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// Copyright 2022 Google LLC. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"context"
"fmt"
"time"
ct "github.com/google/certificate-transparency-go"
"github.com/google/certificate-transparency-go/x509"
"github.com/google/certificate-transparency-go/x509util"
"github.com/spf13/cobra"
"k8s.io/klog/v2"
)
var logMMD time.Duration
func init() {
cmd := cobra.Command{
Use: fmt.Sprintf("upload %s --cert_chain=file [--log_mmd=dur]", connectionFlags),
Aliases: []string{"add-chain"},
Short: "Submit a certificate (pre-)chain to the log",
Args: cobra.MaximumNArgs(0),
Run: func(cmd *cobra.Command, _ []string) {
runUpload(cmd.Context())
},
}
// TODO(pavelkalinnikov): Don't share this parameter with get-inclusion-proof.
cmd.Flags().StringVar(&certChain, "cert_chain", "", "Name of file containing certificate chain as concatenated PEM files")
cmd.Flags().DurationVar(&logMMD, "log_mmd", 24*time.Hour, "Log's maximum merge delay")
rootCmd.AddCommand(&cmd)
}
// runUpload runs the upload command.
func runUpload(ctx context.Context) {
logClient := connect(ctx)
if certChain == "" {
klog.Exitf("No certificate chain file specified with -cert_chain")
}
chain, _, _ := chainFromFile(certChain)
// Examine the leaf to see if it looks like a pre-certificate.
isPrecert := false
leaf, err := x509.ParseCertificate(chain[0].Data)
if err == nil {
count, _ := x509util.OIDInExtensions(x509.OIDExtensionCTPoison, leaf.Extensions)
if count > 0 {
isPrecert = true
fmt.Print("Uploading pre-certificate to log\n")
}
}
var sct *ct.SignedCertificateTimestamp
if isPrecert {
sct, err = logClient.AddPreChain(ctx, chain)
} else {
sct, err = logClient.AddChain(ctx, chain)
}
if err != nil {
exitWithDetails(err)
}
// Calculate the leaf hash.
leafEntry := ct.CreateX509MerkleTreeLeaf(chain[0], sct.Timestamp)
leafEntry.TimestampedEntry.Extensions = sct.Extensions
leafHash, err := ct.LeafHashForLeaf(leafEntry)
if err != nil {
klog.Exitf("Failed to create hash of leaf: %v", err)
}
// Display the SCT.
when := ct.TimestampToTime(sct.Timestamp)
fmt.Printf("Uploaded chain of %d certs to %v log at %v, timestamp: %d (%v)\n", len(chain), sct.SCTVersion, logClient.BaseURI(), sct.Timestamp, when)
fmt.Printf("LogID: %x\n", sct.LogID.KeyID[:])
fmt.Printf("LeafHash: %x\n", leafHash)
if len(sct.Extensions) > 0 {
fmt.Printf("Extensions: %x\n", sct.Extensions)
} else {
fmt.Printf("Extensions: (nil)\n")
}
fmt.Printf("Signature: %v\n", signatureToString(&sct.Signature))
age := time.Since(when)
if age > logMMD {
// SCT's timestamp is old enough that the certificate should be included.
getInclusionProofForHash(ctx, logClient, leafHash[:])
}
}
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