root / snf-cyclades-app / synnefo / userdata / util.py @ a3e25d12
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# Copyright 2011, 2012, 2013 GRNET S.A. All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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#
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# The views and conclusions contained in the software and documentation are
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# those of the authors and should not be interpreted as representing official
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# policies, either expressed or implied, of GRNET S.A.
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import binascii |
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from synnefo.userdata.asn1 import DerObject, DerSequence |
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def exportKey(keyobj, format='PEM'): |
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"""Export the RSA key. A string is returned
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with the encoded public or the private half
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under the selected format.
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format: 'DER' (PKCS#1) or 'PEM' (RFC1421)
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"""
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der = DerSequence() |
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if keyobj.has_private():
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keyType = "RSA PRIVATE"
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der[:] = [ 0, keyobj.n, keyobj.e, keyobj.d, keyobj.p, keyobj.q,
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keyobj.d % (keyobj.p-1), keyobj.d % (keyobj.q-1), |
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keyobj.u ] |
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else:
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keyType = "PUBLIC"
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der.append('\x30\x0D\x06\x09\x2A\x86\x48\x86\xF7\x0D\x01\x01\x01\x05\x00')
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bitmap = DerObject('BIT STRING')
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derPK = DerSequence() |
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derPK[:] = [ keyobj.n, keyobj.e ] |
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bitmap.payload = '\x00' + derPK.encode()
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der.append(bitmap.encode()) |
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if format=='DER': |
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return der.encode()
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if format=='PEM': |
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pem = "-----BEGIN %s KEY-----\n" % keyType
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binaryKey = der.encode() |
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# Each BASE64 line can take up to 64 characters (=48 bytes of data)
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chunks = [ binascii.b2a_base64(binaryKey[i:i+48]) for i in range(0, len(binaryKey), 48) ] |
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pem += ''.join(chunks)
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pem += "-----END %s KEY-----" % keyType
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return pem
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return ValueError("") |