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AES: add config option for 128-bit keys

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Add configuration options to support only 128-bit key lengths in AES
calculation.
This commit is contained in:
Arto Kinnunen 2019-08-30 11:43:21 +03:00
parent e2bf54d3d1
commit 77b9cfcea9
6 changed files with 85 additions and 1 deletions
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19
include/mbedtls/config.h
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@ -3863,6 +3863,25 @@
/* \} SECTION: Compile-time SSL configuration */
/**
* \def MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH
*
* Use only 128-bit keys in AES operations.
*
* Uncommenting this macro removes support for AES operations that are using 192
* or 256-bit keys.
*
* Tradeoff: Uncommenting this macro reduces ROM footprint by ~200 bytes.
*
* If uncommented, uncomment also MBEDTLS_CTR_DRBG_USE_128_BIT_KEY
*
* Module: library/aes.c
*
* Requires: MBEDTLS_AES_C
*
*/
//#define MBEDTLS_AES_ONLY_128_BIT_KEY_LENGTH
/* Target and application specific configurations
*
* Allow user to override any previous default.