def get_size(self, d):
"""Get total octet count of a body specified by new length header octs.
:Parameters:
- `d`: string of "new" length octets, note that this string
cannot be made up of arbitrary bytes, and must conform
to the rules of new length values (rfc2440 4.2.2)
:Returns: XXXXXXX TODO
Example:
>>> newlength_octets = [0xff, 0x92, 0xdf, 0x7c, 0xbb]
>>> newlength_data_string = ''.join(map(chr, length_octet_list))
>>> newlength = NewLength()
>>> newlength.get_size(newlength_data_string)
2464119995
"""
idx = size = 0
# the length_list is to keep track of data (d) actually used -
# it's possible that a string of partials could terminate with
# leftover octets
length_list = []
if 0 < len(d):
for L in [(x, ord(x)) for x in d]:
if L[1] < 192:
size = size + L[1]
length_list.append(L[0])
break
elif 192 <= L[1] <= 223:
slice = d[idx:idx + 2]
s = STN.doubleoct2int(slice)
if 192 <= s <= 8383: # ?? dunno about this restriction
size = size + s
length_list.append(slice)
else:
raise PGPFormatError(
"New double octet lengths are confined to the range 192 <= x <= 8383. Received: data->(%s) length->(%s)"
% (d, size))
break
elif 255 == L[1]:
slice = d[idx:idx + 5]
size = size + STN.pentoct2int(slice)
length_list.append(slice)
break
elif 224 <= L[1] <= 254: # partials
slice = d[idx:idx + 1]
size = size + STN.partial2int(slice)
length_list.append(slice)
idx = idx + 1
else:
raise PGPFormatError(
"Length must have at least one octet. Received len(d) == 0.")
return size, length_list
def get_size(self, d):
"""Get total octet count of a body specified by new length header octs.
:Parameters:
- `d`: string of "new" length octets, note that this string
cannot be made up of arbitrary bytes, and must conform
to the rules of new length values (rfc2440 4.2.2)
:Returns: XXXXXXX TODO
Example:
>>> newlength_octets = [0xff, 0x92, 0xdf, 0x7c, 0xbb]
>>> newlength_data_string = ''.join(map(chr, length_octet_list))
>>> newlength = NewLength()
>>> newlength.get_size(newlength_data_string)
2464119995
"""
idx = size = 0
# the length_list is to keep track of data (d) actually used -
# it's possible that a string of partials could terminate with
# leftover octets
length_list = []
if 0 < len(d):
for L in [(x, ord(x)) for x in d]:
if L[1] < 192:
size = size + L[1]
length_list.append(L[0])
break
elif 192 <= L[1] <= 223:
slice = d[idx:idx+2]
s = STN.doubleoct2int(slice)
if 192 <= s <= 8383: # ?? dunno about this restriction
size = size + s
length_list.append(slice)
else:
raise PGPFormatError("New double octet lengths are confined to the range 192 <= x <= 8383. Received: data->(%s) length->(%s)" % (d, size))
break
elif 255 == L[1]:
slice = d[idx:idx+5]
size = size + STN.pentoct2int(slice)
length_list.append(slice)
break
elif 224 <= L[1] <= 254: # partials
slice = d[idx:idx+1]
size = size + STN.partial2int(slice)
length_list.append(slice)
idx = idx + 1
else:
raise PGPFormatError("Length must have at least one octet. Received len(d) == 0.")
