To learn more, see our tips on writing great answers. The note on X509KeyStorageFlags.MachineKeySet is important. To my knowledge, though CryptoKit supports the primitive, SecureTransport and the newer Network framework do not, at least the last time I checked. But when you try to access the private key, you'll get the "keyset does not exist" error above. The following code should be used instead. You create them like this: Sometimes it's handy to export the X.509 certificate (which is the public stuff) and the private key into a single file. Any help would be appreciated. Take a moment to peruse the documentation, where you can find other options like adding a digital signature using stream, signing an existing document, adding a timestamp in digital signature and features like protect PDF documents with code examples. I think the intention with EdDSA in OpenSSL is to use PKCS8 / SPKI export functionality, so I would think byte[] would work and the existing members from AsymmetricAlgorithm would work. Not the answer you're looking for? How to get .pem file from .key and .crt files? If specified, the path for the PEM-encoded private key. How to create .pfx file from certificate and private key? If you have any compliments or complaints to We'd need to add plumbing to get the certificate to understand that it has an OpenSSL EdDSA key so that it can pass it back to OpenSSL from SslStream. Include the following namespace in the Program.cs file. What positional accuracy (ie, arc seconds) is necessary to view Saturn, Uranus, beyond? I was wondering if this step was quite necessary. How a top-ranked engineering school reimagined CS curriculum (Ep. On Windows a certificate typically has a .cer extension, and they don't contain a private key. The X509Certificate2 class provides two static methods X509Certificate2.CreateFromPem and X509Certificate2.CreateFromPemFile. on .NET Framework (but not .NET Core) if your private key is RSACryptoServiceProvider or DSACryptoServiceProvider you can use cert.PrivateKey = key, but that has complex side-effects and is discouraged. MSDN Community Support Your email address will not be published. Why did DOS-based Windows require HIMEM.SYS to boot? Code snippets are platform independent. For the most part the answer for this is in Digital signature in c# without using BouncyCastle, but if you can move to .NET Core 3.0 things get a lot easier. This means that you can't restore original PFX from this string. I basically need to export a .pfx certificate as a Base64string, store it in a database and recover it later, converting from Base64string. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. There are two tools that will help you to understand what's going on with certificate issues. Or is it the same for .NET 5+ on Linux? You should never instantiate a X509Certificate2 with the "new" keyword if you can avoid it, it is one of the most dangerous constructors in .NET - X509Certificate2, and if you do, you must be aware of these gotchas. to your account, The x509certificate2 class fails loading a pfx file which contains a ed25519 private key and it's certificate (+ chain), The real failure seems to be here (it's super hard to know 100% since visual studio 2019 does not load the openssl native shims and just optimized assembly), The oid of the private key is: "1.3.101.112" which corresponds to the RFC oid for ED25519 [API Proposal]: Create PFX file (PKCS#12) from .cer .key and - Github But dealing with X.509 certificates on Windows is, well, a pain in the ass. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Can someone explain why this point is giving me 8.3V? The contents of the file path in certPemFilePath do not contain a PEM-encoded certificate, or it is malformed. The first is SysInternals Process Monitor, which will show you the file IO and registry access that's happening when you try and use your certificates. But the cause will probably be because you don't have permissions to that key file. I've had all kinds of bug reports about this. When a gnoll vampire assumes its hyena form, do its HP change? Your email address will not be published. Steps to digitally sign a PDF document using X509Certificate2 class object programmatically: Create a new C# console application project. OSX 10.10 import .pfx without a password? What is scrcpy OTG mode and how does it work? Note that the ExcelLibrary code is the single line at the bottom: Creating the Excel file is as easy as that. When an X509 certificate is presented to someone, .NET of course strips out the private key. As you might have gathered from above, getting the key storage flags right is crucial. Create X509Certificate2 from Cert and Key, without making a PFX file Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, I'm using .net 4, if it makes any difference, Hi Conrad, I know this is old, I'm stuck with exact same problem, can we have a chat and sort this out. X509Certificate2 Fails to load Pfx files that contain a 25519 key/cert instead reports wrong password, https://cryptography.io/en/latest/x509/reference.html#cryptography.x509.oid.SignatureAlgorithmOID.ED25519. How to import a .cer certificate into a java keystore? On whose turn does the fright from a terror dive end? These are the top rated real world C# (CSharp) examples of System.Security.Cryptography.X509Certificates.X509Certificate2.Import extracted from open source projects. This most often occurs when a certificate is backed up incorrectly and then later restored. Interesting findings. Though it's worth keeping in mind that supporting the primitive and supporting it in TLS / SslStream as the original issue asked for are different things. This forum has migrated to Microsoft Q&A. End result: hang. If the file's content begins with -----BEGIN and you can read it in a text editor: The file uses base64, which is readable in ASCII, not binary format. In the past I have been making secure TcpListener by exporting a PFX certificate with a password, but would like to know if this step could be skipped. What differentiates living as mere roommates from living in a marriage-like relationship? If total energies differ across different software, how do I decide which software to use? Your solution doesn't ever work in a manner you describe. For this use: I would recommend naming files with "includesprivatekey" to help you manage the permissions you keep with this file. This is a good way to see where the certificates and keys are being read from and written to. new X509Certificate2("server_chain25519.pfx", "qwerty"); Attached a text file that is a bashscript to generate the pfx file on the same format with the whole chain + private key and same password being used.

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