Source file src/github.com/miekg/dns/tlsa.go

Documentation: github.com/miekg/dns

     1  package dns
     2  
     3  import (
     4  	"crypto/x509"
     5  	"net"
     6  	"strconv"
     7  )
     8  
     9  // Sign creates a TLSA record from an SSL certificate.
    10  func (r *TLSA) Sign(usage, selector, matchingType int, cert *x509.Certificate) (err error) {
    11  	r.Hdr.Rrtype = TypeTLSA
    12  	r.Usage = uint8(usage)
    13  	r.Selector = uint8(selector)
    14  	r.MatchingType = uint8(matchingType)
    15  
    16  	r.Certificate, err = CertificateToDANE(r.Selector, r.MatchingType, cert)
    17  	return err
    18  }
    19  
    20  // Verify verifies a TLSA record against an SSL certificate. If it is OK
    21  // a nil error is returned.
    22  func (r *TLSA) Verify(cert *x509.Certificate) error {
    23  	c, err := CertificateToDANE(r.Selector, r.MatchingType, cert)
    24  	if err != nil {
    25  		return err // Not also ErrSig?
    26  	}
    27  	if r.Certificate == c {
    28  		return nil
    29  	}
    30  	return ErrSig // ErrSig, really?
    31  }
    32  
    33  // TLSAName returns the ownername of a TLSA resource record as per the
    34  // rules specified in RFC 6698, Section 3.
    35  func TLSAName(name, service, network string) (string, error) {
    36  	if !IsFqdn(name) {
    37  		return "", ErrFqdn
    38  	}
    39  	p, err := net.LookupPort(network, service)
    40  	if err != nil {
    41  		return "", err
    42  	}
    43  	return "_" + strconv.Itoa(p) + "._" + network + "." + name, nil
    44  }
    45  

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