func Verify()

in server/signedcontainer/verify.go [41:84]

• 37 lines of code
• 9 McCabe index (conditional complexity)

func Verify(imageDigest string, signatures []*ImageSignature) (*VerifyResult, error) {
	numSignatures := len(signatures)
	if numSignatures == 0 {
		return &VerifyResult{}, nil
	} else if numSignatures > maxSignatureCount {
		return &VerifyResult{}, fmt.Errorf("got %v signatures, should be less than the limit %d", numSignatures, maxSignatureCount)
	}

	validSigs := make([]*VerifiedSignature, numSignatures)
	validationErrs := make([]error, numSignatures)

	// Perform signature verification.
	var wg sync.WaitGroup
	for i, sig := range signatures {
		wg.Add(1)
		go func(index int, s *ImageSignature) {
			defer wg.Done()
			verified, err := verifySignature(imageDigest, s)
			if err != nil {
				validationErrs[index] = err
			} else {
				validSigs[index] = verified
			}
		}(i, sig)
	}
	wg.Wait()

	var sigs []*VerifiedSignature
	for _, sig := range validSigs {
		if sig != nil {
			sigs = append(sigs, sig)
		}
	}

	var errs []error
	for _, err := range validationErrs {
		if err != nil {
			errs = append(errs, err)
		}
	}

	return &VerifyResult{sigs, errs}, nil

}