def validChannelCastMsg(channelcast_data):
""" Returns true if ChannelCastMsg is valid,
format: {'signature':{'publisher_id':, 'publisher_name':, 'infohash':, 'torrenthash':, 'torrent_name':, 'timestamp':, 'signature':}}
"""
if not isinstance(channelcast_data,dict):
return False
for signature, ch in channelcast_data.items():
if not isinstance(ch,dict):
if DEBUG:
print >>sys.stderr,time.asctime(),'-', "rvalidChannelCastMsg: a: value not dict"
return False
if len(ch) !=6:
if DEBUG:
print >>sys.stderr,time.asctime(),'-', "rvalidChannelCastMsg: a: #keys!=6"
return False
if not ('publisher_id' in ch and 'publisher_name' in ch and 'infohash' in ch and 'torrenthash' in ch and 'torrentname' in ch and 'time_stamp' in ch):
if DEBUG:
print >>sys.stderr,time.asctime(),'-', "validChannelCastMsg: a: key missing, got",d.keys()
return False
if not (validPermid(ch['publisher_id']) and (isinstance(ch['publisher_name'],str) or isinstance(ch['publisher_name'], unicode)) and validInfohash(ch['infohash']) and validInfohash(ch['torrenthash'])
and (isinstance(ch['torrentname'],str) or isinstance(ch['torrentname'],unicode)) and validTimestamp(ch['time_stamp'])):
if DEBUG:
print >>sys.stderr,time.asctime(),'-', "validChannelCastMsg: something not valid"
return False
# now, verify signature
l = (ch['publisher_id'],ch['infohash'], ch['torrenthash'], ch['time_stamp'])
if not verify_data(bencode(l),str2bin(ch['publisher_id']),str2bin(signature)):
if DEBUG:
print >>sys.stderr, time.asctime(),'-', "validChannelCastMsg: verification failed!"
return False
return True
def validChannelCastMsg(channelcast_data):
""" Returns true if ChannelCastMsg is valid,
format: {'signature':{'publisher_id':, 'publisher_name':, 'infohash':, 'torrenthash':, 'torrent_name':, 'timestamp':, 'signature':}}
"""
if not isinstance(channelcast_data,dict):
return False
for signature, ch in channelcast_data.items():
if not isinstance(ch,dict):
if DEBUG:
print >>sys.stderr,"validChannelCastMsg: value not dict"
return False
# 08-04-2010 We accept both 6 and 7 fields to allow
# compatibility with messages from older versions
# the rich metadata field
length = len(ch)
if not 6 <= length <= 7:
if DEBUG:
print >>sys.stderr,"validChannelCastMsg: #keys!=7"
return False
if not ('publisher_id' in ch and 'publisher_name' in ch and 'infohash' in ch and 'torrenthash' in ch \
and 'torrentname' in ch and 'time_stamp' in ch):
if DEBUG:
print >>sys.stderr,"validChannelCastMsg: key missing"
return False
if length == 7:
if 'rich_metadata' not in ch: #enriched Channelcast
if DEBUG:
print >>sys.stderr,"validChannelCastMsg: key missing"
return False
else:
if not validMetadataEntry(ch['rich_metadata']):
print >> sys.stderr, "validChannelCastMsg: invalid rich metadata"
return False
if not (validPermid(ch['publisher_id']) and isinstance(ch['publisher_name'],str) \
and validInfohash(ch['infohash']) and validInfohash(ch['torrenthash'])
and isinstance(ch['torrentname'],str) and validTimestamp(ch['time_stamp'])):
if DEBUG:
print >>sys.stderr,"validChannelCastMsg: something not valid"
return False
# now, verify signature
# Nitin on Feb 5, 2010: Signature is validated using binary forms of permid, infohash, torrenthash fields
l = (ch['publisher_id'],ch['infohash'], ch['torrenthash'], ch['time_stamp'])
if not verify_data(bencode(l),ch['publisher_id'],signature):
if DEBUG:
print >>sys.stderr, "validChannelCastMsg: verification failed!"
return False
return True
def validChannelCastMsg(channelcast_data):
""" Returns true if ChannelCastMsg is valid,
format: {'signature':{'publisher_id':, 'publisher_name':, 'infohash':, 'torrenthash':, 'torrent_name':, 'timestamp':, 'signature':}}
"""
if not isinstance(channelcast_data, dict):
return False
for signature, ch in channelcast_data.items():
if not isinstance(ch, dict):
if DEBUG:
print >> sys.stderr, "validChannelCastMsg: value not dict"
return False
# 08-04-2010 We accept both 6 and 7 fields to allow
# compatibility with messages from older versions
# the rich metadata field
length = len(ch)
if not 6 <= length <= 7:
if DEBUG:
print >> sys.stderr, "validChannelCastMsg: #keys!=7"
return False
if not ('publisher_id' in ch and 'publisher_name' in ch and 'infohash' in ch and 'torrenthash' in ch \
and 'torrentname' in ch and 'time_stamp' in ch):
if DEBUG:
print >> sys.stderr, "validChannelCastMsg: key missing"
return False
if length == 7:
if 'rich_metadata' not in ch: #enriched Channelcast
if DEBUG:
print >> sys.stderr, "validChannelCastMsg: key missing"
return False
else:
if not validMetadataEntry(ch['rich_metadata']):
print >> sys.stderr, "validChannelCastMsg: invalid rich metadata"
return False
if not (validPermid(ch['publisher_id']) and isinstance(ch['publisher_name'],str) \
and validInfohash(ch['infohash']) and validInfohash(ch['torrenthash'])
and isinstance(ch['torrentname'],str) and validTimestamp(ch['time_stamp'])):
if DEBUG:
print >> sys.stderr, "validChannelCastMsg: something not valid"
return False
# now, verify signature
# Nitin on Feb 5, 2010: Signature is validated using binary forms of permid, infohash, torrenthash fields
l = (ch['publisher_id'], ch['infohash'], ch['torrenthash'],
ch['time_stamp'])
if not verify_data(bencode(l), ch['publisher_id'], signature):
if DEBUG:
print >> sys.stderr, "validChannelCastMsg: verification failed!"
return False
return True
def verifySignature(self):
"""
Verifies the signature field of this instance.
The signature is verified agains the packed version of this
instance. See _packData
"""
assert self.signature is not None
toVerify = self._packData()
binaryPermId = self.channel
return verify_data(toVerify, binaryPermId, self.signature)
def verifySignature(self):
"""
Verifies the signature field of this instance.
The signature is verified agains the packed version of this
instance. See _packData
"""
assert self.signature is not None
toVerify = self._packData()
binaryPermId = self.channel
return verify_data(toVerify, binaryPermId, self.signature)
