a685e3fc98
Vndr has a simpler configuration and allows pointing to forked packages. Additionally other docker projects are now using vndr making vendoring in distribution more consistent. Updates letsencrypt to use fork. No longer uses sub-vendored packages. Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
45 lines
1.0 KiB
Go
45 lines
1.0 KiB
Go
package dns
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import (
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"crypto/sha256"
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"crypto/sha512"
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"crypto/x509"
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"encoding/hex"
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"errors"
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"io"
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)
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// CertificateToDANE converts a certificate to a hex string as used in the TLSA or SMIMEA records.
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func CertificateToDANE(selector, matchingType uint8, cert *x509.Certificate) (string, error) {
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switch matchingType {
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case 0:
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switch selector {
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case 0:
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return hex.EncodeToString(cert.Raw), nil
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case 1:
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return hex.EncodeToString(cert.RawSubjectPublicKeyInfo), nil
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}
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case 1:
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h := sha256.New()
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switch selector {
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case 0:
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io.WriteString(h, string(cert.Raw))
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return hex.EncodeToString(h.Sum(nil)), nil
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case 1:
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io.WriteString(h, string(cert.RawSubjectPublicKeyInfo))
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return hex.EncodeToString(h.Sum(nil)), nil
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}
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case 2:
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h := sha512.New()
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switch selector {
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case 0:
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io.WriteString(h, string(cert.Raw))
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return hex.EncodeToString(h.Sum(nil)), nil
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case 1:
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io.WriteString(h, string(cert.RawSubjectPublicKeyInfo))
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return hex.EncodeToString(h.Sum(nil)), nil
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}
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}
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return "", errors.New("dns: bad MatchingType or Selector")
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}
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