Commit ce5481d0 authored Jul 31, 2014 by Stephan Mueller Committed by Herbert Xu Aug 01, 2014

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>

parent 63917232

crypto/drbg.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}