sm2: update document

emmansun · Jan 17, 2025 · 80a264c · 80a264c
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diff --git a/docs/sm2.md b/docs/sm2.md
@@ -186,6 +186,13 @@ func ExampleVerifyASN1WithSM2() {
 }
 ```
 
+### 如何处理不用UID的签名、验签？
+#### 签名
+也是使用sm2私钥的`Sign`方法，只是```SignerOpts```传入`nil`或者其它非`SM2SignerOption`即可，那么，你自己负责预先计算杂凑值，当然如何计算杂凑值，由你自己说了算了。
+
+#### 验签
+调用`sm2.VerifyASN1`方法，同样，你自己负责预先计算杂凑值，确保杂凑算法和签名时使用的杂凑算法保持一致。
+
 ## 密钥交换协议
 这里有两个实现，一个是传统实现，位于sm2包中；另外一个参考最新go语言的实现在ecdh包中。在这里不详细介绍使用方法，一般只有tls/tlcp才会用到，普通应用通常不会涉及这一块，感兴趣的话可以参考github.com/Trisia/gotlcp中的应用。
 

diff --git a/sm2/sm2_dsa.go b/sm2/sm2_dsa.go
@@ -213,7 +213,7 @@ var defaultUID = []byte{0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x31, 0x
 // CalculateZA ZA = H256(ENTLA || IDA || a || b || xG || yG || xA || yA).
 // Compliance with GB/T 32918.2-2016 5.5.
 //
-// This function will not use default UID even the uid argument is empty.
+// This function will NOT use default UID even the uid argument is empty.
 // Reference: GM/T 0009-2023 Chapter 8.1.
 func CalculateZA(pub *ecdsa.PublicKey, uid []byte) ([]byte, error) {
 	uidLen := len(uid)
@@ -451,7 +451,7 @@ var ErrInvalidSignature = errors.New("sm2: invalid signature")
 //
 // Compliance with GB/T 32918.2-2016 regardless it's SM2 curve or not.
 // Caller should make sure the hash's correctness, in other words,
-// the caller must pre-calculate the hash value.
+// the caller must pre-compute the hash value.
 func VerifyASN1(pub *ecdsa.PublicKey, hash, sig []byte) bool {
 	switch pub.Curve.Params() {
 	case P256().Params():