return size, length_list
def fill(self, d):
ord_d = ord(d[0])
if ord_d < 192:
slice = d[0]
size = ord_d
elif 192 <= ord_d < 255:
slice = d[:2]
#size = size + STN.doubleoct2int(slice)
size = STN.doubleoct2int(slice)
elif 255 == ord_d:
slice = d[:5]
#size = size + STN.pentoct2int(slice)
size = STN.pentoct2int(slice)
len_slice = len(slice)
self._d = d[:len_slice + size]
type_d = d[len_slice:len_slice + 1]
self.type = 127 & ord(type_d)
self.critical = 128 & ord(type_d)
value_d = d[len_slice + 1:len_slice + size]
if SIGSUB_SIGNERID == self.type:
self.value = STN.str2hex(value_d[:8])
elif self.type in [SIGSUB_CREATED, SIGSUB_EXPIRES, SIGSUB_KEYEXPIRES]:
self.value = STN.str2int(value_d[:4])
self.value = STN.str2int(value_d)
elif self.type in [
SIGSUB_EXPORTABLE, SIGSUB_REVOCABLE, SIGSUB_PRIMARYUID
]:
self.value = STN.str2int(value_d[:1])
if self.value not in [0, 1]:
raise SignatureSubpacketValueError, "Subpacket (# %s) value must be 0 or 1." % (
str(subtype))
elif SIGSUB_TRUST == self.type: # level, amount
self.value = (STN.str2int(value_d[0]), STN.str2int(value_d[1]))
elif self.type in [
SIGSUB_SYMCODE, SIGSUB_HASHCODE, SIGSUB_COMPCODE,
SIGSUB_KEYSERVPREFS, SIGSUB_KEYFLAGS, SIGSUB_FEATURES
]:
self.value = [ord(x) for x in value_d]
elif SIGSUB_REVOKER == self.type:
cls = STN.str2int(value_d[0])
alg = STN.str2int(value_d[1])
fprint = STN.str2hex(value_d[2:22])
self.value = (cls, alg, fprint)
elif SIGSUB_NOTE == self.type:
flags = [STN.str2int(x)
for x in value_d[:4]] # first four flag octs
name_len = STN.str2int(value_d[4:6])
val_len = STN.str2int(value_d[6:8])
nam = value_d[8:8 + name_len]
val = value_d[8 + name_len:8 + name_len + val_len]
self.value = (flags, nam, val)
elif self.type in [
SIGSUB_KEYSERV, SIGSUB_POLICYURL, SIGSUB_SIGNERUID,
SIGSUB_REGEX
]:
self.value = value_d
elif SIGSUB_REVOCREASON == self.type: # code, reason
self.value = (STN.str2int(value_d[0]), value_d[1:])
elif SIGSUB_SIGTARGET == self.type:
raise NotImplementedError, "SIGTARGET not supported"
else: # the subpacket has an unknown type, so just pack the data in
self.value = value_d
def fill(self, d):
ord_d = ord(d[0])
if ord_d < 192:
slice = d[0]
size = ord_d
elif 192 <= ord_d < 255:
slice = d[:2]
#size = size + STN.doubleoct2int(slice)
size = STN.doubleoct2int(slice)
elif 255 == ord_d:
slice = d[:5]
#size = size + STN.pentoct2int(slice)
size = STN.pentoct2int(slice)
len_slice = len(slice)
self._d = d[:len_slice+size]
type_d = d[len_slice:len_slice+1]
self.type = 127 & ord(type_d)
self.critical = 128 & ord(type_d)
value_d = d[len_slice+1:len_slice+size]
if SIGSUB_SIGNERID == self.type:
self.value = STN.str2hex(value_d[:8])
elif self.type in [SIGSUB_CREATED, SIGSUB_EXPIRES, SIGSUB_KEYEXPIRES]:
self.value = STN.str2int(value_d[:4])
self.value = STN.str2int(value_d)
elif self.type in [SIGSUB_EXPORTABLE, SIGSUB_REVOCABLE, SIGSUB_PRIMARYUID]:
self.value = STN.str2int(value_d[:1])
if self.value not in [0, 1]:
raise SignatureSubpacketValueError, "Subpacket (# %s) value must be 0 or 1." % (str(subtype))
elif SIGSUB_TRUST == self.type: # level, amount
self.value = (STN.str2int(value_d[0]), STN.str2int(value_d[1]))
elif self.type in [SIGSUB_SYMCODE, SIGSUB_HASHCODE, SIGSUB_COMPCODE, SIGSUB_KEYSERVPREFS, SIGSUB_KEYFLAGS, SIGSUB_FEATURES]:
self.value = [ord(x) for x in value_d]
elif SIGSUB_REVOKER == self.type:
cls = STN.str2int(value_d[0])
alg = STN.str2int(value_d[1])
fprint = STN.str2hex(value_d[2:22])
self.value = (cls, alg, fprint)
elif SIGSUB_NOTE == self.type:
flags = [STN.str2int(x) for x in value_d[:4]] # first four flag octs
name_len = STN.str2int(value_d[4:6])
val_len = STN.str2int(value_d[6:8])
nam = value_d[8:8+name_len]
val = value_d[8+name_len:8+name_len+val_len]
self.value = (flags, nam, val)
elif self.type in [SIGSUB_KEYSERV, SIGSUB_POLICYURL, SIGSUB_SIGNERUID, SIGSUB_REGEX]:
self.value = value_d
elif SIGSUB_REVOCREASON == self.type: # code, reason
self.value = (STN.str2int(value_d[0]), value_d[1:])
elif SIGSUB_SIGTARGET == self.type:
raise NotImplementedError, "SIGTARGET not supported"
else: # the subpacket has an unknown type, so just pack the data in
self.value = value_d
