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1 | # sslutil.py - SSL handling for mercurial |
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1 | # sslutil.py - SSL handling for mercurial | |
2 | # |
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2 | # | |
3 | # Copyright 2005, 2006, 2007, 2008 Matt Mackall <mpm@selenic.com> |
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3 | # Copyright 2005, 2006, 2007, 2008 Matt Mackall <mpm@selenic.com> | |
4 | # Copyright 2006, 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br> |
|
4 | # Copyright 2006, 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br> | |
5 | # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com> |
|
5 | # Copyright 2006 Vadim Gelfer <vadim.gelfer@gmail.com> | |
6 | # |
|
6 | # | |
7 | # This software may be used and distributed according to the terms of the |
|
7 | # This software may be used and distributed according to the terms of the | |
8 | # GNU General Public License version 2 or any later version. |
|
8 | # GNU General Public License version 2 or any later version. | |
9 | import os |
|
9 | import os | |
10 |
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10 | |||
11 | from mercurial import util |
|
11 | from mercurial import util | |
12 | from mercurial.i18n import _ |
|
12 | from mercurial.i18n import _ | |
13 | try: |
|
13 | try: | |
14 | # avoid using deprecated/broken FakeSocket in python 2.6 |
|
14 | # avoid using deprecated/broken FakeSocket in python 2.6 | |
15 | import ssl |
|
15 | import ssl | |
16 | CERT_REQUIRED = ssl.CERT_REQUIRED |
|
16 | CERT_REQUIRED = ssl.CERT_REQUIRED | |
17 | def ssl_wrap_socket(sock, keyfile, certfile, |
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17 | def ssl_wrap_socket(sock, keyfile, certfile, | |
18 | cert_reqs=ssl.CERT_NONE, ca_certs=None): |
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18 | cert_reqs=ssl.CERT_NONE, ca_certs=None): | |
19 | sslsocket = ssl.wrap_socket(sock, keyfile, certfile, |
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19 | sslsocket = ssl.wrap_socket(sock, keyfile, certfile, | |
20 | cert_reqs=cert_reqs, ca_certs=ca_certs) |
|
20 | cert_reqs=cert_reqs, ca_certs=ca_certs) | |
21 | # check if wrap_socket failed silently because socket had been closed |
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21 | # check if wrap_socket failed silently because socket had been closed | |
22 | # - see http://bugs.python.org/issue13721 |
|
22 | # - see http://bugs.python.org/issue13721 | |
23 | if not sslsocket.cipher(): |
|
23 | if not sslsocket.cipher(): | |
24 | raise util.Abort(_('ssl connection failed')) |
|
24 | raise util.Abort(_('ssl connection failed')) | |
25 | return sslsocket |
|
25 | return sslsocket | |
26 | except ImportError: |
|
26 | except ImportError: | |
27 | CERT_REQUIRED = 2 |
|
27 | CERT_REQUIRED = 2 | |
28 |
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28 | |||
29 | import socket, httplib |
|
29 | import socket, httplib | |
30 |
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30 | |||
31 | def ssl_wrap_socket(sock, key_file, cert_file, |
|
31 | def ssl_wrap_socket(sock, key_file, cert_file, | |
32 | cert_reqs=CERT_REQUIRED, ca_certs=None): |
|
32 | cert_reqs=CERT_REQUIRED, ca_certs=None): | |
33 | if not util.safehasattr(socket, 'ssl'): |
|
33 | if not util.safehasattr(socket, 'ssl'): | |
34 | raise util.Abort(_('Python SSL support not found')) |
|
34 | raise util.Abort(_('Python SSL support not found')) | |
35 | if ca_certs: |
|
35 | if ca_certs: | |
36 | raise util.Abort(_( |
|
36 | raise util.Abort(_( | |
37 | 'certificate checking requires Python 2.6')) |
|
37 | 'certificate checking requires Python 2.6')) | |
38 |
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38 | |||
39 | ssl = socket.ssl(sock, key_file, cert_file) |
|
39 | ssl = socket.ssl(sock, key_file, cert_file) | |
40 | return httplib.FakeSocket(sock, ssl) |
|
40 | return httplib.FakeSocket(sock, ssl) | |
41 |
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41 | |||
42 | def _verifycert(cert, hostname): |
|
42 | def _verifycert(cert, hostname): | |
