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Signed-off-by: Hanno Becker <hanno.becker@arm.com>
This commit is contained in:
Hanno Becker 2020-09-09 12:57:16 +01:00
parent 0973ff9545
commit 97a21567df
1 changed files with 6 additions and 4 deletions
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4
library/ssl_tls13_keys.c
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@ -254,13 +254,15 @@ int mbedtls_ssl_tls1_3_derive_secret(
clen = mbedtls_md_get_size( md ); clen = mbedtls_md_get_size( md );
} }
else else
{
if( clen > sizeof(hashed_context) )
{ {
/* This should never happen since this function is internal /* This should never happen since this function is internal
* and the code sets `context_already_hashed` correctly. * and the code sets `context_already_hashed` correctly.
* Let's double-check nonetheless to not run at the risk * Let's double-check nonetheless to not run at the risk
* of getting a stack overflow. */ * of getting a stack overflow. */
if( clen > sizeof(hashed_context) )
return( MBEDTLS_ERR_SSL_INTERNAL_ERROR ); return( MBEDTLS_ERR_SSL_INTERNAL_ERROR );
}
memcpy( hashed_context, ctx, clen ); memcpy( hashed_context, ctx, clen );
} }