From a1d9afc2957882e35523e25bbcc2c9923cbb31ce Mon Sep 17 00:00:00 2001 From: rhe Date: Thu, 26 May 2016 05:24:58 +0000 Subject: 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 --- ext/openssl/ossl_pkey_rsa.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) (limited to 'ext/openssl/ossl_pkey_rsa.c') diff --git a/ext/openssl/ossl_pkey_rsa.c b/ext/openssl/ossl_pkey_rsa.c index 9cb50893c8..ea2af251cf 100644 --- a/ext/openssl/ossl_pkey_rsa.c +++ b/ext/openssl/ossl_pkey_rsa.c @@ -382,6 +382,8 @@ ossl_rsa_public_encrypt(int argc, VALUE *argv, VALUE self) VALUE str, buffer, padding; GetPKeyRSA(self, pkey); + if (!pkey->pkey.rsa->n) + ossl_raise(eRSAError, "incomplete RSA"); rb_scan_args(argc, argv, "11", &buffer, &padding); pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding); StringValue(buffer); @@ -411,6 +413,8 @@ ossl_rsa_public_decrypt(int argc, VALUE *argv, VALUE self) VALUE str, buffer, padding; GetPKeyRSA(self, pkey); + if (!pkey->pkey.rsa->n) + ossl_raise(eRSAError, "incomplete RSA"); rb_scan_args(argc, argv, "11", &buffer, &padding); pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding); StringValue(buffer); @@ -440,9 +444,10 @@ ossl_rsa_private_encrypt(int argc, VALUE *argv, VALUE self) VALUE str, buffer, padding; GetPKeyRSA(self, pkey); - if (!RSA_PRIVATE(self, pkey->pkey.rsa)) { - ossl_raise(eRSAError, "private key needed."); - } + if (!pkey->pkey.rsa->n) + ossl_raise(eRSAError, "incomplete RSA"); + if (!RSA_PRIVATE(self, pkey->pkey.rsa)) + ossl_raise(eRSAError, "private key needed"); rb_scan_args(argc, argv, "11", &buffer, &padding); pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding); StringValue(buffer); @@ -472,9 +477,10 @@ ossl_rsa_private_decrypt(int argc, VALUE *argv, VALUE self) VALUE str, buffer, padding; GetPKeyRSA(self, pkey); - if (!RSA_PRIVATE(self, pkey->pkey.rsa)) { - ossl_raise(eRSAError, "private key needed."); - } + if (!pkey->pkey.rsa->n) + ossl_raise(eRSAError, "incomplete RSA"); + if (!RSA_PRIVATE(self, pkey->pkey.rsa)) + ossl_raise(eRSAError, "private key needed"); rb_scan_args(argc, argv, "11", &buffer, &padding); pad = (argc == 1) ? RSA_PKCS1_PADDING : NUM2INT(padding); StringValue(buffer); -- cgit v1.2.3