root / lib / utils / x509.py @ 81f7ea25
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1 | c50645c0 | Michael Hanselmann | #
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2 | c50645c0 | Michael Hanselmann | #
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3 | c50645c0 | Michael Hanselmann | |
4 | c50645c0 | Michael Hanselmann | # Copyright (C) 2006, 2007, 2010, 2011 Google Inc.
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5 | c50645c0 | Michael Hanselmann | #
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6 | c50645c0 | Michael Hanselmann | # This program is free software; you can redistribute it and/or modify
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7 | c50645c0 | Michael Hanselmann | # it under the terms of the GNU General Public License as published by
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8 | c50645c0 | Michael Hanselmann | # the Free Software Foundation; either version 2 of the License, or
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9 | c50645c0 | Michael Hanselmann | # (at your option) any later version.
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10 | c50645c0 | Michael Hanselmann | #
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11 | c50645c0 | Michael Hanselmann | # This program is distributed in the hope that it will be useful, but
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12 | c50645c0 | Michael Hanselmann | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | c50645c0 | Michael Hanselmann | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | c50645c0 | Michael Hanselmann | # General Public License for more details.
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15 | c50645c0 | Michael Hanselmann | #
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16 | c50645c0 | Michael Hanselmann | # You should have received a copy of the GNU General Public License
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17 | c50645c0 | Michael Hanselmann | # along with this program; if not, write to the Free Software
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18 | c50645c0 | Michael Hanselmann | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | c50645c0 | Michael Hanselmann | # 02110-1301, USA.
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20 | c50645c0 | Michael Hanselmann | |
21 | c50645c0 | Michael Hanselmann | """Utility functions for X509.
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22 | c50645c0 | Michael Hanselmann |
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23 | c50645c0 | Michael Hanselmann | """
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24 | c50645c0 | Michael Hanselmann | |
25 | c50645c0 | Michael Hanselmann | import time |
26 | c50645c0 | Michael Hanselmann | import OpenSSL |
27 | c50645c0 | Michael Hanselmann | import re |
28 | c50645c0 | Michael Hanselmann | import datetime |
29 | c50645c0 | Michael Hanselmann | import calendar |
30 | c50645c0 | Michael Hanselmann | |
31 | c50645c0 | Michael Hanselmann | from ganeti import errors |
32 | c50645c0 | Michael Hanselmann | from ganeti import constants |
33 | c50645c0 | Michael Hanselmann | |
34 | c50645c0 | Michael Hanselmann | from ganeti.utils import text as utils_text |
35 | c50645c0 | Michael Hanselmann | from ganeti.utils import io as utils_io |
36 | c50645c0 | Michael Hanselmann | from ganeti.utils import hash as utils_hash |
37 | c50645c0 | Michael Hanselmann | |
38 | c50645c0 | Michael Hanselmann | |
39 | c50645c0 | Michael Hanselmann | HEX_CHAR_RE = r"[a-zA-Z0-9]"
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40 | c50645c0 | Michael Hanselmann | VALID_X509_SIGNATURE_SALT = re.compile("^%s+$" % HEX_CHAR_RE, re.S)
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41 | c50645c0 | Michael Hanselmann | X509_SIGNATURE = re.compile(r"^%s:\s*(?P<salt>%s+)/(?P<sign>%s+)$" %
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42 | c50645c0 | Michael Hanselmann | (re.escape(constants.X509_CERT_SIGNATURE_HEADER), |
43 | c50645c0 | Michael Hanselmann | HEX_CHAR_RE, HEX_CHAR_RE), |
44 | c50645c0 | Michael Hanselmann | re.S | re.I) |
45 | c50645c0 | Michael Hanselmann | |
46 | c50645c0 | Michael Hanselmann | # Certificate verification results
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47 | c50645c0 | Michael Hanselmann | (CERT_WARNING, |
48 | c50645c0 | Michael Hanselmann | CERT_ERROR) = range(1, 3) |
49 | c50645c0 | Michael Hanselmann | |
50 | c50645c0 | Michael Hanselmann | #: ASN1 time regexp
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51 | c50645c0 | Michael Hanselmann | _ASN1_TIME_REGEX = re.compile(r"^(\d+)([-+]\d\d)(\d\d)$")
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52 | c50645c0 | Michael Hanselmann | |
53 | c50645c0 | Michael Hanselmann | |
54 | c50645c0 | Michael Hanselmann | def _ParseAsn1Generalizedtime(value): |
55 | c50645c0 | Michael Hanselmann | """Parses an ASN1 GENERALIZEDTIME timestamp as used by pyOpenSSL.
