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Status Delivered
Workspace z/TPF Product Family
Categories z/TPF
Created by Guest
Created on Jun 13, 2018

RELATED IDEAS

API Required for Random Number Generation on zTPF

Currently IBM has provided SHA-1 and SHA-256 APIs for use under zTPF. For example, we have tpf_SHA256_digest() function calls.

There is now support (via PRNO assembler instruction) on TPF to generate pseudo and true random numbers.

We'd like IBM to support new C APIs that provide the equivalent of PRNO pseudo and true random number generation functions. We realize that these are z14 specific capabilities.

Idea priority Medium
  • Guest
    Reply
    |     Apr 26, 2019

    This is available with z/TPF APAR PJ45130.

  • Guest
    Reply
    |     Jul 2, 2018

    The z14 processor introduces a new instruction PRNO-TRNG to perform "true" random number generation. In this case, the random number generator does not require it to be seeded by the caller. Seeded random number generators (or deterministic random number generators) are available on processors before z14. Which of these are you interested in? Having deterministic random number generation (where a seed is required) or true random number generators that do not take in a seed (z14 only)?

    The lab's opinion is the true random number generator is really what you are looking for, as this allows for true random numbers which would be better for security of passwords being generated. Obviously the true random number generator would only be available on z14, but wanted to confirm its the true random number generator you are interested in, rather than the deterministic random number generator (which exists today in software through GLIBC).

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