1 #----------------------------------------------------------------------
2 # Copyright (c) 2008 Board of Trustees, Princeton University
4 # Permission is hereby granted, free of charge, to any person obtaining
5 # a copy of this software and/or hardware specification (the "Work") to
6 # deal in the Work without restriction, including without limitation the
7 # rights to use, copy, modify, merge, publish, distribute, sublicense,
8 # and/or sell copies of the Work, and to permit persons to whom the Work
9 # is furnished to do so, subject to the following conditions:
11 # The above copyright notice and this permission notice shall be
12 # included in all copies or substantial portions of the Work.
14 # THE WORK IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15 # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16 # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
17 # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
18 # HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
19 # WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 # OUT OF OR IN CONNECTION WITH THE WORK OR THE USE OR OTHER DEALINGS
22 #----------------------------------------------------------------------
25 # SFA uses two crypto libraries: pyOpenSSL and M2Crypto to implement
26 # the necessary crypto functionality. Ideally just one of these libraries
27 # would be used, but unfortunately each of these libraries is independently
28 # lacking. The pyOpenSSL library is missing many necessary functions, and
29 # the M2Crypto library has crashed inside of some of the functions. The
30 # design decision is to use pyOpenSSL whenever possible as it seems more
31 # stable, and only use M2Crypto for those functions that are not possible
34 # This module exports two classes: Keypair and Certificate.
38 from __future__ import print_function
44 from tempfile import mkstemp
47 # M2Crypto is imported on the fly to minimize crashes
50 from sfa.util.faults import CertExpired, CertMissingParent, CertNotSignedByParent
51 from sfa.util.sfalogging import logger
53 # this tends to generate quite some logs for little or no value
54 debug_verify_chain = False
56 glo_passphrase_callback = None
59 # A global callback may be implemented for requesting passphrases from the
60 # user. The function will be called with three arguments:
62 # keypair_obj: the keypair object that is calling the passphrase
63 # string: the string containing the private key that's being loaded
64 # x: unknown, appears to be 0, comes from pyOpenSSL and/or m2crypto
66 # The callback should return a string containing the passphrase.
68 def set_passphrase_callback(callback_func):
69 global glo_passphrase_callback
71 glo_passphrase_callback = callback_func
74 # Sets a fixed passphrase.
76 def set_passphrase(passphrase):
77 set_passphrase_callback( lambda k,s,x: passphrase )
80 # Check to see if a passphrase works for a particular private key string.
81 # Intended to be used by passphrase callbacks for input validation.
83 def test_passphrase(string, passphrase):
85 OpenSSL.crypto.load_privatekey(OpenSSL.crypto.FILETYPE_PEM, string, (lambda x: passphrase))
90 def convert_public_key(key):
91 keyconvert_path = "/usr/bin/keyconvert.py"
92 if not os.path.isfile(keyconvert_path):
93 raise IOError("Could not find keyconvert in {}".format(keyconvert_path))
95 # we can only convert rsa keys
97 raise Exception("keyconvert: dss keys are not supported")
99 (ssh_f, ssh_fn) = tempfile.mkstemp()
100 ssl_fn = tempfile.mktemp()
104 cmd = keyconvert_path + " " + ssh_fn + " " + ssl_fn
107 # this check leaves the temporary file containing the public key so
108 # that it can be expected to see why it failed.
109 # TODO: for production, cleanup the temporary files
110 if not os.path.exists(ssl_fn):
111 raise Exception("keyconvert: generated certificate not found. keyconvert may have failed.")
115 k.load_pubkey_from_file(ssl_fn)
118 logger.log_exc("convert_public_key caught exception")
121 # remove the temporary files
122 if os.path.exists(ssh_fn):
124 if os.path.exists(ssl_fn):
128 # Public-private key pairs are implemented by the Keypair class.
129 # A Keypair object may represent both a public and private key pair, or it
130 # may represent only a public key (this usage is consistent with OpenSSL).
133 key = None # public/private keypair
134 m2key = None # public key (m2crypto format)
137 # Creates a Keypair object
138 # @param create If create==True, creates a new public/private key and
139 # stores it in the object
140 # @param string If string != None, load the keypair from the string (PEM)
141 # @param filename If filename != None, load the keypair from the file
143 def __init__(self, create=False, string=None, filename=None):
147 self.load_from_string(string)
149 self.load_from_file(filename)
152 # Create a RSA public/private key pair and store it inside the keypair object
155 self.key = OpenSSL.crypto.PKey()
156 self.key.generate_key(OpenSSL.crypto.TYPE_RSA, 2048)
159 # Save the private key to a file
160 # @param filename name of file to store the keypair in
162 def save_to_file(self, filename):
163 open(filename, 'w').write(self.as_pem())
164 self.filename = filename
167 # Load the private key from a file. Implicity the private key includes the public key.
