package com.dji.sample.territory.utils;
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import org.bouncycastle.crypto.digests.SM3Digest;
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import org.bouncycastle.crypto.params.ECPrivateKeyParameters;
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import org.bouncycastle.crypto.signers.SM2Signer;
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import org.bouncycastle.jce.provider.BouncyCastleProvider;
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import org.bouncycastle.util.encoders.Hex;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.math.BigInteger;
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import java.security.Security;
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public class SM3HashExample {
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public static StringBuilder HaXi(File file) {
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// 向Java安全提供者列表中添加Bouncy Castle提供者
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Security.addProvider(new BouncyCastleProvider());
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// 图片文件路径
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try (FileInputStream fis = new FileInputStream(file)) {
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SM3Digest digest = new SM3Digest();
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byte[] buffer = new byte[1024];
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int bytesRead;
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// 读取文件并更新哈希值
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while ((bytesRead = fis.read(buffer)) != -1) {
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digest.update(buffer, 0, bytesRead);
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}
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// 计算哈希值
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byte[] hash = new byte[digest.getDigestSize()];
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digest.doFinal(hash, 0);
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// 将哈希值转换为十六进制字符串
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StringBuilder hexString = new StringBuilder();
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for (byte b : hash) {
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String hex = Integer.toHexString(0xff & b).toUpperCase();
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if (hex.length() == 1) hexString.append('0');
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hexString.append(hex);
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}
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// 输出哈希值
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return (hexString);
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} catch (IOException e) {
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e.printStackTrace();
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}
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return null;
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}
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public static StringBuilder str(String s) {
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// 向Java安全提供者列表中添加Bouncy Castle提供者
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Security.addProvider(new BouncyCastleProvider());
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// 要进行哈希计算的字符串
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String input = s;
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// 计算SM3哈希值
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byte[] hash = calculateSM3Hash(input);
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// 将哈希值转换为十六进制字符串
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StringBuilder hexString = new StringBuilder();
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for (byte b : hash) {
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String hex = Integer.toHexString(0xff & b).toUpperCase();
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if (hex.length() == 1) hexString.append('0');
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hexString.append(hex);
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}
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return hexString;
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}
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public static byte[] calculateSM3Hash(String input) {
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SM3Digest digest = new SM3Digest();
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byte[] inputBytes = input.getBytes();
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digest.update(inputBytes, 0, inputBytes.length);
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byte[] hash = new byte[digest.getDigestSize()];
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digest.doFinal(hash, 0);
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return hash;
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}
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}
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