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Explain the sequence of mbedtls_psa_pake_ calls

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Add a comment showing the order in which the mbedtls_psa_pake_xyz()
functions may be called.

Signed-off-by: David Horstmann <david.horstmann@arm.com>
This commit is contained in:
David Horstmann 2023-06-20 19:40:57 +01:00
parent 25c907071f
commit 57727cd3fc
1 changed files with 34 additions and 0 deletions
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34
library/psa_crypto_pake.c
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@ -79,6 +79,40 @@
* psa_pake_abort()
*/
/*
* Possible sequence of calls to implementation:
*
* |--- In any order:
* | |
* | |------ In Order
* | | | mbedtls_psa_pake_output(PSA_JPAKE_X1_STEP_KEY_SHARE)
* | | | mbedtls_psa_pake_output(PSA_JPAKE_X1_STEP_ZK_PUBLIC)
* | | | mbedtls_psa_pake_output(PSA_JPAKE_X1_STEP_ZK_PROOF)
* | | | mbedtls_psa_pake_output(PSA_JPAKE_X2_STEP_KEY_SHARE)
* | | | mbedtls_psa_pake_output(PSA_JPAKE_X2_STEP_ZK_PUBLIC)
* | | | mbedtls_psa_pake_output(PSA_JPAKE_X2_STEP_ZK_PROOF)
* | |
* | |------ In Order:
* | | mbedtls_psa_pake_input(PSA_JPAKE_X1_STEP_KEY_SHARE)
* | | mbedtls_psa_pake_input(PSA_JPAKE_X1_STEP_ZK_PUBLIC)
* | | mbedtls_psa_pake_input(PSA_JPAKE_X1_STEP_ZK_PROOF)
* | | mbedtls_psa_pake_input(PSA_JPAKE_X2_STEP_KEY_SHARE)
* | | mbedtls_psa_pake_input(PSA_JPAKE_X2_STEP_ZK_PUBLIC)
* | | mbedtls_psa_pake_input(PSA_JPAKE_X2_STEP_ZK_PROOF)
* |
* |--- In any order:
* | |
* | |------ In Order
* | | | mbedtls_psa_pake_output(PSA_JPAKE_X2S_STEP_KEY_SHARE)
* | | | mbedtls_psa_pake_output(PSA_JPAKE_X2S_STEP_ZK_PUBLIC)
* | | | mbedtls_psa_pake_output(PSA_JPAKE_X2S_STEP_ZK_PROOF)
* | |
* | |------ In Order:
* | | mbedtls_psa_pake_input(PSA_JPAKE_X4S_STEP_KEY_SHARE)
* | | mbedtls_psa_pake_input(PSA_JPAKE_X4S_STEP_ZK_PUBLIC)
* | | mbedtls_psa_pake_input(PSA_JPAKE_X4S_STEP_ZK_PROOF)
*/
#if defined(MBEDTLS_PSA_BUILTIN_ALG_JPAKE)
static psa_status_t mbedtls_ecjpake_to_psa_error(int ret)
{