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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package x509
import (
"bytes"
"crypto/md5"
"crypto/sha1"
"crypto/sha256"
"crypto/sha512"
"encoding/hex"
"encoding/json"
)
// CertificateFingerprint represents a digest/fingerprint of some data. It can
// easily be encoded to hex and JSON (as a hex string).
type CertificateFingerprint []byte
// MD5Fingerprint creates a fingerprint of data using the MD5 hash algorithm.
func MD5Fingerprint(data []byte) CertificateFingerprint {
sum := md5.Sum(data)
return sum[:]
}
// SHA1Fingerprint creates a fingerprint of data using the SHA1 hash algorithm.
func SHA1Fingerprint(data []byte) CertificateFingerprint {
sum := sha1.Sum(data)
return sum[:]
}
// SHA256Fingerprint creates a fingerprint of data using the SHA256 hash
// algorithm.
func SHA256Fingerprint(data []byte) CertificateFingerprint {
sum := sha256.Sum256(data)
return sum[:]
}
// SHA512Fingerprint creates a fingerprint of data using the SHA256 hash
// algorithm.
func SHA512Fingerprint(data []byte) CertificateFingerprint {
sum := sha512.Sum512(data)
return sum[:]
}
// Equal returns true if the fingerprints are bytewise-equal.
func (f CertificateFingerprint) Equal(other CertificateFingerprint) bool {
return bytes.Equal(f, other)
}
// Hex returns the given fingerprint encoded as a hex string.
func (f CertificateFingerprint) Hex() string {
return hex.EncodeToString(f)
}
// MarshalJSON implements the json.Marshaler interface, and marshals the
// fingerprint as a hex string.
func (f *CertificateFingerprint) MarshalJSON() ([]byte, error) {
return json.Marshal(f.Hex())
}
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