RS256 failed when encoding

[sambo-nbc]

New Issue Checklist

• I have read and understood the CONTRIBUTING guide
• I have read the Documentation
• I have searched for a similar issue in the project and found none

Issue Info

Info	Value
Platform Name	e.g. ios
Platform Version	e.g. 12.0.1
CocoaLumberjack Version	e.g. 2.3.0
Integration Method	cocoapods
Xcode Version	e.g. Xcode 13.1
Repro rate	e.g. all the time (100%) / sometimes x% / only once
Demo project link

Issue Description and Steps

Encode with RS256 using string data of a private key, but I got error
Error Domain=NSOSStatusErrorDomain Code=-50 "RSA private key creation from data failed" UserInfo={numberOfErrorsDeep=0, NSDescription=RSA private key creation from data failed}

Here is code sample:

    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"example" ofType:@"key"];
    NSString *key = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];

    NSDictionary *payload = @{@"payload" : @"hidden_information"};

    
    id <JWTAlgorithmDataHolderProtocol> signDataHolder = [JWTAlgorithmRSFamilyDataHolder new]
            .keyExtractorType([JWTCryptoKeyExtractor privateKeyWithPEMBase64].type)
            .privateKeyCertificatePassphrase(nil)
            .algorithmName(JWTAlgorithmNameRS256).secret(key);

    JWTCodingResultType *result = [JWTEncodingBuilder encodePayload:payload]
        .addHolder(signDataHolder)
        .result;

    NSString *token = result.successResult.encoded;
    NSError *error = result.errorResult.error;

    NSLog(@"%@", token);
    NSLog(@"%@", error);```

Private key: 

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

Could anyone here help me regard this issue, please? 🙏 

[lolgear]

Are you sure that this is a valid RSA key?

OpenSSL can't extract public key from it.

openssl rsa -in private.pem -pubout > public.pem

[sambo-nbc]

@lolgear
I generate RSA keypair with command below:
openssl req -newkey rsa:2048 -nodes -keyout private.key -x509 -days 365 -out public.crt

[lolgear]

@sambo-nbc
Try to regenerate key and extract its public part.

openssl req -newkey rsa:2048 -nodes -keyout private.key -x509 -days 365 -out public.crt
openssl rsa -in private.pem -pubout > public.pem

It should work.