diff --git a/package-lock.json b/package-lock.json
index ac706ce..dc895a5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,15 +1,14 @@
 {
     "name": "gmsm-sm2js",
-    "version": "0.6.1",
+    "version": "0.6.4",
     "lockfileVersion": 3,
     "requires": true,
     "packages": {
         "": {
             "name": "gmsm-sm2js",
-            "version": "0.6.1",
+            "version": "0.6.4",
             "license": "Apache-2.0",
             "dependencies": {
-                "gmsm-sm3js": "^0.2.0",
                 "jsrsasign": "^11.1.0"
             },
             "devDependencies": {
@@ -1663,14 +1662,6 @@
                 "url": "https://github.com/sponsors/ljharb"
             }
         },
-        "node_modules/gmsm-sm3js": {
-            "version": "0.2.0",
-            "resolved": "https://registry.npmjs.org/gmsm-sm3js/-/gmsm-sm3js-0.2.0.tgz",
-            "integrity": "sha512-z4SZH+xoQtYSIp22qwwZ0Z45Fajaxav+Y2OGlEoAVm2tK+o0fOQHowPeh91FpCCH/+p0jNiKL2G9C4T9EEQJWA==",
-            "dependencies": {
-                "long": "^5.2.3"
-            }
-        },
         "node_modules/gopd": {
             "version": "1.0.1",
             "resolved": "https://registry.npmjs.org/gopd/-/gopd-1.0.1.tgz",
@@ -2385,11 +2376,6 @@
             "integrity": "sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==",
             "dev": true
         },
-        "node_modules/long": {
-            "version": "5.2.3",
-            "resolved": "https://registry.npmjs.org/long/-/long-5.2.3.tgz",
-            "integrity": "sha512-lcHwpNoggQTObv5apGNCTdJrO69eHOZMi4BNC+rTLER8iHAqGrUVeLh/irVIM7zTw2bOXA8T6uNPeujwOLg/2Q=="
-        },
         "node_modules/loose-envify": {
             "version": "1.4.0",
             "resolved": "https://registry.npmjs.org/loose-envify/-/loose-envify-1.4.0.tgz",
diff --git a/package.json b/package.json
index c6b84bb..3597400 100644
--- a/package.json
+++ b/package.json
@@ -13,7 +13,6 @@
         "test": "standard && node src/cryptojs_sm3_test.js && node src/cryptojs_sm4_test.js && node src/sm2_test.js"
     },
     "dependencies": {
-        "gmsm-sm3js": "^0.2.0",
         "jsrsasign": "^11.1.0"
     },
     "devDependencies": {
diff --git a/src/jsrsasign_patch.js b/src/jsrsasign_patch.js
index cfb75e3..618832a 100644
--- a/src/jsrsasign_patch.js
+++ b/src/jsrsasign_patch.js
@@ -1,6 +1,7 @@
 const rs = require('jsrsasign')
 const KJUR = rs.KJUR
 const C = rs.CryptoJS
+const CEnc = C.enc
 
 function parsePBES2 (hP8Prv) {
   const pASN = rs.ASN1HEX.parse(hP8Prv)
@@ -246,10 +247,34 @@ function patchSM4 () {
   rs.asn1.x509.OID.name2oidList['sm4-CBC'] = '1.2.156.10197.1.104.2'
 }
 
+function patchEncUint8Array () {
+  CEnc.Uint8Array = CEnc.Uint8Array || {
+    stringify: function (wordArray) {
+      const bytes = []
+      const words = wordArray.words
+      const sigBytes = wordArray.sigBytes
+      for (let i = 0; i < sigBytes; i++) {
+        bytes.push((words[i >>> 2] >>> (24 - (i % 4) * 8)) & 0xff)
+      }
+      return new Uint8Array(bytes)
+    },
+
+    parse: function (uint8Array) {
+      const words = []
+      const dataLen = uint8Array.length
+      for (let i = 0; i < uint8Array.length; i++) {
+        words[i >>> 2] |= uint8Array[i] << (24 - (i % 4) * 8)
+      }
+      return C.lib.WordArray.create(words, dataLen)
+    }
+  }
+}
+
 let patched = false
 function patch () {
   if (patched) return
   patched = true
+  patchEncUint8Array()
   require('./cryptojs_sm3')
   require('./cryptojs_sm4')
   patchSM3()
diff --git a/src/sm2.js b/src/sm2.js
index a7fbc45..2832996 100644
--- a/src/sm2.js
+++ b/src/sm2.js
@@ -1,6 +1,5 @@
 const rs = require('jsrsasign')
 require('./jsrsasign_patch').patch()
-const sm3 = require('gmsm-sm3js')
 const util = require('./util')
 
