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-rw-r--r--source3/client/mount.cifs.c123
1 files changed, 54 insertions, 69 deletions
diff --git a/source3/client/mount.cifs.c b/source3/client/mount.cifs.c
index fdee87ae27..1b67a5e8e6 100644
--- a/source3/client/mount.cifs.c
+++ b/source3/client/mount.cifs.c
@@ -1,6 +1,7 @@
/*
Mount helper utility for Linux CIFS VFS (virtual filesystem) client
- Copyright (C) 2003,2005 Steve French (sfrench@us.ibm.com)
+ Copyright (C) 2003,2008 Steve French (sfrench@us.ibm.com)
+ Copyright (C) 2008 Jeremy Allison (jra@samba.org)
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
@@ -67,6 +68,13 @@
#define CONST_DISCARD(type, ptr) ((type) ((void *) (ptr)))
+#ifndef SAFE_FREE
+#define SAFE_FREE(x) do { if ((x) != NULL) {free(x); x=NULL;} } while(0)
+#endif
+
+#define MOUNT_PASSWD_SIZE 64
+#define DOMAIN_SIZE 64
+
const char *thisprogram;
int verboseflag = 0;
static int got_password = 0;
@@ -152,10 +160,7 @@ static void mount_cifs_usage(void)
printf("\nTo display the version number of the mount helper:");
printf("\n\t%s -V\n",thisprogram);
- if(mountpassword) {
- memset(mountpassword,0,64);
- free(mountpassword);
- }
+ SAFE_FREE(mountpassword);
exit(1);
}
@@ -214,16 +219,13 @@ static int open_cred_file(char * file_name)
if(length > 4086) {
printf("mount.cifs failed due to malformed username in credentials file");
memset(line_buf,0,4096);
- if(mountpassword) {
- memset(mountpassword,0,64);
- }
exit(1);
} else {
got_user = 1;
user_name = (char *)calloc(1 + length,1);
/* BB adding free of user_name string before exit,
not really necessary but would be cleaner */
- strncpy(user_name,temp_val, length);
+ strlcpy(user_name,temp_val, length+1);
}
}
} else if (strncasecmp("password",line_buf+i,8) == 0) {
@@ -231,26 +233,23 @@ static int open_cred_file(char * file_name)
if(temp_val) {
/* go past equals sign */
temp_val++;
- for(length = 0;length<65;length++) {
+ for(length = 0;length<MOUNT_PASSWD_SIZE+1;length++) {
if ((temp_val[length] == '\n')
|| (temp_val[length] == '\0')) {
break;
}
}
- if(length > 64) {
+ if(length > MOUNT_PASSWD_SIZE) {
printf("mount.cifs failed: password in credentials file too long\n");
memset(line_buf,0, 4096);
- if(mountpassword) {
- memset(mountpassword,0,64);
- }
exit(1);
} else {
if(mountpassword == NULL) {
- mountpassword = (char *)calloc(65,1);
+ mountpassword = (char *)calloc(MOUNT_PASSWD_SIZE+1,1);
} else
- memset(mountpassword,0,64);
+ memset(mountpassword,0,MOUNT_PASSWD_SIZE);
if(mountpassword) {
- strncpy(mountpassword,temp_val,length);
+ strlcpy(mountpassword,temp_val,MOUNT_PASSWD_SIZE+1);
got_password = 1;
}
}
@@ -262,25 +261,22 @@ static int open_cred_file(char * file_name)
temp_val++;
if(verboseflag)
printf("\nDomain %s\n",temp_val);
- for(length = 0;length<65;length++) {
+ for(length = 0;length<DOMAIN_SIZE+1;length++) {
if ((temp_val[length] == '\n')
|| (temp_val[length] == '\0')) {
break;
}
}
- if(length > 64) {
+ if(length > DOMAIN_SIZE) {