43 | '''Verify that cert (in socket.getpeercert() format) matches hostname. |
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43 | '''Verify that cert (in socket.getpeercert() format) matches hostname. | |
44 | CRLs is not handled. |
|
44 | CRLs is not handled. | |
45 |
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45 | |||
46 | Returns error message if any problems are found and None on success. |
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46 | Returns error message if any problems are found and None on success. | |
47 | ''' |
|
47 | ''' | |
48 | if not cert: |
|
48 | if not cert: | |
49 | return _('no certificate received') |
|
49 | return _('no certificate received') | |
50 | dnsname = hostname.lower() |
|
50 | dnsname = hostname.lower() | |
51 | def matchdnsname(certname): |
|
51 | def matchdnsname(certname): | |
52 | return (certname == dnsname or |
|
52 | return (certname == dnsname or | |
53 | '.' in dnsname and certname == '*.' + dnsname.split('.', 1)[1]) |
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53 | '.' in dnsname and certname == '*.' + dnsname.split('.', 1)[1]) | |
54 |
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54 | |||
55 | san = cert.get('subjectAltName', []) |
|
55 | san = cert.get('subjectAltName', []) | |
56 | if san: |
|
56 | if san: | |
57 | certnames = [value.lower() for key, value in san if key == 'DNS'] |
|
57 | certnames = [value.lower() for key, value in san if key == 'DNS'] | |
58 | for name in certnames: |
|
58 | for name in certnames: | |
59 | if matchdnsname(name): |
|
59 | if matchdnsname(name): | |
60 | return None |
|
60 | return None | |
61 | if certnames: |
|
61 | if certnames: | |
62 | return _('certificate is for %s') % ', '.join(certnames) |
|
62 | return _('certificate is for %s') % ', '.join(certnames) | |
63 |
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63 | |||
64 | # subject is only checked when subjectAltName is empty |
|
64 | # subject is only checked when subjectAltName is empty | |
65 | for s in cert.get('subject', []): |
|
65 | for s in cert.get('subject', []): | |
66 | key, value = s[0] |
|
66 | key, value = s[0] | |
67 | if key == 'commonName': |
|
67 | if key == 'commonName': | |
68 | try: |
|
68 | try: | |
69 | # 'subject' entries are unicode |
|
69 | # 'subject' entries are unicode | |
70 | certname = value.lower().encode('ascii') |
|
70 | certname = value.lower().encode('ascii') | |
71 | except UnicodeEncodeError: |
|
71 | except UnicodeEncodeError: | |
72 | return _('IDN in certificate not supported') |
|
72 | return _('IDN in certificate not supported') | |
73 | if matchdnsname(certname): |
|
73 | if matchdnsname(certname): | |
74 | return None |
|
74 | return None | |
75 | return _('certificate is for %s') % certname |
|
75 | return _('certificate is for %s') % certname | |
76 | return _('no commonName or subjectAltName found in certificate') |
|
76 | return _('no commonName or subjectAltName found in certificate') | |
77 |
|
77 | |||
78 |
|
78 | |||
79 | # CERT_REQUIRED means fetch the cert from the server all the time AND |
|
79 | # CERT_REQUIRED means fetch the cert from the server all the time AND | |
80 | # validate it against the CA store provided in web.cacerts. |
|
80 | # validate it against the CA store provided in web.cacerts. | |
81 | # |
|
81 | # | |
82 | # We COMPLETELY ignore CERT_REQUIRED on Python <= 2.5, as it's totally |
|
82 | # We COMPLETELY ignore CERT_REQUIRED on Python <= 2.5, as it's totally | |
83 | # busted on those versions. |
|
83 | # busted on those versions. | |
84 |
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84 | |||
85 | def sslkwargs(ui, host): |
|
85 | def sslkwargs(ui, host): | |
86 | cacerts = ui.config('web', 'cacerts') |
|
86 | cacerts = ui.config('web', 'cacerts') | |
87 | hostfingerprint = ui.config('hostfingerprints', host) |
|
87 | hostfingerprint = ui.config('hostfingerprints', host) | |
88 | if cacerts and not hostfingerprint: |
|
88 | if cacerts and not hostfingerprint: | |
89 | cacerts = util.expandpath(cacerts) |
|
89 | cacerts = util.expandpath(cacerts) | |
