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bahamut: pre-initialize entropy to avoid freezing on GH Actions

This commit is contained in:
Valentin Lorentz 2022-06-19 11:59:03 +02:00
parent 8a4f254a21
commit e205cc1531
1 changed files with 18 additions and 0 deletions
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18
irctest/controllers/bahamut.py
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@ -80,6 +80,19 @@ oper {{
"""
def initialize_entropy(directory: str) -> None:
# https://github.com/DALnet/bahamut/blob/7fc039d403f66a954225c5dc4ad1fe683aedd794/include/dh.h#L35-L38
nb_rand_bytes = 512 // 8
# https://github.com/DALnet/bahamut/blob/7fc039d403f66a954225c5dc4ad1fe683aedd794/src/dh.c#L186
entropy_file_size = nb_rand_bytes * 4
# Not actually random; but we don't care.
entropy = b"\x00" * entropy_file_size
with open(os.path.join(directory, ".ircd.entropy"), "wb") as fd:
fd.write(entropy)
class BahamutController(BaseServerController, DirectoryBasedController):
software_name = "Bahamut"
supported_sasl_mechanisms: Set[str] = set()
@ -121,6 +134,11 @@ class BahamutController(BaseServerController, DirectoryBasedController):
assert self.directory
# Bahamut reads some bytes from /dev/urandom on startup, which causes
# GitHub Actions to sometimes freeze and timeout.
# This initializes the entropy file so Bahamut does not need to do it itself.
initialize_entropy(self.directory)
# they are hardcoded... thankfully Bahamut reads them from the CWD.
shutil.copy(self.pem_path, os.path.join(self.directory, "ircd.crt"))
shutil.copy(self.key_path, os.path.join(self.directory, "ircd.key"))