paypal充值加密代码

借助第三方库m2crypto，在linux下安装使用sudo apt-get install m2crypto即可。

实现方法：

from M2Crypto import BIO, SMIME, X509
#from django.conf import settings

#DKY7UM4QRRD5Y
#seller_1301033066_per@163.com
    
def paypal_encrypt(attributes):
    
    plaintext = ''
    
    for key, value in attributes.items():
        plaintext += u'%s=%s\n' % (key, value)
    
    plaintext = plaintext.encode('utf-8')
    
    # Instantiate an SMIME object.
    s = SMIME.SMIME()
    
    # Load signer's key and cert. Sign the buffer.
#    s.load_key_bio(BIO.openfile(settings.MY_KEYPAIR), BIO.openfile(settings.MY_CERT))
    
    s.load_key_bio(BIO.openfile("facebook-ppy-prvkey.pem"), BIO.openfile("facebook-ppy-pubcert.pem"))
    
    p7 = s.sign(BIO.MemoryBuffer(plaintext), flags=SMIME.PKCS7_BINARY)
    
    # Load target cert to encrypt the signed message to.
    x509 = X509.load_cert_bio(BIO.openfile("paypal_cert_pem_mouren.txt"))
    sk = X509.X509_Stack()
    sk.push(x509)
    s.set_x509_stack(sk)
    
    # Set cipher: 3-key triple-DES in CBC mode.
    s.set_cipher(SMIME.Cipher('des_ede3_cbc'))
    
    # Create a temporary buffer.
    tmp = BIO.MemoryBuffer()
    
    # Write the signed message into the temporary buffer.
    p7.write_der(tmp)
    
    # Encrypt the temporary buffer.
    p7 = s.encrypt(tmp, flags=SMIME.PKCS7_BINARY)
    
    # Output p7 in mail-friendly format.
    out = BIO.MemoryBuffer()
    p7.write(out)
    
    return out.read()

def pay(request, invoice_id):
    """This view displays an encrypted PayPal 'buy now' button"""
    
#    invoice = get_object_or_404(Invoice, id = 1)
    
    attributes = {}
    attributes['cmd'] = '_xclick' 
    attributes['business'] = 'xxx.li@xxx.com'
#    attributes['item_name'] = invoice.item_name
    attributes['item_name'] = 'test'
#    attributes['amount'] = invoice.amount
    attributes['amount'] = 5
    attributes['currency_code'] = 'GBP'
    attributes['cert_id'] = 'DKY7UM4QRRD5Y'
    
    encrypted_block = paypal_encrypt(attributes)
    
    return render_to_response('pay.html', {'encrypted_block': encrypted_block})


#<form target="paypal" action="https://www.paypal.com/cgi-bin/webscr" method="post">
#    <input type="hidden" name="cmd" value="_s-xclick" />
#    <input type="hidden" name="encrypted" value="{{ encrypted_block }}" />
#    <input class="button pay" type="submit" name="submit" value="Pay Invoice" />
#</form>

if __name__ == "__main__":
    attributes = {}
    attributes['cmd'] = '_xclick' 
    attributes['business'] = 'seller_1301033066_per@163.com'
    attributes['item_name'] = 'test'
    attributes['amount'] = 10
    attributes['currency_code'] = 'USD'
    attributes['cert_id'] = '494G534LA7XZA'
    
    encrypted_block = paypal_encrypt(attributes)
    print encrypted_block

相关的PIN代码，网上很多，不赘述了。