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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_', 'crypto/pem/pem.h'),

'SSL': ('ERR_LIB_SSL', 'SSL_R_', 'ssl/ssl.h'),

'X509': ('ERR_LIB_X509', 'X509_R_', 'crypto/x509/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/ssl/make_ssl_data.py */")

w("/* Generated on %s */" % datetime.datetime.now().isoformat())

w("")

w("static struct py_ssl_library_code library_codes[] = {")

for mnemo, (libcode, _, _) in sorted(error_libraries.items()):

w(' {"%s", %s},' % (mnemo, libcode))

w(' { NULL }')

w('};')

w("")

w("static struct py_ssl_error_code error_codes[] = {")

for errcode, (libcode, name, num) in sorted(codes.items()):

w(' #ifdef %s' % (errcode))

w(' {"%s", %s, %s},' % (name, libcode, errcode))

w(' #else')

w(' {"%s", %s, %d},' % (name, libcode, num))

w(' #endif')

w(' { NULL }')

w('};')

if not use_stdout:

f.close()

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