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Drop support for compatibility with our own previous buggy implementation of truncated HMAC (MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT).

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Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
This commit is contained in:
Mateusz Starzyk
2021-02-19 13:40:25 +01:00
parent 06b07fb839
commit 2012ed7560
7 changed files with 1 additions and 70 deletions
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4
include/mbedtls/check_config.h
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@ -81,10 +81,6 @@
#error "MBEDTLS_DHM_C defined, but not all prerequisites"
#endif
#if defined(MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT) && !defined(MBEDTLS_SSL_TRUNCATED_HMAC)
#error "MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT defined, but not all prerequisites"
#endif
#if defined(MBEDTLS_CMAC_C) && \
!defined(MBEDTLS_AES_C) && !defined(MBEDTLS_DES_C)
#error "MBEDTLS_CMAC_C defined, but not all prerequisites"

24
include/mbedtls/config.h
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@ -1924,30 +1924,6 @@
*/
#define MBEDTLS_SSL_TRUNCATED_HMAC
/**
* \def MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT
*
* Fallback to old (pre-2.7), non-conforming implementation of the truncated
* HMAC extension which also truncates the HMAC key. Note that this option is
* only meant for a transitory upgrade period and will be removed in a future
* version of the library.
*
* \warning The old implementation is non-compliant and has a security weakness
* (2^80 brute force attack on the HMAC key used for a single,
* uninterrupted connection). This should only be enabled temporarily
* when (1) the use of truncated HMAC is essential in order to save
* bandwidth, and (2) the peer is an Mbed TLS stack that doesn't use
* the fixed implementation yet (pre-2.7).
*
* \deprecated This option is deprecated and will be removed in a
* future version of Mbed TLS.
*
* Uncomment to fallback to old, non-compliant truncated HMAC implementation.
*
* Requires: MBEDTLS_SSL_TRUNCATED_HMAC
*/
//#define MBEDTLS_SSL_TRUNCATED_HMAC_COMPAT
/**
* \def MBEDTLS_SSL_VARIABLE_BUFFER_LENGTH
*