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Creating a Context and Setting a Cipher Key

When creating a cipher context, you need to provide the memory and related management functions to fill in setup.ops. You can provide third-party memory or use the BLK memory pool interface provided by the WD to create the cipher context. The following describes how to create a cipher context based on test_mempool applied by wd_queue.

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struct wcrypto_cipher_ctx_setup setup;
void *ctx = NULL,*pool = NULL;
int block_size = TEST_BLOCK_SIZE;
int block_num = TEST_BLOCK_NUM;

pool = test_mempool_create(&q, block_size, block_num);
memset((void *)&setup, 0, sizeof(setup));
setup.ops.alloc = test_alloc_buf;
setup.ops.free = test_free_buf;
setup.ops.dma_map = test_ dma_map;
setup.ops.dma_unmap = test_ dma_unmap;
setup.ops.usr = pool;
setup.alg = WCRYPTO_CIPHER_SM4;
setup.mode = WCRYPTO_CIPHER_CBC;
ctx = wcrypto_create_cipher_ctx(&q, &setup);
wcrypto_set_cipher_key(ctx, key, key_len);