diff options
| author | Stephan Mueller <smueller@chronox.de> | 2014-07-31 21:47:33 +0200 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2014-08-01 16:36:14 +0200 |
| commit | ce5481d01f67ad304908ec2113515440c0fa86eb (patch) | |
| tree | eb6d591256bcfaec0febc7edcf603566544a1210 /crypto/drbg.c | |
| parent | crypto: ccp - Do not sign extend input data to CCP (diff) | |
| download | linux-ce5481d01f67ad304908ec2113515440c0fa86eb.tar.xz linux-ce5481d01f67ad304908ec2113515440c0fa86eb.zip | |
crypto: drbg - fix failure of generating multiple of 2**16 bytes
The function drbg_generate_long slices the request into 2**16 byte
or smaller chunks. However, the loop, however invokes the random number
generation function with zero bytes when the request size is a multiple
of 2**16 bytes. The fix prevents zero bytes requests.
Signed-off-by: Stephan Mueller <smueller@chronox.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/drbg.c')
| -rw-r--r-- | crypto/drbg.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/crypto/drbg.c b/crypto/drbg.c index ff975d9e0c2a..7894db9ca90b 100644 --- a/crypto/drbg.c +++ b/crypto/drbg.c @@ -1500,7 +1500,7 @@ static int drbg_generate_long(struct drbg_state *drbg, if (0 >= tmplen) return tmplen; len += tmplen; - } while (slice > 0); + } while (slice > 0 && (len < buflen)); return len; } |