pss | pss is a power-tool for searching inside source code files | Runtime Evironment library

Here is an approach using purrr::imap_dfc

You can do that with this simple recursive function which takes an array as the query:

The Python code uses PSS.MAX_LENGTH as the salt length. This value denotes the maximum salt length and is recommended in the Cryptography documentation (s. here):

salt_length (int) – The length of the salt. It is recommended that this be set to PSS.MAX_LENGTH

In RFC8017, which specifies PKCS#1 and thus also PSS, the default value of the salt length is defined as the output length of the hash (s. A.2.3. RSASSA-PSS):

For a given hashAlgorithm, the default value of saltLength is the octet length of the hash value.

Most libraries, e.g. PHPSECLIB, apply for the default value of the salt length the default defined in RFC8017, i.e. the output length of the hash (s. here). Therefore the maximum salt length must be set explicitly. The maximum salt length is given by (s. here):

The problem appears to be that white space and/or newline characters aren't being stripped from the strings read by readline. Changing the if statement to strip trailing characters should rectify that, e.g. if l[0].rstrip() == usr and l[1].rstrip() == pss:

You can use the fullrange argument in geom_smooth() to extrapolate from predictors that can extrapolate. (For example method = "loess" cannot).

In the Python code, the already hashed data is passed in the second parameter of RSAPublicKey#verify(). In this case a Prehashed instance must be passed in the fourth parameter of RSAPublicKey#verify(), i.e. specifically utils.Prehashed(hashes.SHA256()), see also this example.

Currently a HashAlgorithm instance is passed as the fourth parameter, i.e. specifically hashes.SHA256(). This is also possible, but only if instead of the already hashed data the original data (i.e. not hashed data) is passed in the second parameter. RSAPublicKey#verify() hashes implicitly in this case.

I.e. in the current Python code the data is double hashed when verifying. In the OpenSSL statement, however, the only single hashed data is signed. For this reason, the verification with the Python code fails.
If the signature is created with the Python code (as in your last example), the data is also hashed twice, thus resulting in successful verification.

The verification fails because both codes use different salt lengths. The Python code explicitly applies the maximum salt length, the C# code defaults to the digest output length. The latter is also defined as PSS default in RFC8017, A.2.3. RSASSA-PSS.

So to fix this

• either use the digest output length in the Python code, i.e. 32 (bytes for SHA256),
• or in the C# code the maximum salt length: signature length - digest output length - 2 = 512 - 32 - 2 = 478 (for a 4096 bits key).
  As far as I know this is not possible with .NET onboard means, but with BouncyCastle and the class Org.BouncyCastle.Crypto.Signers.PssSigner, which also provides constructors for defining the salt length. You can find an example here, last section.

It's a bug encounter this version, please check this Jira Ticket https://jira.mongodb.org/browse/SERVER-55247

I found it in OpenSSL sources. The answer is here