# Functions
AESDecryptMsg ciphertext = AES_Encrypt[random(16B) + msg_len(4B) + rawXMLMsg + appId] 参考：github.com/chanxuehong/wechat.v2.
AesECBDecrypt will decrypt data with PKCS5Padding.
AESEncryptMsg ciphertext = AES_Encrypt[random(16B) + msg_len(4B) + rawXMLMsg + appId] 参考：github.com/chanxuehong/wechat.v2.
CalculateSign 计算签名.
DecodeWithCommonError 将返回值按照CommonError解析.
DecodeWithError 将返回值按照解析.
DecryptMsg 消息解密.
EncryptMsg 加密消息.
GetCurrTS return current timestamps.
HTTPGet get 请求.
HTTPGetContext get 请求.
HTTPPost post 请求.
HTTPPostContext post 请求.
NewECBDecryptor returns a BlockMode which decrypts in electronic code book mode, using the given Block.
NewECBEncryptor returns a BlockMode which encrypts in electronic code book mode, using the given Block.
OrderParam order params.
ParamSign 计算所传参数的签名.
PKCS5Padding -.
PKCS5UnPadding -.
PostFile 上传文件.
PostJSON post json 数据请求.
PostJSONWithRespContentType post json数据请求，且返回数据类型.
PostMultipartForm 上传文件或其他多个字段.
PostXML perform a HTTP/POST request with XML body.
PostXMLWithTLS perform a HTTP/POST request with XML body and TLS.
RandomStr 随机生成字符串.
RSADecrypt 数据解密.
RSADecryptBase64 Base64解码后再次进行RSA解密.
Signature sha1签名.
SliceChunk 用于将字符串切片分块.