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Language / verbiage fixes

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Signed-off-by: Steven Cooreman <steven.cooreman@silabs.com>
This commit is contained in:
Steven Cooreman 2021-02-22 17:05:56 +01:00
parent aaec341c9b
commit 7de9e2db1f
2 changed files with 6 additions and 9 deletions
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11
ChangeLog.d/psa-crypto-new-wildcard-policies.txt
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@ -1,8 +1,5 @@
Features Features
* Added PSA_ALG_AEAD_WITH_AT_LEAST_THIS_LENGTH_TAG and * In the PSA API, the policy for a MAC or AEAD algorithm can specify a
PSA_ALG_AT_LEAST_THIS_LENGTH_MAC as wildcard algorithms in PSA Crypto. minimum MAC or tag length thanks to the new wildcards
These algorithm values describe that a key is allowed to be used with any PSA_ALG_AT_LEAST_THIS_LENGTH_MAC and
algorithm that matches the specified base algorithm (e.g PSA_ALG_CCM for PSA_ALG_AEAD_WITH_AT_LEAST_THIS_LENGTH_TAG.
AEAD or PSA_ALG_CMAC for MAC) and has a tag/MAC length which is at least
as long as the one encoded in the AT_LEAST_THIS_LENGTH_MAC/TAG wildcard
algorithm.

4
library/psa_crypto.c
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@ -675,7 +675,7 @@ static psa_algorithm_t psa_key_policy_algorithm_intersection(
return( alg1 ); return( alg1 );
} }
/* If the policies are from the same AEAD family, check whether /* If the policies are from the same AEAD family, check whether
* one f them is a minimum-tag-length wildcard. Calculate the most * one of them is a minimum-tag-length wildcard. Calculate the most
* restrictive tag length. */ * restrictive tag length. */
if( PSA_ALG_IS_AEAD( alg1 ) && PSA_ALG_IS_AEAD( alg2 ) && if( PSA_ALG_IS_AEAD( alg1 ) && PSA_ALG_IS_AEAD( alg2 ) &&
( PSA_ALG_AEAD_WITH_SHORTENED_TAG( alg1, 0 ) == ( PSA_ALG_AEAD_WITH_SHORTENED_TAG( alg1, 0 ) ==
@ -685,7 +685,7 @@ static psa_algorithm_t psa_key_policy_algorithm_intersection(
size_t alg2_len = PSA_ALG_AEAD_GET_TAG_LENGTH( alg2 ); size_t alg2_len = PSA_ALG_AEAD_GET_TAG_LENGTH( alg2 );
size_t max_len = alg1_len > alg2_len ? alg1_len : alg2_len; size_t max_len = alg1_len > alg2_len ? alg1_len : alg2_len;
/* If both are wildcards, return most restricitve wildcard */ /* If both are wildcards, return most restrictive wildcard */
if( ( ( alg1 & PSA_ALG_AEAD_MINIMUM_LENGTH_FLAG ) != 0 ) && if( ( ( alg1 & PSA_ALG_AEAD_MINIMUM_LENGTH_FLAG ) != 0 ) &&
( ( alg2 & PSA_ALG_AEAD_MINIMUM_LENGTH_FLAG ) != 0 ) ) ( ( alg2 & PSA_ALG_AEAD_MINIMUM_LENGTH_FLAG ) != 0 ) )
{ {