diff --git a/src/main/java/org/jruby/ext/openssl/PKeyRSA.java b/src/main/java/org/jruby/ext/openssl/PKeyRSA.java
index 6eef4588..665923cb 100644
--- a/src/main/java/org/jruby/ext/openssl/PKeyRSA.java
+++ b/src/main/java/org/jruby/ext/openssl/PKeyRSA.java
@@ -648,17 +648,19 @@ public synchronized IRubyObject get_q() {
         return getRuntime().getNil();
     }
 
-    @JRubyMethod(name="e")
-    public synchronized IRubyObject get_e() {
-        RSAPublicKey key;
-        BigInteger e;
-        if ((key = publicKey) != null) {
-            e = key.getPublicExponent();
-        } else if(privateKey != null) {
-            e = privateKey.getPublicExponent();
+    private BigInteger getPublicExponent() {
+        if (publicKey != null) {
+            return publicKey.getPublicExponent();
+        } else if (privateKey != null) {
+            return privateKey.getPublicExponent();
         } else {
-            e = rsa_e;
+            return rsa_e;
         }
+    }
+
+    @JRubyMethod(name="e")
+    public synchronized IRubyObject get_e() {
+        BigInteger e = getPublicExponent();
         if (e != null) {
             return BN.newBN(getRuntime(), e);
         }
@@ -679,17 +681,19 @@ public synchronized IRubyObject set_e(final ThreadContext context, IRubyObject v
         return value;
     }
 
-    @JRubyMethod(name="n")
-    public synchronized IRubyObject get_n() {
-        RSAPublicKey key;
-        BigInteger n;
-        if ((key = publicKey) != null) {
-            n = key.getModulus();
-        } else if(privateKey != null) {
-            n = privateKey.getModulus();
+    private BigInteger getModulus() {
+        if (publicKey != null) {
+            return publicKey.getModulus();
+        } else if (privateKey != null) {
+            return privateKey.getModulus();
         } else {
-            n = rsa_n;
+            return rsa_n;
         }
+    }
+
+    @JRubyMethod(name="n")
+    public synchronized IRubyObject get_n() {
+        BigInteger n = getModulus();
         if (n != null) {
             return BN.newBN(getRuntime(), n);
         }
@@ -715,8 +719,12 @@ private void generatePublicKeyIfParams(final ThreadContext context) {
 
         if ( publicKey != null ) throw newRSAError(runtime, "illegal modification");
 
-        BigInteger e, n;
-        if ( (e = rsa_e) != null && (n = rsa_n) != null ) {
+        // Don't access the rsa_n and rsa_e fields directly. They may have
+        // already been consumed and cleared by generatePrivateKeyIfParams.
+        BigInteger _rsa_n = getModulus();
+        BigInteger _rsa_e = getPublicExponent();
+
+        if (_rsa_n != null && _rsa_e != null) {
             final KeyFactory rsaFactory;
             try {
                 rsaFactory = SecurityHelper.getKeyFactory("RSA");
@@ -726,7 +734,7 @@ private void generatePublicKeyIfParams(final ThreadContext context) {
             }
 
             try {
-                publicKey = (RSAPublicKey) rsaFactory.generatePublic(new RSAPublicKeySpec(n, e));
+                publicKey = (RSAPublicKey) rsaFactory.generatePublic(new RSAPublicKeySpec(_rsa_n, _rsa_e));
             }
             catch (InvalidKeySpecException ex) {
                 throw newRSAError(runtime, "invalid parameters");
@@ -741,7 +749,12 @@ private void generatePrivateKeyIfParams(final ThreadContext context) {
 
         if ( privateKey != null ) throw newRSAError(runtime, "illegal modification");
 
