diff --git a/src/main/java/com/sunyard/inf/SydSVApi.java b/src/main/java/com/sunyard/inf/SydSVApi.java
index 4592b31..2ae49de 100644
--- a/src/main/java/com/sunyard/inf/SydSVApi.java
+++ b/src/main/java/com/sunyard/inf/SydSVApi.java
@@ -177,7 +177,7 @@ interface SydAttachedSVApi {
      * @return
      * 符合PKCS7标准的签名结果
      */
-    byte[] attachedSign(byte[] orgData, String sCertDN);
+    String attachedSign(byte[] orgData, String sCertDN);
 
     /**
      * 带公钥证书与原始数据的数字签名验签（遵循 PKCS#7）
@@ -186,6 +186,7 @@ interface SydAttachedSVApi {
      * @param sign 已签名数据
      * @return true 验签通过 false 验签失败
      */
+    boolean attachedVerify(String sign);
     boolean attachedVerify(byte[] sign);
 
     /**
@@ -196,6 +197,7 @@ interface SydAttachedSVApi {
      * @return 成功返回签名的原数据，失败则报错
      */
     byte[] attachedVerifyRD(byte[] sign);
+    byte[] attachedVerifyRD(String sign);
 
     /**
      * 带公钥证书与原始数据的数字签名验签（遵循 PKCS#7）
@@ -207,6 +209,7 @@ interface SydAttachedSVApi {
      * 若发送报文返回证书信息标志位为1，则返回CERT_INFO结构的证书数据
      */
     X509 attachedVerifyAndGetX509(byte[] sign);
+    X509 attachedVerifyAndGetX509(String sign);
 
     /**
      * 带公钥证书与原始数据的数字签名验签（遵循 PKCS#7）
diff --git a/src/main/java/racal/sunyard/main/SydApi4j.java b/src/main/java/racal/sunyard/main/SydApi4j.java
index 16e0f9d..bbfadba 100644
--- a/src/main/java/racal/sunyard/main/SydApi4j.java
+++ b/src/main/java/racal/sunyard/main/SydApi4j.java
@@ -10415,7 +10415,7 @@ public class SydApi4j implements SydApi {
      * @return 符合PKCS7标准的签名结果
      */
     @Override
-    public byte[] attachedSign(byte[] orgData, String sCertDN) {
+    public String attachedSign(byte[] orgData, String sCertDN) {
         sCertDN = DnUtil.verifyDn( sCertDN );
 
         Proto8018 proto = new Proto8018();
@@ -10462,7 +10462,12 @@ public class SydApi4j implements SydApi {
             throw new SydApiException(error.getInfo(), error.autoInt());
         }
 
-        return ((PacketSection) ret.get("signature")).getString().getBytes();
+        return ((PacketSection) ret.get("signature")).getString();
+    }
+
+    @Override
+    public boolean attachedVerify(String sign) {
+        return attachedVerify( sign.getBytes() );
     }
 
     @Override
@@ -10476,7 +10481,7 @@ public class SydApi4j implements SydApi {
         PacketSN sn = PacketSN.gen();
         packet.put("header", sn.getSn().array());
 
-        data.put("signData", sign);
+        data.put("signData", sign );
         data.put("flag$option", 0);
 
         // 渲染发送
@@ -10508,6 +10513,11 @@ public class SydApi4j implements SydApi {
         return true;
     }
 
+    @Override
+    public byte[] attachedVerifyRD(String sign) {
+        return attachedVerifyRD( sign.getBytes() );
+    }
+
     @Override
     public byte[] attachedVerifyRD(byte[] sign) {
         RetWrap retWrap = attachedVerifyAndGetAll(sign);
@@ -10524,6 +10534,10 @@ public class SydApi4j implements SydApi {
      * @param sign 已签名数据
      * @return 返回CERT_INFO结构的证书数据
      */
+    public X509 attachedVerifyAndGetX509(String sign) {
+        return attachedVerifyAndGetX509( sign.getBytes() );
+    }
+
     public X509 attachedVerifyAndGetX509(byte[] sign) {
         RetWrap retWrap = attachedVerifyAndGetAll( sign);
         if (retWrap == null)
@@ -10532,6 +10546,10 @@ public class SydApi4j implements SydApi {
         return (X509) retWrap.get("x509");
     }
 
