forked from TrueCloudLab/certificates
96 lines
2.6 KiB
Go
96 lines
2.6 KiB
Go
package api
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import (
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"net/http"
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"time"
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"golang.org/x/crypto/ssh"
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"github.com/smallstep/certificates/api/read"
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"github.com/smallstep/certificates/api/render"
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"github.com/smallstep/certificates/authority/provisioner"
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"github.com/smallstep/certificates/errs"
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)
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// SSHRekeyRequest is the request body of an SSH certificate request.
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type SSHRekeyRequest struct {
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OTT string `json:"ott"`
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PublicKey []byte `json:"publicKey"` //base64 encoded
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}
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// Validate validates the SSHSignRekey.
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func (s *SSHRekeyRequest) Validate() error {
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switch {
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case s.OTT == "":
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return errs.BadRequest("missing or empty ott")
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case len(s.PublicKey) == 0:
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return errs.BadRequest("missing or empty public key")
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default:
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return nil
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}
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}
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// SSHRekeyResponse is the response object that returns the SSH certificate.
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type SSHRekeyResponse struct {
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Certificate SSHCertificate `json:"crt"`
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IdentityCertificate []Certificate `json:"identityCrt,omitempty"`
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}
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// SSHRekey is an HTTP handler that reads an RekeySSHRequest with a one-time-token
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// (ott) from the body and creates a new SSH certificate with the information in
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// the request.
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func SSHRekey(w http.ResponseWriter, r *http.Request) {
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var body SSHRekeyRequest
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if err := read.JSON(r.Body, &body); err != nil {
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render.Error(w, errs.BadRequestErr(err, "error reading request body"))
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return
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}
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logOtt(w, body.OTT)
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if err := body.Validate(); err != nil {
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render.Error(w, err)
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return
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}
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publicKey, err := ssh.ParsePublicKey(body.PublicKey)
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if err != nil {
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render.Error(w, errs.BadRequestErr(err, "error parsing publicKey"))
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return
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}
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ctx := provisioner.NewContextWithMethod(r.Context(), provisioner.SSHRekeyMethod)
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ctx = provisioner.NewContextWithToken(ctx, body.OTT)
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a := mustAuthority(ctx)
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signOpts, err := a.Authorize(ctx, body.OTT)
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if err != nil {
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render.Error(w, errs.UnauthorizedErr(err))
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return
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}
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oldCert, _, err := provisioner.ExtractSSHPOPCert(body.OTT)
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if err != nil {
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render.Error(w, errs.InternalServerErr(err))
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return
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}
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newCert, err := a.RekeySSH(ctx, oldCert, publicKey, signOpts...)
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if err != nil {
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render.Error(w, errs.ForbiddenErr(err, "error rekeying ssh certificate"))
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return
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}
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// Match identity cert with the SSH cert
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notBefore := time.Unix(int64(oldCert.ValidAfter), 0)
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notAfter := time.Unix(int64(oldCert.ValidBefore), 0)
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identity, err := renewIdentityCertificate(r, notBefore, notAfter)
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if err != nil {
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render.Error(w, errs.ForbiddenErr(err, "error renewing identity certificate"))
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return
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}
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render.JSONStatus(w, &SSHRekeyResponse{
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Certificate: SSHCertificate{newCert},
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IdentityCertificate: identity,
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}, http.StatusCreated)
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}
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