diff --git a/internal/cpuid/cpuid_amd64.go b/internal/cpuid/cpuid_amd64.go
index b7afad1..4244205 100644
--- a/internal/cpuid/cpuid_amd64.go
+++ b/internal/cpuid/cpuid_amd64.go
@@ -3,7 +3,7 @@ package cpuid
 import "github.com/emmansun/gmsm/internal/deps/cpu"
 
 var (
-	HasAES = cpu.X86.HasAES
-	HasGFMUL = cpu.X86.HasPCLMULQDQ
+	HasAES     = cpu.X86.HasAES
+	HasGFMUL   = cpu.X86.HasPCLMULQDQ
 	HasVPMSUMD = false
 )
diff --git a/mldsa/encoder.go b/mldsa/encoder.go
index ce8cf82..e2283e3 100644
--- a/mldsa/encoder.go
+++ b/mldsa/encoder.go
@@ -371,7 +371,7 @@ func bitPackSignedTwoPower19(s []byte, f ringElement) []byte {
 		b[5] = uint8(x1 >> 40)
 		b[6] = uint8(x1 >> 48)
 		b[7] = uint8(x1 >> 56)
-		
+
 		b = b[10:]
 	}
 	return s
@@ -387,7 +387,7 @@ func bitUnpackSignedTwoPower19(b []byte, f *ringElement) {
 	for i := 0; i < n; i += 4 {
 		x2 := (uint64(b[9]) << 8) | uint64(b[8])
 		x1 := uint64(b[0]) | (uint64(b[1]) << 8) | (uint64(b[2]) << 16) | (uint64(b[3]) << 24) | (uint64(b[4]) << 32) | (uint64(b[5]) << 40) | (uint64(b[6]) << 48) | (uint64(b[7]) << 56)
-		
+
 		b = b[10:]
 		f[i] = fieldSub(r, fieldElement(x1&bitsMask))
 		f[i+1] = fieldSub(r, fieldElement((x1>>20)&bitsMask))
diff --git a/mldsa/field.go b/mldsa/field.go
index 77fcb2c..3a9e70f 100644
--- a/mldsa/field.go
+++ b/mldsa/field.go
@@ -46,8 +46,8 @@ const (
 	r       = 4193792    // 2^32 mod q
 )
 
-// See FIPS 204, Algorithm 49, MontgomeryReduce() 
 func fieldReduce(a uint64) fieldElement {
+	// See FIPS 204, Algorithm 49, MontgomeryReduce()
 	t := uint32(a) * qNegInv
 	return fieldReduceOnce(uint32((a + uint64(t)*q) >> 32))
 }
@@ -243,4 +243,3 @@ func vectorCountOnes(a []ringElement) int {
 	}
 	return oneCount
 }
-
diff --git a/sm2/sm2_dsa.go b/sm2/sm2_dsa.go
index a400b06..9271008 100644
--- a/sm2/sm2_dsa.go
+++ b/sm2/sm2_dsa.go
@@ -845,7 +845,7 @@ var _p256 *sm2Curve
 func p256() *sm2Curve {
 	p256Once.Do(func() {
 		_p256 = &sm2Curve{
-			newPoint: func() *_sm2ec.SM2P256Point { return _sm2ec.NewSM2P256Point() },
+			newPoint: _sm2ec.NewSM2P256Point,
 		}
 		precomputeParams(_p256, P256())
 	})
diff --git a/smx509/cfca_csr.go b/smx509/cfca_csr.go
index 07b4559..791273d 100644
--- a/smx509/cfca_csr.go
+++ b/smx509/cfca_csr.go
@@ -159,7 +159,7 @@ func buildTmpPublicKeyAttr(key crypto.Signer, rawAttributes []asn1.RawValue, tmp
 		}
 		publicKeyBytes = make([]byte, 136)
 		// Prefix{8} || X{32} || zero{32} || Y{32} || zero{32}
-		copy(publicKeyBytes[:], tmpPublicKeyPrefix)
+		copy(publicKeyBytes, tmpPublicKeyPrefix)
 		ecPub, _ := tmpPub.(*ecdsa.PublicKey)
 		ecPub.X.FillBytes(publicKeyBytes[8:40])
 		ecPub.Y.FillBytes(publicKeyBytes[72:104])
@@ -175,7 +175,7 @@ func buildTmpPublicKeyAttr(key crypto.Signer, rawAttributes []asn1.RawValue, tmp
 	}
 	var tmpPublicKey = tmpPublicKeyInfo{
 		Version:   1,
-		PublicKey: publicKeyBytes[:],
+		PublicKey: publicKeyBytes,
 	}
 	b, err := asn1.Marshal(tmpPublicKey)
 	if err != nil {
diff --git a/smx509/x509_additional_test.go b/smx509/x509_additional_test.go
index 483596b..468cf85 100644
--- a/smx509/x509_additional_test.go
+++ b/smx509/x509_additional_test.go
@@ -393,11 +393,11 @@ func TestCheckSignatureWithDigest(t *testing.T) {
 			algo: SM2WithSM3,
 			digest: func() []byte {
 				hash, _ := sm2.CalculateSM2Hash(&sm2PrivateKey.PublicKey, rawMessage, nil)
-				return hash[:]
+				return hash
 			}(),
 			signature: func() []byte {
 				hash, _ := sm2.CalculateSM2Hash(&sm2PrivateKey.PublicKey, rawMessage, nil)
-				return mustSignSM2(t, sm2PrivateKey, hash[:])
+				return mustSignSM2(t, sm2PrivateKey, hash)
 			}(),
 			expectedError: nil,
 		},
@@ -409,7 +409,7 @@ func TestCheckSignatureWithDigest(t *testing.T) {
 			algo: SM2WithSM3,
 			digest: func() []byte {
 				hash, _ := sm2.CalculateSM2Hash(&sm2PrivateKey.PublicKey, rawMessage, nil)
-				return hash[:]
+				return hash
 			}(),
 			signature: func() []byte {
 				hash, _ := sm2.CalculateSM2Hash(&sm2PrivateKey2.PublicKey, rawMessage, nil)