def CreateTgz(Archive, Filelist):
"""Create a .tgz of the listed files, but take care with ../ files.
Return 0 on success, error code on error."""
if not Util.CanWrite(os.environ["HOME"], os.geteuid(), os.getegid(), 0):
CgiUtil.TermError("Can't write.", "No write permissions.",
"create backup", CgiUtil.FileDetails("home directory",
os.environ["HOME"]), "Check file permissions in home directory.")
Files = []
Parents = []
for Filename in Filelist:
SrcFn = os.path.join(os.environ["HOME"], Filename)
if os.path.isfile(SrcFn):
if (Filename[:len(Dict["Parent"])] == Dict["Parent"]) and \
(Filename[:len(Dict["Home"])] != Dict["Home"]):
try:
os.mkdir(os.path.join(os.environ["HOME"], "%(Parent)s"))
except OSError:
pass
NewFilename = "%(Parent)s" + Filename[len(Dict["Parent"]):]
DstFn = os.path.join(os.environ["HOME"], NewFilename)
Parents.append((SrcFn, DstFn))
os.rename(SrcFn, DstFn)
Files.append(NewFilename)
else:
Files.append(Filename)
TarCmd = [PVars[("NoOverride", "WhichTar")], "-C", os.environ["HOME"],
"-czf", Archive] + Files
try:
Util.RunTask(TarCmd)
except OSError, ( eno, estr ):
CgiUtil.TermError("CreateTgz failed.", "Error: %s (%d)" % (estr, eno),
"create backup", " ".join(TarCmd),
"Check file permissions in home directory.")
def ReadTgz(Archive):
"Return the files listed in an archive."
TarCmd = [PVars[("NoOverride", "WhichTar")], "-C", os.environ["HOME"],
"-tzf", Archive]
Files = Util.RunTask(TarCmd)
for i in range(len(Files)):
Files[i] = Files[i].strip()
return Files
def ExtractTgz(Archive):
"""Extract all from a .tgz, but take care with ../ files.
Return file list on success, None on error."""
TarCmd = [PVars[("NoOverride", "WhichTar")], "-C", os.environ["HOME"],
"-xzf", Archive]
try:
Util.RunTask(TarCmd)
except OSError:
return None
Files = ReadTgz(Archive)
for i in range(len(Files)):
if Files[i][:10] == "%(Parent)s":
NewFilename = Dict["Parent"] + Files[i][10:]
SrcFn = os.path.join(os.environ["HOME"], Files[i])
DstFn = os.path.join(os.environ["HOME"], NewFilename)
os.rename(SrcFn, DstFn)
Files[i] = NewFilename
try:
os.rmdir(os.path.join(os.environ["HOME"], "%(Parent)s"))
except OSError:
pass
return Files
def Release(QueryString):
"""Release the message represented in the QueryString.
QueryString is in one of two formats, real users MAY confirm with:
<UID>.<confirm_cookie>
Virtual users MUST confirm with:
<UID>&<recipient_address>&<confirm_cookie>
Where <UID> is the UID of the TMDA account, <recipient_address> is the untagged
address of the original message recipient, and <confirm_cookie> is used to find
and validate the pending email in question."""
# Prepare the traceback in case of uncaught exception
MyCgiTb.ErrTemplate = "prog_err2.html"
CgiUtil.ErrTemplate = "error2.html"
try:
UID, Recipient, Cookie = QueryString.split("&")
UID = int(UID)
OldStyle = 0
# Get base address from Recipient
RecipUser, RecipDomain = Recipient.split("@")
User = RecipUser.split('-')[0] + "@" + RecipDomain
except (ValueError, KeyError):
try:
# Check for old-style format
UID, Cookie = QueryString.split(".", 1)
UID = int(UID)
User = pwd.getpwuid(UID)[0]
OldStyle = 1
except (ValueError, KeyError):
CgiUtil.TermError(
"Unable to parse query string.",
"Program error / corrupted link.", "locate pending e-mail", "",
"""Please check the link you followed and
make sure that it is typed in exactly as it was sent to you.""")
try:
# Get real user from UID
Timestamp, PID, HMAC = Cookie.split(".")
except ValueError:
CgiUtil.TermError(
"Unable to parse query string.", "Program error / corrupted link.",
"locate pending e-mail", "",
"""Please check the link you followed and
make sure that it is typed in exactly as it was sent to you.""")
MsgID = "%s.%s.msg" % (Timestamp, PID)
# Check to make sure they're not trying to access anything other than email
if not re.compile("^\d+\.\d+\.msg$").search(MsgID):
CgiUtil.TermError("<tt>%s.%s.%s</tt> is not a valid message ID." % \
(Timestamp, PID, HMAC), "Program error / corrupted link.",
"retrieve pending e-mail", "", """Please check the link you followed and
make sure that it is typed in exactly as it was sent to you.""")
