pem | 易学教程

Convert RSA pem key String to der byte[]

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问题 I'm trying to convert an RSA pem key (contained in a String) to a byte[], like this method does when given a .pem file FileInputStream: http://jets3t.s3.amazonaws.com/api/org/jets3t/service/security/EncryptionUtil.html#convertRsaPemToDer(java.io.InputStream) I've tried this: String pemKey = "-----BEGIN RSA PRIVATE KEY-----\r\n" + "{base64 encoded key part omitted}\r\n" + "{base64 encoded key part omitted}\r\n" + "{base64 encoded key part omitted}\r\n" + "-----END RSA PRIVATE KEY-----"; String

SSL基础：10:证书格式介绍

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使用OpenSSL提供的命令可以进行证书管理，而证书的格式也有很多，这篇文章主要整理一下证书格式相关的基础内容。格式：PKCS 7 概要介绍：PKCS 7的格式被Windows用来进行证书交换，在RFC 2315中有更加详细的定义。可能的后缀：.p7b .keystore 格式：PKCS10格式概要介绍：PKCS 10格式的文件在实际中最多的就是CSR文件，CSR是Certificate Signing Request（证书签名请求）的缩写。证书申请者需要将CSR文件提交给证书颁发机构，然后有证书颁发机构使用其根证书私钥进行签名生成颁发给用户的证书文件，文件中一般包含Subject、Issue、公钥等相关信息。详细的定义可参考RFC 2986。文件可能的后缀： .csr 格式：PKCS 12格式概要介绍：此种格式的文件包含了私钥和公钥对的内容，也称为PFX文件，和PEM格式的文件不同之处在于此种文件格式是加密过的，其中PKCS是 Public-Key Cryptography Standards 的缩写。文件可能的后缀：.pkcs12 .pfx .p12 注意事项：openssl提供pkcs12子命令将此类型的文件转化为PEM格式的文件。格式：PEM格式概要介绍：PEM是Privacy Enhance Mail 的缩写，PEM文件包含了公钥、CA证书文件

Converting a PEM private key file to a JAVA PrivateKey Object

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问题 I know that there are several other questions about that topic, but none of them have helped me out. I tried the BouncyCastle lib as well. Could someone please help me here? The PEM file looks like: -----BEGIN RSA PRIVATE KEY----- MIIEpAIBAAKCAQEAq2eYtnTsEc/qyqS ... ... zY3WG++SA+amcXiO721hJWNC+uTbZ1bzQ== -----END RSA PRIVATE KEY----- I'm using this method public static PrivateKey getPemPrivateKey(String filename) throws IOException, NoSuchAlgorithmException, InvalidKeySpecException { File f

extract signed data from pkcs7 in python

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问题 i have a usb cryptotoken and able to sign data and pack it in pkcs file. then i can extract certificate and data from that file using openssl as follows: openssl cms -verify -in signature.p7s -inform DER -noverify -outform DER -signer cert.pem -out textdata so my question is how to do the same using python (pyopenssl)? i've tried to do as described here, but there is different case - i have attached signature and do not have separate signature and certificate file - i have ASN.1 encoded file,

Does correct freeing of X509 structures differ between chain and main certificate adding?

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问题 I need to add PEM type certificates from memory, which means I can't use the built in read-from-file helpers. My problem is that there's no documentation on how to free up memory afterwards. Now my best guess is as follows: SSL_CTX_use_certificate(): //X509 structure SHOULD be freed using X509_free(), as in SSL_CTX_use_certificate_file() SSL_CTX_use_PrivateKey() // EVP_KEY structure SHOULD be freed using EVP_KEY_free(), as in SSL_CTX_use_PrivateKey_file() SSL_CTX_add_extra_chain_cert() //

ssl with self signed certificate using python

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问题 I am trying to build a simple server in python using my self signed certificate. I created .cer, .pfx, .pvk files using makecert. context = ssl.create_default_context(ssl.Purpose.CLIENT_AUTH) context.load_cert_chain(certfile="ServerSSL.cer") Traceback (most recent call last): File "ssl_server.py", line 4, in <module> context.load_cert_chain(certfile="ServerSSL.cer") ssl.SSLError: [SSL] PEM lib (_ssl.c:2580) What I did wrong? I also tried to convert my cer file to pem by changing the suffix

Opening and checking a Pem file in SWI-Prolog

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问题 How do I open a Pem file to check a) That the 'Not before' and 'Not after' dates are okay and b) That there is a chain of certs in the pem file to a route certificate authority? I have tried: :-use_module(library(http/http_client)). url('http://fm4dd.com/openssl/source/PEM/certs/512b-rsa-example-cert.pem'). url_data(Url,D):- http_get(Url,D,[to(string)]). url_data1(Url,Certificate):- http_get(Url,D,[to(stream(Stream))]), load_certificate(Stream, Certificate), close(Stream). url_data/1 works in

UnsupportedAlgorithm: This backend does not support this key serialization. - Python cryptography load_pem_private_key

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问题 I am trying to generate signed urls for AWS Cloudfront based on the example here. On the line private_key = serialization.load_pem_private_key( key_file.read(), password=None, backend=default_backend() ) I get the error UnsupportedAlgorithm: This backend does not support this key serialization. The full trace is as below: File "command_util.py", line 98, in rsa_signer backend=default_backend() File "runtime/cryptography/hazmat/primitives/serialization.py", line 20, in load_pem_private_key

How to import PKCS1 keys from a PEM file containing Private / Public keys in .Net Core

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问题 I am trying to load the Private and Public keys from a PEM file using .Net Core. My code looks like this: var localPath = Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location); var path = Path.Combine(localPath, this._configManager.JwtPem); var rsaCryptoServiceProvider = new RSACryptoServiceProvider(); var linesList = File.ReadAllLines(path).ToList(); var line = string.Concat(linesList.GetRange(1, linesList.Count - 2)); rsaCryptoServiceProvider.ImportCspBlob

Extract raw certificate from PKCS#7 file in JAVA

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问题 I would like to achieve the same what this openssl command performs, but programmatically in Java: openssl pkcs7 -in toBeExported.p7c -inform DER -out certificate.pem -print_certs which means that I have a public key certificate (PKCS #7 Certificate) in DER format and I want to extract the raw certificate contained there to a Base64 file. Is there a way to do this? 回答1: Something like FileInputStream is = new FileInputStream( "cert.pkcs7" ); CertificateFactory cf = CertificateFactory