169 def load_from_file(self, filename):
170 self.filename = filename
171 buffer = open(filename, 'r').read()
172 self.load_from_string(buffer)
175 # Load the private key from a string. Implicitly the private key includes the public key.
177 def load_from_string(self, string):
179 if glo_passphrase_callback:
180 self.key = OpenSSL.crypto.load_privatekey(
181 OpenSSL.crypto.FILETYPE_PEM, string, functools.partial(glo_passphrase_callback, self, string))
182 self.m2key = M2Crypto.EVP.load_key_string(
183 string, functools.partial(glo_passphrase_callback, self, string))
185 self.key = OpenSSL.crypto.load_privatekey(OpenSSL.crypto.FILETYPE_PEM, string)
186 self.m2key = M2Crypto.EVP.load_key_string(string)
189 # Load the public key from a string. No private key is loaded.
191 def load_pubkey_from_file(self, filename):
193 # load the m2 public key
194 m2rsakey = M2Crypto.RSA.load_pub_key(filename)
195 self.m2key = M2Crypto.EVP.PKey()
196 self.m2key.assign_rsa(m2rsakey)
198 # create an m2 x509 cert
199 m2name = M2Crypto.X509.X509_Name()
200 m2name.add_entry_by_txt(field="CN", type=0x1001, entry="junk", len=-1, loc=-1, set=0)
201 m2x509 = M2Crypto.X509.X509()
202 m2x509.set_pubkey(self.m2key)
203 m2x509.set_serial_number(0)
204 m2x509.set_issuer_name(m2name)
205 m2x509.set_subject_name(m2name)
206 ASN1 = M2Crypto.ASN1.ASN1_UTCTIME()
208 m2x509.set_not_before(ASN1)
209 m2x509.set_not_after(ASN1)
210 # x509v3 so it can have extensions
211 # prob not necc since this cert itself is junk but still...
212 m2x509.set_version(2)
213 junk_key = Keypair(create=True)
214 m2x509.sign(pkey=junk_key.get_m2_pubkey(), md="sha1")
216 # convert the m2 x509 cert to a pyopenssl x509
217 m2pem = m2x509.as_pem()
218 pyx509 = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, m2pem)
220 # get the pyopenssl pkey from the pyopenssl x509
221 self.key = pyx509.get_pubkey()
222 self.filename = filename
225 # Load the public key from a string. No private key is loaded.
227 def load_pubkey_from_string(self, string):
228 (f, fn) = tempfile.mkstemp()
231 self.load_pubkey_from_file(fn)
235 # Return the private key in PEM format.
238 return OpenSSL.crypto.dump_privatekey(OpenSSL.crypto.FILETYPE_PEM, self.key)
241 # Return an M2Crypto key object
243 def get_m2_pubkey(self):
246 self.m2key = M2Crypto.EVP.load_key_string(self.as_pem())
250 # Returns a string containing the public key represented by this object.
252 def get_pubkey_string(self):
253 m2pkey = self.get_m2_pubkey()
254 return base64.b64encode(m2pkey.as_der())
257 # Return an OpenSSL pkey object
259 def get_openssl_pkey(self):
263 # Given another Keypair object, return TRUE if the two keys are the same.
265 def is_same(self, pkey):
266 return self.as_pem() == pkey.as_pem()
268 def sign_string(self, data):
269 k = self.get_m2_pubkey()
272 return base64.b64encode(k.sign_final())
274 def verify_string(self, data, sig):
276 k = self.get_m2_pubkey()
278 k.verify_update(data)
279 return M2Crypto.m2.verify_final(k.ctx, base64.b64decode(sig), k.pkey)
281 def compute_hash(self, value):
282 return self.sign_string(str(value))
285 def get_filename(self):
286 return getattr(self,'filename',None)
288 def dump(self, *args, **kwargs):
289 print(self.dump_string(*args, **kwargs))
291 def dump_string(self):
293 result += "KEYPAIR: pubkey={:>40}...".format(self.get_pubkey_string())
294 filename = self.get_filename()
295 if filename: result += "Filename {}\n".format(filename)
299 # The certificate class implements a general purpose X509 certificate, making
300 # use of the appropriate pyOpenSSL or M2Crypto abstractions. It also adds
301 # several addition features, such as the ability to maintain a chain of
302 # parent certificates, and storage of application-specific data.