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56 | c50645c0 | Michael Hanselmann |
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57 | c50645c0 | Michael Hanselmann | @type value: string
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58 | c50645c0 | Michael Hanselmann | @param value: ASN1 GENERALIZEDTIME timestamp
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59 | c50645c0 | Michael Hanselmann | @return: Seconds since the Epoch (1970-01-01 00:00:00 UTC)
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60 | c50645c0 | Michael Hanselmann |
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61 | c50645c0 | Michael Hanselmann | """
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62 | c50645c0 | Michael Hanselmann | m = _ASN1_TIME_REGEX.match(value) |
63 | c50645c0 | Michael Hanselmann | if m:
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64 | c50645c0 | Michael Hanselmann | # We have an offset
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65 | c50645c0 | Michael Hanselmann | asn1time = m.group(1)
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66 | c50645c0 | Michael Hanselmann | hours = int(m.group(2)) |
67 | c50645c0 | Michael Hanselmann | minutes = int(m.group(3)) |
68 | c50645c0 | Michael Hanselmann | utcoffset = (60 * hours) + minutes
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69 | c50645c0 | Michael Hanselmann | else:
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70 | c50645c0 | Michael Hanselmann | if not value.endswith("Z"): |
71 | c50645c0 | Michael Hanselmann | raise ValueError("Missing timezone") |
72 | c50645c0 | Michael Hanselmann | asn1time = value[:-1]
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73 | c50645c0 | Michael Hanselmann | utcoffset = 0
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74 | c50645c0 | Michael Hanselmann | |
75 | c50645c0 | Michael Hanselmann | parsed = time.strptime(asn1time, "%Y%m%d%H%M%S")
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76 | c50645c0 | Michael Hanselmann | |
77 | c50645c0 | Michael Hanselmann | tt = datetime.datetime(*(parsed[:7])) - datetime.timedelta(minutes=utcoffset)
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78 | c50645c0 | Michael Hanselmann | |
79 | c50645c0 | Michael Hanselmann | return calendar.timegm(tt.utctimetuple())
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80 | c50645c0 | Michael Hanselmann | |
81 | c50645c0 | Michael Hanselmann | |
82 | c50645c0 | Michael Hanselmann | def GetX509CertValidity(cert): |
83 | c50645c0 | Michael Hanselmann | """Returns the validity period of the certificate.
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84 | c50645c0 | Michael Hanselmann |
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85 | c50645c0 | Michael Hanselmann | @type cert: OpenSSL.crypto.X509
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86 | c50645c0 | Michael Hanselmann | @param cert: X509 certificate object
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87 | c50645c0 | Michael Hanselmann |
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88 | c50645c0 | Michael Hanselmann | """
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89 | c50645c0 | Michael Hanselmann | # The get_notBefore and get_notAfter functions are only supported in
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90 | c50645c0 | Michael Hanselmann | # pyOpenSSL 0.7 and above.
