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// Copyright (c) Tailscale Inc & contributors
// SPDX-License-Identifier: BSD-3-Clause
package tailssh
import (
"fmt"
"testing"
"github.com/google/go-cmp/cmp"
)
func TestMatchAcceptEnvPattern(t *testing.T) {
testCases := []struct {
pattern string
target string
match bool
}{
{pattern: "*", target: "EXAMPLE_ENV", match: true},
{pattern: "***", target: "123456", match: true},
{pattern: "?", target: "A", match: true},
{pattern: "?", target: "123", match: false},
{pattern: "?*", target: "EXAMPLE_2", match: true},
{pattern: "?*", target: "", match: false},
{pattern: "*?", target: "A", match: true},
{pattern: "*?", target: "", match: false},
{pattern: "??", target: "CC", match: true},
{pattern: "??", target: "123", match: false},
{pattern: "*?*", target: "ABCDEFG", match: true},
{pattern: "*?*", target: "C", match: true},
{pattern: "*?*", target: "", match: false},
{pattern: "?*?", target: "ABCDEFG", match: true},
{pattern: "?*?", target: "A", match: false},
{pattern: "**?TEST", target: "_TEST", match: true},
{pattern: "**?TEST", target: "_TESTING", match: false},
{pattern: "TEST**?", target: "TEST_", match: true},
{pattern: "TEST**?", target: "A_TEST_", match: false},
{pattern: "TEST_*", target: "TEST_A", match: true},
{pattern: "TEST_*", target: "TEST_A_LONG_ENVIRONMENT_VARIABLE_NAME", match: true},
{pattern: "TEST_*", target: "TEST", match: false},
{pattern: "EXAMPLE_?_ENV", target: "EXAMPLE_A_ENV", match: true},
{pattern: "EXAMPLE_?_ENV", target: "EXAMPLE_ENV", match: false},
{pattern: "EXAMPLE_*_ENV", target: "EXAMPLE_aBcd2231---_ENV", match: true},
{pattern: "EXAMPLE_*_ENV", target: "EXAMPLEENV", match: false},
{pattern: "COMPLICA?ED_PATTERN*", target: "COMPLICATED_PATTERN_REST", match: true},
{pattern: "COMPLICA?ED_PATTERN*", target: "COMPLICATED_PATT", match: false},
{pattern: "COMPLICAT???ED_PATT??ERN", target: "COMPLICAT123ED_PATTggERN", match: true},
{pattern: "COMPLICAT???ED_PATT??ERN", target: "COMPLICATED_PATTERN", match: false},
{pattern: "DIRECT_MATCH", target: "DIRECT_MATCH", match: true},
{pattern: "DIRECT_MATCH", target: "MISS", match: false},
// OpenSSH compatibility cases
// See https://github.com/openssh/openssh-portable/blob/master/regress/unittests/match/tests.c
{pattern: "", target: "", match: true},
{pattern: "aaa", target: "", match: false},
{pattern: "", target: "aaa", match: false},
{pattern: "aaaa", target: "aaa", match: false},
{pattern: "aaa", target: "aaaa", match: false},
{pattern: "*", target: "", match: true},
{pattern: "?", target: "a", match: true},
{pattern: "a?", target: "aa", match: true},
{pattern: "*", target: "a", match: true},
{pattern: "a*", target: "aa", match: true},
{pattern: "?*", target: "aa", match: true},
{pattern: "**", target: "aa", match: true},
{pattern: "?a", target: "aa", match: true},
{pattern: "*a", target: "aa", match: true},
{pattern: "a?", target: "ba", match: false},
{pattern: "a*", target: "ba", match: false},
{pattern: "?a", target: "ab", match: false},
{pattern: "*a", target: "ab", match: false},
}
for _, tc := range testCases {
name := fmt.Sprintf("pattern_%s_target_%s", tc.pattern, tc.target)
if tc.match {
name += "_should_match"
} else {
name += "_should_not_match"
}
t.Run(name, func(t *testing.T) {
match := matchAcceptEnvPattern(tc.pattern, tc.target)
if match != tc.match {
t.Errorf("got %v, want %v", match, tc.match)
}
})
}
}
func TestFilterEnv(t *testing.T) {
testCases := []struct {
name string
acceptEnv []string
environ []string
expectedFiltered []string
wantErrMessage string
}{
{
name: "simple-direct-matches",
acceptEnv: []string{"FOO", "FOO2", "FOO_3"},
environ: []string{"FOO=BAR", "FOO2=BAZ", "FOO_3=123", "FOOOO4-2=AbCdEfG"},
expectedFiltered: []string{"FOO=BAR", "FOO2=BAZ", "FOO_3=123"},
},
{
name: "bare-wildcard",
acceptEnv: []string{"*"},
environ: []string{"FOO=BAR", "FOO2=BAZ", "FOO_3=123", "FOOOO4-2=AbCdEfG"},
expectedFiltered: []string{"FOO=BAR", "FOO2=BAZ", "FOO_3=123", "FOOOO4-2=AbCdEfG"},
},
{
name: "complex-matches",
acceptEnv: []string{"FO?", "FOOO*", "FO*5?7"},
environ: []string{"FOO=BAR", "FOO2=BAZ", "FOO_3=123", "FOOOO4-2=AbCdEfG", "FO1-kmndGamc79567=ABC", "FO57=BAR2"},
expectedFiltered: []string{"FOO=BAR", "FOOOO4-2=AbCdEfG", "FO1-kmndGamc79567=ABC"},
},
{
name: "environ-format-invalid",
acceptEnv: []string{"FO?", "FOOO*", "FO*5?7"},
environ: []string{"FOOBAR"},
expectedFiltered: nil,
wantErrMessage: `invalid environment variable: "FOOBAR". Variables must be in "KEY=VALUE" format`,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
filtered, err := filterEnv(tc.acceptEnv, tc.environ)
if err == nil && tc.wantErrMessage != "" {
t.Errorf("wanted error with message %q but error was nil", tc.wantErrMessage)
}
if err != nil && err.Error() != tc.wantErrMessage {
t.Errorf("err = %v; want %v", err, tc.wantErrMessage)
}
if diff := cmp.Diff(tc.expectedFiltered, filtered); diff != "" {
t.Errorf("unexpected filter result (-got,+want): \n%s", diff)
}
})
}
}
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