RSA签名后，后端验签失败

async function signRSA(content:string){ 
  let base64=new util.Base64Helper; 
  const contentUint8Array:Uint8Array = stringToUint8Array(content) 
  let asyKeyGenerator = cryptoFramework.createAsyKeyGenerator('RSA1024|PRIMES_2') 
  let keypair=await asyKeyGenerator.generateKeyPair() 
  try { 
 
    let signAlg = "RSA1024|PKCS1|SHA1" 
    let signer = cryptoFramework.createSign(signAlg); 
    await signer.init(keypair.priKey); 
    let input1 :cryptoFramework.DataBlob = { data: contentUint8Array}; 
    let signData = await signer.sign(input1); 
    let sd = uint8ArrayToHexStr(signData.data) 
    console.log("test---hex:"+sd) 
    console.log("test---base64:"+base64.encodeToStringSync(signData.data)) 
  } catch (e) { 
    console.error('encode', "%%##iR:"+JSON.stringify(e)) 
  } 
} 
// 可理解的字符串转成字节流 
function stringToUint8Array(str: string) { 
  let arr = new Uint8Array(str.length); 
  for (let i = 0, j = str.length; i < j; ++i) { 
    arr[i] = str.charCodeAt(i); 
  } 
  return arr; 
} 
// 字节流转成可理解的字符串 
function uint8ArrayToString(array:Uint8Array) { 
  // 将UTF-8编码转换成Unicode编码 
  let out: string = ""; 
  let index: number = 0; 
  let len: number = array.length; 
  while (index < len) { 
    let character = array[index++]; 
    switch(character >> 4) { 
      case 0: 
      case 1: 
      case 2: 
      case 3: 
      case 4: 
      case 5: 
      case 6: 
      case 7: 
        out += String.fromCharCode(character); 
        break; 
      case 12: 
      case 13: 
        out += String.fromCharCode(((character & 0x1F) << 6) | (array[index++] & 0x3F)); 
        break; 
      case 14: 
        out += String.fromCharCode(((character & 0x0F) << 12) | ((array[index++] & 0x3F) << 6) | ((array[index++] & 0x3F) << 0)); 
        break; 
      default: 
        break; 
    } 
  } 
  return out; 
} 
 
//十六进制转Uint8Array 
function HexStrTouint8Array(data: string): Uint8Array { 
  return new Uint8Array(buffer.from(data, 'hex').buffer);; 
} 
function uint8ArrayToHexStr(data: Uint8Array): string { 
  let hexString = ""; 
  let i: number; 
  for (i = 0; i < data.length; i++) { 
    let char = ('00' + data[i].toString(16)).slice(-2); 
    hexString += char; 
  } 
  return hexString; 
}