Bitmessage/PyBitmessage-2024-12-03
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make runnable with OpenSSL 3 in addition to other versions

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Kashiko Koibumi 2024-05-20 15:42:04 +09:00
parent 41fd17b637
commit 72ba0b6bc1
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GPG Key ID: 8F06E069E37C40C4
1 changed files with 40 additions and 8 deletions
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32
src/network/tls.py
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@ -58,14 +58,28 @@ class TLSDispatcher(AdvancedDispatcher):
self.tlsDone = False
self.tlsVersion = "N/A"
self.isSSL = False
if ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
self.tlsPrepared = False
def state_tls_init(self):
"""Prepare sockets for TLS handshake"""
self.isSSL = True
self.tlsStarted = True
if ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
self.want_read = self.want_write = True
self.set_state("tls_handshake")
return False
do_tls_init(self)
def do_tls_init(self):
# Once the connection has been established,
# it's safe to wrap the socket.
if sys.version_info >= (2, 7, 9):
if ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
context = ssl.SSLContext(ssl.PROTOCOL_TLS_CLIENT)
else:
context = ssl.create_default_context(
purpose=ssl.Purpose.SERVER_AUTH
if self.server_side else ssl.Purpose.CLIENT_AUTH)
@ -74,6 +88,11 @@ class TLSDispatcher(AdvancedDispatcher):
context.check_hostname = False
context.verify_mode = ssl.CERT_NONE
# also exclude TLSv1 and TLSv1.1 in the future
if ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
context.options = ssl.OP_ALL | ssl.OP_NO_SSLv2 |\
ssl.OP_NO_SSLv3 | ssl.OP_SINGLE_ECDH_USE |\
ssl.OP_CIPHER_SERVER_PREFERENCE | ssl.OP_NO_TLS1_3
else:
context.options = ssl.OP_ALL | ssl.OP_NO_SSLv2 |\
ssl.OP_NO_SSLv3 | ssl.OP_SINGLE_ECDH_USE |\
ssl.OP_CIPHER_SERVER_PREFERENCE
@ -88,6 +107,9 @@ class TLSDispatcher(AdvancedDispatcher):
ciphers=self.ciphers, do_handshake_on_connect=False)
self.sslSocket.setblocking(0)
self.want_read = self.want_write = True
if ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
self.tlsPrepared = True
else:
self.set_state("tls_handshake")
return False
@ -114,6 +136,8 @@ class TLSDispatcher(AdvancedDispatcher):
# during TLS handshake, and after flushing write buffer,
# return status of last handshake attempt
if self.tlsStarted and not self.tlsDone and not self.write_buf:
# with OpenSSL 3, excessive logs are spitted
if ssl.OPENSSL_VERSION_NUMBER < 0x30000000:
logger.debug('tls readable, %r', self.want_read)
return self.want_read
# prior to TLS handshake,
@ -134,6 +158,10 @@ class TLSDispatcher(AdvancedDispatcher):
try:
# wait for write buffer flush
if self.tlsStarted and not self.tlsDone and not self.write_buf:
if ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
if not self.tlsPrepared:
self.do_tls_init()
return
self.tls_handshake()
else:
AdvancedDispatcher.handle_read(self)
@ -156,6 +184,10 @@ class TLSDispatcher(AdvancedDispatcher):
try:
# wait for write buffer flush
if self.tlsStarted and not self.tlsDone and not self.write_buf:
if ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
if not self.tlsPrepared:
self.do_tls_init()
return
self.tls_handshake()
else:
AdvancedDispatcher.handle_write(self)