printf("mount.cifs failed: domain in credentials file too long\n");
- if(mountpassword) {
- memset(mountpassword,0,64);
- }
exit(1);
} else {
if(domain_name == NULL) {
- domain_name = (char *)calloc(65,1);
+ domain_name = (char *)calloc(DOMAIN_SIZE+1,1);
} else
- memset(domain_name,0,64);
+ memset(domain_name,0,DOMAIN_SIZE);
if(domain_name) {
- strncpy(domain_name,temp_val,length);
+ strlcpy(domain_name,temp_val,DOMAIN_SIZE+1);
got_domain = 1;
}
}
@@ -289,10 +285,7 @@ static int open_cred_file(char * file_name)
}
fclose(fs);
- if(line_buf) {
- memset(line_buf,0,4096);
- free(line_buf);
- }
+ SAFE_FREE(line_buf);
return 0;
}
@@ -303,9 +296,9 @@ static int get_password_from_file(int file_descript, char * filename)
char c;
if(mountpassword == NULL)
- mountpassword = (char *)calloc(65,1);
+ mountpassword = (char *)calloc(MOUNT_PASSWD_SIZE+1,1);
else
- memset(mountpassword, 0, 64);
+ memset(mountpassword, 0, MOUNT_PASSWD_SIZE);
if (mountpassword == NULL) {
printf("malloc failed\n");
@@ -322,11 +315,10 @@ static int get_password_from_file(int file_descript, char * filename)
}
/* else file already open and fd provided */
- for(i=0;i<64;i++) {
+ for(i=0;i<MOUNT_PASSWD_SIZE;i++) {
rc = read(file_descript,&c,1);
if(rc < 0) {
printf("mount.cifs failed. Error %s reading password file\n",strerror(errno));
- memset(mountpassword,0,64);
if(filename != NULL)
close(file_descript);
exit(1);
@@ -343,8 +335,9 @@ static int get_password_from_file(int file_descript, char * filename)
mountpassword[i] = c;
}
}
- if((i == 64) && (verboseflag)) {
- printf("\nWarning: password longer than 64 characters specified in cifs password file");
+ if((i == MOUNT_PASSWD_SIZE) && (verboseflag)) {
+ printf("\nWarning: password longer than %d characters specified in cifs password file",
+ MOUNT_PASSWD_SIZE);
}
got_password = 1;
if(filename != NULL) {
@@ -431,13 +424,13 @@ static int parse_options(char ** optionsp, int * filesys_flags)
if(percent_char) {
*percent_char = ',';
if(mountpassword == NULL)
- mountpassword = (char *)calloc(65,1);
+ mountpassword = (char *)calloc(MOUNT_PASSWD_SIZE+1,1);
if(mountpassword) {
if(got_password)
printf("\nmount.cifs warning - password specified twice\n");
got_password = 1;
percent_char++;
- strncpy(mountpassword, percent_char,64);
+ strlcpy(mountpassword, percent_char,MOUNT_PASSWD_SIZE+1);
/* remove password from username */
while(*percent_char != 0) {
*percent_char = ',';
@@ -711,7 +704,7 @@ nocopy:
out_len = strlen(out);
}
- free(*optionsp);
+ SAFE_FREE(*optionsp);
*optionsp = out;
return 0;
}
@@ -739,7 +732,7 @@ static void check_for_comma(char ** ppasswrd)
if(number_of_commas == 0)
return;
- if(number_of_commas > 64) {
+ if(number_of_commas > MOUNT_PASSWD_SIZE) {
/* would otherwise overflow the mount options buffer */
printf("\nInvalid password. Password contains too many commas.\n");
return;
@@ -758,7 +751,7 @@ static void check_for_comma(char ** ppasswrd)
}
new_pass_buf[len+number_of_commas] = 0;
- free(*ppasswrd);
+ SAFE_FREE(*ppasswrd);
*ppasswrd = new_pass_buf;
