c @@ -0,0 +1,126 @@ +/* + Unix SMB/CIFS implementation. + SMB Extended attribute buffer handling + Copyright (C) Jeremy Allison 2005-2013 + Copyright (C) Tim Prouty 2008 + + This program 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 3 of the License, or + (at your option) any later version. + + This program 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. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#include "includes.h" +#include "lib/util_ea.h" + +/**************************************************************************** + Read one EA list entry from the buffer. +****************************************************************************/ + +struct ea_list *read_ea_list_entry(TALLOC_CTX *ctx, const char *pdata, size_t data_size, size_t *pbytes_used) +{ + struct ea_list *eal = talloc_zero(ctx, struct ea_list); + uint16 val_len; + unsigned int namelen; + size_t converted_size; + + if (!eal) { + return NULL; + } + + if (data_size < 6) { + return NULL; + } + + eal->ea.flags = CVAL(pdata,0); + namelen = CVAL(pdata,1); + val_len = SVAL(pdata,2); + + if (4 + namelen + 1 + val_len > data_size) { + return NULL; + } + + /* Ensure the name is null terminated. */ + if (pdata[namelen + 4] != '\0') { + return NULL; + } + if (!pull_ascii_talloc(ctx, &eal->ea.name, pdata + 4, &converted_size)) { + DEBUG(0,("read_ea_list_entry: pull_ascii_talloc failed: %s", + strerror(errno))); + } + if (!eal->ea.name) { + return NULL; + } + + eal->ea.value = data_blob_talloc(eal, NULL, (size_t)val_len + 1); + if (!eal->ea.value.data) { + return NULL; + } + + memcpy(eal->ea.value.data, pdata + 4 + namelen + 1, val_len); + + /* Ensure we're null terminated just in case we print the value. */ + eal->ea.value.data[val_len] = '\0'; + /* But don't count the null. */ + eal->ea.value.length--; + + if (pbytes_used) { + *pbytes_used = 4 + namelen + 1 + val_len; + } + + DEBUG(10,("read_ea_list_entry: read ea name %s\n", eal->ea.name)); + dump_data(10, eal->ea.value.data, eal->ea.value.length); + + return eal; +} + +/**************************************************************************** + Read a list of EA names and data from an incoming data buffer. Create an ea_list with them. +****************************************************************************/ + +struct ea_list *read_nttrans_ea_list(TALLOC_CTX *ctx, const char *pdata, size_t data_size) +{ + struct ea_list *ea_list_head = NULL; + size_t offset = 0; + + if (data_size < 4) { + return NULL; + } + + while (offset + 4 <= data_size) { + size_t next_offset = IVAL(pdata,offset); + struct ea_list *eal = read_ea_list_entry(ctx, pdata + offset + 4, data_size - offset - 4, NULL); + + if (!eal) { + return NULL; + } + + DLIST_ADD_END(ea_list_head, eal, struct ea_list *); + if (next_offset == 0) { + break; + } + + /* Integer wrap protection for the increment. */ + if (offset + next_offset < offset) { + break; + } + + offset += next_offset; + + /* Integer wrap protection for while loop. */ + if (offset + 4 < offset) { + break; + } + + } + + return ea_list_head; +} diff --git a/source3/lib/util_ea.h b/source3/lib/util_ea.h new file mode 100644 index 0000000000..54423ac287 --- /dev/null +++ b/source3/lib/util_ea.h @@ -0,0 +1,36 @@ +/* + Unix SMB/CIFS implementation. + SMB Extended attribute buffer handling + Copyright (C) Jeremy Allison 2005-2013 + Copyright (C) Tim Prouty 2008 + + This program 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 3 of the License, or + (at your option) any later version. + + This program 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. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef __LIB_UTIL_EA_H__ +#define __LIB_UTIL_EA_H__ + +/**************************************************************************** + Read one EA list entry from a buffer. +****************************************************************************/ + +struct ea_list *read_ea_list_entry(TALLOC_CTX *ctx, const char *pdata, size_t data_size, size_t *pbytes_used); + +/**************************************************************************** + Read a list of EA names and data from an incoming data buffer. Create an ea_list with them. +****************************************************************************/ + +struct ea_list *read_nttrans_ea_list(TALLOC_CTX *ctx, const