Fix sign user_id format

Author: numbcoder

lib/sm2_crypto.rb

@@ -130,7 +130,7 @@ def sign(private_key, data, sm3_hash: false, user_id: "3132333435363738313233343
       s = ((one + da).mod_inverse(n) * (k - (r * da))).to_i % n.to_i
     end
 
-    r.to_s(16) + s.to_s(16)
+    r.to_s(16).rjust(64, "0") + s.to_s(16).rjust(64, "0")
   end
 
   # verify the signature with public_key
@@ -172,7 +172,7 @@ def verify(public_key, data, signature, sm3_hash: false, user_id: "3132333435363
 
   # ZA = H256(ENTLA || IDA || a || b || gx || gy || px || py)
   def za(public_key, user_id)
-    ida = user_id.unpack1("a*")
+    ida = [user_id].pack("H*")
     entla = [ida.size * 8].pack("n")
     a = ["FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC"].pack("H*")
     b = ["28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E93"].pack("H*")

test/test_sm2_crypto.rb

@@ -75,16 +75,24 @@ def test_get_publick_key
     assert_equal public_key, SM2Crypto.get_public_key(private_key)
   end
 
-  def test_sign
+  def test_sign_and_verify
     msg = "abc"
     sign = SM2Crypto.sign(SM2_PRIVATE_KEY, msg)
     assert_equal true, SM2Crypto.verify(SM2_PUBLIC_KEY, msg, sign)
+
+    cjk_msg = "abc1234XYZ@%& 你好，世界！#{SecureRandom.alphanumeric(rand(1000..10_000))}"
+    sign2 = SM2Crypto.sign(SM2_PRIVATE_KEY, cjk_msg)
+    assert_equal true, SM2Crypto.verify(SM2_PUBLIC_KEY, cjk_msg, sign2)
   end
 
-  def test_sign_with_hash
+  def test_sign_and_verify_with_hash
     msg = "abc"
     user_id = "313233343536373831323334353637AA"
     sign = SM2Crypto.sign(SM2_PRIVATE_KEY, msg, sm3_hash: true, user_id: user_id)
     assert_equal true, SM2Crypto.verify(SM2_PUBLIC_KEY, msg, sign, sm3_hash: true, user_id: user_id)
+
+    cjk_msg = "abc1234XYZ@%& 你好，世界！#{SecureRandom.alphanumeric(rand(1000..10_000))}"
+    sign2 = SM2Crypto.sign(SM2_PRIVATE_KEY, cjk_msg, sm3_hash: true)
+    assert_equal true, SM2Crypto.verify(SM2_PUBLIC_KEY, cjk_msg, sign2, sm3_hash: true)
   end
 end