304 # Certificates include the ability to maintain a chain of parents. Each
305 # certificate includes a pointer to it's parent certificate. When loaded
306 # from a file or a string, the parent chain will be automatically loaded.
307 # When saving a certificate to a file or a string, the caller can choose
308 # whether to save the parent certificates as well.
315 # issuerSubject = None
317 isCA = None # will be a boolean once set
319 separator = "-----parent-----"
322 # Create a certificate object.
324 # @param lifeDays life of cert in days - default is 1825==5 years
325 # @param create If create==True, then also create a blank X509 certificate.
326 # @param subject If subject!=None, then create a blank certificate and set
328 # @param string If string!=None, load the certficate from the string.
329 # @param filename If filename!=None, load the certficiate from the file.
330 # @param isCA If !=None, set whether this cert is for a CA
332 def __init__(self, lifeDays=1825, create=False, subject=None, string=None, filename=None, isCA=None):
333 # these used to be defined in the class !
335 self.issuerKey = None
336 self.issuerSubject = None
340 if create or subject:
341 self.create(lifeDays)
343 self.set_subject(subject)
345 self.load_from_string(string)
347 self.load_from_file(filename)
349 # Set the CA bit if a value was supplied
353 # Create a blank X509 certificate and store it in this object.
355 def create(self, lifeDays=1825):
356 self.x509 = OpenSSL.crypto.X509()
357 # FIXME: Use different serial #s
358 self.x509.set_serial_number(3)
359 self.x509.gmtime_adj_notBefore(0) # 0 means now
360 self.x509.gmtime_adj_notAfter(lifeDays*60*60*24) # five years is default
361 self.x509.set_version(2) # x509v3 so it can have extensions
365 # Given a pyOpenSSL X509 object, store that object inside of this
366 # certificate object.
368 def load_from_pyopenssl_x509(self, x509):
372 # Load the certificate from a string
374 def load_from_string(self, string):
375 # if it is a chain of multiple certs, then split off the first one and
376 # load it (support for the ---parent--- tag as well as normal chained certs)
378 if string is None or string.strip() == "":
379 logger.warn("Empty string in load_from_string")
382 string = string.strip()
384 # If it's not in proper PEM format, wrap it
385 if string.count('-----BEGIN CERTIFICATE') == 0:
386 string = '-----BEGIN CERTIFICATE-----\n{}\n-----END CERTIFICATE-----'\
389 # If there is a PEM cert in there, but there is some other text first
390 # such as the text of the certificate, skip the text
391 beg = string.find('-----BEGIN CERTIFICATE')
393 # skipping over non cert beginning
394 string = string[beg:]
398 if string.count('-----BEGIN CERTIFICATE-----') > 1 and \
399 string.count(Certificate.separator) == 0:
400 parts = string.split('-----END CERTIFICATE-----',1)
401 parts[0] += '-----END CERTIFICATE-----'
403 parts = string.split(Certificate.separator, 1)
405 self.x509 = OpenSSL.crypto.load_certificate(OpenSSL.crypto.FILETYPE_PEM, parts[0])
407 if self.x509 is None:
408 logger.warn("Loaded from string but cert is None: {}".format(string))
410 # if there are more certs, then create a parent and let the parent load
411 # itself from the remainder of the string
412 if len(parts) > 1 and parts[1] != '':
413 self.parent = self.__class__()
414 self.parent.load_from_string(parts[1])
417 # Load the certificate from a file
419 def load_from_file(self, filename):
420 file = open(filename)
422 self.load_from_string(string)
423 self.filename = filename
426 # Save the certificate to a string.
428 # @param save_parents If save_parents==True, then also save the parent certificates.
430 def save_to_string(self, save_parents=True):
431 if self.x509 is None:
432 logger.warn("None cert in certificate.save_to_string")
434 string = OpenSSL.crypto.dump_certificate(OpenSSL.crypto.FILETYPE_PEM, self.x509)
435 if save_parents and self.parent:
436 string = string + self.parent.save_to_string(save_parents)
440 # Save the certificate to a file.
441 # @param save_parents If save_parents==True, then also save the parent certificates.
