![]() To Transform a PEM file into a PKCS12 file:.Openssl pkcs12 -in mypfxfile.pfx -out mypemfile.pem To Transform a PFX file into a PEM file:.Use 'openssl' as in the OpenSSL Web site listed in the related link below: When you have a PKCS12 keystore you can use it as is or you can import the certificates it contains into a JKS (Java KeyStore) file so you can use it in Rational Application Developer or WebSphere Studio Application Developer. Both can be contained in one file or two distinct files. PEM and PFX files usually carry the private and public key of a certificate. The information that follows explains how to transform your PFX or PEM keystore into a PKCS12 keystore. A PFX keystore can contain private keys or public keys. PFX is a keystore format used by some applications. A PEM encoded file contains a private key or a certificate. if ( $Install -and $StoreLocation -eq "LocalMachine" ) $Prime1 = _normalizeAsnInteger $asn. ToString ( ) KeyNumber = $KeySpec # 1 - AT_EXCHANGE, 2 - AT_SIGNATURE } # if we want to install the certificate to local machine store specify appropriate flag # there is no need to specify additional flags when installing to current user store. $cspParams = New-Object -Property ProviderName = "Microsoft Enhanced RSA and AES Cryptographic Provider" Ke圜ontainerName = "pspki-" + :: NewGuid ( ). The key association code looks like this: Name format doesn’t really matter, so to maintains a name uniqueness, you are allowed to use GUIDs. This is just a container name within CSP, so CryptoAPI can locate the right key among thousands which can be stored within CSP. We can use any, but I would suggest to use Microsoft Enhanced RSA and AES Cryptographic Provider as it supports a wide range of keys and key sizes. What information we need to provide in the CspParameters object? At a minimum, we must specify: So, we need to prepare crypto provider information and use this info during key import. So, if we look at constructors, we can find a suitable one: RSACryptoServiceProvider(CspParameters). It accepts binary PRIVATEKEYBLOB as a parameter! However, the key must be stored in some crypto provider and must have a container name within provider. RSACryptoServiceProvider class contains a ImportCspBlob(Byte) method which does the trick. As per documentation, the property accepts either an RSACryptoServiceProvider or a DSACryptoServiceProvider objects. Recently I figured that X509Certificate2.PrivateKey property has setter accessor. I didn’t know how to do the last step natively by using PowerShell/.NET and used certutil –mergePFX command to associate PRIVATEKYEBLOB with public certificate. In the first version of such converter I successfully done first three steps. Associate PRIVATEKYEBLOB with an X509Certificate2 instance.Convert PKCS#1/PKCS#9 private key to CryptoAPI PRIVATEKEYBLOB.Read the certificate information from PEM file and instantiate a X509Certificate2 object.Just to recall what we generally do when converting PEM to X509Certificate2/PFX: In this post I want to show some code that eliminates certutil from the script. I received several feedback comments about avoiding certutil in favor of native PowerShell/.NET managed code. ![]() The script involves some non-PowerShell commands (certutil) which associates private key with a certificate instance. Some time ago I wrote a script that converts PEM file to CryptoAPI compatible format: How to convert PEM file to a CryptoAPI compatible format. Update : fixed number conversion in "_composePRIVATEKEYBLOB" function
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