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91 | c50645c0 | Michael Hanselmann | try:
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92 | c50645c0 | Michael Hanselmann | get_notbefore_fn = cert.get_notBefore |
93 | c50645c0 | Michael Hanselmann | except AttributeError: |
94 | c50645c0 | Michael Hanselmann | not_before = None
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95 | c50645c0 | Michael Hanselmann | else:
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96 | c50645c0 | Michael Hanselmann | not_before_asn1 = get_notbefore_fn() |
97 | c50645c0 | Michael Hanselmann | |
98 | c50645c0 | Michael Hanselmann | if not_before_asn1 is None: |
99 | c50645c0 | Michael Hanselmann | not_before = None
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100 | c50645c0 | Michael Hanselmann | else:
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101 | c50645c0 | Michael Hanselmann | not_before = _ParseAsn1Generalizedtime(not_before_asn1) |
102 | c50645c0 | Michael Hanselmann | |
103 | c50645c0 | Michael Hanselmann | try:
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104 | c50645c0 | Michael Hanselmann | get_notafter_fn = cert.get_notAfter |
105 | c50645c0 | Michael Hanselmann | except AttributeError: |
106 | c50645c0 | Michael Hanselmann | not_after = None
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107 | c50645c0 | Michael Hanselmann | else:
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108 | c50645c0 | Michael Hanselmann | not_after_asn1 = get_notafter_fn() |
109 | c50645c0 | Michael Hanselmann | |
110 | c50645c0 | Michael Hanselmann | if not_after_asn1 is None: |
111 | c50645c0 | Michael Hanselmann | not_after = None
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112 | c50645c0 | Michael Hanselmann | else:
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113 | c50645c0 | Michael Hanselmann | not_after = _ParseAsn1Generalizedtime(not_after_asn1) |
114 | c50645c0 | Michael Hanselmann | |
115 | c50645c0 | Michael Hanselmann | return (not_before, not_after)
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116 | c50645c0 | Michael Hanselmann | |
117 | c50645c0 | Michael Hanselmann | |
118 | c50645c0 | Michael Hanselmann | def _VerifyCertificateInner(expired, not_before, not_after, now, |
119 | c50645c0 | Michael Hanselmann | warn_days, error_days): |
120 | c50645c0 | Michael Hanselmann | """Verifies certificate validity.
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121 | c50645c0 | Michael Hanselmann |
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122 | c50645c0 | Michael Hanselmann | @type expired: bool
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123 | c50645c0 | Michael Hanselmann | @param expired: Whether pyOpenSSL considers the certificate as expired
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124 | c50645c0 | Michael Hanselmann | @type not_before: number or None
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125 | c50645c0 | Michael Hanselmann | @param not_before: Unix timestamp before which certificate is not valid
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126 | c50645c0 | Michael Hanselmann | @type not_after: number or None
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127 | c50645c0 | Michael Hanselmann | @param not_after: Unix timestamp after which certificate is invalid
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128 | c50645c0 | Michael Hanselmann | @type now: number
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129 | c50645c0 | Michael Hanselmann | @param now: Current time as Unix timestamp
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130 | c50645c0 | Michael Hanselmann | @type warn_days: number or None
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131 | c50645c0 | Michael Hanselmann | @param warn_days: How many days before expiration a warning should be reported
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132 | c50645c0 | Michael Hanselmann | @type error_days: number or None
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133 | c50645c0 | Michael Hanselmann | @param error_days: How many days before expiration an error should be reported
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134 | c50645c0 | Michael Hanselmann |
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135 | c50645c0 | Michael Hanselmann | """
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136 | c50645c0 | Michael Hanselmann | if expired:
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137 | c50645c0 | Michael Hanselmann | msg = "Certificate is expired"
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138 | c50645c0 | Michael Hanselmann | |
139 | c50645c0 | Michael Hanselmann | if not_before is not None and not_after is not None: |
140 | c50645c0 | Michael Hanselmann | msg += (" (valid from %s to %s)" %
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141 | c50645c0 | Michael Hanselmann | (utils_text.FormatTime(not_before), |
142 | c50645c0 | Michael Hanselmann | utils_text.FormatTime(not_after))) |
143 | c50645c0 | Michael Hanselmann | elif not_before is not None: |
144 | c50645c0 | Michael Hanselmann | msg += " (valid from %s)" % utils_text.FormatTime(not_before)
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145 | c50645c0 | Michael Hanselmann | elif not_after is not None: |
146 | c50645c0 | Michael Hanselmann | msg += " (valid until %s)" % utils_text.FormatTime(not_after)
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147 | c50645c0 | Michael Hanselmann | |
148 | c50645c0 | Michael Hanselmann | return (CERT_ERROR, msg)
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149 | c50645c0 | Michael Hanselmann | |
150 | c50645c0 | Michael Hanselmann | elif not_before is not None and not_before > now: |
151 | c50645c0 | Michael Hanselmann | return (CERT_WARNING,
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152 | c50645c0 | Michael Hanselmann | "Certificate not yet valid (valid from %s)" %
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153 | c50645c0 | Michael Hanselmann | utils_text.FormatTime(not_before)) |
154 | c50645c0 | Michael Hanselmann | |
155 | c50645c0 | Michael Hanselmann | elif not_after is not None: |
156 | c50645c0 | Michael Hanselmann | remaining_days = int((not_after - now) / (24 * 3600)) |
157 | c50645c0 | Michael Hanselmann | |
158 | c50645c0 | Michael Hanselmann | msg = "Certificate expires in about %d days" % remaining_days
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159 | c50645c0 | Michael Hanselmann | |
160 | c50645c0 | Michael Hanselmann | if error_days is not None and remaining_days <= error_days: |
161 | c50645c0 | Michael Hanselmann | return (CERT_ERROR, msg)
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162 | c50645c0 | Michael Hanselmann | |
163 | c50645c0 | Michael Hanselmann | if warn_days is not None and remaining_days <= warn_days: |
164 | c50645c0 | Michael Hanselmann | return (CERT_WARNING, msg)
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165 | c50645c0 | Michael Hanselmann | |
166 | c50645c0 | Michael Hanselmann | return (None, None) |
167 | c50645c0 | Michael Hanselmann | |
168 | c50645c0 | Michael Hanselmann | |
169 | c50645c0 | Michael Hanselmann | def VerifyX509Certificate(cert, warn_days, error_days): |
170 | a3d32770 | Iustin Pop | """Verifies a certificate for LUClusterVerify.
