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sm2: provide SignMessage method to comply with the [crypto.MessageSigner] interface

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Sun Yimin 2025-05-26 15:10:48 +08:00 committed by GitHub
parent fe1d170bdc
commit da0d651197
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
2 changed files with 44 additions and 0 deletions
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11
sm2/sm2_dsa.go
View File

@ -118,6 +118,17 @@ func (priv *PrivateKey) SignWithSM2(rand io.Reader, uid, msg []byte) ([]byte, er
return priv.Sign(rand, msg, NewSM2SignerOption(true, uid)) return priv.Sign(rand, msg, NewSM2SignerOption(true, uid))
} }
// SignMessage signs a message with the private key, reading randomness from rand.
// If opts is an instance of SM2SignerOption, it will use the UID from opts.
// This method is used to comply with the [crypto.MessageSigner] interface.
func (priv *PrivateKey) SignMessage(rand io.Reader, msg []byte, opts crypto.SignerOpts) ([]byte, error) {
var uid []byte
if sm2Opts, ok := opts.(*SM2SignerOption); ok {
uid = sm2Opts.uid
}
return priv.SignWithSM2(rand, uid, msg)
}
// GenerateKey generates a new SM2 private key. // GenerateKey generates a new SM2 private key.
// //
// Most applications should use [crypto/rand.Reader] as rand. Note that the // Most applications should use [crypto/rand.Reader] as rand. Note that the

33
sm2/sm2_dsa_test.go
View File

@ -424,6 +424,39 @@ func TestSignVerify(t *testing.T) {
} }
} }
func TestSignMessage(t *testing.T) {
priv, _ := GenerateKey(rand.Reader)
tests := []struct {
name string
plainText string
}{
// TODO: Add test cases.
{"less than 32", "encryption standard"},
{"equals 32", "encryption standard encryption "},
{"long than 32", "encryption standard encryption standard"},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
signature, err := priv.SignMessage(rand.Reader, []byte(tt.plainText), nil)
if err != nil {
t.Fatalf("SignMessage failed %v", err)
}
result := VerifyASN1WithSM2(&priv.PublicKey, nil, []byte(tt.plainText), signature)
if !result {
t.Fatal("verify failed")
}
signature, err = priv.SignMessage(rand.Reader, []byte(tt.plainText), NewSM2SignerOption(true, []byte("testid")))
if err != nil {
t.Fatalf("SignMessage failed %v", err)
}
result = VerifyASN1WithSM2(&priv.PublicKey, []byte("testid"), []byte(tt.plainText), signature)
if !result {
t.Fatal("verify failed")
}
})
}
}
func TestSM2Hasher(t *testing.T) { func TestSM2Hasher(t *testing.T) {
tobeHashed := []byte("hello world") tobeHashed := []byte("hello world")
keypoints, _ := hex.DecodeString("048356e642a40ebd18d29ba3532fbd9f3bbee8f027c3f6f39a5ba2f870369f9988981f5efe55d1c5cdf6c0ef2b070847a14f7fdf4272a8df09c442f3058af94ba1") keypoints, _ := hex.DecodeString("048356e642a40ebd18d29ba3532fbd9f3bbee8f027c3f6f39a5ba2f870369f9988981f5efe55d1c5cdf6c0ef2b070847a14f7fdf4272a8df09c442f3058af94ba1")