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authorCarmen Hanish <cyhanish@google.com>2021-09-22 14:56:26 -0700
committergVisor bot <gvisor-bot@google.com>2021-09-22 15:01:56 -0700
commit4f67756752002dc72bb64cdecd1fa17746f8217f (patch)
tree0f5e3b052020ae633b968f69969e0839753947a6
parent5768a147b124efbeff2800794da7ba961146af19 (diff)
Change EcdsaVerify to specifically P-384 and compute the SHA384 digest.
PiperOrigin-RevId: 398336708
-rw-r--r--pkg/crypto/crypto_stdlib.go15
1 files changed, 11 insertions, 4 deletions
diff --git a/pkg/crypto/crypto_stdlib.go b/pkg/crypto/crypto_stdlib.go
index 69e867386..28eba2ff6 100644
--- a/pkg/crypto/crypto_stdlib.go
+++ b/pkg/crypto/crypto_stdlib.go
@@ -19,14 +19,21 @@ package crypto
import (
"crypto/ecdsa"
+ "crypto/elliptic"
"crypto/sha512"
+ "fmt"
"math/big"
)
-// EcdsaVerify verifies the signature in r, s of hash using ECDSA and the
-// public key, pub. Its return value records whether the signature is valid.
-func EcdsaVerify(pub *ecdsa.PublicKey, hash []byte, r, s *big.Int) (bool, error) {
- return ecdsa.Verify(pub, hash, r, s), nil
+// EcdsaP384Sha384Verify verifies the signature in r, s of hash using ECDSA
+// P384 + SHA 384 and the public key, pub. Its return value records whether
+// the signature is valid.
+func EcdsaP384Sha384Verify(pub *ecdsa.PublicKey, data []byte, r, s *big.Int) (bool, error) {
+ if pub.Curve != elliptic.P384() {
+ return false, fmt.Errorf("unsupported key curve: want P-384, got %v", pub.Curve)
+ }
+ digest := sha512.Sum384(data)
+ return ecdsa.Verify(pub, digest[:], r, s), nil
}
// SumSha384 returns the SHA384 checksum of the data.