443 def save_to_file(self, filename, save_parents=True, filep=None):
444 string = self.save_to_string(save_parents=save_parents)
448 f = open(filename, 'w')
451 self.filename = filename
454 # Save the certificate to a random file in /tmp/
455 # @param save_parents If save_parents==True, then also save the parent certificates.
456 def save_to_random_tmp_file(self, save_parents=True):
457 fp, filename = mkstemp(suffix='cert', text=True)
458 fp = os.fdopen(fp, "w")
459 self.save_to_file(filename, save_parents=True, filep=fp)
463 # Sets the issuer private key and name
464 # @param key Keypair object containing the private key of the issuer
465 # @param subject String containing the name of the issuer
466 # @param cert (optional) Certificate object containing the name of the issuer
468 def set_issuer(self, key, subject=None, cert=None):
471 # it's a mistake to use subject and cert params at the same time
473 if isinstance(subject, dict) or isinstance(subject, str):
474 req = OpenSSL.crypto.X509Req()
475 reqSubject = req.get_subject()
476 if isinstance(subject, dict):
477 for key in reqSubject.keys():
478 setattr(reqSubject, key, subject[key])
480 setattr(reqSubject, "CN", subject)
482 # subject is not valid once req is out of scope, so save req
485 # if a cert was supplied, then get the subject from the cert
486 subject = cert.x509.get_subject()
488 self.issuerSubject = subject
491 # Get the issuer name
493 def get_issuer(self, which="CN"):
494 x = self.x509.get_issuer()
495 return getattr(x, which)
498 # Set the subject name of the certificate
500 def set_subject(self, name):
501 req = OpenSSL.crypto.X509Req()
502 subj = req.get_subject()
503 if isinstance(name, dict):
504 for key in name.keys():
505 setattr(subj, key, name[key])
507 setattr(subj, "CN", name)
508 self.x509.set_subject(subj)
511 # Get the subject name of the certificate
513 def get_subject(self, which="CN"):
514 x = self.x509.get_subject()
515 return getattr(x, which)
518 # Get a pretty-print subject name of the certificate
519 # let's try to make this a little more usable as is makes logs hairy
520 # FIXME: Consider adding 'urn:publicid' and 'uuid' back for GENI?
521 pretty_fields = ['email']
522 def filter_chunk(self, chunk):
523 for field in self.pretty_fields:
527 def pretty_cert(self):
529 x = self.x509.get_subject()
530 ou = getattr(x, "OU")
531 if ou: message += " OU: {}".format(ou)
532 cn = getattr(x, "CN")
533 if cn: message += " CN: {}".format(cn)
534 data = self.get_data(field='subjectAltName')
536 message += " SubjectAltName:"
538 filtered = [self.filter_chunk(chunk) for chunk in data.split()]
539 message += " ".join( [f for f in filtered if f])
540 omitted = len([f for f in filtered if not f])
542 message += "..+{} omitted".format(omitted)
547 # Get the public key of the certificate.
549 # @param key Keypair object containing the public key
551 def set_pubkey(self, key):
552 assert(isinstance(key, Keypair))
553 self.x509.set_pubkey(key.get_openssl_pkey())
556 # Get the public key of the certificate.
557 # It is returned in the form of a Keypair object.
559 def get_pubkey(self):
561 m2x509 = M2Crypto.X509.load_cert_string(self.save_to_string())
563 pkey.key = self.x509.get_pubkey()
564 pkey.m2key = m2x509.get_pubkey()
567 def set_intermediate_ca(self, val):
568 return self.set_is_ca(val)
570 # Set whether this cert is for a CA. All signers and only signers should be CAs.
571 # The local member starts unset, letting us check that you only set it once
572 # @param val Boolean indicating whether this cert is for a CA
573 def set_is_ca(self, val):
577 if self.isCA != None:
578 # Can't double set properties
579 raise Exception("Cannot set basicConstraints CA:?? more than once. "
580 "Was {}, trying to set as {}%s".format(self.isCA, val))
584 self.add_extension('basicConstraints', 1, 'CA:TRUE')
586 self.add_extension('basicConstraints', 1, 'CA:FALSE')
591 # Add an X509 extension to the certificate. Add_extension can only be called
592 # once for a particular extension name, due to limitations in the underlying
595 # @param name string containing name of extension
596 # @param value string containing value of the extension
598 def add_extension(self, name, critical, value):
602 oldExtVal = self.get_extension(name)
604 # M2Crypto LookupError when the extension isn't there (yet)
607 # This code limits you from adding the extension with the same value
608 # The method comment says you shouldn't do this with the same name
609 # But actually it (m2crypto) appears to allow you to do this.
