| | |
| | | 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 { |
| | | |
| | | /** |
| | |
| | | |
| | | /** |
| | | * 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)); |
| | |
| | | |
| | | /** |
| | | * 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; |
| | | } |
| | | } |