in oss-20190517/src/main/java/com/aliyun/sdk/service/oss20190517/encryption/crypto/CryptoRuntime.java [20:27]
public static void enableBouncyCastle() {
if (!isBouncyCastleAvailable()) {
addBouncyCastleProvider();
if (!isBouncyCastleAvailable()) {
throw new UnsupportedOperationException("The Bouncy castle library is not found.");
}
}
}