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Why would signing credentials from a RSA-SHA512 X509Certificate2 appear to be RSA-SHA256?


Why would signing credentials from a RSA-SHA512 X509Certificate2 appear to be RSA-SHA256?

By : jjpaters
Date : November 17 2020, 11:55 AM
may help you . What you are probably misunderstanding is where the hashing algorithms are used. The first one is used during the creation of the signature over the certificate. The second one is the hashing algorithm that is used during signing with the private key that belongs to the certificate. That one seems to default to SHA-256.
Note that Microsoft is actually confusing hashing algorithms with signature algorithms. Maybe that once made some sense when everybody was still only using PKCS#1 v1.5 style signatures, but now it just makes them look stupid.
code :


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Does Free Pascal have a way to implement SHA256 or SHA512?

Does Free Pascal have a way to implement SHA256 or SHA512?


By : Lucy Maks
Date : March 29 2020, 07:55 AM
Any of those help In Google codesearch I found several units that implement it in pascal.
Query: sha256 | sha512 lang:pascal
Using SHA256 + SHA512 hash for password?

Using SHA256 + SHA512 hash for password?


By : Juanki Or
Date : March 29 2020, 07:55 AM
I wish this help you It is insufficient.
No salt: vulnerable to rainbow tables (if hashes are leaked) solution: use random salt in large domain Hashes are too fast: vulnerable to brute-force (if hashes are leaked) most hashing algorithms are designed to be fast solution: bcrypt, scrypt or multiple (many!!!) rounds No HMAC: does not have additional "server secret" (stored outside db!) solution: hmac-sha1, etc. Not part of a well-tested library/framework for authentication: this is a "roll your own" implementation solution: don't reinvent a wheel, unless it's one of these or these :)
Difference between signing with SHA256 vs. signing with RSA-SHA256

Difference between signing with SHA256 vs. signing with RSA-SHA256


By : Raj Mehta
Date : March 29 2020, 07:55 AM
Hope that helps A signature cannot be created by SHA256 alone.
SHA256 is a hashing algorithm; i.e. an algorithm creating a short fingerprint number representing an arbitrary large amount of data. To produce a signature, this fingerprint still has to be treated somehow to allow identification of the holder of some private signature key. One such treatment is to encrypt the fingerprint using the private key of a rsa key pair allowing others to decrypt the result using the associated public key and so verify that the keeper of the private key indeed must have been the signer.
using this code how do you know if sha256 or sha512 would be used?

using this code how do you know if sha256 or sha512 would be used?


By : user3258665
Date : March 29 2020, 07:55 AM
help you fix your problem SHA512 is in the SHA-2 families. Variants are listed in NIST FIPS 180-4
code :
- SHA-512/256 truncated from SHA-512 with different initial values 
- SHA-512/224 truncated from SHA-512 with different initial values
- SHA-384     truncated from SHA-512 with different initial values
- SHA-512

- SHA-224     truncated from SHA-256 with different initial values
- SHA-256
sha_512 := sha512.New()
sha_512.Write([]byte(input))
hash := base64.URLEncoding.EncodeToString(sha_512.Sum(nil))
Use X509Certificate2 to sign and validate ECDSA-SHA256 signatures

Use X509Certificate2 to sign and validate ECDSA-SHA256 signatures


By : A.R. Darmanin
Date : March 29 2020, 07:55 AM
it fixes the issue I used OpenSSL to create ECC certificates using SHA256. Now I want to use these certificates to sign data and to validate existing signatures. , Support for this was added in .NET 4.6.1:
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