-        if (rsa_e != null && rsa_n != null && rsa_p != null && rsa_q != null && rsa_d != null && rsa_dmp1 != null && rsa_dmq1 != null && rsa_iqmp != null) {
+        // Don't access the rsa_n and rsa_e fields directly. They may have
+        // already been consumed and cleared by generatePublicKeyIfParams.
+        BigInteger _rsa_n = getModulus();
+        BigInteger _rsa_e = getPublicExponent();
+
+        if (_rsa_n != null && _rsa_e != null && rsa_p != null && rsa_q != null && rsa_d != null && rsa_dmp1 != null && rsa_dmq1 != null && rsa_iqmp != null) {
             final KeyFactory rsaFactory;
             try {
                 rsaFactory = SecurityHelper.getKeyFactory("RSA");
@@ -752,7 +765,7 @@ private void generatePrivateKeyIfParams(final ThreadContext context) {
 
             try {
                 privateKey = (RSAPrivateCrtKey) rsaFactory.generatePrivate(
-                    new RSAPrivateCrtKeySpec(rsa_n, rsa_e, rsa_d, rsa_p, rsa_q, rsa_dmp1, rsa_dmq1, rsa_iqmp)
+                    new RSAPrivateCrtKeySpec(_rsa_n, _rsa_e, rsa_d, rsa_p, rsa_q, rsa_dmp1, rsa_dmq1, rsa_iqmp)
                 );
             }
             catch (InvalidKeySpecException e) {
diff --git a/src/test/ruby/rsa/test_rsa.rb b/src/test/ruby/rsa/test_rsa.rb
index dffd4dad..58ce1faa 100644
--- a/src/test/ruby/rsa/test_rsa.rb
+++ b/src/test/ruby/rsa/test_rsa.rb
@@ -47,4 +47,47 @@ def test_rsa_public_encrypt
     # }
   end
 
+  def test_rsa_param_accessors
+    key_file = File.join(File.dirname(__FILE__), 'private_key.pem')
+    key = OpenSSL::PKey::RSA.new(File.read(key_file))
+
+    [:e, :n, :d, :p, :q, :iqmp, :dmp1, :dmq1].each do |param|
+      rsa = OpenSSL::PKey::RSA.new
+      assert_nil(rsa.send(param))
+      value = key.send(param)
+      rsa.send("#{param}=", value)
+      assert_equal(value, rsa.send(param), param)
+    end
+  end
+
+  def test_rsa_from_params_public_first
+    key_file = File.join(File.dirname(__FILE__), 'private_key.pem')
+    key = OpenSSL::PKey::RSA.new(File.read(key_file))
+
+    rsa = OpenSSL::PKey::RSA.new
+    rsa.e, rsa.n = key.e, key.n
+    assert_nothing_raised { rsa.public_encrypt('Test string') }
+    [:e, :n].each {|param| assert_equal(key.send(param), rsa.send(param)) }
+
+    rsa.d, rsa.p, rsa.q, rsa.iqmp, rsa.dmp1, rsa.dmq1 = key.d, key.p, key.q, key.iqmp, key.dmp1, key.dmq1
+    assert_nothing_raised { rsa.private_encrypt('Test string') }
+    [:e, :n, :d, :p, :q, :iqmp, :dmp1, :dmq1].each do |param|
+      assert_equal(key.send(param), rsa.send(param), param)
+    end
+  end
+
+  def test_rsa_from_params_private_first
+    key_file = File.join(File.dirname(__FILE__), 'private_key.pem')
+    key = OpenSSL::PKey::RSA.new(File.read(key_file))
+
+    rsa = OpenSSL::PKey::RSA.new
+    rsa.d, rsa.p, rsa.q, rsa.iqmp, rsa.dmp1, rsa.dmq1 = key.d, key.p, key.q, key.iqmp, key.dmp1, key.dmq1
+    rsa.e, rsa.n = key.e, key.n
+    assert_nothing_raised { rsa.public_encrypt('Test string') }
+    assert_nothing_raised { rsa.private_encrypt('Test string') }
+    [:e, :n, :d, :p, :q, :iqmp, :dmp1, :dmq1].each do |param|
+      assert_equal(key.send(param), rsa.send(param), param)
+    end
+  end
+
 end