Multi-buffer - Multi-buffer - 5.3 English - 68552

Initialize multi-buffer cipher operation with key and per-buffer IVs.

This API prepares a multi-buffer cipher session for parallel encryption of multiple independent buffers. It must be called after alcp_cipher_request and before alcp_flush.

Multi-buffer mode processes up to 127 independent plaintext buffers in parallel using AVX-512 instructions. Each buffer uses its own IV for independent encryption streams.

Supported cipher modes: AES-CBC, AES-CFB.

Parameters:

• pCipherHandle – [in] Session handle from alcp_cipher_request

• pKey – [in] Encryption key (NULL to reuse key from request)

• keyLen – [in] Key length in bits (0 if pKey is NULL)

• pIv – [in] Array of pointers to IV buffers, one per buffer

• ivLen – [in] Length of each IV in bytes (e.g., 16 for AES)

• numBuffers – [in] Number of buffers to process (max 127)

Returns:

ALC_ERROR_NONE on success.

Enqueue multiple plaintext buffers for parallel encryption.

Stages a batch of plaintext buffers for parallel SIMD encryption. Each buffer can have a different length (variable-length multi-buffer). Call alcp_dequeue to retrieve the encrypted results.

This API must be called after alcp_multibuffer_init. The buffers are not encrypted immediately — actual processing happens during alcp_dequeue.

Supported cipher modes: AES-CBC, AES-CFB.

Parameters:

• pCipherHandle – [in] Session handle for cipher operation

• pPlainText – [in] Array of pointers to plaintext buffers

• pLengths – [in] Array of per-buffer lengths in bytes

• numBuffers – [in] Number of buffers in the batch (max 127)

Pre:

alcp_multibuffer_init must be called before this API.

Returns:

ALC_ERROR_NONE on success.

Retrieve encrypted ciphertext from multi-buffer operation.

Performs the actual parallel encryption of buffers staged via alcp_flush and writes results to the provided output buffers. Uses the Iterative MinLen algorithm for maximum SIMD parallelism across variable-length buffers.

Each output buffer must be pre-allocated by the caller with at least the corresponding length from pLengths.

Supported cipher modes: AES-CBC, AES-CFB.

Parameters:

• pCipherHandle – [in] Session handle for cipher operation

• pCipherText – [out] Array of pointers to pre-allocated output buffers

• numBuffers – [in] Number of buffers to dequeue

• pLengths – [in] Array of per-buffer lengths in bytes

Pre:

alcp_flush must be called before this API.

Returns:

ALC_ERROR_NONE on success.