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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
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')
-rw-r--r--ext/openssl/ossl_pkey_dh.c2
-rw-r--r--ext/openssl/ossl_pkey_dsa.c7
-rw-r--r--ext/openssl/ossl_pkey_rsa.c18
3 files changed, 18 insertions, 9 deletions
diff --git a/ext/openssl/ossl_pkey_dh.c b/ext/openssl/ossl_pkey_dh.c
index fd2b80497da..ac951a6e582 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);
diff --git a/ext/openssl/ossl_pkey_dsa.c b/ext/openssl/ossl_pkey_dsa.c
index 29033809645..704fad6d4de 100644
--- a/ext/openssl/ossl_pkey_dsa.c
+++ b/ext/openssl/ossl_pkey_dsa.c
@@ -488,10 +488,11 @@ ossl_dsa_sign(VALUE self, VALUE data)
VALUE str;
GetPKeyDSA(self, pkey);
- StringValue(data);
- if (!DSA_PRIVATE(self, pkey->pkey.dsa)) {
+ if (!pkey->pkey.dsa->q)
+ ossl_raise(eDSAError, "incomplete DSA");
+ if (!DSA_PRIVATE(self, pkey->pkey.dsa))
ossl_raise(eDSAError, "Private DSA key needed!");
- }
+ StringValue(data);
str = rb_str_new(0, ossl_dsa_buf_size(pkey));
if (!DSA_sign(0, (unsigned char *)RSTRING_PTR(data), RSTRING_LENINT(data),
(unsigned char *)RSTRING_PTR(str),
diff --git a/ext/openssl/ossl_pkey_rsa.c b/ext/openssl/ossl_pkey_rsa.c
index 9cb50893c85..ea2af251cf1 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);