return;
@@ -889,8 +882,8 @@ static char * parse_server(char ** punc_name)
return NULL;
}
*share = '/';
- strncpy((*punc_name)+2,unc_name,length);
- free(unc_name);
+ strlcpy((*punc_name)+2,unc_name,length+1);
+ SAFE_FREE(unc_name);
unc_name = *punc_name;
unc_name[length+2] = 0;
goto continue_unc_parsing;
@@ -1116,9 +1109,6 @@ int main(int argc, char ** argv)
MOUNT_CIFS_VERSION_MAJOR,
MOUNT_CIFS_VERSION_MINOR,
MOUNT_CIFS_VENDOR_SUFFIX);
- if(mountpassword) {
- memset(mountpassword,0,64);
- }
exit (0);
case 'w':
flags &= ~MS_RDONLY;
@@ -1179,10 +1169,10 @@ int main(int argc, char ** argv)
break;
case 'p':
if(mountpassword == NULL)
- mountpassword = (char *)calloc(65,1);
+ mountpassword = (char *)calloc(MOUNT_PASSWD_SIZE+1,1);
if(mountpassword) {
got_password = 1;
- strncpy(mountpassword,optarg,64);
+ strlcpy(mountpassword,optarg,MOUNT_PASSWD_SIZE+1);
}
break;
case 'S':
@@ -1206,7 +1196,7 @@ int main(int argc, char ** argv)
if(mountpassword == NULL)
mountpassword = (char *)calloc(65,1);
if(mountpassword) {
- strncpy(mountpassword,getenv("PASSWD"),64);
+ strlcpy(mountpassword,getenv("PASSWD"),MOUNT_PASSWD_SIZE);
got_password = 1;
}
} else if (getenv("PASSWD_FD")) {
@@ -1272,7 +1262,14 @@ int main(int argc, char ** argv)
}
if(got_password == 0) {
- mountpassword = getpass("Password: "); /* BB obsolete */
+ char *tmp_pass = getpass("Password: "); /* BB obsolete sys call but
+ no good replacement yet. */
+ mountpassword = (char *)calloc(MOUNT_PASSWD_SIZE+1,1);
+ if (!tmp_pass || !mountpassword) {
+ printf("Password not entered, exiting\n");
+ return -1;
+ }
+ strlcpy(mountpassword, tmp_pass, MOUNT_PASSWD_SIZE+1);
got_password = 1;
}
/* FIXME launch daemon (handles dfs name resolution and credential change)
@@ -1296,9 +1293,8 @@ mount_retry:
optlen += strlen(ipaddr) + 4;
if(mountpassword)
optlen += strlen(mountpassword) + 6;
- if(options)
- free(options);
- options_size = optlen + 10 + 64;
+ SAFE_FREE(options);
+ options_size = optlen + 10 + DOMAIN_SIZE;
options = (char *)malloc(options_size /* space for commas in password */ + 8 /* space for domain= , domain name itself was counted as part of the length username string above */);
if(options == NULL) {
@@ -1420,8 +1416,7 @@ mount_retry:
mountent.mnt_passno = 0;
rc = addmntent(pmntfile,&mountent);
endmntent(pmntfile);
- if(mountent.mnt_opts)
- free(mountent.mnt_opts);
+ SAFE_FREE(mountent.mnt_opts);
} else {
printf("could not update mount table\n");
}
@@ -1431,22 +1426,12 @@ mount_exit:
if(mountpassword) {
int len = strlen(mountpassword);
memset(mountpassword,0,len);
- free(mountpassword);
- }
-
- if(options) {
- memset(options,0,optlen);
- free(options);
- }
-
- if(orgoptions) {
- memset(orgoptions,0,orgoptlen);
- free(orgoptions);
- }
- if(resolved_path) {
- free(resolved_path);
+ SAFE_FREE(mountpassword);
}
- free(share_name);
+ SAFE_FREE(options);
+ SAFE_FREE(orgoptions);
+ SAFE_FREE(resolved_path);
+ SAFE_FREE(share_name);
return rc;
}
generated by cgit (git 2.34.1) at 2024-11-29 04:41:50 +0000