ecdh: new example demonstrating ECDH shared secret derivation #135
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Akshay-Belsare
commented
Aug 25, 2025
Akshay-Belsare
commented
- Introduced a new example utilizing the TEE_ALG_ECDH_DERIVE_SHARED_SECRET algorithm.
- This example demonstrates how to establish a shared secret using Elliptic Curve Diffie-Hellman (ECDH).
- Provides a reference for secure key exchange and cryptographic operations with ECDH in OP-TEE.
- Introduced a new example utilizing the TEE_ALG_ECDH_DERIVE_SHARED_SECRET algorithm. - This example demonstrates how to establish a shared secret using Elliptic Curve Diffie-Hellman (ECDH). - Provides a reference for secure key exchange and cryptographic operations with ECDH in OP-TEE. Signed-off-by: Amey Avinash Raghatate <[email protected]>
etienne-lms
reviewed
Sep 12, 2025
Update ecdh TA as per the review comments. Signed-off-by: Amey Avinash Raghatate <[email protected]>
etienne-lms
reviewed
Sep 23, 2025
Update ecdh TA as per the review comments Signed-off-by: Amey Avinash Raghatate <[email protected]>
Akshay-Belsare
pushed a commit
to Xilinx/optee_examples
that referenced
this pull request
Sep 29, 2025
- Introduced a new example utilizing the TEE_ALG_ECDH_DERIVE_SHARED_SECRET algorithm. - This example demonstrates how to establish a shared secret using Elliptic Curve Diffie-Hellman (ECDH). - Provides a reference for secure key exchange and cryptographic operations with ECDH in OP-TEE. Signed-off-by: Amey Avinash Raghatate <[email protected]> State: waiting Link: linaro-swg#135
etienne-lms
reviewed
Oct 10, 2025
Update param type for the function cmd_ecdh_selftest. Update ecdh TA and Host as per review comments. Signed-off-by: Amey Avinash Raghatate <[email protected]>
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@etienne-lms could you please have a look at this. Thanks! |
etienne-lms
reviewed
Oct 21, 2025
Comment on lines
+33
to
+35
| #define ECDH_MAX_BITS 521 | ||
| #define ECDH_MAX_BYTES ((ECDH_MAX_BITS + 7) / 8) | ||
| #define ECDH_BUF_BYTES (ECDH_MAX_BYTES + 14) |
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I think these 3 macros should not be part of the TA interface, to move to ecdh_ta.c.
They could but maybe specifying param[3].memref.buf recommended size is ECDH_BUF_BYTES but the TA API already allows CA to query the required size.
Why + 14?
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