From: Jouni Malinen <jouni.malinen@atheros.com>
Date: Sun, 27 Jun 2010 04:03:25 +0000 (-0700)
Subject: OpenSSL: Fix public key length in DH group 5 operations
X-Git-Tag: hostap-1-bp~1276
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cc91e07e577bec7416ae2cba478a727c7719ba48;p=thirdparty%2Fhostap.git

OpenSSL: Fix public key length in DH group 5 operations

The length of the prime was used incorrectly and this resulted
in WPS DH operation failing whenever the public key ended up having
leading zeros (i.e., about every 1/256th time).
---

diff --git a/src/crypto/crypto_openssl.c b/src/crypto/crypto_openssl.c
index e1fcf471c..08c98aff4 100644
--- a/src/crypto/crypto_openssl.c
+++ b/src/crypto/crypto_openssl.c
@@ -434,7 +434,7 @@ void * dh5_init(struct wpabuf **priv, struct wpabuf **publ)
 	if (DH_generate_key(dh) != 1)
 		goto err;
 
-	publen = BN_num_bytes(dh->p);
+	publen = BN_num_bytes(dh->pub_key);
 	pubkey = wpabuf_alloc(publen);
 	if (pubkey == NULL)
 		goto err;