# User registration/Signing (optional)

WeChat background to the owner initiated user registration.

# 1, request parameters

Parameter Name	type	Required	Remarks
appid	string	And	Mini Programs
appidmch_id	string	And	Payment Merchant Number
nuncio_st	string	And	Random string
encrypted_data	string	And	Using AESCBCPKCS7PADDING
iv	string	And	IV for decryption
sign	string	And	1Signature of field 5

encrypted_Data decryption data

Parameter Name	type	Required	Remarks
openid	string	And	User id

Parameter Name	type	Required	Remarks
Errcode	int	And	0 for success
errmsg	string	N	Error message
nuncio_st	string	And	Unaltered bring back
encrypted_data	string	And	Using AESCBCPKCS7PADDING
iv	string	And	IV for decryption

encrypted_Data decryption data

Parameter Name	type	Required	Remarks
cardid	string	And	User Card ID

Request:

{"appid":"test","mch_id":"123456","nonce_str":"abcdefg","encrypted_data":"jfiwajeofjiefef","iv":"afweifwefe"}

encrypted_The data is decrypted as:

{“openid”:”1234”}

Return:

{"errcode":0,"nonce_str":"abcdefg","encrypted_data":"jfiwajeofjiefef","iv":"afweifwefe"}

encrypted_Data after decryption:

{“card_id”:”xxafdafd”}