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171 | c50645c0 | Michael Hanselmann |
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172 | c50645c0 | Michael Hanselmann | @type cert: OpenSSL.crypto.X509
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173 | c50645c0 | Michael Hanselmann | @param cert: X509 certificate object
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174 | c50645c0 | Michael Hanselmann | @type warn_days: number or None
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175 | c50645c0 | Michael Hanselmann | @param warn_days: How many days before expiration a warning should be reported
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176 | c50645c0 | Michael Hanselmann | @type error_days: number or None
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177 | c50645c0 | Michael Hanselmann | @param error_days: How many days before expiration an error should be reported
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178 | c50645c0 | Michael Hanselmann |
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179 | c50645c0 | Michael Hanselmann | """
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180 | c50645c0 | Michael Hanselmann | # Depending on the pyOpenSSL version, this can just return (None, None)
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181 | c50645c0 | Michael Hanselmann | (not_before, not_after) = GetX509CertValidity(cert) |
182 | c50645c0 | Michael Hanselmann | |
183 | c50645c0 | Michael Hanselmann | return _VerifyCertificateInner(cert.has_expired(), not_before, not_after,
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184 | c50645c0 | Michael Hanselmann | time.time(), warn_days, error_days) |
185 | c50645c0 | Michael Hanselmann | |
186 | c50645c0 | Michael Hanselmann | |
187 | c50645c0 | Michael Hanselmann | def SignX509Certificate(cert, key, salt): |
188 | c50645c0 | Michael Hanselmann | """Sign a X509 certificate.
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189 | c50645c0 | Michael Hanselmann |
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190 | c50645c0 | Michael Hanselmann | An RFC822-like signature header is added in front of the certificate.
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191 | c50645c0 | Michael Hanselmann |
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192 | c50645c0 | Michael Hanselmann | @type cert: OpenSSL.crypto.X509
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193 | c50645c0 | Michael Hanselmann | @param cert: X509 certificate object
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194 | c50645c0 | Michael Hanselmann | @type key: string
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195 | c50645c0 | Michael Hanselmann | @param key: Key for HMAC
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196 | c50645c0 | Michael Hanselmann | @type salt: string
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197 | c50645c0 | Michael Hanselmann | @param salt: Salt for HMAC
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198 | c50645c0 | Michael Hanselmann | @rtype: string
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199 | c50645c0 | Michael Hanselmann | @return: Serialized and signed certificate in PEM format
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200 | c50645c0 | Michael Hanselmann |
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201 | c50645c0 | Michael Hanselmann | """
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202 | c50645c0 | Michael Hanselmann | if not VALID_X509_SIGNATURE_SALT.match(salt): |
203 | c50645c0 | Michael Hanselmann | raise errors.GenericError("Invalid salt: %r" % salt) |
204 | c50645c0 | Michael Hanselmann | |
205 | c50645c0 | Michael Hanselmann | # Dumping as PEM here ensures the certificate is in a sane format
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206 | c50645c0 | Michael Hanselmann | cert_pem = OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, cert) |
207 | c50645c0 | Michael Hanselmann | |
208 | c50645c0 | Michael Hanselmann | return ("%s: %s/%s\n\n%s" % |
209 | c50645c0 | Michael Hanselmann | (constants.X509_CERT_SIGNATURE_HEADER, salt, |
210 | c50645c0 | Michael Hanselmann | utils_hash.Sha1Hmac(key, cert_pem, salt=salt), |
211 | c50645c0 | Michael Hanselmann | cert_pem)) |
212 | c50645c0 | Michael Hanselmann | |
213 | c50645c0 | Michael Hanselmann | |
214 | c50645c0 | Michael Hanselmann | def _ExtractX509CertificateSignature(cert_pem): |
215 | c50645c0 | Michael Hanselmann | """Helper function to extract signature from X509 certificate.
