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cmac: zeroize sensitive intermediate values

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Manuel Pégourié-Gonnard 2016-01-13 11:30:00 +00:00 committed by Simon Butcher
parent a610b4c04b
commit d6cf75474b
1 changed files with 5 additions and 0 deletions
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5
library/cmac.c
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@ -129,6 +129,8 @@ static int generate_subkeys( mbedtls_cmac_context *ctx )
multiply_by_u( ctx->K1, L ); multiply_by_u( ctx->K1, L );
multiply_by_u( ctx->K2, ctx->K1 ); multiply_by_u( ctx->K2, ctx->K1 );
mbedtls_zeroize( L, sizeof( L ) );
return( 0 ); return( 0 );
} }
@ -336,6 +338,9 @@ int mbedtls_aes_cmac_prf_128( mbedtls_cmac_context *ctx,
{ {
return( ret ); return( ret );
} }
mbedtls_zeroize( int_key, sizeof( int_key ) );
return( mbedtls_cmac_generate( ctx, input, in_len, tag, 16 ) ); return( mbedtls_cmac_generate( ctx, input, in_len, tag, 16 ) );
} }