117 lines
2.7 KiB
Go
117 lines
2.7 KiB
Go
|
// Copyright 2011 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 (
|
||
|
|
"encoding/pem"
|
||
|
|
)
|
||
|
|
|
||
|
|
// CertPool is a set of certificates.
|
||
|
|
type CertPool struct {
|
||
|
|
bySubjectKeyId map[string][]int
|
||
|
|
byName map[string][]int
|
||
|
|
certs []*Certificate
|
||
|
|
}
|
||
|
|
|
||
|
|
// NewCertPool returns a new, empty CertPool.
|
||
|
|
func NewCertPool() *CertPool {
|
||
|
|
return &CertPool{
|
||
|
|
make(map[string][]int),
|
||
|
|
make(map[string][]int),
|
||
|
|
nil,
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// findVerifiedParents attempts to find certificates in s which have signed the
|
||
|
|
// given certificate. If any candidates were rejected then errCert will be set
|
||
|
|
// to one of them, arbitrarily, and err will contain the reason that it was
|
||
|
|
// rejected.
|
||
|
|
func (s *CertPool) findVerifiedParents(cert *Certificate) (parents []int, errCert *Certificate, err error) {
|
||
|
|
if s == nil {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
var candidates []int
|
||
|
|
|
||
|
|
if len(cert.AuthorityKeyId) > 0 {
|
||
|
|
candidates = s.bySubjectKeyId[string(cert.AuthorityKeyId)]
|
||
|
|
}
|
||
|
|
if len(candidates) == 0 {
|
||
|
|
candidates = s.byName[string(cert.RawIssuer)]
|
||
|
|
}
|
||
|
|
|
||
|
|
for _, c := range candidates {
|
||
|
|
if err = cert.CheckSignatureFrom(s.certs[c]); err == nil {
|
||
|
|
parents = append(parents, c)
|
||
|
|
} else {
|
||
|
|
errCert = s.certs[c]
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// AddCert adds a certificate to a pool.
|
||
|
|
func (s *CertPool) AddCert(cert *Certificate) {
|
||
|
|
if cert == nil {
|
||
|
|
panic("adding nil Certificate to CertPool")
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check that the certificate isn't being added twice.
|
||
|
|
for _, c := range s.certs {
|
||
|
|
if c.Equal(cert) {
|
||
|
|
return
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
n := len(s.certs)
|
||
|
|
s.certs = append(s.certs, cert)
|
||
|
|
|
||
|
|
if len(cert.SubjectKeyId) > 0 {
|
||
|
|
keyId := string(cert.SubjectKeyId)
|
||
|
|
s.bySubjectKeyId[keyId] = append(s.bySubjectKeyId[keyId], n)
|
||
|
|
}
|
||
|
|
name := string(cert.RawSubject)
|
||
|
|
s.byName[name] = append(s.byName[name], n)
|
||
|
|
}
|
||
|
|
|
||
|
|
// AppendCertsFromPEM attempts to parse a series of PEM encoded certificates.
|
||
|
|
// It appends any certificates found to s and returns true if any certificates
|
||
|
|
// were successfully parsed.
|
||
|
|
//
|
||
|
|
// On many Linux systems, /etc/ssl/cert.pem will contain the system wide set
|
||
|
|
// of root CAs in a format suitable for this function.
|
||
|
|
func (s *CertPool) AppendCertsFromPEM(pemCerts []byte) (ok bool) {
|
||
|
|
for len(pemCerts) > 0 {
|
||
|
|
var block *pem.Block
|
||
|
|
block, pemCerts = pem.Decode(pemCerts)
|
||
|
|
if block == nil {
|
||
|
|
break
|
||
|
|
}
|
||
|
|
if block.Type != "CERTIFICATE" || len(block.Headers) != 0 {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
|
||
|
|
cert, err := ParseCertificate(block.Bytes)
|
||
|
|
if err != nil {
|
||
|
|
continue
|
||
|
|
}
|
||
|
|
|
||
|
|
s.AddCert(cert)
|
||
|
|
ok = true
|
||
|
|
}
|
||
|
|
|
||
|
|
return
|
||
|
|
}
|
||
|
|
|
||
|
|
// Subjects returns a list of the DER-encoded subjects of
|
||
|
|
// all of the certificates in the pool.
|
||
|
|
func (s *CertPool) Subjects() (res [][]byte) {
|
||
|
|
res = make([][]byte, len(s.certs))
|
||
|
|
for i, c := range s.certs {
|
||
|
|
res[i] = c.RawSubject
|
||
|
|
}
|
||
|
|
return
|
||
|
|
}
|