Chilkat HOME Android™ Classic ASP C C++ C# Mono C# .NET Core C# C# UWP/WinRT DataFlex Delphi ActiveX Delphi DLL Visual FoxPro Java Lianja MFC Objective-C Perl PHP ActiveX PHP Extension PowerBuilder PowerShell PureBasic CkPython Chilkat2-Python Ruby SQL Server Swift 2 Swift 3/4 Tcl Unicode C Unicode C++ Visual Basic 6.0 VB.NET VB.NET UWP/WinRT VBScript Xojo Plugin Node.js Excel Go
(Chilkat2-Python) RSAES-OAEP Encrypt String with AES-128 Content Encryption and SHA256
Encrypts a string using RSAES-OAEP with SHA256 and AES-128 content encryption to produce PKCS7 output (base64 encoded).
Note: This example requires Chilkat v184.108.40.206 or greater.
import sys import chilkat2 # This example requires the Chilkat Crypt API to have been previously unlocked. # See Unlock Chilkat Crypt for sample code. # First build a string to be encrypted sb = chilkat2.StringBuilder() i = 1 while i < 25 : sb.AppendInt(i) sb.Append(" the quick brown fox jumped over the lazy dog.\r\n") i = i + 1 print(sb.GetAsString()) # The string to be encrypted looks like this: # 1 the quick brown fox jumped over the lazy dog. # 2 the quick brown fox jumped over the lazy dog. # 3 the quick brown fox jumped over the lazy dog. # 4 the quick brown fox jumped over the lazy dog. # 5 the quick brown fox jumped over the lazy dog. # 6 the quick brown fox jumped over the lazy dog. # ... # Load a digital certificate. # We don't need the private key for encryption. # Only the public key is needed (which is included in a certificate). cert = chilkat2.Cert() success = cert.LoadFromFile("qa_data/rsaes-oaep/cert.pem") if (success != True): print(cert.LastErrorText) sys.exit() crypt = chilkat2.Crypt2() # Tell the crypt object to use the certificate. crypt.SetEncryptCert(cert) # Indicate that we want PKI encryption (i.e. public-key infrastructure) # to produce a CMS message (Cryptographic Message Syntax/PKCS7), # that is be created with RSAES-OAEP padding, SHA256, and AES-128 for the # bulk encryption. crypt.CryptAlgorithm = "pki" crypt.Pkcs7CryptAlg = "aes" crypt.KeyLength = 128 crypt.OaepHash = "sha256" crypt.OaepPadding = True # Also, don't forget to be specific about the character encoding (byte representation) of the # string to be encrypted. crypt.Charset = "utf-8" # Now indicate that the PKCS7 output is to be returned in the base64 encoding. crypt.EncodingMode = "base64" base64Pkcs7 = crypt.EncryptStringENC(sb.GetAsString()) if (crypt.LastMethodSuccess != True): print(crypt.LastErrorText) sys.exit() # Show the output print(base64Pkcs7) # This base64 can be copy-and-pasted into the form at http://lapo.it/asn1js/ # to verify that all the chosen algorithms were indeed used. print("OK.")
© 2000-2020 Chilkat Software, Inc. All Rights Reserved.