der

来源： https://stackoverflow.com/questions/49932334/how-read-a-pkcs8-encrypted-private-key-which-is-also-encoded-in-der-with-bouncyc

问题 I read the .der file as follows. byte[] byteKey = File.ReadAllBytes(openFileDialog1.FileName); X509Certificate2 cert = new X509Certificate2(byteKey); but it doesn't have private key. It has only public key. cert.HasPrivateKey return false. When I search it, I found that '.der file doesn't have private Key, private Key is in .key file'. I use Notepad ++ to open a .key file in the same path as the .der file, the broken text will be printed. first question, How to read private key from .key file

问题 I read the .der file as follows. byte[] byteKey = File.ReadAllBytes(openFileDialog1.FileName); X509Certificate2 cert = new X509Certificate2(byteKey); but it doesn't have private key. It has only public key. cert.HasPrivateKey return false. When I search it, I found that '.der file doesn't have private Key, private Key is in .key file'. I use Notepad ++ to open a .key file in the same path as the .der file, the broken text will be printed. first question, How to read private key from .key file

问题 I have a signature created this way: size_t siglenth = _signer.MaxSignatureLength(); QByteArray signature(siglenth, 0x00); signature.reserve(siglenth); siglenth = _signer.SignMessage(_prng, (const CryptoPP::byte*) (message.constData()), message.length(), (CryptoPP::byte*) signature.data()); My signature have a size of 64 and contains: ECCD530E5F232B7C566CA5322F990B3D55ED91156DF3845C4B9105BFE57606DDD68F332A0A5BF7CAB673E4970D10109B72F114571E7474F93ED7C89CD1B89AD4 From what I have read in dsa.h

问题 I have a signature created this way: size_t siglenth = _signer.MaxSignatureLength(); QByteArray signature(siglenth, 0x00); signature.reserve(siglenth); siglenth = _signer.SignMessage(_prng, (const CryptoPP::byte*) (message.constData()), message.length(), (CryptoPP::byte*) signature.data()); My signature have a size of 64 and contains: ECCD530E5F232B7C566CA5322F990B3D55ED91156DF3845C4B9105BFE57606DDD68F332A0A5BF7CAB673E4970D10109B72F114571E7474F93ED7C89CD1B89AD4 From what I have read in dsa.h

问题 I have a signature created this way: size_t siglenth = _signer.MaxSignatureLength(); QByteArray signature(siglenth, 0x00); signature.reserve(siglenth); siglenth = _signer.SignMessage(_prng, (const CryptoPP::byte*) (message.constData()), message.length(), (CryptoPP::byte*) signature.data()); My signature have a size of 64 and contains: ECCD530E5F232B7C566CA5322F990B3D55ED91156DF3845C4B9105BFE57606DDD68F332A0A5BF7CAB673E4970D10109B72F114571E7474F93ED7C89CD1B89AD4 From what I have read in dsa.h

问题 I have to verify a certificate. I'm not an expert of cryptography, so probably I did something (or everything :) ) wrong. When the code reach the last step ( boolean b = sig.verify(CertSign); ), it fires an exception: java.security.SignatureException: error decoding signature bytes . Could someone help me to figure out what I'm doing wrong? The following is a test code that shows the problem: private void test() { byte [] CertBody = new byte[]{(byte)0x7F,(byte)0x4E,(byte)0x81,(byte)0x82,

问题 I have to verify a certificate. I'm not an expert of cryptography, so probably I did something (or everything :) ) wrong. When the code reach the last step ( boolean b = sig.verify(CertSign); ), it fires an exception: java.security.SignatureException: error decoding signature bytes . Could someone help me to figure out what I'm doing wrong? The following is a test code that shows the problem: private void test() { byte [] CertBody = new byte[]{(byte)0x7F,(byte)0x4E,(byte)0x81,(byte)0x82,

问题 This question already has answers here : How to Generate rsa keys using specific input numbers in openssl? (2 answers) Closed 3 years ago . I have calculated n, e, d, p, q values of an RSA key. Now, how can I generate a private key file (pem or der) with openssl command line tools? I was thinking about openssl asn1parse -genconf asn1.cnf -noout -out asn1.der but I cannot understand how to build the conf file. 回答1: The OpenSSL manpage for asn_generate_nconf comes with an example cnf for

问题 How can I convert a DER Format certificate x509 into a human readable format in JavaScript? 回答1: Javascript does not provide a method to parse certificate fields. You need to use a library like forge. I think you need something like this var certAsn1 = forge.asn1.fromDer(certDer) var cert = forge.pki.certificateFromAsn1(certAsn1); console.log(cert.serialNumber); 来源： https://stackoverflow.com/questions/44586556/how-do-i-convert-der-format-certificate-x509-into-human-readable-format