The buffer uses for temporary data must be cleared entirely. In AES192 the used buffer is drbg_statelen(drbg) + drbg_blocklen(drbg) as documented in the comment above drbg_ctr_df. This patch ensures that the temp buffer is completely wiped. Signed-off-by: Stephan Mueller <smueller@xxxxxxxxxx> --- crypto/drbg.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/crypto/drbg.c b/crypto/drbg.c index b69409c..8d2944f 100644 --- a/crypto/drbg.c +++ b/crypto/drbg.c @@ -487,7 +487,7 @@ static int drbg_ctr_df(struct drbg_state *drbg, out: memset(iv, 0, drbg_blocklen(drbg)); - memset(temp, 0, drbg_statelen(drbg)); + memset(temp, 0, drbg_statelen(drbg) + drbg_blocklen(drbg)); memset(pad, 0, drbg_blocklen(drbg)); return ret; } -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
