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43 lines
1.2 KiB
Python
Executable File
43 lines
1.2 KiB
Python
Executable File
#!/usr/bin/python
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#
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# Read unencrypted PKCS#1/PKIX-compliant, PEM&DER encoded private keys on
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# stdin, print them pretty and encode back into original wire format.
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# Private keys can be generated with "openssl genrsa|gendsa" commands.
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#
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from pyasn1_modules import rfc2459, rfc2437, pem
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from pyasn1.codec.der import encoder, decoder
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import sys
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if len(sys.argv) != 1:
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print("""Usage:
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$ cat rsakey.pem | %s""" % sys.argv[0])
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sys.exit(-1)
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cnt = 0
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while 1:
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idx, substrate = pem.readPemBlocksFromFile(sys.stdin, ('-----BEGIN RSA PRIVATE KEY-----', '-----END RSA PRIVATE KEY-----'), ('-----BEGIN DSA PRIVATE KEY-----', '-----END DSA PRIVATE KEY-----') )
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if not substrate:
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break
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if idx == 0:
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asn1Spec = rfc2437.RSAPrivateKey()
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elif idx == 1:
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asn1Spec = rfc2459.DSAPrivateKey()
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else:
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break
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key, rest = decoder.decode(substrate, asn1Spec=asn1Spec)
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if rest: substrate = substrate[:-len(rest)]
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print(key.prettyPrint())
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assert encoder.encode(key, defMode=False) == substrate or \
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encoder.encode(key, defMode=True) == substrate, \
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'pkcs8 recode fails'
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cnt = cnt + 1
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print('*** %s key(s) re/serialized' % cnt)
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