+    public RetWrap attachedVerifyAndGetAll(String sign) {
+        return attachedVerifyAndGetAll( sign.getBytes() );
+    }
+
     public RetWrap attachedVerifyAndGetAll(byte[] sign) {
         Proto8019 proto = new Proto8019();
 
diff --git a/src/test/java/com/sunyard/sydapi/loadrunner/ShangTest.java b/src/test/java/com/sunyard/sydapi/loadrunner/ShangTest.java
index 6528e6f..bb5c4bc 100644
--- a/src/test/java/com/sunyard/sydapi/loadrunner/ShangTest.java
+++ b/src/test/java/com/sunyard/sydapi/loadrunner/ShangTest.java
@@ -22,7 +22,7 @@ public class ShangTest {
     }
 
     public void action(){
-        byte[] sign = api.attachedSign(testData, dn);
+        String sign = api.attachedSign(testData, dn);
         boolean ret = api.attachedVerify( sign );
 
         assert ret;
diff --git a/src/test/java/com/sunyard/sydapi/test/TestHT.java b/src/test/java/com/sunyard/sydapi/test/TestHT.java
index dd2665b..1726019 100644
--- a/src/test/java/com/sunyard/sydapi/test/TestHT.java
+++ b/src/test/java/com/sunyard/sydapi/test/TestHT.java
@@ -45,11 +45,11 @@ public class TestHT {
         byte[] orgData = "111111213323143243243".getBytes("UTF-8");
 
         // 签名
-        byte[] sign = api.attachedSign(orgData, dn);
-        System.out.println("签名结果: " + Util.bytes2HexString(sign) );
+        String sign = api.attachedSign(orgData, dn);
+        System.out.println("签名结果: " + sign );
 
         // 生成数字信封
-        RetWrap retWrap = api.generateDEByDn(dn, sign);
+        RetWrap retWrap = api.generateDEByDn(dn, sign.getBytes() );
         byte[] cipherKey = (byte[]) retWrap.get(SydApi.RET_CIPHER_KEY);
         System.out.println("数字信封: " + new String(cipherKey));
 
@@ -106,8 +106,8 @@ public class TestHT {
     public void testAttachedSignAndVerify() {
         String dn = "C=CN,O=CFCA OCA1,OU=YCCA,OU=Individual-2,CN=YCCA@黄金交易所@Zhuangj@1";
         String orgData = "111111213323143243243";
-        byte[] sign = api.attachedSign(orgData.getBytes(), dn);
-        System.out.println("签名结果: " + Util.bytes2HexString(sign) );
+        String sign = api.attachedSign(orgData.getBytes(), dn);
+        System.out.println("签名结果: " + sign);
 
         boolean verify = api.attachedVerify(sign);
         System.out.println("验签结果: " + verify);
@@ -117,8 +117,8 @@ public class TestHT {
     public void testAttachedSignAndVerifyGetX509() {
         String dn = "C=CN,O=CFCA OCA1,OU=YCCA,OU=Individual-2,CN=YCCA@黄金交易所@Zhuangj@1";
         byte[] orgData = "111111213323143243243".getBytes();
-        byte[] sign = api.attachedSign(orgData, dn);
-        System.out.println("签名结果: " + Util.bytes2HexString(sign) );
+        String sign = api.attachedSign(orgData, dn);
+        System.out.println("签名结果: " + sign );
 
         X509 verify = api.attachedVerifyAndGetX509(sign);
         System.out.println("验签结果: " + Util.bytes2HexString(verify.getPubKey()));
@@ -128,8 +128,8 @@ public class TestHT {
     public void testAttachedSignAndVerifyRD() {
         String dn = "C=CN,O=CFCA OCA1,OU=YCCA,OU=Individual-2,CN=YCCA@黄金交易所@Zhuangj@1";
         String orgData = "111111213323143243243";
-        byte[] sign = api.attachedSign(orgData.getBytes(), dn);
-        System.out.println("签名结果: " + Util.bytes2HexString(sign));
+        String sign = api.attachedSign(orgData.getBytes(), dn);
+        System.out.println("签名结果: " + sign);
 
         byte[] verify = api.attachedVerifyRD(sign);
         System.out.println("验签结果: " + Util.bytes2HexString(verify));
@@ -139,8 +139,8 @@ public class TestHT {
     public void testAttachedSignAndVerifyGetAll() {
         String dn = "C=CN,O=CFCA OCA1,OU=YCCA,OU=Individual-2,CN=YCCA@黄金交易所@Zhuangj@1";
         byte[] orgData = "111111213323143243243".getBytes();
-        byte[] sign = api.attachedSign(orgData, dn);
-        System.out.println("签名结果: " + Util.bytes2HexString(sign));
+        String sign = api.attachedSign(orgData, dn);
+        System.out.println("签名结果: " + sign);
 
         RetWrap verify = api.attachedVerifyAndGetAll(sign);
         if (verify != null) {