summaryrefslogtreecommitdiff
path: root/ext/openssl/ossl_pkey_dh.c
diff options
context:
space:
mode:
authorrhe <rhe@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2016-05-26 05:24:58 +0000
committerrhe <rhe@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2016-05-26 05:24:58 +0000
commita1d9afc2957882e35523e25bbcc2c9923cbb31ce (patch)
tree55b24a13d29ec6a9234cb8e17cc76a19c80850b5 /ext/openssl/ossl_pkey_dh.c
parentef10b81c7839e6769c72ecdd6f54bad0d83a9038 (diff)
openssl: avoid NULL dereference in {DH,DSA,RSA}_size()
* ext/openssl/ossl_pkey_dh.c (ossl_dh_compute_key): Check that the DH has 'p' (the prime) before calling DH_size(). We can create a DH with no parameter but DH_size() does not check and dereferences NULL. [ruby-core:75720] [Bug #12428] * ext/openssl/ossl_pkey_dsa.c (ossl_dsa_sign): Ditto. DSA_size() does not check dsa->q. * ext/openssl/ossl_pkey_rsa.c (ossl_rsa_public_encrypt, ossl_rsa_public_decrypt, ossl_rsa_private_encrypt, ossl_rsa_private_decrypt): Ditto. RSA_size() does not check rsa->n. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55175 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'ext/openssl/ossl_pkey_dh.c')
-rw-r--r--ext/openssl/ossl_pkey_dh.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/ext/openssl/ossl_pkey_dh.c b/ext/openssl/ossl_pkey_dh.c
index fd2b804..ac951a6 100644
--- a/ext/openssl/ossl_pkey_dh.c
+++ b/ext/openssl/ossl_pkey_dh.c
@@ -501,6 +501,8 @@ ossl_dh_compute_key(VALUE self, VALUE pub)
GetPKeyDH(self, pkey);
dh = pkey->pkey.dh;
+ if (!dh->p)
+ ossl_raise(eDHError, "incomplete DH");
pub_key = GetBNPtr(pub);
len = DH_size(dh);
str = rb_str_new(0, len);