84 lines
2.2 KiB
Go
84 lines
2.2 KiB
Go
package sendgrid
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import (
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"context"
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"fmt"
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"net/http"
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"regexp"
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"strings"
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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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"github.com/trufflesecurity/trufflehog/v3/pkg/common"
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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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keyPat = regexp.MustCompile(detectors.PrefixRegex([]string{"sendgrid"}) + `(SG\.[\w\-_]{20,24}\.[\w\-_]{39,50})\b`)
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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{"SG."}
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}
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// FromData will find and optionally verify Sendgrid 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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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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res := strings.TrimSpace(match[1])
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s := detectors.Result{
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DetectorType: detectorspb.DetectorType_SendGrid,
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Raw: []byte(res),
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}
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if verify {
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// there are a few endpoints we can check, but templates seems the least sensitive.
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// 403 will be issued if the scope is wrong but the key is correct
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baseURL := "https://api.sendgrid.com/v3/templates"
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// test `read_user` scope
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req, err := http.NewRequestWithContext(ctx, "GET", baseURL, nil)
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if err != nil {
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continue
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}
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req.Header.Add("Authorization", fmt.Sprintf("Bearer %s", res))
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req.Header.Add("Content-Type", "application/json")
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res, err := client.Do(req)
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if err == nil {
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res.Body.Close() // The request body is unused.
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// 200 means good key and has `templates` scope
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// 403 means good key but not the right scope
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// 401 is bad key
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if res.StatusCode == http.StatusOK || res.StatusCode == http.StatusForbidden {
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s.Verified = true
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}
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}
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}
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if !s.Verified && detectors.IsKnownFalsePositive(string(s.Raw), detectors.DefaultFalsePositives, true) {
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continue
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}
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results = append(results, s)
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}
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return
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}
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