pem | 易学教程

Openssl convert .PEM containing only RSA Private Key to .PKCS12

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问题 Currently I have a .PEM file containing only a private key. I need to convert this file into a .PKCS12 file. Currently I'm trying to use openssl to achieve this and I'm running into some problems. The .PEM file I'm using is of the form: -----BEGIN RSA PRIVATE KEY----- Some key -----END RSA PRIVATE KEY----- I use the following Openssl command to attempt to convert this .PEM file into a .PKCS12: openssl pkcs12 -export -inkey file.pem -out file.p12 The console then hangs with the message:

Write x509 certificate into PEM formatted string in java?

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问题 Is there some high level way to write an X509Certificate into a PEM formatted string? Currently I'm doing x509cert.encode() to write it into a DER formatted string, then base 64 encoding it and appending the header and footer to create a PEM string, but it seems bad. Especially since I have to throw in line breaks too. 回答1: This is not bad. Java doesn't provide any functions to write PEM files. What you are doing is the correct way. Even KeyTool does the same thing, BASE64Encoder encoder =

使用VC和DirectShow从摄像头中读取图像（一）

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　　在图像处理时经常会用到从摄像头读取图像。 OPENCV 有提供的方法来实现，非常简单，不用多说。而使用 VC++ 则没有那么容易，下面介绍使用 CImage 和 DirectShow 读取摄像头图像，并显示的对话框中。我用的开发工具是 VS2010 。源代码下载，使用VS2010编译通过。 http://download.csdn.net/detail/sdlypyzq/4087013 一、创建一个 MFC 对话框程序，工程起名为 CameraVCTest 。二、删除无用的控件和按钮。添加一个图片控件， ID 为 IDC_PICTURE ，并为其添加 CStatic 类型变量 m_picture 。添加四个按钮，名称分别为预览，拍照，保存，关闭。 ID 分别为 IDC_VIEW,IDC_TAKEPHOTO,IDC_SAVE,IDC_CLOSE 。分别为其添加变量 m_view,m_takePhoto,m_save,m_close 。双击四个按钮，生成四个响应函数。三、将 DirectShow 文件夹和 CameraDS 类的头文件和源文件拷贝到项目源文件夹下。并在项目属性 VC++ Directories 添加 include Directories ，“ .\DirectShow ”。在 Solution Exlporer 添加上 CameraDS

How to write private key to password protected DER format in Java?

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问题 I have an RSA key pair that I generated in Java and I need to programmatically write the private key to the same format that openssl does when I run this command (and enter the appropriate data for the prompts, namely a passphrase to protect the private key): openssl req -out request.csr -newkey rsa:2048 -keyout privkeyfile The Java code to generate the key pair is pretty standard: KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA"); keyGen.initialize(2048); KeyPair keyPair = keyGen

How to use tee command inside child process (exec)?

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问题 I'm trying to use the tee command inside the exec, but I can't get any progress. My command converts a PFX to a PEM certificate using openssl like that: openssl pkcs12 -in MYCERT.pfx -nodes -passin pass:123456 | tee >(openssl pkey -outform PEM) >(openssl x509 -outform PEM) Terminal output: # first command output (PFX to PEM) Bag Attributes localKeyID: 1A 0F 62 99 24 06 E7 AE D7 0F 11... -----BEGIN CERTIFICATE----- MIIH+zCCBeOgAwIBAgIQXSw4HKLTQrztT3ENqlcWfjANBgkqhkiG9w0BAQsFADB4

From ExpKey + Modkey to PEM

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问题 I have for example EXPKEY : 010001 MODKEY :

OpenSSL, Converting CRT to PEM

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问题 I've been trying to use openssl to convert a .crt certificate to a .pem openssl.exe x509 -in server.crt -out openssl.der -outform DER After using that command, I get unable to load certificate 1760:error:0906D06C:PEM routines:PEM_read_bio:no start line:.\crypto\pem\pem_lib.c:703:Expecting: TRUSTED CERTIFICATE I've tried following https://support.ssl.com/Knowledgebase/Article/View/19/0/der-vs-crt-vs-cer-vs-pem-certificates-and-how-to-convert-them but I'm at a loss and nothing on there is

NPM Install Fails - error:0906D06C:PEM routines:PEM_read_bio:no start line

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问题 I am attempting to install the expo package from npm, but during the install process, I receive an error, error:0906D06C:PEM routines:PEM_read_bio:no start line , multiple times as it tries to fetch .tar.gz files, and then the installation fails. I looked around, but all I have been able to find is examples of that error when people were setting up their own servers and had issues with their certs. But I'm not trying to set up a server, I'm trying to download a package, I don't have any certs

How to get PEM encoded X509 certificate as C++ string using openssl?

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问题 I have a openssl X509 structure with a self signed certificate. I need to get a PEM formatted C++ string from this structure. What are the openssl APIs that I need to use to achieve this? I tried following the example program at https://www.codeblog.org/gonzui/markup/openssl-0.9.8a/demos/x509/mkcert.c. This program shows a way to write the certificate in PEM format to a file. I can read the contents of this file into a C++ string if there is no other way to do it. 回答1: look at the source of

Convert PEM to PKCS7 (Java)

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问题 I have a List of Byte arrays (representing each certificate from a chain), in PEM format, and I would like to know if there's a way to convert these to a unique PKCS7 formatted String, in Java. Thank you in advance. 回答1: This is an example to build a PKCS#7 file using a X509Certificate[] array based on this answer. It does not require the private key //Export a certificate list to PKCS#7 public static byte[] exportCertificatesAsPkcs7(X509Certificate certs[]) throws Exception { List certList =