From 4de7066db43c58b4d081e2c34a5111b0aa1dac16 Mon Sep 17 00:00:00 2001
From: rain <167982779@qq.com>
Date: Mon, 05 Aug 2024 16:00:50 +0800
Subject: [PATCH] SM2和SM4方法
---
src/main/java/com/dji/sample/droneairport/utils/SM2/Utils.java | 75 ++++++++++++++++++++++++++++++++++++-
1 files changed, 72 insertions(+), 3 deletions(-)
diff --git a/src/main/java/com/dji/sample/droneairport/utils/SM2/Utils.java b/src/main/java/com/dji/sample/droneairport/utils/SM2/Utils.java
index 3cf6efe..fe47c60 100644
--- a/src/main/java/com/dji/sample/droneairport/utils/SM2/Utils.java
+++ b/src/main/java/com/dji/sample/droneairport/utils/SM2/Utils.java
@@ -1,11 +1,12 @@
package com.dji.sample.droneairport.utils.SM2;
import org.bouncycastle.crypto.InvalidCipherTextException;
+
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.NoSuchAlgorithmException;
+import java.util.Base64;
import java.util.Map;
-
public class Utils {
/**
@@ -17,18 +18,21 @@
/**
* encrypt
+ *
* @param plainText 需加密的明文字符串
* @param publicKey 公钥
*/
public static String encrypt(String plainText, String publicKey) throws IOException, InvalidCipherTextException {
+ publicKey=ensurePrefix(publicKey);
return encrypt(plainText, publicKey, ModeTypeConstant.BASE);
}
/**
* encrypt
+ *
* @param plainText 需加密的明文字符串
* @param publicKey 公钥
- * @param modeType base:标准；bc：BC模式
+ * @param modeType base:标准；bc：BC模式
*/
public static String encrypt(String plainText, String publicKey, String modeType) throws IOException, InvalidCipherTextException {
return SecretCommon.encrypt(plainText, publicKey, ModeTypeConstant.getMode(modeType));
@@ -36,21 +40,86 @@
/**
* decrypt
+ *
* @param cipherText 需加密的字符串
* @param privateKey 私钥
*/
public static String decrypt(String cipherText, String privateKey) throws InvalidCipherTextException, UnsupportedEncodingException {
+ cipherText = ensurePrefix(cipherText);
return decrypt(cipherText, privateKey, ModeTypeConstant.BASE);
}
/**
* decrypt
+ *
* @param cipherText 需加密的字符串
* @param privateKey 私钥
- * @param modeType base:标准；bc：BC模式
+ * @param modeType base:标准；bc：BC模式
*/
public static String decrypt(String cipherText, String privateKey, String modeType) throws InvalidCipherTextException, UnsupportedEncodingException {
return SecretCommon.decrypt(cipherText, privateKey, ModeTypeConstant.getMode(modeType));
}
+ public static String ensurePrefix(String input) {
+ // 检查字符串是否以 "04" 开头
+ if (!input.startsWith("04")) {
+ return "04" + input; // 添加前缀
+ }
+ return input; // 原样返回
+ }
+
+ // 将 Hex 格式的字符串转换为字节数组
+ public static byte[] hexToBytes(String hex) {
+ int length = hex.length();
+ byte[] data = new byte[length / 2];
+ for (int i = 0; i < length; i += 2) {
+ data[i / 2] = (byte) ((Character.digit(hex.charAt(i), 16) << 4)
+ + Character.digit(hex.charAt(i + 1), 16));
+ }
+ return data;
+ }
+
+ // 将 DER 格式的字节数组转换为 Base64 编码的字符串
+ public static String convertDerToBase64(byte[] derKey) {
+ return Base64.getEncoder().encodeToString(derKey);
+ }
+
+ // 将 Base64 编码的字符串转换为 Hex 格式的字符串
+ public static String convertBase64ToHex(String base64Key) throws Exception {
+ // 将 Base64 解码为 DER 编码的字节数组
+ byte[] derBytes = Base64.getDecoder().decode(base64Key);
+
+ // 将 DER 编码的字节数组转换为 Hex 格式的字符串
+ return bytesToHex(derBytes);
+ }
+
+ // 将字节数组转换为 Hex 格式的字符串
+ private static String bytesToHex(byte[] bytes) {
+ StringBuilder hexString = new StringBuilder();
+ for (byte b : bytes) {
+ String hex = Integer.toHexString(0xff & b);
+ if (hex.length() == 1) {
+ hexString.append('0');
+ }
+ hexString.append(hex);
+ }
+ return hexString.toString().toUpperCase(); // Convert to uppercase for consistency
+ }
+ public static String hexToBase64(String hexString) {
+ // 将 Hex 字符串转换为字节数组
+ byte[] bytes = hexStringToByteArray(hexString);
+
+ // 将字节数组转换为 Base64 字符串
+ return Base64.getEncoder().encodeToString(bytes);
+ }
+
+ private static byte[] hexStringToByteArray(String hexString) {
+ int len = hexString.length();
+ byte[] data = new byte[len / 2];
+ for (int i = 0; i < len; i += 2) {
+ data[i / 2] = (byte) ((Character.digit(hexString.charAt(i), 16) << 4)
+ + Character.digit(hexString.charAt(i+1), 16));
+ }
+ return data;
+ }
}
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