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Explicitly allow NULL as an argument to mbedtls_ccm_free()

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k-stachowiak 2018-12-11 14:37:51 +01:00 committed by Gilles Peskine
parent 438448e45f
commit fd42d531ba
2 changed files with 5 additions and 2 deletions
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4
include/mbedtls/ccm.h
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@ -109,7 +109,9 @@ int mbedtls_ccm_setkey( mbedtls_ccm_context *ctx,
* \brief This function releases and clears the specified CCM context * \brief This function releases and clears the specified CCM context
* and underlying cipher sub-context. * and underlying cipher sub-context.
* *
* \param ctx The CCM context to clear. Must not be \c NULL. * \param ctx The CCM context to clear.
*
* \note If ctx is \c NULL, the function has no effect.
*/ */
void mbedtls_ccm_free( mbedtls_ccm_context *ctx ); void mbedtls_ccm_free( mbedtls_ccm_context *ctx );

3
library/ccm.c
View File

@ -106,7 +106,8 @@ int mbedtls_ccm_setkey( mbedtls_ccm_context *ctx,
*/ */
void mbedtls_ccm_free( mbedtls_ccm_context *ctx ) void mbedtls_ccm_free( mbedtls_ccm_context *ctx )
{ {
CCM_VALIDATE( ctx != NULL ); if( ctx == NULL )
return;
mbedtls_cipher_free( &ctx->cipher_ctx ); mbedtls_cipher_free( &ctx->cipher_ctx );
mbedtls_platform_zeroize( ctx, sizeof( mbedtls_ccm_context ) ); mbedtls_platform_zeroize( ctx, sizeof( mbedtls_ccm_context ) );
} }