435c0d9fc8
This PR switches the Nomad repository from using govendor to Go modules for managing dependencies. Aspects of the Nomad workflow remain pretty much the same. The usual Makefile targets should continue to work as they always did. The API submodule simply defers to the parent Nomad version on the repository, keeping the semantics of API versioning that currently exists.
45 lines
1.3 KiB
Go
45 lines
1.3 KiB
Go
package dns
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import (
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"crypto/sha256"
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"crypto/x509"
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"encoding/hex"
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)
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// Sign creates a SMIMEA record from an SSL certificate.
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func (r *SMIMEA) Sign(usage, selector, matchingType int, cert *x509.Certificate) (err error) {
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r.Hdr.Rrtype = TypeSMIMEA
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r.Usage = uint8(usage)
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r.Selector = uint8(selector)
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r.MatchingType = uint8(matchingType)
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r.Certificate, err = CertificateToDANE(r.Selector, r.MatchingType, cert)
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return err
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}
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// Verify verifies a SMIMEA record against an SSL certificate. If it is OK
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// a nil error is returned.
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func (r *SMIMEA) Verify(cert *x509.Certificate) error {
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c, err := CertificateToDANE(r.Selector, r.MatchingType, cert)
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if err != nil {
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return err // Not also ErrSig?
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}
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if r.Certificate == c {
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return nil
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}
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return ErrSig // ErrSig, really?
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}
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// SMIMEAName returns the ownername of a SMIMEA resource record as per the
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// format specified in RFC 'draft-ietf-dane-smime-12' Section 2 and 3
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func SMIMEAName(email, domain string) (string, error) {
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hasher := sha256.New()
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hasher.Write([]byte(email))
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// RFC Section 3: "The local-part is hashed using the SHA2-256
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// algorithm with the hash truncated to 28 octets and
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// represented in its hexadecimal representation to become the
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// left-most label in the prepared domain name"
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return hex.EncodeToString(hasher.Sum(nil)[:28]) + "." + "_smimecert." + domain, nil
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}
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