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// Copyright 2020 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 (
macOS "crypto/x509/internal/macos"
"errors"
)
func (c *Certificate) systemVerify(opts *VerifyOptions) (chains [][]*Certificate, err error) {
certs := macOS.CFArrayCreateMutable()
defer macOS.ReleaseCFArray(certs)
leaf := macOS.SecCertificateCreateWithData(c.Raw)
macOS.CFArrayAppendValue(certs, leaf)
if opts.Intermediates != nil {
for _, lc := range opts.Intermediates.lazyCerts {
c, err := lc.getCert()
if err != nil {
return nil, err
}
sc := macOS.SecCertificateCreateWithData(c.Raw)
macOS.CFArrayAppendValue(certs, sc)
}
}
policies := macOS.CFArrayCreateMutable()
defer macOS.ReleaseCFArray(policies)
sslPolicy := macOS.SecPolicyCreateSSL(opts.DNSName)
macOS.CFArrayAppendValue(policies, sslPolicy)
trustObj, err := macOS.SecTrustCreateWithCertificates(certs, policies)
if err != nil {
return nil, err
}
defer macOS.CFRelease(trustObj)
if !opts.CurrentTime.IsZero() {
dateRef := macOS.TimeToCFDateRef(opts.CurrentTime)
defer macOS.CFRelease(dateRef)
if err := macOS.SecTrustSetVerifyDate(trustObj, dateRef); err != nil {
return nil, err
}
}
// TODO(roland): we may want to allow passing in SCTs via VerifyOptions and
// set them via SecTrustSetSignedCertificateTimestamps, since Apple will
// always enforce its SCT requirements, and there are still _some_ people
// using TLS or OCSP for that.
if err := macOS.SecTrustEvaluateWithError(trustObj); err != nil {
return nil, err
}
chain := [][]*Certificate{{}}
numCerts := macOS.SecTrustGetCertificateCount(trustObj)
for i := 0; i < numCerts; i++ {
certRef := macOS.SecTrustGetCertificateAtIndex(trustObj, i)
cert, err := exportCertificate(certRef)
if err != nil {
return nil, err
}
chain[0] = append(chain[0], cert)
}
if len(chain[0]) == 0 {
// This should _never_ happen, but to be safe
return nil, errors.New("x509: macOS certificate verification internal error")
}
if opts.DNSName != "" {
// If we have a DNS name, apply our own name verification
if err := chain[0][0].VerifyHostname(opts.DNSName); err != nil {
return nil, err
}
}
keyUsages := opts.KeyUsages
if len(keyUsages) == 0 {
keyUsages = []ExtKeyUsage{ExtKeyUsageServerAuth}
}
// If any key usage is acceptable then we're done.
for _, usage := range keyUsages {
if usage == ExtKeyUsageAny {
return chain, nil
}
}
if !checkChainForKeyUsage(chain[0], keyUsages) {
return nil, CertificateInvalidError{c, IncompatibleUsage, ""}
}
return chain, nil
}
// exportCertificate returns a *Certificate for a SecCertificateRef.
func exportCertificate(cert macOS.CFRef) (*Certificate, error) {
data, err := macOS.SecCertificateCopyData(cert)
if err != nil {
return nil, err
}
return ParseCertificate(data)
}
func loadSystemRoots() (*CertPool, error) {
return &CertPool{systemPool: true}, nil
}
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