pk_from_sk: Add validation of s1 and s2
#841
Merged
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Altenative to #807 (re-using
chknorminstead of re-implementing a norm check, omitting tests for now).This commit adds validation of the s1 and s2 components of the secret key to the pk_from_sk function. It checks if coefficients are within the valid bound [-MLDSA_ETA, MLDSA_ETA] by using the chknorm function that is already present in the code.
Documentation and CBMC proofs are adjusted accordingly.