1.把pem文件用text打开,把开头和结尾的begin和end内容删去,只留下字符串内容;
2.用流读取文件中的字符串;
3.用以下代码生成公钥和私钥对象;
public static PublicKey string2PublicKey(String pubStr) throws Exception{
byte[] keyBytes = base642Byte(pubStr);
X509EncodedKeySpec keySpec = new X509EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PublicKey publicKey = keyFactory.generatePublic(keySpec);
return publicKey;
}
//将Base64编码后的私钥转换成PrivateKey对象
public static PrivateKey string2PrivateKey(String priStr) throws Exception{
byte[] keyBytes = base642Byte(priStr);
PKCS8EncodedKeySpec keySpec = new PKCS8EncodedKeySpec(keyBytes);
KeyFactory keyFactory = KeyFactory.getInstance("RSA");
PrivateKey privateKey = keyFactory.generatePrivate(keySpec);
return privateKey;
}
备注:
读取私钥前要加上:
java.security.Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
运行服务,不然运行会出现algid parse error, not a sequence错误。
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