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PSA PAKE: Relate JPAKE documentation to RFC8236

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Signed-off-by: Janos Follath <janos.follath@arm.com>
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Janos Follath 2021-04-19 14:35:03 +01:00
parent 7ebcbf34f9
commit ef1b8c9a76
1 changed files with 21 additions and 1 deletions
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22
include/psa/crypto_values.h
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@ -1986,30 +1986,50 @@
*
* The key exchange flow for JPAKE is as follows:
* -# To get the first round data that needs to be sent to the peer, call
* // Get g1
* psa_pake_output(operation, #PSA_PAKE_DATA_KEY_SHARE, ...);
* // Get the ZKP public key for x1
* psa_pake_output(operation, #PSA_PAKE_DATA_ZK_PUBLIC, ...);
* // Get the ZKP proof for x1
* psa_pake_output(operation, #PSA_PAKE_DATA_ZK_PROOF, ...);
* // Get g2
* psa_pake_output(operation, #PSA_PAKE_DATA_KEY_SHARE_2, ...);
* // Get the ZKP public key for x2
* psa_pake_output(operation, #PSA_PAKE_DATA_ZK_PUBLIC_2, ...);
* // Get the ZKP proof for x2
* psa_pake_output(operation, #PSA_PAKE_DATA_ZK_PROOF_2, ...);
* -# To provide the first round data received from the peer to the operation,
* call
* // Set g3
* psa_pake_input(operation, #PSA_PAKE_DATA_KEY_SHARE, ...);
* // Set the ZKP public key for x3
* psa_pake_input(operation, #PSA_PAKE_DATA_ZK_PUBLIC, ...);
* // Set the ZKP proof for x3
* psa_pake_input(operation, #PSA_PAKE_DATA_ZK_PROOF, ...);
* // Set g4
* psa_pake_input(operation, #PSA_PAKE_DATA_KEY_SHARE_2, ...);
* // Set the ZKP public key for x4
* psa_pake_input(operation, #PSA_PAKE_DATA_ZK_PUBLIC_2, ...);
* // Set the ZKP proof for x4
* psa_pake_input(operation, #PSA_PAKE_DATA_ZK_PROOF_2, ...);
* -# To get the second round data that needs to be sent to the peer, call
* // Get A
* psa_pake_output(operation, #PSA_PAKE_DATA_KEY_SHARE_3, ...);
* // Get ZKP public key for x2*s
* psa_pake_output(operation, #PSA_PAKE_DATA_ZK_PUBLIC_3, ...);
* // Get ZKP proof for x2*s
* psa_pake_output(operation, #PSA_PAKE_DATA_ZK_PROOF_3, ...);
* -# To provide the second round data received from the peer to the operation,
* call
* // Set B
* psa_pake_input(operation, #PSA_PAKE_DATA_KEY_SHARE_3, ...);
* // Set ZKP public key for x4*s
* psa_pake_input(operation, #PSA_PAKE_DATA_ZK_PUBLIC_3, ...);
* // Set ZKP proof for x4*s
* psa_pake_input(operation, #PSA_PAKE_DATA_ZK_PROOF_3, ...);
* -# Call psa_pake_get_implicit_key() for accessing the shared secret.
* -# To access the shared secret call
* // Get Ka=Kb=K
* psa_pake_get_implicit_key()
*
* For more information consult the documentation of the individual
* PSA_PAKE_DATA_XXX constants.