 let crypto
@@ -29,6 +28,7 @@ const SM2_CURVE_PARAM_B = '28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCB
 const SM2_CURVE_PARAM_N = 'FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B21C6052B53BBF40939D54123'
 const SM2_CURVE_PARAM_GX = '32C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7'
 const SM2_CURVE_PARAM_GY = 'BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0'
+const SM2_CURVE_PARAMS_FOR_ZA = 'FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E9332C4AE2C1F1981195F9904466A39C9948FE30BBFF2660BE1715A4589334C74C7BC3736A2F4F6779C59BDCEE36B692153D0A9877CC62A474002DF32E52139F0A0'
 
 const CIPHERTEXT_ENCODING_PLAIN = 0
 const CIPHERTEXT_ENCODING_ASN1 = 1
@@ -99,14 +99,14 @@ function adaptSM2 (ecdsa) {
     }
 
     ecdsa.encryptHex = function (dataHex, opts = DEFAULT_SM2_ENCRYPT_OPTIONS) {
-      return this.encrypt(sm3.fromHex(dataHex), opts)
+      return this.encrypt(new Uint8Array(Buffer.from(dataHex, 'hex')), opts)
     }
 
     ecdsa.encryptRaw = function (data, Q, opts = DEFAULT_SM2_ENCRYPT_OPTIONS) {
       if (!opts || !(opts instanceof EncrypterOptions)) {
         opts = DEFAULT_SM2_ENCRYPT_OPTIONS
       }
-      data = sm3.normalizeInput(data)
+      data = util.normalizeInput(data)
       const n = this.ecparams.n
       const G = this.ecparams.G
       const dataLen = data.length
@@ -135,12 +135,12 @@ function adaptSM2 (ecdsa) {
         md.update(new Uint8Array(util.integerToBytes(point2.getY().toBigInteger(), SM2_BYTE_SIZE)))
         const hash = md.digestRaw()
         if (opts.getEncodingFormat() === CIPHERTEXT_ENCODING_PLAIN) {
-          return sm3.toHex(new Uint8Array(point1.getEncoded(false))) + sm3.toHex(hash) + sm3.toHex(t)
+          return Buffer.from(point1.getEncoded(false)).toString('hex') + Buffer.from(hash).toString('hex') + Buffer.from(t).toString('hex')
         }
         const derX = new rs.asn1.DERInteger({ bigint: point1.getX().toBigInteger() })
         const derY = new rs.asn1.DERInteger({ bigint: point1.getY().toBigInteger() })
-        const derC3 = new rs.asn1.DEROctetString({ hex: sm3.toHex(hash) })
-        const derC2 = new rs.asn1.DEROctetString({ hex: sm3.toHex(t) })
+        const derC3 = new rs.asn1.DEROctetString({ hex: Buffer.from(hash).toString('hex') })
+        const derC2 = new rs.asn1.DEROctetString({ hex: Buffer.from(t).toString('hex') })
         const derSeq = new rs.asn1.DERSequence({ array: [derX, derY, derC3, derC2] })
         return derSeq.getEncodedHex()
       } while (true)
@@ -155,11 +155,11 @@ function adaptSM2 (ecdsa) {
     }
 
     ecdsa.decryptHex = function (dataHex) {
-      return this.decrypt(sm3.fromHex(dataHex))
+      return this.decrypt(new Uint8Array(Buffer.from(dataHex, 'hex')))
     }
 
     ecdsa.decryptRaw = function (data, d) {
-      data = sm3.normalizeInput(data)
+      data = util.normalizeInput(data)
       const dataLen = data.length
 
       if (data[0] !== UNCOMPRESSED) {
@@ -179,7 +179,7 @@ function adaptSM2 (ecdsa) {
       for (let i = 0; i < c3.length; i++) {
         c2[i] ^= t[i]
       }
-      return sm3.toHex(c2)
+      return Buffer.from(c2).toString('hex')
     }
 
