def _prepare_index(self):
# Add space for file size
self.index_offset += 8
# Space for num_signatures & num_additional_sections
self.index_offset += 4 + 4
# Write the magic and placeholder for the index
self.fileobj.write(b"MAR1" + packint(self.index_offset))
# Write placeholder for file size
self.fileobj.write(struct.pack(">Q", 0))
# Write num_signatures
self.fileobj.write(packint(len(self.signature_versions)))
# Write placeholder signatures
for algo_id, keyfile in self.signature_versions:
sig = MarSignature(algo_id, keyfile)
sig._offset = self.index_offset
self.index_offset += sig.size
self.signatures.append(sig)
# algoid
self.fileobj.write(packint(algo_id))
# numbytes
self.fileobj.write(packint(sig.sigsize))
# space for signature
self.fileobj.write("\0" * sig.sigsize)
# Write placeholder for number of additional sections
self.fileobj.write(packint(0))
def _prepare_index(self):
# Add space for file size
self.index_offset += 8
# Space for num_signatures & num_additional_sections
self.index_offset += 4 + 4
# Write the magic and placeholder for the index
self.fileobj.write(b"MAR1" + packint(self.index_offset))
# Write placeholder for file size
self.fileobj.write(struct.pack(">Q", 0))
# Write num_signatures
self.fileobj.write(packint(len(self.signature_versions)))
# Write placeholder signatures
for algo_id, keyfile in self.signature_versions:
sig = MarSignature(algo_id, keyfile)
sig._offset = self.index_offset
self.index_offset += sig.size
self.signatures.append(sig)
# algoid
self.fileobj.write(packint(algo_id))
# numbytes
self.fileobj.write(packint(sig.sigsize))
# space for signature
self.fileobj.write("\0" * sig.sigsize)
# Write placeholder for number of additional sections
self.fileobj.write(packint(0))
def write(self, fp):
if self.block_id == 1:
mar_channel = self.info['MARChannelName'].encode('ascii')
product_version = self.info['ProductVersion'].encode('ascii')
data = mar_channel + b"\x00" + product_version + b"\x00"
self.size = len(data) + 8
fp.write(packint(self.size))
fp.write(packint(self.block_id))
fp.write(data)
else:
raise ValueError("Unsupported additional info section: %s" %
self.block_id)
def write(self, fp):
if self.block_id == 1:
mar_channel = self.info['MARChannelName'].encode('ascii')
product_version = self.info['ProductVersion'].encode('ascii')
data = mar_channel + b"\x00" + product_version + b"\x00"
self.size = len(data) + 8
fp.write(packint(self.size))
fp.write(packint(self.block_id))
fp.write(data)
else:
raise ValueError("Unsupported additional info section: %s" %
self.block_id)
def _write_index(self):
"""Writes the index of all members at the end of the file"""
log.debug("rewriting index at %i", self.index_offset + 4)
self.fileobj.seek(self.index_offset + 4)
index_size = 0
for m in self.members:
member_bytes = m.to_bytes()
index_size += len(member_bytes)
for m in self.members:
member_bytes = m.to_bytes()
self.fileobj.write(member_bytes)
self.fileobj.seek(self.index_offset)
self.fileobj.write(packint(index_size))
# Update the offset to the index
self.fileobj.seek(4)
self.fileobj.write(packint(self.index_offset))
def _write_index(self):
"""Writes the index of all members at the end of the file"""
log.debug("rewriting index at %i", self.index_offset + 4)
self.fileobj.seek(self.index_offset + 4)
index_size = 0
for m in self.members:
member_bytes = m.to_bytes()
index_size += len(member_bytes)
for m in self.members:
member_bytes = m.to_bytes()
self.fileobj.write(member_bytes)
self.fileobj.seek(self.index_offset)
self.fileobj.write(packint(index_size))
# Update the offset to the index
self.fileobj.seek(4)
self.fileobj.write(packint(self.index_offset))
