qcrypto_cipher_decrypt()

QNX SDP8.0QNX OS System Security GuideAPIConfiguration

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.

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