90 | if not os.path.exists(cacerts): |
|
90 | if not os.path.exists(cacerts): | |
91 | raise util.Abort(_('could not find web.cacerts: %s') % cacerts) |
|
91 | raise util.Abort(_('could not find web.cacerts: %s') % cacerts) | |
92 | return {'ca_certs': cacerts, |
|
92 | return {'ca_certs': cacerts, | |
93 | 'cert_reqs': CERT_REQUIRED, |
|
93 | 'cert_reqs': CERT_REQUIRED, | |
94 | } |
|
94 | } | |
95 | return {} |
|
95 | return {} | |
96 |
|
96 | |||
97 | class validator(object): |
|
97 | class validator(object): | |
98 | def __init__(self, ui, host): |
|
98 | def __init__(self, ui, host): | |
99 | self.ui = ui |
|
99 | self.ui = ui | |
100 | self.host = host |
|
100 | self.host = host | |
101 |
|
101 | |||
102 | def __call__(self, sock): |
|
102 | def __call__(self, sock): | |
103 | host = self.host |
|
103 | host = self.host | |
104 | cacerts = self.ui.config('web', 'cacerts') |
|
104 | cacerts = self.ui.config('web', 'cacerts') | |
105 | hostfingerprint = self.ui.config('hostfingerprints', host) |
|
105 | hostfingerprint = self.ui.config('hostfingerprints', host) | |
|
106 | if not getattr(sock, 'getpeercert', False): # python 2.5 ? | |||
|
107 | if hostfingerprint: | |||
|
108 | raise util.Abort(_("host fingerprint for %s can't be " | |||
|
109 | "verified (Python too old)") % host) | |||
|
110 | self.ui.warn(_("warning: certificate for %s can't be verified " | |||
|
111 | "(Python too old)\n") % host) | |||
|
112 | return | |||
106 | if cacerts and not hostfingerprint: |
|
113 | if cacerts and not hostfingerprint: | |
107 | msg = _verifycert(sock.getpeercert(), host) |
|
114 | msg = _verifycert(sock.getpeercert(), host) | |
108 | if msg: |
|
115 | if msg: | |
109 | raise util.Abort(_('%s certificate error: %s ' |
|
116 | raise util.Abort(_('%s certificate error: %s ' | |
110 | '(use --insecure to connect ' |
|
117 | '(use --insecure to connect ' | |
111 | 'insecurely)') % (host, msg)) |
|
118 | 'insecurely)') % (host, msg)) | |
112 | self.ui.debug('%s certificate successfully verified\n' % host) |
|
119 | self.ui.debug('%s certificate successfully verified\n' % host) | |
113 | else: |
|
120 | else: | |
114 |
|
|
121 | peercert = sock.getpeercert(True) | |
115 |
|
|
122 | peerfingerprint = util.sha1(peercert).hexdigest() | |
116 | peerfingerprint = util.sha1(peercert).hexdigest() |
|
123 | nicefingerprint = ":".join([peerfingerprint[x:x + 2] | |
117 |
|
|
124 | for x in xrange(0, len(peerfingerprint), 2)]) | |
118 | for x in xrange(0, len(peerfingerprint), 2)]) |
|
125 | if hostfingerprint: | |
119 |
if |
|
126 | if peerfingerprint.lower() != \ | |
120 |
|
|
127 | hostfingerprint.replace(':', '').lower(): | |
121 | hostfingerprint.replace(':', '').lower(): |
|
128 | raise util.Abort(_('invalid certificate for %s ' | |
122 | raise util.Abort(_('invalid certificate for %s ' |
|
129 | 'with fingerprint %s') % | |
123 |
|
|
130 | (host, nicefingerprint)) | |
124 | (host, nicefingerprint)) |
|
131 | self.ui.debug('%s certificate matched fingerprint %s\n' % | |
125 | self.ui.debug('%s certificate matched fingerprint %s\n' % |
|
132 | (host, nicefingerprint)) | |
126 | (host, nicefingerprint)) |
|
133 | else: | |
127 | else: |
|
134 | self.ui.warn(_('warning: %s certificate ' | |
128 | self.ui.warn(_('warning: %s certificate ' |
|
135 | 'with fingerprint %s not verified ' | |
129 |
|
|
136 | '(check hostfingerprints or web.cacerts ' | |
130 |
|
|
137 | 'config setting)\n') % | |
131 |
|
|
138 | (host, nicefingerprint)) | |
132 | (host, nicefingerprint)) |
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|||
133 | else: # python 2.5 ? |
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|||
134 | if hostfingerprint: |
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|||
135 | raise util.Abort(_("host fingerprint for %s can't be " |
|
|||
136 | "verified (Python too old)") % host) |
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|||
137 | self.ui.warn(_("warning: certificate for %s can't be " |
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|||
138 | "verified (Python too old)\n") % host) |
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