fa2ee19f65
This allows callers to verify certificates using algorithms that Go
does not support (yet).
For instance, here we're verifying the ML-KEM-512 example certificate
from the LAMPS WG signed by a ML-DSA-44 public key.
https://github.com/lamps-wg/dilithium-certificates/blob/main/examples/ML-DSA-44.crt
https://github.com/lamps-wg/kyber-certificates/blob/main/example/ML-KEM-512.crt
package main
import (
"crypto/x509"
"crypto/x509/pkix"
"encoding/asn1"
"encoding/pem"
"errors"
"fmt"
"github.com/cloudflare/circl/sign/schemes"
"os"
)
func loadCert(path string) (*x509.Certificate, error) {
raw, err := os.ReadFile(path)
if err != nil {
return nil, fmt.Errorf("ReadFile(%s): %w", path, err)
}
block, _ := pem.Decode(raw)
if block == nil {
return nil, fmt.Errorf("pem.Decode(%s) failed", path)
}
return x509.ParseCertificate(block.Bytes)
}
func main() {
dsaCert, err := loadCert("ML-DSA-44.crt")
if err != nil {
panic(err)
}
kemCert, err := loadCert("ML-KEM-512.crt")
if err != nil {
panic(err)
}
roots := x509.NewCertPool()
roots.AddCert(dsaCert)
_, err = kemCert.Verify(x509.VerifyOptions{
Roots: roots,
UnknownAlgorithmVerifier: func(alg pkix.AlgorithmIdentifier,
signed, signature, pk []byte) error {
if !alg.Algorithm.Equal(asn1.ObjectIdentifier{2, 16, 840, 1, 101, 3, 4, 3, 17}) {
return errors.New("unsupported scheme")
}
scheme := schemes.ByName("ML-DSA-44")
ppk, err := scheme.UnmarshalBinaryPublicKey(pk)
if err != nil {
return err
}
if !scheme.Verify(ppk, signed, signature, nil) {
return errors.New("invalid signature")
}
return nil
},
})
if err != nil {
panic(err)
}
}
|
||
|---|---|---|
| .github | ||
| api | ||
| doc | ||
| lib | ||
| misc | ||
| src | ||
| test | ||
| .gitattributes | ||
| .gitignore | ||
| CONTRIBUTING.md | ||
| LICENSE | ||
| PATENTS | ||
| README.md | ||
| SECURITY.md | ||
| codereview.cfg | ||
| go.env | ||
README.md
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