Apple Pay - 解密付款数据

Question

我试图在Apple Pay授权成功后解密对象的paymentData属性PKPaymentToken.

我试图按照这里的说明进行操作,但我仍然坚持解密步骤的第2步,其中说:

使用publicKeyHash密钥的值来确定Apple使用了哪个商家公钥,然后检索相应的商家公钥证书和私钥.

我怎么做？

请指教.

谢谢!

Answer 1

以下是在Apple开发人员中心下载的Apple Pay证书文件中,如何计算Ruby中的publicKeyHash.

require "base64"
require "digest"
require "openssl"

# set cert_file = path to the downloaded Apple Pay .cer file

cert = OpenSSL::X509::Certificate.new(File.read(cert_file)) 
# strip off the "-----BEGIN PUBLIC KEY-----" line at the start of the string
pem = cert.public_key.to_pem.split("\n").drop(1)
# strip off the "-----END PUBLIC KEY-----" line at the end of the string
pem = pem.take(pem.length - 1)

decoded = Base64.decode64(pem.join)
public_key_hash = Digest::SHA256.base64digest(decoded)