610 if oldExtVal and oldExtVal == value:
611 # don't add this extension again
612 # just do nothing as here
614 # FIXME: What if they are trying to set with a different value?
615 # Is this ever OK? Or should we raise an exception?
617 # raise "Cannot add extension {} which had val {} with new val {}".format(name, oldExtVal, value)
619 ext = OpenSSL.crypto.X509Extension(name, critical, value)
620 self.x509.add_extensions([ext])
623 # Get an X509 extension from the certificate
625 def get_extension(self, name):
631 certstr = self.save_to_string()
632 if certstr is None or certstr == "":
634 # pyOpenSSL does not have a way to get extensions
635 m2x509 = M2Crypto.X509.load_cert_string(certstr)
637 logger.warn("No cert loaded in get_extension")
639 if m2x509.get_ext(name) is None:
641 value = m2x509.get_ext(name).get_value()
646 # Set_data is a wrapper around add_extension. It stores the parameter str in
647 # the X509 subject_alt_name extension. Set_data can only be called once, due
648 # to limitations in the underlying library.
650 def set_data(self, str, field='subjectAltName'):
651 # pyOpenSSL only allows us to add extensions, so if we try to set the
652 # same extension more than once, it will not work
653 if field in self.data:
654 raise Exception("Cannot set {} more than once".format(field))
655 self.data[field] = str
656 self.add_extension(field, 0, str)
659 # Return the data string that was previously set with set_data
661 def get_data(self, field='subjectAltName'):
662 if field in self.data:
663 return self.data[field]
666 uri = self.get_extension(field)
667 self.data[field] = uri
671 return self.data[field]
674 # Sign the certificate using the issuer private key and issuer subject previous set with set_issuer().
677 logger.debug('certificate.sign')
678 assert self.x509 != None
679 assert self.issuerSubject != None
680 assert self.issuerKey != None
681 self.x509.set_issuer(self.issuerSubject)
682 self.x509.sign(self.issuerKey.get_openssl_pkey(), self.digest)
685 # Verify the authenticity of a certificate.
686 # @param pkey is a Keypair object representing a public key. If Pkey
687 # did not sign the certificate, then an exception will be thrown.
689 def verify(self, pubkey):
691 # pyOpenSSL does not have a way to verify signatures
692 m2x509 = M2Crypto.X509.load_cert_string(self.save_to_string())
693 m2pubkey = pubkey.get_m2_pubkey()
695 # verify returns -1 or 0 on failure depending on how serious the
696 # error conditions are
697 return m2x509.verify(m2pubkey) == 1
699 # XXX alternatively, if openssl has been patched, do the much simpler:
701 # self.x509.verify(pkey.get_openssl_key())
707 # Return True if pkey is identical to the public key that is contained in the certificate.
708 # @param pkey Keypair object
710 def is_pubkey(self, pkey):
711 return self.get_pubkey().is_same(pkey)
714 # Given a certificate cert, verify that this certificate was signed by the
715 # public key contained in cert. Throw an exception otherwise.
717 # @param cert certificate object
719 def is_signed_by_cert(self, cert):
720 k = cert.get_pubkey()
721 result = self.verify(k)
725 # Set the parent certficiate.
727 # @param p certificate object.
729 def set_parent(self, p):
733 # Return the certificate object of the parent of this certificate.
735 def get_parent(self):
739 # Verification examines a chain of certificates to ensure that each parent
740 # signs the child, and that some certificate in the chain is signed by a
741 # trusted certificate.
743 # Verification is a basic recursion: <pre>
744 # if this_certificate was signed by trusted_certs:
747 # return verify_chain(parent, trusted_certs)
750 # At each recursion, the parent is tested to ensure that it did sign the
751 # child. If a parent did not sign a child, then an exception is thrown. If
752 # the bottom of the recursion is reached and the certificate does not match
753 # a trusted root, then an exception is thrown.
754 # Also require that parents are CAs.
756 # @param Trusted_certs is a list of certificates that are trusted.
759 def verify_chain(self, trusted_certs = None):
760 # Verify a chain of certificates. Each certificate must be signed by
761 # the public key contained in it's parent. The chain is recursed
762 # until a certificate is found that is signed by a trusted root.
