qcrypto_cipher_decrypt()

Decrypt a cipher

Synopsis:

#include <qcrypto/qcrypto.h>

int qcrypto_cipher_decrypt(qcrypto_ctx_t *ctx,
                           const uint8_t *in,
                           size_t insize,
                           uint8_t *out,
                           size_t *outsize)

Arguments:

ctx: The algorithm context object.
in: The input data.
insize: The input data size.
out: The output data.
outsize: The combined size of the output data and the decrypted data.

Library:

libqcrypto

Description:

This function decrypts ciphertext data using the specified symmetric key. For stream ciphers (block size == 1), the out buffer should be at least as large as the in buffer. If the input is a multiple of the block size (block size > 1), the out buffer should be at least as large as the in buffer; otherwise, the out buffer needs to be at least one block larger.

Returns:

QCRYPTO_R_EOK if successful or qcrypto_errno if an error occurred.