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Improve documentation about driver-only p256-m.

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Signed-off-by: Manuel Pégourié-Gonnard <manuel.pegourie-gonnard@arm.com>
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Manuel Pégourié-Gonnard 2023-09-22 12:33:58 +02:00
parent 5aab46b91e
commit dfa42b34ab
2 changed files with 8 additions and 8 deletions
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2
docs/psa-driver-example-and-guide.md
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@ -146,7 +146,7 @@ The Mbed TLS build system includes the instructions needed to build p256-m. To b
python3 scripts/config.py set MBEDTLS_PSA_P256M_DRIVER_ENABLED
make
(You need extra steps if you want to disable the built-in implementation of ECC algorithms, which includes more features than p256-m. Refer to the documentation of `MBEDTLS_PSA_P256M_DRIVER_ENABLED` for more information.)
(You need extra steps if you want to disable the built-in implementation of ECC algorithms, which includes more features than p256-m. Refer to the documentation of `MBEDTLS_PSA_P256M_DRIVER_ENABLED` and `docs/driver-only-builds.md` for more information.)
The driver prefix for p256-m is `P256`/`p256`.
The p256-m driver implements the following entry points: `import_key`, `export_public_key`, `generate_key`, `key_agreement`, `sign_hash`, `verify_hash`.

14
include/mbedtls/mbedtls_config.h
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@ -1453,13 +1453,13 @@
*
* \note To genuinely benefit from the smaller code size of p256-m, make
* sure that you do not enable any ECC-related option that requires
* the built-in implementation of elliptic curve arithmetic. This
* means enabling #MBEDTLS_PSA_CRYPTO_C, #MBEDTLS_PSA_CRYPTO_CONFIG,
* #PSA_WANT_ECC_SECP_R1_256 and #MBEDTLS_PSA_P256M_DRIVER_ENABLED,
* plus any of the `PSA_WANT_ALG_xxx` and `PSA_WANT_KEY_TYPE_xxx`
* options listed above, and not enabling other ECC-related options
* through `PSA_WANT_xxx` or `MBEDTLS_xxx` (in particular, not
* enabling other curves or EC-JPAKE).
* the built-in implementation of elliptic curve arithmetic. Make sure
* #PSA_WANT_ALG_DETERMINISTIC_ECDSA, #PSA_WANT_ALG_JPAKE and
* #PSA_WANT_KEY_TYPE_ECC_KEY_PAIR_DERIVE, and curves other than
* SECP256R1 are disabled as they are not supported by this driver.
* Also, avoid defining #MBEDTLS_PK_PARSE_EC_COMPRESSED or
* #MBEDTLS_PK_PARSE_EC_EXTENDED as those currently require a subset of
* the built-in ECC implementation, see docs/driver-only-builts.md.
*/
//#define MBEDTLS_PSA_P256M_DRIVER_ENABLED