     ecdsa.signWithMessageHash = function (hashHex) {
@@ -245,7 +245,7 @@ function adaptSM2 (ecdsa) {
       if (!uid) {
         uid = DEFAULT_UID
       }
-      uid = sm3.normalizeInput(uid)
+      uid = util.normalizeInput(uid)
       const uidLen = uid.length
       if (uidLen >= 0x2000) {
         throw new Error('SM2: the uid is too long')
@@ -254,10 +254,7 @@ function adaptSM2 (ecdsa) {
       const md = new MessageDigest()
       md.update(new Uint8Array([0xff & (entla >>> 8), 0xff & entla]))
       md.update(uid)
-      md.update(sm3.fromHex(SM2_CURVE_PARAM_A)) // a
-      md.update(sm3.fromHex(SM2_CURVE_PARAM_B)) // b
-      md.update(sm3.fromHex(SM2_CURVE_PARAM_GX)) // gx
-      md.update(sm3.fromHex(SM2_CURVE_PARAM_GY)) // gy
+      md.update(new Uint8Array(Buffer.from(SM2_CURVE_PARAMS_FOR_ZA, 'hex'))) // a||b||gx||gy
       let Q
       if (this.pubKeyHex) {
         Q = rs.ECPointFp.decodeFromHex(this.ecparams.curve, this.pubKeyHex)
@@ -265,6 +262,7 @@ function adaptSM2 (ecdsa) {
         const d = new rs.BigInteger(this.prvKeyHex, 16)
         const G = this.ecparams.G
         Q = G.multiply(d)
+        this.pubKeyHex = Buffer.from(Q.getEncoded()).toString('hex')
       }
       md.update(new Uint8Array(util.integerToBytes(Q.getX().toBigInteger(), SM2_BYTE_SIZE))) // x
       md.update(new Uint8Array(util.integerToBytes(Q.getY().toBigInteger(), SM2_BYTE_SIZE))) // y
@@ -274,7 +272,7 @@ function adaptSM2 (ecdsa) {
 }
 
 function kdf (data, len) {
-  data = sm3.normalizeInput(data)
+  data = util.normalizeInput(data)
   const limit = (len + SM3_SIZE - 1) >>> SM3_SIZE_BIT_SIZE
   const countBytes = new Uint8Array(4)
   let ct = 1
@@ -306,20 +304,41 @@ class MessageDigest {
     if (useNodeSM3) {
       this.md = crypto.createHash('sm3')
     } else {
-      this.md = sm3.create()
+      this.md = rs.KJUR.crypto.Util.CRYPTOJSMESSAGEDIGESTNAME.sm3.create()
     }
   }
 
+  /**
+   * Updates the hash content with the given data
+   * @param {Uint8Array} data The Uint8Array to be hashed
+   */  
   update (data) {
-    this.md.update(data)
+    if (useNodeSM3) {
+      this.md.update(data)
+    } else {
+      this.md.update(rs.CryptoJS.enc.Uint8Array.parse(data))
+    }
   }
 
+  /**
+   * Updates the hash content with the given hex data
+   * @param {Uint8Array} hex The hex data
+   */
   updateHex (hex) {
-    this.md.update(sm3.fromHex(hex))
+    if (useNodeSM3) {
+      this.md.update(new Uint8Array(Buffer.from(hex, 'hex')))
+    } else {
+      this.md.update(rs.CryptoJS.enc.Hex.parse(hex))
+    }
   }
 
   digestRaw () {
-    return useNodeSM3 ? this.md.digest() : this.md.finalize()
+    if (useNodeSM3) {
+      return this.md.digest()
+    } else {
+      const hash = this.md.finalize()
+      return rs.CryptoJS.enc.Uint8Array.stringify(hash)
+    }
   }
 
   digest (data) {
@@ -328,8 +347,7 @@ class MessageDigest {
     }
     if (!useNodeSM3) {
       const hash = this.md.finalize()
-      this.md.reset()
-      return sm3.toHex(hash)
+      return hash.toString(rs.CryptoJS.enc.Hex)
     } else {
       const h = this.md.digest('hex')
       this.md = crypto.createHash('sm3')
@@ -552,7 +570,7 @@ function encrypt (pubkey, data, opts = DEFAULT_SM2_ENCRYPT_OPTIONS) {
  * @returns hex ans.1 format ciphertext
  */
 function plainCiphertext2ASN1 (data) {
-  data = sm3.fromHex(data)
+  data = new Uint8Array(Buffer.from(data, 'hex'))
   const dataLen = data.length
 
   if (data[0] !== UNCOMPRESSED) {
@@ -566,8 +584,8 @@ function plainCiphertext2ASN1 (data) {
   const c3 = data.subarray(65, 97)
   const derX = new rs.asn1.DERInteger({ bigint: point1.getX().toBigInteger() })
   const derY = new rs.asn1.DERInteger({ bigint: point1.getY().toBigInteger() })
-  const derC3 = new rs.asn1.DEROctetString({ hex: sm3.toHex(c3) })
-  const derC2 = new rs.asn1.DEROctetString({ hex: sm3.toHex(c2) })
+  const derC3 = new rs.asn1.DEROctetString({ hex: Buffer.from(c3).toString('hex') })
+  const derC2 = new rs.asn1.DEROctetString({ hex: Buffer.from(c2).toString('hex') })
   const derSeq = new rs.asn1.DERSequence({ array: [derX, derY, derC3, derC2] })
 
   return derSeq.getEncodedHex()
@@ -613,7 +631,7 @@ function asn1Ciphertext2Plain (hexASN1Data) {
   const c3 = aValue[2]
   const c2 = aValue[3]
 
