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56b9a79a65
Like traditional file analyzers, we now query Zeek's `get_file_handle()` event for handles when a connection begins analyzing an embedded file. That means that Spicy-side protocol analyzers that are forwarding data into file analysis now need to call Zeek's `Files::register_protocol()` and provide a callback for computing file handles. If that's missing, Zeek will now issue a warning. This aligns with the requirements Zeek's traditional protocol analyzers. (If the EVT file defines a protocol analyzer to `replace` an existing one, that one's `register_protocol()` will be consulted.) Because Zeek's `get_file_handle()` event requires a current connection, if a Spicy file analyzer isn't directly part of a connection context (e.g., with nested files), we continue to use hardcoded, built-in file handle. Scriptland won't be consulted in that case, just like before. Closes #3440.
100 lines
4.2 KiB
Text
100 lines
4.2 KiB
Text
# @TEST-REQUIRES: have-spicy
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#
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# @TEST-EXEC: cat ssh.spicy ssh-1.spicy > ssh-test.spicy
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# @TEST-EXEC: spicyz -d -o test.hlto ssh-test.spicy ./ssh-cond.evt
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# @TEST-EXEC: zeek -r ${TRACES}/ssh/single-conn.trace test.hlto %INPUT Spicy::enable_print=T 2>&1 | sort >output-1
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#
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# @TEST-EXEC: cat x509.log | grep -v ^# | cut -f 4-5 >x509.log.tmp && mv x509.log.tmp x509.log
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# @TEST-EXEC: btest-diff x509.log
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#
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# @TEST-EXEC: cat files.log | zeek-cut sha1 filename >files.log.tmp && mv files.log.tmp files.log
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# @TEST-EXEC: btest-diff files.log
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#
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# @TEST-EXEC: cat ssh.spicy ssh-2.spicy > ssh-test.spicy
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# @TEST-EXEC: spicyz -d -o test.hlto ssh-test.spicy ./ssh-cond.evt
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# @TEST-EXEC: zeek -r ${TRACES}/ssh/single-conn.trace test.hlto %INPUT Spicy::enable_print=T 2>&1 | sort >output-2
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#
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# @TEST-EXEC: cat files.log | zeek-cut fuid filename >files.log.tmp && mv files.log.tmp files-2.log
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# @TEST-EXEC: btest-diff files-2.log
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#
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# @TEST-EXEC: TEST_DIFF_CANONIFIER=diff-canonifier-spicy btest-diff output-1
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# @TEST-EXEC: TEST_DIFF_CANONIFIER=diff-canonifier-spicy btest-diff output-2
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module SSH;
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function get_file_handle(c: connection, is_orig: bool): string
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{
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print "get_file_handle called";
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return cat(c$uid);
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}
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event zeek_init()
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{
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Analyzer::register_for_port(Analyzer::ANALYZER_SPICY_SSH, 22/tcp);
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Files::register_protocol(Analyzer::ANALYZER_SSH, [$get_file_handle=SSH::get_file_handle]); # use tag of replaced analyzer
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}
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# @TEST-START-FILE ssh.spicy
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module SSH;
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import spicy;
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import zeek;
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global file_counter = 0;
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public type Banner = unit {
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magic : /SSH-/ {
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# This is a bit of cheating.
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local d: spicy::Base64Stream;
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local dec : bytes = spicy::base64_decode(d, b"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");
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dec += spicy::base64_finish(d);
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print self.file_id;
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zeek::file_data_in(dec);
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}
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version : /[^-]*/;
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dash : /-/;
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software: /[^\r\n]*/;
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var file_id: string;
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var file_name: string = "foo-%d.txt" % ++file_counter;
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};
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on Banner::%done { zeek::file_end(self.file_id); }
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# @TEST-END-FILE
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# First test case - just let Zeek generate the File ID
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# @TEST-START-FILE ssh-1.spicy
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on Banner::%init { self.file_id = zeek::file_begin("application/x-x509-ca-cert"); }
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# @TEST-END-FILE ssh-1.spicy
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# Second test case - provide a file ID
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# @TEST-START-FILE ssh-2.spicy
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on Banner::%init { self.file_id = zeek::file_begin("application/x-x509-ca-cert", "FaAaAaAaAaAaAaAaAa"); }
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# @TEST-END-FILE ssh-2.spicy
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# @TEST-START-FILE ssh-cond.evt
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import zeek;
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protocol analyzer spicy::SSH over TCP:
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parse with SSH::Banner,
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replaces SSH;
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on SSH::Banner::software -> event have_filename($file, self.file_name);
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# @TEST-END-FILE
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# Trigger creation of `files.log`.
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@load base/protocols/ssl
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redef X509::log_x509_in_files_log = T;
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event have_filename(f: fa_file, filename: string)
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{
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f$info$filename = filename;
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}
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