ahrav
2cab951ee5
* Start updating detectors that have two part creds to record the raw result as ID + secret. * Add more detectors. * More detectors. * More detectors. * remove comment out imports.
133 lines
3.8 KiB
Go
133 lines
3.8 KiB
Go
package alibaba
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import (
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"context"
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"crypto/hmac"
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"crypto/sha1"
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"encoding/base64"
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"math/rand"
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"net/http"
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"net/url"
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"regexp"
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"strconv"
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"strings"
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"time"
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"github.com/trufflesecurity/trufflehog/v3/pkg/common"
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"github.com/trufflesecurity/trufflehog/v3/pkg/detectors"
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"github.com/trufflesecurity/trufflehog/v3/pkg/pb/detectorspb"
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)
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type Scanner struct{}
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// Ensure the Scanner satisfies the interface at compile time.
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var _ detectors.Detector = (*Scanner)(nil)
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var (
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client = common.SaneHttpClient()
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// Make sure that your group is surrounded in boundary characters such as below to reduce false positives.
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keyPat = regexp.MustCompile(`\b([a-zA-Z0-9]{30})\b`)
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idPat = regexp.MustCompile(`\b(LTAI[a-zA-Z0-9]{17,21})[\"';\s]*`)
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)
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// Keywords are used for efficiently pre-filtering chunks.
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// Use identifiers in the secret preferably, or the provider name.
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func (s Scanner) Keywords() []string {
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return []string{"LTAI"}
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}
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func randString(n int) string {
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rand.Seed(time.Now().UnixNano())
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const alphanum = "0123456789abcdefghijklmnopqrstuvwxyz"
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var bytes = make([]byte, n)
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rand.Read(bytes)
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for i, b := range bytes {
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bytes[i] = alphanum[b%byte(len(alphanum))]
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}
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return string(bytes)
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}
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func GetSignature(input, key string) string {
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key_for_sign := []byte(key)
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h := hmac.New(sha1.New, key_for_sign)
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h.Write([]byte(input))
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return base64.StdEncoding.EncodeToString(h.Sum(nil))
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}
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func buildStringToSign(method, input string) string {
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filter := strings.Replace(input, "+", "%20", -1)
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filter = strings.Replace(filter, "%7E", "~", -1)
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filter = strings.Replace(filter, "*", "%2A", -1)
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filter = method + "&%2F&" + url.QueryEscape(filter)
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return filter
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}
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// FromData will find and optionally verify Alibaba secrets in a given set of bytes.
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func (s Scanner) FromData(ctx context.Context, verify bool, data []byte) (results []detectors.Result, err error) {
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dataStr := string(data)
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matches := keyPat.FindAllStringSubmatch(dataStr, -1)
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idMatches := idPat.FindAllStringSubmatch(dataStr, -1)
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for _, match := range matches {
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if len(match) != 2 {
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continue
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}
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resMatch := strings.TrimSpace(match[1])
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for _, idMatch := range idMatches {
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if len(idMatch) != 2 {
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continue
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}
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resIdMatch := strings.TrimSpace(idMatch[1])
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s1 := detectors.Result{
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DetectorType: detectorspb.DetectorType_Alibaba,
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Raw: []byte(resMatch),
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RawV2: []byte(resMatch + resIdMatch),
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}
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if verify {
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req, err := http.NewRequestWithContext(ctx, "GET", "http://ecs.aliyuncs.com/?", nil)
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if err != nil {
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continue
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}
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dateISO := time.Now().UTC().Format("2006-01-02T15:04:05Z07:00")
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params := req.URL.Query()
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params.Add("AccessKeyId", resIdMatch)
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params.Add("Action", "DescribeRegions")
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params.Add("Format", "JSON")
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params.Add("SignatureMethod", "HMAC-SHA1")
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params.Add("SignatureNonce", randString(16))
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params.Add("SignatureVersion", "1.0")
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params.Add("Timestamp", dateISO)
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params.Add("Version", "2014-05-26")
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stringToSign := buildStringToSign(req.Method, params.Encode())
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signature := GetSignature(stringToSign, resMatch+"&") // Get Signature HMAC SHA1
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params.Add("Signature", signature)
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req.URL.RawQuery = params.Encode()
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req.Header.Add("Content-Type", "text/xml;charset=utf-8")
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req.Header.Add("Content-Length", strconv.Itoa(len(params.Encode())))
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res, err := client.Do(req)
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if err == nil {
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defer res.Body.Close()
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if res.StatusCode >= 200 && res.StatusCode < 300 {
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s1.Verified = true
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} else {
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// This function will check false positives for common test words, but also it will make sure the key appears 'random' enough to be a real key.
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if detectors.IsKnownFalsePositive(resMatch, detectors.DefaultFalsePositives, true) {
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continue
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}
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}
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}
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}
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results = append(results, s1)
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}
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}
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return detectors.CleanResults(results), nil
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}
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