des_ctx
struct des_ctx *dctx = crypto_tfm_ctx(tfm);
const struct des_ctx *dctx = crypto_tfm_ctx(tfm);
const struct des_ctx *dctx = crypto_tfm_ctx(tfm);
.cra_ctxsize = sizeof(struct des_ctx),
void des_encrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src);
void des_decrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src);
int des_expand_key(struct des_ctx *ctx, const u8 *key, unsigned int keylen);
struct des_ctx tmp;
int des_expand_key(struct des_ctx *ctx, const u8 *key, unsigned int keylen)
void des_encrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src)
void des_decrypt(const struct des_ctx *ctx, u8 *dst, const u8 *src)