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#! /usr/bin/env python3
"""
This script should be called *manually* when we want to upgrade SSLError
`library` and `reason` mnemnonics to a more recent OpenSSL version.
It takes two arguments:
- the path to the OpenSSL source tree (e.g. git checkout)
- the path to the C file to be generated
(probably Modules/_ssl_data.h)
"""
import datetime
import os
import re
import sys
import _ssl
def parse_error_codes(h_file, prefix, libcode):
pat = re.compile(r"#define\W+(%s([\w]+))\W+(\d+)\b" % re.escape(prefix))
codes = []
with open(h_file, "r", encoding="latin1") as f:
for line in f:
match = pat.search(line)
if match:
code, name, num = match.groups()
num = int(num)
# e.g. ("SSL_R_BAD_DATA", ("ERR_LIB_SSL", "BAD_DATA", 390))
codes.append((code, (libcode, name, num)))
return codes
if __name__ == "__main__":
openssl_inc = sys.argv[1]
outfile = sys.argv[2]
use_stdout = outfile == '-'
f = sys.stdout if use_stdout else open(outfile, "w")
error_libraries = {
# mnemonic -> (library code, error prefix, header file)
'PEM': ('ERR_LIB_PEM', 'PEM_R_', 'include/openssl/pem.h'),
'SSL': ('ERR_LIB_SSL', 'SSL_R_', 'include/openssl/ssl.h'),
'X509': ('ERR_LIB_X509', 'X509_R_', 'include/openssl/x509.h'),
}
# Read codes from libraries
new_codes = []
for libcode, prefix, h_file in sorted(error_libraries.values()):
new_codes += parse_error_codes(os.path.join(openssl_inc, h_file),
prefix, libcode)
new_code_nums = set((libcode, num)
for (code, (libcode, name, num)) in new_codes)
# Merge with existing codes (in case some old codes disappeared).
codes = {}
for errname, (libnum, errnum) in _ssl.err_names_to_codes.items():
lib = error_libraries[_ssl.lib_codes_to_names[libnum]]
libcode = lib[0] # e.g. ERR_LIB_PEM
errcode = lib[1] + errname # e.g. SSL_R_BAD_SSL_SESSION_ID_LENGTH
# Only keep it if the numeric codes weren't reused
if (libcode, errnum) not in new_code_nums:
codes[errcode] = libcode, errname, errnum
codes.update(dict(new_codes))
def w(l):
f.write(l + "\n")
w("# File generated by tools/make_ssl_data.py")
w("# Generated on %s" % datetime.datetime.now().isoformat())
w("")
w("from _openssl import ffi, lib ")
w("_lib_codes = []")
for mnemo, (libcode, _, _) in sorted(error_libraries.items()):
w('_lib_codes.append(("%s", lib.%s))' % (mnemo, libcode))
w("_error_codes = []")
for errcode, (libcode, name, num) in sorted(codes.items()):
#w('if lib.%s:' % (errcode))
#w(' _error_codes.append(("%s", lib.%s, lib.%s))' % (name, libcode, errcode))
#w('else:')
w('_error_codes.append(("%s", lib.%s, %d))' % (name, libcode, num))
if not use_stdout:
f.close()
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