JAVA RSA

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RSA 加载公钥时：[color=red]Caused by: java.security.InvalidKeyException: IOException: DerInputStream.getLength(): lengthTag=127, too big.[/color]
加载公钥代码段：

public static String getPubKeyByCer(String cerPath) { String pubKey = ""; try { CertificateFactory certificateFactory = CertificateFactory.getInstance("X.509"); FileInputStream in = new FileInputStream(cerPath); Certificate certificate = certificateFactory.generateCertificate(in); in.close(); PublicKey publicKey = certificate.getPublicKey(); pubKey = Base64Utils.encode(publicKey.getEncoded()); } catch (CertificateException e) { e.printStackTrace(); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (Exception e) {e.printStackTrace();} return pubKey; }

解决办法：[color=red]加载错误-->去掉文件中的首尾行BEGIN,END[/color]
加载方法改为：

public static String loadPublicKeyByFile(String path) throws Exception { try { BufferedReader br = new BufferedReader(new FileReader(path)); String readLine = null; StringBuilder sb = new StringBuilder(); while ((readLine = br.readLine()) != null) { sb.append(readLine); } br.close(); return sb.toString(); } catch (IOException e) { throw new Exception("公钥数据流读取错误"); } catch (NullPointerException e) { throw new Exception("公钥输入流为空"); } }

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