-  return sm3.toHex(new Uint8Array(point.getEncoded(false))) + c3 + c2
+  return Buffer.from(point.getEncoded(false)).toString('hex') + c3 + c2
 }
 
 /**
@@ -625,7 +643,7 @@ function asn1Ciphertext2Plain (hexASN1Data) {
  * @returns hex plain format ciphertext
  */
 function encryptHex (pubkey, data, opts = DEFAULT_SM2_ENCRYPT_OPTIONS) {
-  return encrypt(pubkey, sm3.fromHex(data), opts)
+  return encrypt(pubkey, new Uint8Array(Buffer.from(data, 'hex')), opts)
 }
 
 /**
@@ -667,7 +685,7 @@ function decryptHex (prvKey, data) {
   if (tag === '30') {
     data = asn1Ciphertext2Plain(data)
   }
-  return decrypt(prvKey, sm3.fromHex(data))
+  return decrypt(prvKey, new Uint8Array(Buffer.from(data, 'hex')))
 }
 
 function getCurveName () {
@@ -689,7 +707,7 @@ rs.asn1.csr.CSRUtil.newCSRPEM = function (param) {
       const hCSRI = (new rs.asn1.csr.CertificationRequestInfo(this.params)).getEncodedHex()
       const sig = new Signature({ alg: this.params.sigalg })
       sig.init(this.params.sbjprvkey)
-      const sighex = sig.sm2Sign(sm3.fromHex(hCSRI))
+      const sighex = sig.sm2Sign(new Uint8Array(Buffer.from(hCSRI, 'hex')))
       this.params.sighex = sighex
     }
   }
@@ -710,7 +728,7 @@ function createX509 () {
 
     const sig = new Signature({ alg: algName })
     sig.init(pubKey)
-    return sig.sm2Verify(hSigVal, sm3.fromHex(hTbsCert))
+    return sig.sm2Verify(hSigVal, new Uint8Array(Buffer.from(hTbsCert, 'hex')))
   }
   return x
 }
diff --git a/src/sm2_test.js b/src/sm2_test.js
index 4574ba1..23c5237 100644
--- a/src/sm2_test.js
+++ b/src/sm2_test.js
@@ -1,6 +1,5 @@
 const test = require('tape')
 const rs = require('jsrsasign')
-const sm3 = require('gmsm-sm3js')
 const sm2 = require('./sm2')
 
 const publicKeyPemFromAliKmsForSign = `-----BEGIN PUBLIC KEY-----
@@ -172,7 +171,7 @@ test('SM2 parse public key pem, verify signature, both from ali KMS', function (
 test('SM2 calculate ZA', function (t) {
   const sig = sm2.createSM2Signature()
   sig.init(publicKeyPemFromAliKmsForSign)
-  const za = sm3.toHex(sig.pubKey.calculateZA())
+  const za = Buffer.from(sig.pubKey.calculateZA()).toString('hex')
   t.equal(za, '17e7fc071f1418200aeead3c5118a2f18381431d92b808a3bd1ba2d8270c2914')
   t.end()
 })
diff --git a/src/util.js b/src/util.js
index c2abcc4..3c2b4b2 100644
--- a/src/util.js
+++ b/src/util.js
@@ -11,6 +11,22 @@ function integerToBytes (i, len) {
   return bytes
 }
 
+// For convenience, let people hash a string, not just a Uint8Array
+function normalizeInput (input) {
+  let ret
+  if (input instanceof Uint8Array) {
+    ret = input
+  } else if (input instanceof Buffer) {
+    ret = new Uint8Array(input)
+  } else if (typeof input === 'string') {
+    ret = new Uint8Array(Buffer.from(input, 'utf8'))
+  } else {
+    throw new Error('Input must be an string, Buffer or Uint8Array')
+  }
+  return ret
+}
+
 module.exports = {
-  integerToBytes
+  integerToBytes,
+  normalizeInput
 }