使用BouncyCastle生成SM3摘要

String text ="This is a message";

byte[] message = text.getBytes();

byte[] digest;

org.bouncycastle.crypto.Digest md = new org.bouncycastle.crypto.digests.SM3Digest();

md.update(message,0,message.length);

digest = new byte[md.getDigestSize()];

md.doFinal(digest, 0);