diff options
Diffstat (limited to 'crypto/ansi_cprng.c')
| -rw-r--r-- | crypto/ansi_cprng.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/crypto/ansi_cprng.c b/crypto/ansi_cprng.c index ffa0245e2ab..6ddd99e6114 100644 --- a/crypto/ansi_cprng.c +++ b/crypto/ansi_cprng.c @@ -414,10 +414,18 @@ static int fips_cprng_get_random(struct crypto_rng *tfm, u8 *rdata, static int fips_cprng_reset(struct crypto_rng *tfm, u8 *seed, unsigned int slen) { u8 rdata[DEFAULT_BLK_SZ]; + u8 *key = seed + DEFAULT_BLK_SZ; int rc; struct prng_context *prng = crypto_rng_ctx(tfm); + if (slen < DEFAULT_PRNG_KSZ + DEFAULT_BLK_SZ) + return -EINVAL; + + /* fips strictly requires seed != key */ + if (!memcmp(seed, key, DEFAULT_PRNG_KSZ)) + return -EINVAL; + rc = cprng_reset(tfm, seed, slen); if (!rc) |