What is the use of preReqVals?

[s-c-c]

Hi, I can't find out what preReqVals are used for in the ACVP RSA protocol. How does valValue works?

[smuellerDD]

Am Montag, 20. Juli 2020, 10:02:34 CEST schrieb s-c-c: Hi s,

Hi, I can't find out what preReqVals are used for in the ACVP RSA protocol. How does valValue works?

Description: see RSA ACVP spec Table 2 Example: ``` { "algorithm": "RSA", "mode": "decryptionPrimitive", "revision": "1.0", "prereqVals": [ {"algorithm": "DRBG", "valValue": "123456"}, {"algorithm": "DRBG", "valValue": "654321"}, {"algorithm": "SHA", "valValue": "7890"} ] } ``` Ciao Stephan

[s-c-c]

That means SHA will use valValue as seed or something？

[smuellerDD]

Am Montag, 20. Juli 2020, 14:34:50 CEST schrieb s-c-c: Hi s,

That means SHA will use valValue as seed or something？

valValue points to another certificate number satisfying the dependency for the given cipher.

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Ciao Stephan

[s-c-c]

What does the value "same" mean?

[celic]

That the capabilities for SHA for example exist in the same test session as the algorithm that depends on SHA.

[s-c-c]

There are two mode for ecdsa keygen specified in FIPS 186-4. "extra bit" and "testing candidates".
Does openssl support both two modes? and in the api EC_KEY_generate_key, i dont find the param to controll
which mode to be used for keygen. i want to know how to select the mode for application?

[smuellerDD]

Am Dienstag, 21. Juli 2020, 08:07:56 CEST schrieb s-c-c: Hi s,

There are two mode for ecdsa keygen specified in FIPS 186-4. "extra bit" and "testing candidates". Does openssl support both two modes? and in the api EC_KEY_generate_key, i dont find the param to controll which mode to be used for keygen. i want to know how to select the mode for application?

This is a bug tracker for ACVP development. Your question is about OpenSSL. I think this question does not belong to this thread. The answer is given in [1] [1] https://github.com/smuellerDD/acvpproxy/blob/master/lib/ module_implementations/definition_impl_openssl.c#L544 Ciao Stephan

[dmchodnicki]

The original questions raised by this item have been answered. Therefore, the issue is being Closed. Future updates related to Prerequisite Processing are being tracked in issue #1071 .