forked from TrueCloudLab/certificates
104 lines
2.8 KiB
Go
104 lines
2.8 KiB
Go
package softcas
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import (
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"context"
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"crypto"
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"crypto/x509"
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"errors"
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"fmt"
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"time"
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"github.com/smallstep/certificates/cas/apiv1"
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"go.step.sm/crypto/x509util"
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)
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func init() {
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apiv1.Register(apiv1.SoftCAS, func(ctx context.Context, opts apiv1.Options) (apiv1.CertificateAuthorityService, error) {
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return New(ctx, opts)
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})
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}
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var now = func() time.Time {
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return time.Now()
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}
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// SoftCAS implements a Certificate Authority Service using Golang or KMS
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// crypto. This is the default CAS used in step-ca.
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type SoftCAS struct {
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Issuer *x509.Certificate
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Signer crypto.Signer
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}
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// New creates a new CertificateAuthorityService implementation using Golang or KMS
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// crypto.
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func New(ctx context.Context, opts apiv1.Options) (*SoftCAS, error) {
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switch {
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case opts.Issuer == nil:
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return nil, errors.New("softCAS 'issuer' cannot be nil")
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case opts.Signer == nil:
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return nil, errors.New("softCAS 'signer' cannot be nil")
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}
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return &SoftCAS{
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Issuer: opts.Issuer,
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Signer: opts.Signer,
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}, nil
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}
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// CreateCertificate signs a new certificate using Golang or KMS crypto.
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func (c *SoftCAS) CreateCertificate(req *apiv1.CreateCertificateRequest) (*apiv1.CreateCertificateResponse, error) {
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switch {
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case req.Template == nil:
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return nil, errors.New("createCertificateRequest `template` cannot be nil")
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case req.Lifetime == 0:
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return nil, errors.New("createCertificateRequest `lifetime` cannot be 0")
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}
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t := now()
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req.Template.NotBefore = t.Add(-1 * req.Backdate)
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req.Template.NotAfter = t.Add(req.Lifetime)
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req.Template.Issuer = c.Issuer.Subject
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cert, err := x509util.CreateCertificate(req.Template, c.Issuer, req.Template.PublicKey, c.Signer)
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if err != nil {
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return nil, err
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}
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return &apiv1.CreateCertificateResponse{
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Certificate: cert,
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CertificateChain: []*x509.Certificate{
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c.Issuer,
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},
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}, nil
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}
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// RenewCertificate signs the given certificate template using Golang or KMS crypto.
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func (c *SoftCAS) RenewCertificate(req *apiv1.RenewCertificateRequest) (*apiv1.RenewCertificateResponse, error) {
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switch {
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case req.Template == nil:
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return nil, errors.New("createCertificateRequest `template` cannot be nil")
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case req.Lifetime == 0:
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return nil, errors.New("createCertificateRequest `lifetime` cannot be 0")
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}
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t := now()
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req.Template.NotBefore = t.Add(-1 * req.Backdate)
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req.Template.NotAfter = t.Add(req.Lifetime)
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req.Template.Issuer = c.Issuer.Subject
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cert, err := x509util.CreateCertificate(req.Template, c.Issuer, req.Template.PublicKey, c.Signer)
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if err != nil {
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return nil, err
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}
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return &apiv1.RenewCertificateResponse{
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Certificate: cert,
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CertificateChain: []*x509.Certificate{
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c.Issuer,
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},
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}, nil
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}
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// RevokeCertificate revokes the given certificate in step-ca.
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func (c *SoftCAS) RevokeCertificate(req *apiv1.RevokeCertificateRequest) (*apiv1.RevokeCertificateResponse, error) {
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return nil, fmt.Errorf("not implemented")
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}
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