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Fix copypasta; minor wording improvements

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Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
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Gilles Peskine 2020-11-16 21:44:23 +01:00
parent bb483f6af8
commit d8c27ccab0
1 changed files with 4 additions and 4 deletions
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docs/proposed/psa-conditional-inclusion-c.md
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@ -5,7 +5,7 @@ This document is a proposed interface for deciding at build time which cryptogra
This is currently a proposal for Mbed TLS. It is not currently on track for standardization in PSA.
Time-stamp: "2020/11/16 13:35:03 GMT"
Time-stamp: "2020/11/16 20:44:13 GMT"
## Introduction
@ -70,7 +70,7 @@ A PSA Crypto configuration symbol is a C preprocessor symbol whose name starts w
#### Configuration symbol usage
The presence of a symbol `PSA_WANT_xxx` in the Mbed TLS configuration determines whether a feature is available through the PSA API. These symbols should be used in any place that requires conditional compilation based on the availability of a cryptographic mechanism, including:
The presence of a symbol `PSA_WANT_xxx` in the Mbed TLS configuration determines whether a feature is available through the PSA API. These symbols should be used in any place that requires conditional compilation based on the availability of a cryptographic mechanism through the PSA API, including:
* In Mbed TLS test code.
* In Mbed TLS library code using `MBEDTLS_USE_PSA_CRYPTO`, for example in TLS to determine which cipher suites to enable.
@ -121,7 +121,7 @@ When `MBEDTLS_PSA_CRYPTO_CONFIG` is set, the header file `mbedtls/config.h` need
`mbedtls/config_psa.h` includes `psa/crypto_config.h`, the user-editable file that defines application requirements.
#### New-style definition of configuration symbols
#### Old-style definition of configuration symbols
When `MBEDTLS_PSA_CRYPTO_CONFIG` is not set, the configuration of Mbed TLS works as before, and the inclusion of non-PSA code only depends on `MBEDTLS_xxx` symbols defined (or not) in `mbedtls/config.h`. Furthermore, a new header file **`mbedtls/config_psa.h`** deduces PSA configuration symbols (`PSA_WANT_xxx`, `MBEDTLS_PSA_BUILTIN_xxx`) from classic configuration symbols (`MBEDTLS_xxx`).
@ -131,7 +131,7 @@ Since some existing applications use a handwritten `mbedtls/config.h` or an edit
#### Summary of definitions of configuration symbols
Both with and without `MBEDTLS_PSA_CRYPTO_CONFIG`, `mbedtls/config_psa.h` includes `mbedtls/crypto_drivers.h`, a header file generated by the transpilation of the driver descriptions. It defines `MBEDTLS_PSA_ACCEL_xxx` symbols according to the availability of transparent drivers without fallback.
Whether `MBEDTLS_PSA_CRYPTO_CONFIG` is set or not, `mbedtls/config_psa.h` includes `mbedtls/crypto_drivers.h`, a header file generated by the transpilation of the driver descriptions. It defines `MBEDTLS_PSA_ACCEL_xxx` symbols according to the availability of transparent drivers without fallback.
The following table summarizes where symbols are defined depending on the configuration mode.