# Set up the user's home directory.
try:
os.seteuid(0)
os.setegid(0)
os.setuid(0)
except OSError:
pass
try:
if os.environ.has_key("TMDA_VLOOKUP") and not OldStyle:
VLookup = \
CgiUtil.ParseString(os.environ["TMDA_VLOOKUP"], User )
List = Util.RunTask(VLookup[1:])
Sandbox = {"User": User}
Filename = os.path.join("stubs", "%s.py" % VLookup[0])
try:
execfile(Filename, Sandbox)
except IOError:
CgiUtil.TermError(
"Can't load virtual user stub.",
"Cannot execute %s" % Filename, "execute stub",
"TMDA_VLOOKUP = %s" % os.environ["TMDA_VLOOKUP"],
"""Contact this message's sender by an alternate means and inform them
of this error, or try confirming your message using an alternate method.""")
Home, UID, GID = Sandbox["getuserparams"](List)[0:3]
else:
Home, UID, GID = Util.getuserparams(pwd.getpwuid(UID)[0])
except KeyError:
CgiUtil.TermError(
"No such user", "User %s not found" % User, "find user %s" % User,
"",
"""Contact this message's sender by an alternate means and inform them
of this error, or try confirming your message using an alternate method.""")
if UID < 2:
PasswordRecord = pwd.getpwnam(os.environ["TMDA_VUSER"])
UID = PasswordRecord[2]
GID = PasswordRecord[3]
if not int(UID):
CgiUtil.TermError(
"TMDA_VUSER is UID 0.", "It is not safe to run "
"tmda-cgi as root.", "set euid",
"TMDA_VUSER = %s" % os.environ["TMDA_VUSER"],
"""Contact this message's sender by an alternate means and inform them
of this error, or try confirming your message using an alternate method.""")
# We now have the home directory and the User. Set this in the environment.
os.environ["USER"] = User
os.environ["LOGNAME"] = User
os.environ["HOME"] = Home
# Is there a TMDARC variable?
if os.environ.has_key("TMDARC"):
# Yes, replace it
os.environ["TMDARC"] = os.environ["TMDARC"].replace(
"/~/", "/%s/" % User)
# Try to change users
try:
os.seteuid(0)
os.setegid(0)
os.setgid(int(GID))
os.setuid(int(UID))
except OSError:
pass
# Now that we know who we are, get our defaults
try:
from TMDA import Defaults
except Errors.ConfigError:
CgiUtil.TermError(
"Confirm Failed",
"Old-style URL is not compatible with virtual users",
"use incompatible URL", "", """Contact this message's sender by an
alternate means and inform them of this error, or try confirming your message
using an alternate method.""")
from TMDA import Pending
from TMDA import Cookie
try:
Defaults.CRYPT_KEY
except AttributeError:
CgiUtil.TermError(
"Could not read CRYPT_KEY.",
"CRYPT_KEY can not be read by group %d." % os.getegid(),
"read CRYPT_KEY", "ALLOW_MODE_640 = %d<br>%s" %
(Defaults.ALLOW_MODE_640,
CgiUtil.FileDetails("Cryptography key", Defaults.CRYPT_KEY_FILE)),
"""Any of the following solutions:<br>
1. Place <tt>%s</tt> in any of the groups that user %d belongs to.<br>
2. Do all three of the following:<br>
• Place <tt>%s</tt> in group %d.<br>
• Assign permissions 640 to <tt>%s</tt>.<br>
• Set ALLOW_MODE_640 = 1 in your configuration file.<br>
3. Disable URL confirmation in your confirmation template.""" %
(Defaults.CRYPT_KEY_FILE, os.geteuid(), Defaults.CRYPT_KEY_FILE,
os.getegid(), Defaults.CRYPT_KEY_FILE))
# Validate the HMAC
if Cookie.confirmationmac(Timestamp, PID, "accept") != HMAC:
CgiUtil.TermError("<tt>%s.%s.%s</tt> is not a valid message ID." % \
(Timestamp, PID, HMAC), "Program error / corrupted link.",
"retrieve pending e-mail", "",
"Recheck link or contact TMDA programmers.")
# Read in e-mail
try:
MsgObj = Pending.Message(MsgID)
except Errors.MessageError:
CgiUtil.TermError("Message could not be fetched.",
"Message has already been released or deleted.",
"retrieve pending e-mail", "",
"Inquire with recipient about e-mail.")