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216 | c50645c0 | Michael Hanselmann |
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217 | c50645c0 | Michael Hanselmann | """
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218 | c50645c0 | Michael Hanselmann | # Extract signature from original PEM data
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219 | c50645c0 | Michael Hanselmann | for line in cert_pem.splitlines(): |
220 | c50645c0 | Michael Hanselmann | if line.startswith("---"): |
221 | c50645c0 | Michael Hanselmann | break
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222 | c50645c0 | Michael Hanselmann | |
223 | c50645c0 | Michael Hanselmann | m = X509_SIGNATURE.match(line.strip()) |
224 | c50645c0 | Michael Hanselmann | if m:
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225 | c50645c0 | Michael Hanselmann | return (m.group("salt"), m.group("sign")) |
226 | c50645c0 | Michael Hanselmann | |
227 | c50645c0 | Michael Hanselmann | raise errors.GenericError("X509 certificate signature is missing") |
228 | c50645c0 | Michael Hanselmann | |
229 | c50645c0 | Michael Hanselmann | |
230 | c50645c0 | Michael Hanselmann | def LoadSignedX509Certificate(cert_pem, key): |
231 | c50645c0 | Michael Hanselmann | """Verifies a signed X509 certificate.
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232 | c50645c0 | Michael Hanselmann |
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233 | c50645c0 | Michael Hanselmann | @type cert_pem: string
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234 | c50645c0 | Michael Hanselmann | @param cert_pem: Certificate in PEM format and with signature header
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235 | c50645c0 | Michael Hanselmann | @type key: string
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236 | c50645c0 | Michael Hanselmann | @param key: Key for HMAC
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237 | c50645c0 | Michael Hanselmann | @rtype: tuple; (OpenSSL.crypto.X509, string)
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238 | c50645c0 | Michael Hanselmann | @return: X509 certificate object and salt
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239 | c50645c0 | Michael Hanselmann |
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240 | c50645c0 | Michael Hanselmann | """
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241 | c50645c0 | Michael Hanselmann | (salt, signature) = _ExtractX509CertificateSignature(cert_pem) |
242 | c50645c0 | Michael Hanselmann | |
243 | c50645c0 | Michael Hanselmann | # Load certificate
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244 | c50645c0 | Michael Hanselmann | cert = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, cert_pem) |
245 | c50645c0 | Michael Hanselmann | |
246 | c50645c0 | Michael Hanselmann | # Dump again to ensure it's in a sane format
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247 | c50645c0 | Michael Hanselmann | sane_pem = OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, cert) |
248 | c50645c0 | Michael Hanselmann | |
249 | c50645c0 | Michael Hanselmann | if not utils_hash.VerifySha1Hmac(key, sane_pem, signature, salt=salt): |
250 | c50645c0 | Michael Hanselmann | raise errors.GenericError("X509 certificate signature is invalid") |
251 | c50645c0 | Michael Hanselmann | |
252 | c50645c0 | Michael Hanselmann | return (cert, salt)
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253 | c50645c0 | Michael Hanselmann | |
254 | c50645c0 | Michael Hanselmann | |
255 | c50645c0 | Michael Hanselmann | def GenerateSelfSignedX509Cert(common_name, validity): |
256 | c50645c0 | Michael Hanselmann | """Generates a self-signed X509 certificate.
