QuickCrypt Library

API

CTR Mode API Overview

CTR Mode API assists you in performing encryption/decryption in Counter mode of operation.

To encrypt/decrypt a continuous memory buffer, perform the following:

• Allocate at least CONTEXTSIZE bytes for the context. For example, to perform DES encryption/decryption allocate at least SLC_DES_CONTEXTSIZE bytes for the context.

• Call the Init function of the encryption algorithm you need to use, passing to it the secret key and the cipher direction (SLC_ENCRYPT only). For example, to perform DES encryption/decryption call SL_DES_Init function.

• Call the SL_CTR_Init function to initialize the context with the initialization vector.

• Call the SL_CTR_Process function to encrypt/decrypt the memory buffer.

• Call the SL_CTR_Seek function to encrypt/decrypt the memory buffer.

CTR Mode API Functions   |   Useful Links