T = Template.Template("released.html")
# Fetch row
Row = T["Row"]
# Generate header rows
for Header in Defaults.SUMMARY_HEADERS:
T["Name"] = Header.capitalize()
T["Value"] = CgiUtil.Escape(MsgObj.msgobj[Header])
Row.Add()
# Can we add this address to a do-not-confirm-again list?
if Defaults.CONFIRM_APPEND:
ConfirmAddr = Util.confirm_append_address \
(
parseaddr(MsgObj.msgobj["x-primary-address"])[1],
parseaddr(MsgObj.msgobj["return-path"])[1]
)
if ConfirmAddr:
Util.append_to_file(ConfirmAddr, Defaults.CONFIRM_APPEND)
T["Address"] = ConfirmAddr
else:
T["Future"]
else:
T["Future"]
print T
# Make sure release does not write to PENDING_RELEASE_APPEND
Defaults.PENDING_RELEASE_APPEND = None
MsgObj.release()
def __init__(self, Form):
"Reload an existing SID or create a new one."
global Defaults
# Existing, valid looking session?
if Form.has_key("SID") and \
re.compile("^[a-zA-Z0-9]{8}$").search(Form["SID"].value):
# Provide SID to templates
Template.Template.Dict["SID"] = self.SID = Form["SID"].value
# Resurrect session
try:
self.__suid__("web")
Filename = os.environ["TMDA_SESSION_PREFIX"] + self.SID
if os.stat(Filename)[4] != os.geteuid():
CgiUtil.TermError(
"CGI_USER does not own session file.",
"Something suspicious is going on here. This should not happen.",
"open file",
CgiUtil.FileDetails("Session data",
Filename), "No recommendation.")
try:
F = open(Filename)
self.Vars = pickle.load(F)
F.close()
except (IOError, EOFError):
self.Vars = {}
# Make sure the session has not been hijacked
if os.environ["REMOTE_ADDR"] != self.Vars["IP"]:
CgiUtil.TermError(
"User's IP address has changed.",
"Your IP address has changed. This is not allowed.",
"read session data", "%s->%s" %
(self.Vars["IP"], os.environ["REMOTE_ADDR"]),
'<a href="%s">Log back in</a>.' %
os.environ["SCRIPT_NAME"])
# Are they logging out?
if Form.has_key("cmd") and (Form["cmd"].value == "logout"):
os.unlink(Filename)
return
# Touch session file to keep it from getting cleaned too soon
os.utime(Filename, None)
# Is there a TMDARC variable?
if os.environ.has_key("TMDARC"):
# Yes, replace it
os.environ["TMDARC"] = os.environ["TMDARC"].replace(
"/~/", "/%s/" % self.Vars["User"])
# Load system defaults
self.LoadSysDefaults()
# Become the user
self.BecomeUser()
# Done!
return
# Failed to resurrect session, fall through to make new SID
except (IOError, OSError):
pass
# New session
SessionChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" \
"0123456789"
self.SID = ""
for i in range(8):
self.SID += SessionChars[self.Rands.randrange(len(SessionChars))]
Template.Template.Dict["SID"] = self.SID
self.Vars = {}
# Are they logging in?
if not Form.has_key("user"):
Template.Template.Dict["ErrMsg"] = "No user name supplied."
return
if not Form.has_key("password"):
Template.Template.Dict["ErrMsg"] = "No password supplied."
return
# Get IP, User, UID, & Home directory
self.Vars["IP"] = os.environ["REMOTE_ADDR"]
self.Vars["User"] = Form["user"].value.lower()
self.__suid__("root")
try:
if os.environ.has_key("TMDA_VLOOKUP"):
VLookup = \
CgiUtil.ParseString(os.environ["TMDA_VLOOKUP"], self.Vars["User"])
List = Util.RunTask(VLookup[1:])
Sandbox = {"User": self.Vars["User"]}
Filename = os.path.join("stubs", "%s.py" % VLookup[0])
try:
execfile(Filename, Sandbox)
except IOError:
CgiUtil.TermError(
"Can't load virtual user stub.",
"Cannot execute %s" % Filename, "execute stub",
"TMDA_VLOOKUP = %s" % os.environ["TMDA_VLOOKUP"],
"Recompile CGI.")
Params = Sandbox["getuserparams"](List)
self.Vars["HOME"], self.Vars["UID"], self.Vars["GID"] = Params[
0:3]
if len(Params) > 3:
self.Vars["NAME"] = Params[3]
else:
self.Vars["NAME"] = None
else:
self.Vars["HOME"], self.Vars["UID"], self.Vars["GID"] = \
Util.getuserparams(self.Vars["User"])
self.Vars["NAME"] = pwd.getpwuid(self.Vars["UID"])[4]
except KeyError, str:
Template.Template.Dict["ErrMsg"] = \
"Username %s not found in system.\nstr=%s" % (self.Vars["User"], str)
return
