Golang ProblemDetailsFromDNSError Examples

Example #1

File: registration-authority.go Project: patf/boulder

func validateEmail(ctx context.Context, address string, resolver bdns.DNSResolver) (prob *probs.ProblemDetails) {
	emails, err := mail.ParseAddressList(address)
	if err != nil {
		return &probs.ProblemDetails{
			Type:   probs.InvalidEmailProblem,
			Detail: unparseableEmailDetail,
		}
	}
	if len(emails) > 1 {
		return &probs.ProblemDetails{
			Type:   probs.InvalidEmailProblem,
			Detail: multipleAddressDetail,
		}
	}
	splitEmail := strings.SplitN(emails[0].Address, "@", -1)
	domain := strings.ToLower(splitEmail[len(splitEmail)-1])
	var resultMX []string
	var resultA []net.IP
	var errMX, errA error
	var wg sync.WaitGroup
	wg.Add(2)
	go func() {
		resultMX, errMX = resolver.LookupMX(ctx, domain)
		wg.Done()
	}()
	go func() {
		resultA, errA = resolver.LookupHost(ctx, domain)
		wg.Done()
	}()
	wg.Wait()

	if errMX != nil {
		prob := bdns.ProblemDetailsFromDNSError(errMX)
		prob.Type = probs.InvalidEmailProblem
		return prob
	} else if len(resultMX) > 0 {
		return nil
	}
	if errA != nil {
		prob := bdns.ProblemDetailsFromDNSError(errA)
		prob.Type = probs.InvalidEmailProblem
		return prob
	} else if len(resultA) > 0 {
		return nil
	}

	return &probs.ProblemDetails{
		Type:   probs.InvalidEmailProblem,
		Detail: emptyDNSResponseDetail,
	}
}

Example #2

File: ra.go Project: jfrazelle/boulder

func validateEmail(ctx context.Context, address string, resolver bdns.DNSResolver) (prob *probs.ProblemDetails) {
	emails, err := mail.ParseAddressList(address)
	if err != nil {
		return probs.InvalidEmail(unparseableEmailDetail)
	}
	if len(emails) > 1 {
		return probs.InvalidEmail(multipleAddressDetail)
	}
	splitEmail := strings.SplitN(emails[0].Address, "@", -1)
	domain := strings.ToLower(splitEmail[len(splitEmail)-1])
	var resultMX []string
	var resultA []net.IP
	var errMX, errA error
	var wg sync.WaitGroup
	wg.Add(2)
	go func() {
		resultMX, errMX = resolver.LookupMX(ctx, domain)
		wg.Done()
	}()
	go func() {
		resultA, errA = resolver.LookupHost(ctx, domain)
		wg.Done()
	}()
	wg.Wait()

	// We treat timeouts as non-failures for best-effort email validation
	// See: https://github.com/letsencrypt/boulder/issues/2260
	if problemIsTimeout(errMX) || problemIsTimeout(errA) {
		return nil
	}

	if errMX != nil {
		prob := bdns.ProblemDetailsFromDNSError(errMX)
		prob.Type = probs.InvalidEmailProblem
		return prob
	} else if len(resultMX) > 0 {
		return nil
	}
	if errA != nil {
		prob := bdns.ProblemDetailsFromDNSError(errA)
		prob.Type = probs.InvalidEmailProblem
		return prob
	} else if len(resultA) > 0 {
		return nil
	}

	return probs.InvalidEmail(emptyDNSResponseDetail)
}

Example #3

File: registration-authority.go Project: paulehoffman/boulder

func validateEmail(address string, resolver bdns.DNSResolver) (prob *probs.ProblemDetails) {
	_, err := mail.ParseAddress(address)
	if err != nil {
		return &probs.ProblemDetails{
			Type:   probs.InvalidEmailProblem,
			Detail: unparseableEmailDetail,
		}
	}
	splitEmail := strings.SplitN(address, "@", -1)
	domain := strings.ToLower(splitEmail[len(splitEmail)-1])
	var resultMX []string
	var resultA []net.IP
	resultMX, err = resolver.LookupMX(domain)

	if err == nil && len(resultMX) == 0 {
		resultA, err = resolver.LookupHost(domain)
		if err == nil && len(resultA) == 0 {
			return &probs.ProblemDetails{
				Type:   probs.InvalidEmailProblem,
				Detail: emptyDNSResponseDetail,
			}
		}
	}
	if err != nil {
		dnsProblem := bdns.ProblemDetailsFromDNSError(err)
		return &probs.ProblemDetails{
			Type:   probs.InvalidEmailProblem,
			Detail: dnsProblem.Detail,
		}
	}

	return nil
}