How to Encrypt with no Padding (encrypted output size equals input size)

Block encryption algorithms, such as AES, will produce output that is a multiple of the algorithm’s block size. For AES, the output is a multiple of 16 bytes. However, this is for the typically used cipher modes “CBC” (Cipher Block Chaining) and “ECB” (Electronic Cookbook). There are other cipher modes …

Understanding EncryptStringENC and DecryptStringENC in Python and C/C++

Chilkat provides API’s that are identical across a variety of different programming languages. One difficulty in doing this is in handling strings. Different programming languages pass strings in different ways. In some programming languages, such as Python or C/C++, a “string” is simply a sequence of bytes terminated by a …

Posts about Matching Encryption Output for Different Systems

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Format of AES, Blowfish, Twofish, 3DES, etc. Symmetric Encrypted Data?

Question: I know it isn’t listed in the documentation, but is there any method to test whether a file has been previously encrypted or not?  I would like to perform decryption on a file, but only if it is already encrypted. Answer: A symmetric encryption algorithm is simply a transformation …

Matching MySQL’s AES_ENCRYPT Functions

The following example programs demonstrate how to match MySQL’s AES_ENCRYPT function in different programming languages: ASP: Match MySQL AES_ENCRYPT Function SQL Server: Match MySQL AES_ENCRYPT Function C#: Match MySQL AES_ENCRYPT Function C++: Match MySQL AES_ENCRYPT Function MFC: Match MySQL AES_ENCRYPT Function C: Match MySQL AES_ENCRYPT Function Delphi: Match MySQL AES_ENCRYPT …