62 lines
1.5 KiB
Python
62 lines
1.5 KiB
Python
import hashing
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def write_header(f, file_comment):
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"""write_header(file(wb), str)
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Writes the header to the given file."""
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assert type(file_comment) == str
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# b'SSHWOT' magic
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f.write(b'SSHWOT')
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# Separating space
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f.write(b' ')
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# Version number
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f.write(b'0')
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# b' ' + file_comment, if there is one
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if len(file_comment) > 0:
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f.write(b' ')
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assert b'\n' not in file_comment
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f.write(file_comment)
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# End of header marked with b'\n'
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f.write(b'\n')
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def write_entry(f, salt, hashed_host, fingerprint, comment):
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"""write_entry(file(wb), bytes[32], bytes[32], bytes[32], str)
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Writes an entry to the given file."""
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assert type(salt) == bytes and len(salt) == 32
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assert type(hashed_host) == bytes and len(hashed_host) == 32
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assert type(fingerprint) == bytes and len(fingerprint) == 32
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assert type(comment) == str
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# base64 encoded salt
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f.write(hashing.base64enc(salt))
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# Separating space
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f.write(b' ')
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# base64 encoded hashed_host
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f.write(hashing.base64enc(hashed_host))
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# Separating space
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f.write(b' ')
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# base64 encoded fingerprint
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f.write(hashing.base64enc(fingerprint))
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# b' ' + comment, if there is one
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if len(comment) > 0:
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f.write(b' ')
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assert '\n' not in comment
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f.write(comment.encode('utf-8'))
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# End of entry marked with b'\n'
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f.write(b'\n')
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def write(f, entries, file_comment = ''):
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"""write(file(wb), [Entry], str)
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Creates a file containing all of the entries"""
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assert type(file_comment) == str
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write_header(f, file_comment)
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for entry in entries:
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write_entry(f, entry.salt, entry.hashed_host, entry.fingerprint, entry.comment)
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