764 # verify expiration time
765 if self.x509.has_expired():
766 if debug_verify_chain:
767 logger.debug("verify_chain: NO, Certificate {} has expired"
768 .format(self.pretty_cert()))
769 raise CertExpired(self.pretty_cert(), "client cert")
771 # if this cert is signed by a trusted_cert, then we are set
772 for trusted_cert in trusted_certs:
773 if self.is_signed_by_cert(trusted_cert):
774 # verify expiration of trusted_cert ?
775 if not trusted_cert.x509.has_expired():
776 if debug_verify_chain:
777 logger.debug("verify_chain: YES. Cert {} signed by trusted cert {}"
778 .format(self.pretty_cert(), trusted_cert.pretty_cert()))
781 if debug_verify_chain:
782 logger.debug("verify_chain: NO. Cert {} is signed by trusted_cert {}, "
783 "but that signer is expired..."
784 .format(self.pretty_cert(),trusted_cert.pretty_cert()))
785 raise CertExpired("{} signer trusted_cert {}"
786 .format(self.pretty_cert(), trusted_cert.pretty_cert()))
788 # if there is no parent, then no way to verify the chain
790 if debug_verify_chain:
791 logger.debug("verify_chain: NO. {} has no parent "
792 "and issuer {} is not in {} trusted roots"
793 .format(self.pretty_cert(), self.get_issuer(), len(trusted_certs)))
794 raise CertMissingParent("{}: Issuer {} is not one of the {} trusted roots, "
795 "and cert has no parent."
796 .format(self.pretty_cert(), self.get_issuer(), len(trusted_certs)))
798 # if it wasn't signed by the parent...
799 if not self.is_signed_by_cert(self.parent):
800 if debug_verify_chain:
801 logger.debug("verify_chain: NO. {} is not signed by parent {}, but by {}"
802 .format(self.pretty_cert(),
803 self.parent.pretty_cert(),
805 raise CertNotSignedByParent("{}: Parent {}, issuer {}"
806 .format(self.pretty_cert(),
807 self.parent.pretty_cert(),
810 # Confirm that the parent is a CA. Only CAs can be trusted as
812 # Note that trusted roots are not parents, so don't need to be
814 # Ugly - cert objects aren't parsed so we need to read the
815 # extension and hope there are no other basicConstraints
816 if not self.parent.isCA and not (self.parent.get_extension('basicConstraints') == 'CA:TRUE'):
817 logger.warn("verify_chain: cert {}'s parent {} is not a CA"
818 .format(self.pretty_cert(), self.parent.pretty_cert()))
819 raise CertNotSignedByParent("{}: Parent {} not a CA"
820 .format(self.pretty_cert(), self.parent.pretty_cert()))
822 # if the parent isn't verified...
823 if debug_verify_chain:
824 logger.debug("verify_chain: .. {}, -> verifying parent {}"
825 .format(self.pretty_cert(),self.parent.pretty_cert()))
826 self.parent.verify_chain(trusted_certs)
830 ### more introspection
831 def get_extensions(self):
833 # pyOpenSSL does not have a way to get extensions
835 m2x509 = M2Crypto.X509.load_cert_string(self.save_to_string())
836 nb_extensions = m2x509.get_ext_count()
837 logger.debug("X509 had {} extensions".format(nb_extensions))
838 for i in range(nb_extensions):
839 ext = m2x509.get_ext_at(i)
840 triples.append( (ext.get_name(), ext.get_value(), ext.get_critical(),) )
843 def get_data_names(self):
844 return self.data.keys()
846 def get_all_datas(self):
847 triples = self.get_extensions()
848 for name in self.get_data_names():
849 triples.append( (name,self.get_data(name),'data',) )
853 def get_filename(self):
854 return getattr(self,'filename',None)
856 def dump(self, *args, **kwargs):
857 print(self.dump_string(*args, **kwargs))
859 def dump_string(self, show_extensions=False):
861 result += "CERTIFICATE for {}\n".format(self.pretty_cert())
862 result += "Issued by {}\n".format(self.get_issuer())
863 filename = self.get_filename()
865 result += "Filename {}\n".format(filename)
867 all_datas = self.get_all_datas()
868 result += " has {} extensions/data attached".format(len(all_datas))
869 for n, v, c in all_datas:
871 result += " data: {}={}\n".format(n, v)
873 result += " ext: {} (crit={})=<<<{}>>>\n".format(n, c, v)