char *pdata, size_t data_size); + +#endif /* __LIB_UTIL_EA_H__ */ diff --git a/source3/smbd/nttrans.c b/source3/smbd/nttrans.c index bcba29a3e8..94be9f6d8d 100644 --- a/source3/smbd/nttrans.c +++ b/source3/smbd/nttrans.c @@ -29,6 +29,7 @@ #include "auth.h" #include "smbprofile.h" #include "libsmb/libsmb.h" +#include "lib/util_ea.h" extern const struct generic_mapping file_generic_mapping; @@ -966,49 +967,6 @@ NTSTATUS set_sd_blob(files_struct *fsp, uint8_t *data, uint32_t sd_len, } /**************************************************************************** - Read a list of EA names and data from an incoming data buffer. Create an ea_list with them. -****************************************************************************/ - -struct ea_list *read_nttrans_ea_list(TALLOC_CTX *ctx, const char *pdata, size_t data_size) -{ - struct ea_list *ea_list_head = NULL; - size_t offset = 0; - - if (data_size < 4) { - return NULL; - } - - while (offset + 4 <= data_size) { - size_t next_offset = IVAL(pdata,offset); - struct ea_list *eal = read_ea_list_entry(ctx, pdata + offset + 4, data_size - offset - 4, NULL); - - if (!eal) { - return NULL; - } - - DLIST_ADD_END(ea_list_head, eal, struct ea_list *); - if (next_offset == 0) { - break; - } - - /* Integer wrap protection for the increment. */ - if (offset + next_offset < offset) { - break; - } - - offset += next_offset; - - /* Integer wrap protection for while loop. */ - if (offset + 4 < offset) { - break; - } - - } - - return ea_list_head; -} - -/**************************************************************************** Reply to a NT_TRANSACT_CREATE call (needs to process SD's). ****************************************************************************/ diff --git a/source3/smbd/trans2.c b/source3/smbd/trans2.c index da0b1ea92c..2bff483d70 100644 --- a/source3/smbd/trans2.c +++ b/source3/smbd/trans2.c @@ -38,6 +38,7 @@ #include "smbprofile.h" #include "rpc_server/srv_pipe_hnd.h" #include "printing.h" +#include "lib/util_ea.h" #define DIR_ENTRY_SAFETY_MARGIN 4096 @@ -749,67 +750,6 @@ static struct ea_list *read_ea_name_list(TALLOC_CTX *ctx, const char *pdata, siz } /**************************************************************************** - Read one EA list entry from the buffer. -****************************************************************************/ - -struct ea_list *read_ea_list_entry(TALLOC_CTX *ctx, const char *pdata, size_t data_size, size_t *pbytes_used) -{ - struct ea_list *eal = talloc_zero(ctx, struct ea_list); - uint16 val_len; - unsigned int namelen; - size_t converted_size; - - if (!eal) { - return NULL; - } - - if (data_size < 6) { - return NULL; - } - - eal->ea.flags = CVAL(pdata,0); - namelen = CVAL(pdata,1); - val_len = SVAL(pdata,2); - - if (4 + namelen + 1 + val_len > data_size) { - return NULL; - } - - /* Ensure the name is null terminated. */ - if (pdata[namelen + 4] != '\0') { - return NULL; - } - if (!pull_ascii_talloc(ctx, &eal->ea.name, pdata + 4, &converted_size)) { - DEBUG(0,("read_ea_list_entry: pull_ascii_talloc failed: %s", - strerror(errno))); - } - if (!eal->ea.name) { - return NULL; - } - - eal->ea.value = data_blob_talloc(eal, NULL, (size_t)val_len + 1); - if (!eal->ea.value.data) { - return NULL; - } - - memcpy(eal->ea.value.data, pdata + 4 + namelen + 1, val_len); - - /* Ensure we're null terminated just in case we print the value. */ - eal->ea.value.data[val_len] = '\0'; - /* But don't count the null. */ - eal->ea.value.length--; - - if (pbytes_used) { - *pbytes_used = 4 + namelen + 1 + val_len; - } - - DEBUG(10,("read_ea_list_entry: read ea name %s\n", eal->ea.name)); - dump_data(10, eal->ea.value.data, eal->ea.value.length); - - return eal; -} - -/**************************************************************************** Read a list of EA names and data from an incoming data buffer. Create an ea_list with them. ****************************************************************************/ diff --git a/source3/wscript_build b/source3/wscript_build index f52197a1a3..569c63250e 100755 --- a/source3/wscript_build +++ b/source3/wscript_build @@ -67,7 +67,8 @@ LIB_SRC = ''' lib/fncall.c libads/krb5_errs.c lib/system_smbd.c lib/audit.c lib/tevent_wait.c - lib/idmap_cache.c''' + lib/idmap_cache.c + lib/util_ea.c''' LIB_UTIL_SRC = ''' lib/system.c |