kcapi_aead_getdata_output - Man Page
get the pointers into output buffer
Synopsis
void kcapi_aead_getdata_output(struct kcapi_handle * handle, uint8_t * encdata, size_t encdatalen, int enc, uint8_t ** aad, size_t * aadlen, uint8_t ** data, size_t * datalen, uint8_t ** tag, size_t * taglen);
Arguments
handle
[in] cipher handle
encdata
[in] data buffer returned by the encryption operation
encdatalen
[in] size of the encryption data buffer
enc
[in] does output buffer hold encryption or decryption result?
aad
[out] AD buffer pointer; when set to NULL, no data pointer is returned; returned pointer may also be NULL
aadlen
[out] length of AD; when aad was set to NULL, no information is returned
data
[out] pointer to output buffer from AEAD encryption operation when set to NULL, no data pointer is returned
datalen
[out] length of data buffer; when data was set to NULL, no information is returned
tag
[out] tag buffer pointer; when set to NULL, no data pointer is returned; returned pointer may also be NULL
taglen
[out] length of tag; when tag was set to NULL, no information is returned
Description
This function is a service function to the consumer to locate the right ciphertext buffer offset holding the authentication tag. In addition, it provides the consumer with the length of the tag and the length of the ciphertext.
Author
Stephan Mueller <smueller@chronox.de>
Author.