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257 | c50645c0 | Michael Hanselmann |
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258 | c50645c0 | Michael Hanselmann | @type common_name: string
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259 | c50645c0 | Michael Hanselmann | @param common_name: commonName value
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260 | c50645c0 | Michael Hanselmann | @type validity: int
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261 | c50645c0 | Michael Hanselmann | @param validity: Validity for certificate in seconds
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262 | b6267745 | Andrea Spadaccini | @return: a tuple of strings containing the PEM-encoded private key and
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263 | b6267745 | Andrea Spadaccini | certificate
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264 | c50645c0 | Michael Hanselmann |
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265 | c50645c0 | Michael Hanselmann | """
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266 | c50645c0 | Michael Hanselmann | # Create private and public key
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267 | c50645c0 | Michael Hanselmann | key = OpenSSL.crypto.PKey() |
268 | c50645c0 | Michael Hanselmann | key.generate_key(OpenSSL.crypto.TYPE_RSA, constants.RSA_KEY_BITS) |
269 | c50645c0 | Michael Hanselmann | |
270 | c50645c0 | Michael Hanselmann | # Create self-signed certificate
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271 | c50645c0 | Michael Hanselmann | cert = OpenSSL.crypto.X509() |
272 | c50645c0 | Michael Hanselmann | if common_name:
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273 | c50645c0 | Michael Hanselmann | cert.get_subject().CN = common_name |
274 | c50645c0 | Michael Hanselmann | cert.set_serial_number(1)
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275 | c50645c0 | Michael Hanselmann | cert.gmtime_adj_notBefore(0)
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276 | c50645c0 | Michael Hanselmann | cert.gmtime_adj_notAfter(validity) |
277 | c50645c0 | Michael Hanselmann | cert.set_issuer(cert.get_subject()) |
278 | c50645c0 | Michael Hanselmann | cert.set_pubkey(key) |
279 | c50645c0 | Michael Hanselmann | cert.sign(key, constants.X509_CERT_SIGN_DIGEST) |
280 | c50645c0 | Michael Hanselmann | |
281 | c50645c0 | Michael Hanselmann | key_pem = OpenSSL.crypto.dump_privatekey(OpenSSL.crypto.FILETYPE_PEM, key) |
282 | c50645c0 | Michael Hanselmann | cert_pem = OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, cert) |
283 | c50645c0 | Michael Hanselmann | |
284 | c50645c0 | Michael Hanselmann | return (key_pem, cert_pem)
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285 | c50645c0 | Michael Hanselmann | |
286 | c50645c0 | Michael Hanselmann | |
287 | c50645c0 | Michael Hanselmann | def GenerateSelfSignedSslCert(filename, common_name=constants.X509_CERT_CN, |
288 | c50645c0 | Michael Hanselmann | validity=constants.X509_CERT_DEFAULT_VALIDITY): |
289 | c50645c0 | Michael Hanselmann | """Legacy function to generate self-signed X509 certificate.
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290 | c50645c0 | Michael Hanselmann |
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291 | c50645c0 | Michael Hanselmann | @type filename: str
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292 | c50645c0 | Michael Hanselmann | @param filename: path to write certificate to
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293 | c50645c0 | Michael Hanselmann | @type common_name: string
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294 | c50645c0 | Michael Hanselmann | @param common_name: commonName value
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295 | c50645c0 | Michael Hanselmann | @type validity: int
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296 | c50645c0 | Michael Hanselmann | @param validity: validity of certificate in number of days
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297 | b6267745 | Andrea Spadaccini | @return: a tuple of strings containing the PEM-encoded private key and
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298 | b6267745 | Andrea Spadaccini | certificate
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299 | c50645c0 | Michael Hanselmann |
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300 | c50645c0 | Michael Hanselmann | """
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301 | c50645c0 | Michael Hanselmann | # TODO: Investigate using the cluster name instead of X505_CERT_CN for
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302 | c50645c0 | Michael Hanselmann | # common_name, as cluster-renames are very seldom, and it'd be nice if RAPI
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303 | c50645c0 | Michael Hanselmann | # and node daemon certificates have the proper Subject/Issuer.
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304 | c50645c0 | Michael Hanselmann | (key_pem, cert_pem) = GenerateSelfSignedX509Cert(common_name, |
305 | c50645c0 | Michael Hanselmann | validity * 24 * 60 * 60) |
306 | c50645c0 | Michael Hanselmann | |
307 | c50645c0 | Michael Hanselmann | utils_io.WriteFile(filename, mode=0400, data=key_pem + cert_pem)
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308 | b6267745 | Andrea Spadaccini | return (key_pem, cert_pem) |