我的Java应用程序正在接收JWT。我有PEM格式的公钥:
-----BEGIN PUBLIC KEY-----
MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAixn0CGu8/M4txn4pdp8K
m8RQfVa+cHX25/a5sPmzP49u7YlQsRvtOexzgdwDcfUJm3hHMZcbZBtrHKsS8q4Q
QtGQioyVml8EaLuFNFYisaIEldVyRbXFG54FNp03vSU9ImS/cOiM9swo+1w5JgWO
F9efy7JO40LA9E7lv64COUYjFhrn+HRZuKoblL19+Sj49FyXexAUS29UM9PfIdY6
ar1FA8cxzPqW7EkXZ0Mua3IzNnYcjMvUL9TJwoLAAz9S1Tv4Is5jupy9UXkuJ4r8
Jx9DqI3Q3ur0VekYSd5tnTI4K+no9ABCFVv7+6Q45Ec2eB0xMwlqI+phcGhGMVCX
1QIDAQAB
-----END PUBLIC KEY-----
我知道我可以使用JwtConsumer
来验证和解码JWT:
JwtConsumer jwtConsumer = new JwtConsumerBuilder()
.setRequireExpirationTime()
.setVerificationKey(publicKey) // what do I pass here?
.build();
但是,如何将PEM文件转换为可以理解的格式.setVerificationKey()
?
在v0.5.0中,有一些实用程序支持处理PEM编码的公钥RsaKeyUtil.fromPemEncoded(String pem)
,这可能会为您简化一些事情。您还可以直接从JwtClaims
对象获取索赔值,这也可能会简化。这是您的示例,并做了一些细微的修改:
String jwt = "eyJhbGciOiJSUzI1NiJ9.eyJ1c2VybmFtZSI6Ik1DaGFtYmU0IiwiZXhwIjoxNDU2OTEwODgzLCJzY29wZSI6WyJvcGVuaWQiLCJwMnAiLCJociIsImRhcyIsIm1lIl0sImNsaWVudF9pZCI6Im1vYmlsZSIsImp0aSI6ImNZcHBMYXltVzlmNXFBZk4ifQ.QqZI9vV8IznTjN-GtUSCri9-6HH6Yl1Oae6K8-d2yjQ4fysF5d3wStdL2kMazl7xeqbtSIsw-F5Aol9eHdGAu54b9IyBEM_QIasy0lnT8xFk0Zi36NJ-7yhl_89f6SB6TGimM59xUvzXxuAw3FzWM6TbiptInrCL2TXkhS69Gng-ANPeiSITUX5A1TDInssds6ZoSb7IOUMtxPGfrbO9sBjx8aJlIu9igkqk4OX5xBmxLp3icoo98I5v9Wt_Huu7eWKBfOskMSEav4X_m5_phbAZJ_F8nWRmcxk6O7hCQdawzegnhMxP2IPIhwlWRNX_8WxkNErq2fJgdazDf8pS_Q";
// read public key from a file or config or something
String publicKeyPEM =
"-----BEGIN PUBLIC KEY-----\n" +
"MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAixn0CGu8/M4txn4pdp8K\n" +
"m8RQfVa+cHX25/a5sPmzP49u7YlQsRvtOexzgdwDcfUJm3hHMZcbZBtrHKsS8q4Q\n" +
"QtGQioyVml8EaLuFNFYisaIEldVyRbXFG54FNp03vSU9ImS/cOiM9swo+1w5JgWO\n" +
"F9efy7JO40LA9E7lv64COUYjFhrn+HRZuKoblL19+Sj49FyXexAUS29UM9PfIdY6\n" +
"ar1FA8cxzPqW7EkXZ0Mua3IzNnYcjMvUL9TJwoLAAz9S1Tv4Is5jupy9UXkuJ4r8\n" +
"Jx9DqI3Q3ur0VekYSd5tnTI4K+no9ABCFVv7+6Q45Ec2eB0xMwlqI+phcGhGMVCX\n" +
"1QIDAQAB\n" +
"-----END PUBLIC KEY-----";
RsaKeyUtil rsaKeyUtil = new RsaKeyUtil();
PublicKey publicKey = rsaKeyUtil.fromPemEncoded(publicKeyPEM);
// create a JWT consumer
JwtConsumer jwtConsumer = new JwtConsumerBuilder()
.setRequireExpirationTime()
.setVerificationKey(publicKey)
.build();
// validate and decode the jwt
JwtClaims jwtDecoded = jwtConsumer.processToClaims(jwt);
String username = jwtDecoded.getStringClaimValue("username"); // "MChambe4"
// ensure the required scope is claimed
String requiredScope = "das";
List<String> scopes = jwtDecoded.getStringListClaimValue("scope");
if (!scopes.stream().anyMatch(scope -> scope.equals(requiredScope))) {
throw new Exception("Required scope is not claimed: " + requiredScope);
}
}
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