annotate make_verify.py @ 19:e1aa13f2be49

Add a dictionary for postauth_nomaths, symlink to client
author Matt Johnston <matt@ucc.asn.au>
date Sun, 07 Mar 2021 14:59:13 +0800
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1 #!/usr/bin/env python3
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3 """ takes a pubkey, turns it into fuzzer-verify input """
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5 import sys
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6 import struct
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7 import re
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8 import binascii
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10 BLOB_RE=re.compile(r'(?:ssh-rsa|ecdsa-\S+|ssh-dss) ([a-zA-Z0-9/+=]+)')
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12 inp = sys.stdin.read()
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13 b64blob = BLOB_RE.search(inp).groups(1)[0]
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15 blob = binascii.a2b_base64(b64blob)
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17 sigtypelen = struct.unpack('>I', blob[:4])[0]
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18 sigtype = blob[4:4+sigtypelen]
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19 print("Type is %s" % sigtype, file=sys.stderr)
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21 # a bodgy key followed by signature
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22 # eg rfc4253
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23 # string "ssh-rsa"
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24 # string rsa_signature_blob
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25 sys.stdout.buffer.write(blob)
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26 sys.stdout.buffer.write(struct.pack('>I', sigtypelen))
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27 sys.stdout.buffer.write(sigtype)
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28 sys.stdout.buffer.write(struct.pack('>II', 4, 20))
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