Question

在this RailsCast on PayPal中，它会向您展示如何在将URL参数发送到PayPal之前对其进行加密。

PAYPAL_CERT_PEM = File.read("#{Rails.root}/certs/paypal_cert.pem")
APP_CERT_PEM = File.read("#{Rails.root}/certs/app_cert.pem")
APP_KEY_PEM = File.read("#{Rails.root}/certs/app_key.pem")
def encrypt_for_paypal(values)
    signed = OpenSSL::PKCS7::sign(OpenSSL::X509::Certificate.new(APP_CERT_PEM),        OpenSSL::PKey::RSA.new(APP_KEY_PEM, ''), values.map { |k, v| "#{k}=#{v}" }.join("\n"), [], OpenSSL::PKCS7::BINARY)
    OpenSSL::PKCS7::encrypt([OpenSSL::X509::Certificate.new(PAYPAL_CERT_PEM)], signed.to_der, OpenSSL::Cipher::Cipher::new("DES3"),        OpenSSL::PKCS7::BINARY).to_s.gsub("\n", "")
end

假设我正在为PayPal的服务器编写代码。我该如何解密这个字符串？在我看来，这个代码公钥都签署了字符串（以验证真实性），然后加密字符串（以提供隐私）。代码用于反向，解密和验证真实性是什么？

感谢。

Answer 1

嗨John这里是使用ruby openssl加密/解密的一个例子。注意它使用AES作为密码，因为DES3似乎在我的ruby openssl版本中被删除了。在字符串上调用gsub来替换换行符似乎打破了它，所以我把它留下了注释掉。希望它可以帮助你。

require 'openssl'

PAYPAL_CERT_PEM = File.read("paypal_cert.pem")
@paypal_cert = OpenSSL::X509::Certificate.new(PAYPAL_CERT_PEM)

APP_CERT_PEM = File.read("app_cert.pem")
@app_cert = OpenSSL::X509::Certificate.new(APP_CERT_PEM)

APP_KEY_PEM = File.read("app_key.pem")
@app_key = OpenSSL::PKey::RSA.new(APP_KEY_PEM, '')

PAYPAL_KEY_PEM = File.read("paypal_key.pem")
@paypal_key = OpenSSL::PKey::RSA.new(PAYPAL_KEY_PEM, '')

CERT_STORE = OpenSSL::X509::Store.new
CERT_STORE.add_cert(@app_cert)

data = Hash.new
data['customer_id'] = '123456789'
data['customer_name'] = 'Mr Smith'

def encrypt_for_paypal(values)
data_name_values = values.map { |k, v| "#{k}=#{v}" }

signed_data = OpenSSL::PKCS7::sign(@app_cert, @app_key, data_name_values.join("\n"), [], OpenSSL::PKCS7::BINARY)

cypher = OpenSSL::Cipher::new("AES-128-CFB")

encrypted_data = OpenSSL::PKCS7::encrypt([@paypal_cert], signed_data.to_der, cypher, OpenSSL::PKCS7::BINARY)

encrypted_data.to_s #.gsub("\n", "")
end

def decrypt_by_paypal(encrypted_data)
received_encrypted_data = OpenSSL::PKCS7.new(encrypted_data)

received_signed_data = received_encrypted_data.decrypt(@paypal_key, @paypal_cert)

p7_received_signed_data = OpenSSL::PKCS7.new(received_signed_data)

p7_received_signed_data.verify(nil, CERT_STORE, nil, OpenSSL::PKCS7::NOVERIFY)

p7_received_signed_data.data
end

encrypted_txt = encrypt_for_paypal data
puts decrypt_by_paypal encrypted_txt

在Ruby / Rails中，如何解密由PKCS7加密和签名的字符串

1 个答案: