Disclaimer: although, it is not a straight answer to your question, but may contain directions for you to get the right way depending on a business requirements. There are two major issues in your question. One of them I tried to discuss in comments, but may need to explain. Let’s try to analyze your initial … Read more
Web cryptography api does not support PKCS # 12. You can use a third party library to decode the p12 as forge https://github.com/digitalbazaar/forge#pkcs12 and load privateKey in webcrypto Reading the PKCS#12 certificate PKCS#12 is stored in DER, so first read it from a File or use a pre-stored base64 //Reading certificate from a ‘file’ form … Read more
Disclosure: I work for CISPL, Co. which develops Signer.Digital Browser Extension Browser Extension may be used to Enroll Certificate (Generate CSR) and Download Certificate in Windows Certificate Store or Smartcard or USB Token from modern browsers. Browser extension provides JavaScript API which in turn talks to host application running on local machine to do the … Read more
I believe what you’re looking for is CryptQueryObject. With it you should be able to pull the involved certificate out of a PE, and do any additional checks you want. By way of example, this will get you to a HCRYPTMSG. From there you can use CryptMsgGetParam to pull out whatever you want. I’d hoped … Read more
Update Sept. 2022: 1Password supports generating and storing an SSH key for Git commit signature, recognized by GitHub. Update 2021: OpenSSH 8.2+ is available (packaged for instance in Git For Windows 2.33.1), and “it is now possible to sign arbitrary data with your SSH keys” (Andrew Ayer), including commits in Git. Andrew points to git/git … Read more
If anyone wants to debug release build using Android Studio, follow these steps: Set build variant to release mode. Right click on app in left navigation pane, click Open Module Settings. Go to Signing Tab. Add a signing config and fill in information. Select your keychain as well. Go to Build Type tab. Select release … Read more
OK, I’ve worked out what’s going on. Leonidas is right, it’s not just the hash that gets encrypted (in the case of the Cipher class method), it’s the ID of the hash algorithm concatenated with the digest: DigestInfo ::= SEQUENCE { digestAlgorithm AlgorithmIdentifier, digest OCTET STRING } Which is why the encryption by the Cipher … Read more
In-document visualisations of the signature validity have been deprecated nearly a decade ago. Adobe Reader supports them for backward compatibility reasons only but they have never been part of the iso pdf specification. The OP in a comment asked for documentation on this; this answer focuses on that. Deprecation in respect to Adobe Acrobat In … Read more
The open source iTextSharp library will allow you to do this. Here’s a post explaining how to digitally sign a pdf file. If you don’t want to use a third party library then you can implement it yourself but it could be a tough task -> you can start by reading the pdf specification (8.6MB)
The simple answer is that dgst -sign creates a hash, ASN1 encodes it, and then signs the ASN1 encoded hash, whereas rsautl -sign just signs the input without hashing or ASN1 encoding. Both methods include the input data in the output, together with the signature, rather than producing only a signature as output. Here is … Read more