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Add warnings to documentation stating that p256-m code may be out of date with upstream, plus other minor grammatical fixes.

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Signed-off-by: Aditya Deshpande <aditya.deshpande@arm.com>
This commit is contained in:
Aditya Deshpande
2023-03-21 14:49:31 +00:00
parent be55bb2d5d
commit f100f00679
4 changed files with 10 additions and 5 deletions
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4
3rdparty/p256-m/README.md vendored
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The files within the `p256-m/` subdirectory originate from the [p256-m GitHub repository](https://github.com/mpg/p256-m), which is distributed under the Apache 2.0 license. They are authored by Manuel Pégourié-Gonnard. p256-m is a minimalistic implementation of ECDH and ECDSA on NIST P-256, especially suited to constrained 32-bit environments. Mbed TLS documentation for integrating drivers uses p256-m as an example of a software accelerator, and describes how it can be integrated alongside Mbed TLS.
The files within the `p256-m/` subdirectory originate from the [p256-m GitHub repository](https://github.com/mpg/p256-m), which is distributed under the Apache 2.0 license. They are authored by Manuel Pégourié-Gonnard. p256-m is a minimalistic implementation of ECDH and ECDSA on NIST P-256, especially suited to constrained 32-bit environments. Mbed TLS documentation for integrating drivers uses p256-m as an example of a software accelerator, and describes how it can be integrated alongside Mbed TLS. It should be noted that p256-m files in the Mbed TLS repo will not be updated regularly, so they may not have fixes and improvements present in the upstream project.
The files `p256-m.c` and `.h`, along with the license, have been taken from the `p256-m` repository.
It should be noted that p256-m deliberately does not supply its own cryptographically secure RNG function. As a result, an RNG function using `mbedtls_ctr_dbrg` has been implemented and added to `p256m.c`.
It should be noted that p256-m deliberately does not supply its own cryptographically secure RNG function. As a result, the PSA RNG is used, with `p256_generate_random()` wrapping `psa_generate_random()`.

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3rdparty/p256-m/p256-m/README.md vendored
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*This is the original README for the p256-m repository. Please note that as
only a subset of p256-m's files are present in Mbed TLS, this README may refer
to files that are not present/relevant here.*
p256-m is a minimalistic implementation of ECDH and ECDSA on NIST P-256,
especially suited to constrained 32-bit environments. It's written in standard
C, with optional bits of assembly for Arm Cortex-M and Cortex-A CPUs.