mirror of
https://github.com/openziti/ziti.git
synced 2026-10-14 08:10:17 +00:00
Andrew Martinez
136 lines
2.9 KiB
Go
136 lines
2.9 KiB
Go
/*
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Copyright NetFoundry, Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cert
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import (
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"bytes"
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"crypto/sha1"
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"strings"
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)
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type Fingerprints map[string]*x509.Certificate
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func (fingerprints Fingerprints) Contains(fp string) bool {
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if _, matchingFingerprints := fingerprints[fp]; matchingFingerprints {
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return true
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}
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return false
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}
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func (fingerprints Fingerprints) HasAny(fps []string) (string, bool) {
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for _, fp := range fps {
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if _, matchingFingerprints := fingerprints[fp]; matchingFingerprints {
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return fp, true
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}
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}
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return "", false
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}
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func (fingerprints Fingerprints) Prints() []string {
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var ret []string
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for k := range fingerprints {
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ret = append(ret, k)
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}
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return ret
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}
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func NewFingerprintGenerator() FingerprintGenerator {
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return &defaultFingerprintGenerator{}
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}
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type FingerprintGenerator interface {
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FromCert(cert *x509.Certificate) string
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FromCerts(certs []*x509.Certificate) Fingerprints
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FromRaw(raw []byte) string
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FromPem(pem []byte) string
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}
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type defaultFingerprintGenerator struct{}
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func firstCertBlock(pemBytes []byte) (*pem.Block, []byte) {
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var block *pem.Block
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for len(pemBytes) > 0 {
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pemLength := len(pemBytes)
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block, pemBytes = pem.Decode(pemBytes)
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if pemLength == len(pemBytes) {
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//pem isn't parsing, we received not blocks, pemBytes should shrink on each Decode()
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return nil, nil
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}
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if block == nil {
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continue
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}
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if block.Type == "CERTIFICATE" {
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return block, pemBytes
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}
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}
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return nil, nil
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}
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func (fpg *defaultFingerprintGenerator) FromPem(cert []byte) string {
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block, _ := firstCertBlock(cert)
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if block == nil {
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return ""
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}
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derBytes := block.Bytes
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c, err := x509.ParseCertificate(derBytes)
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if err != nil {
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return ""
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}
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return fpg.FromCert(c)
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}
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func (fpg *defaultFingerprintGenerator) FromCert(cert *x509.Certificate) string {
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return fpg.FromRaw(cert.Raw)
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}
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func (fpg *defaultFingerprintGenerator) FromCerts(certs []*x509.Certificate) Fingerprints {
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fps := make(Fingerprints)
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for _, cert := range certs {
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fp := fpg.FromCert(cert)
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fps[fp] = cert
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}
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return fps
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}
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func (fpg *defaultFingerprintGenerator) FromRaw(raw []byte) string {
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// #nosec
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return fmt.Sprintf("%x", sha1.Sum(raw))
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}
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func (fpg *defaultFingerprintGenerator) toHex(f []byte) string {
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var buf bytes.Buffer
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for i, b := range f {
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if i > 0 {
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fmt.Fprintf(&buf, ":")
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}
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fmt.Fprintf(&buf, "%02x", b)
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}
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return strings.ToUpper(buf.String())
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}
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