des3_ede_expand_key
err = des3_ede_expand_key(&ctx->enc, key, keylen);
err = des3_ede_expand_key(dctx, key, keylen);
int des3_ede_expand_key(struct des3_ede_ctx *ctx, const u8 *key,
EXPORT_SYMBOL_GPL(des3_ede_expand_key);