他给了我一个测试公钥
MIGAMA0GCSqGSIb3DQEBAQUAA28AMGwCZQCeh0LCZFTcyDINybUavJb-d0sMTMv5-xGDcGmJq38cwtij3n-bFl_qpX2lgN516bGnqZC0-kt-RkmWitXSNj-1yLu4hg1SNy-HfHuvFWulDLpDgt-JOflfCH9cMUZxbOWhf6IlAgMBAAE 不知道经过了什么，我用 php 怎么都读不了这个公钥
下面是文档里面给的 java demo，一直转不成 php 版本的
package com.xxtx.common.util; import org.apache.commons.codec.binary.Base64; import org.apache.commons.io.IOUtils; import javax.crypto.Cipher; import java.io.ByteArrayOutputStream; import java.security.*; import java.security.interfaces.RSAPrivateKey; import java.security.interfaces.RSAPublicKey; import java.security.spec.InvalidKeySpecException; import java.security.spec.PKCS8EncodedKeySpec; import java.security.spec.X509EncodedKeySpec; import java.util.HashMap; import java.util.Map; public class RSAUtils { public static final String CHARSET = "UTF-8"; public static final String RSA_ALGORITHM = "RSA"; // ALGORITHM ['?lg?r??(?)m] 算法的意思 public static Map<String, String>createKeys(int keySize) { // 为 RSA 算法创建一个 KeyPairGenerator 对象 KeyPairGenerator kpg; try { kpg = KeyPairGenerator.getInstance(RSA_ALGORITHM); } catch (NoSuchAlgorithmException e) { throw new IllegalArgumentException("No such algorithm-->["+ RSA_ALGORITHM + "]"); } // 初始化 KeyPairGenerator 对象,密钥长度 kpg.initialize(keySize); // 生成密匙对 KeyPair keyPair = kpg.generateKeyPair(); // 得到公钥 Key publicKey = keyPair.getPublic(); String publicKeyStr = Base64.encodeBase64URLSafeString(publicKey.getEncoded()); // 得到私钥 Key privateKey = keyPair.getPrivate(); String privateKeyStr = Base64.encodeBase64URLSafeString(privateKey.getEncoded()); // map 装载公钥和私钥 Map<String, String> keyPairMap = new HashMap<String, String>(); keyPairMap.put("publicKey", publicKeyStr); keyPairMap.put("privateKey", privateKeyStr); // 返回 map return keyPairMap; } /** * 得到公钥 * @param publicKey 密钥字符串（经过 base64 编码） * @throws Exception */ public static RSAPublicKey getPublicKey(String publicKey) throws NoSuchAlgorithmException, InvalidKeySpecException { // 通过 X509 编码的 Key 指令获得公钥对象 KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM); X509EncodedKeySpec x509KeySpec = new X509EncodedKeySpec(Base64.decodeBase64(publicKey)); RSAPublicKey key = (RSAPublicKey) keyFactory.generatePublic(x509KeySpec); return key; } /** * 得到私钥 * @param privateKey 密钥字符串（经过 base64 编码） * @throws Exception */ public static RSAPrivateKey getPrivateKey(String privateKey) throws NoSuchAlgorithmException, InvalidKeySpecException { // 通过 PKCS#8 编码的 Key 指令获得私钥对象 KeyFactory keyFactory = KeyFactory.getInstance(RSA_ALGORITHM); PKCS8EncodedKeySpec pkcs8KeySpec = new PKCS8EncodedKeySpec(Base64.decodeBase64(privateKey)); RSAPrivateKey key = (RSAPrivateKey) keyFactory.generatePrivate(pkcs8KeySpec); return key; } /** * 公钥加密 * @param data * @param publicKey * @return */ public static String publicEncrypt(String data, RSAPublicKey publicKey) { try { Cipher cipher = Cipher.getInstance(RSA_ALGORITHM); cipher.init(Cipher.ENCRYPT_MODE, publicKey); return Base64.encodeBase64URLSafeString(rsaSplitCodec(cipher, Cipher.ENCRYPT_MODE, data.getBytes(CHARSET), publicKey.getModulus().bitLength())); } catch (Exception e) { throw new RuntimeException("加密字符串["+ data + "]时遇到异常", e); } } /** * 私钥解密 * @param data * @param privateKey * @return */ public static String privateDecrypt(String data, RSAPrivateKey privateKey) { try { Cipher cipher = Cipher.getInstance(RSA_ALGORITHM); cipher.init(Cipher.DECRYPT_MODE, privateKey); return new String(rsaSplitCodec(cipher, Cipher.DECRYPT_MODE, Base64.decodeBase64(data), privateKey.getModulus().bitLength()), CHARSET); } catch (Exception e) { throw new RuntimeException("解密字符串["+ data + "]时遇到异常", e); } } /** * 私钥加密 * @param data * @param privateKey * @return */ public static String privateEncrypt(String data, RSAPrivateKey privateKey) { try { Cipher cipher = Cipher.getInstance(RSA_ALGORITHM); //每个 Cipher 初始化方法使用一个模式参数 opmod，并用此模式初始化 Cipher 对象。此外还有其他参数，包括密钥 key 、包含密钥的证书 certificate 、算法参数 params 和随机源 random 。 cipher.init(Cipher.ENCRYPT_MODE, privateKey); return Base64.encodeBase64URLSafeString(rsaSplitCodec(cipher, Cipher.ENCRYPT_MODE, data.getBytes(CHARSET), privateKey.getModulus().bitLength())); } catch (Exception e) { throw new RuntimeException("加密字符串["+ data + "]时遇到异常", e); } } /** * 公钥解密 * @param data * @param publicKey * @return */ public static String publicDecrypt(String data, RSAPublicKey publicKey) { try { Cipher cipher = Cipher.getInstance(RSA_ALGORITHM); cipher.init(Cipher.DECRYPT_MODE, publicKey); return new String(rsaSplitCodec(cipher, Cipher.DECRYPT_MODE, Base64.decodeBase64(data), publicKey.getModulus().bitLength()), CHARSET); } catch (Exception e) { throw new RuntimeException("解密字符串["+ data + "]时遇到异常", e); } } //rsa 切割解码 , ENCRYPT_MODE,加密数据 ,DECRYPT_MODE,解密数据 private static byte[] rsaSplitCodec(Cipher cipher, int opmode, byte[] datas, int keySize) { int maxBlock = 0; //最大块 if (opmode == Cipher.DECRYPT_MODE) { maxBock = keySize / 8; } else { maxBlock = keySize / 8 - 11; } ByteArrayOutputStream out = new ByteArrayOutputStream(); int offSet = 0; byte[] buff; int i = 0; try { while (datas.length > offSet) { if (datas.length - offSet > maxBlock) { //可以调用以下的 doFinal （）方法完成加密或解密数据： buff = cipher.doFinal(datas, offSet, maxBlock); } else { buff = cipher.doFinal(datas, offSet, datas.length - offSet); } out.write(buff, 0, buff.length); i++; offSet = i * maxBlock; } } catch (Exception e) { throw new RuntimeException("加解密阀值为["+ maxBlock + "]的数据时发生异常", e); } byte[] resultDatas = out.toByteArray(); IOUtils.closeQuietly(out); return resultDatas; } } 
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