Ruby 3.0's openssl does not support the des3-wrap cipher.

spec/crypto/cipher/des3_spec.rb

@@ -20,24 +20,27 @@
       expect(subject.name).to eq("DES-EDE3-CBC")
     end
 
-    context "when given the mode: keyword argument" do
-      let(:mode) { :wrap }
-      let(:key)  { "A" * 24 }
-
-      subject do
-        described_class.new(
-          direction: :encrypt,
-          mode:      mode,
-          key:       key
-        )
-      end
-
-      it "must set #mode" do
-        expect(subject.mode).to eq(mode)
-      end
-
-      it "must initialize an DES3 cipher with the mode and direction" do
-        expect(subject.name).to eq("DES3-#{mode.upcase}")
+    # NOTE: Ruby 3.0's openssl does not support des3-wrap
+    if RUBY_VERSION >= '3.1.0'
+      context "when given the mode: keyword argument" do
+        let(:mode) { :wrap }
+        let(:key)  { "A" * 24 }
+
+        subject do
+          described_class.new(
+            direction: :encrypt,
+            mode:      mode,
+            key:       key
+          )
+        end
+
+        it "must set #mode" do
+          expect(subject.mode).to eq(mode)
+        end
+
+        it "must initialize an DES3 cipher with the mode and direction" do
+          expect(subject.name).to eq("DES3-#{mode.upcase}")
+        end
       end
     end
   end

spec/crypto/mixin_spec.rb

@@ -144,15 +144,18 @@
       expect(new_cipher.name).to eq("DES-EDE3-CBC")
     end
 
-    context "when the mode: keyword argument is given" do
-      let(:mode) { :wrap }
+    # NOTE: Ruby 3.0's openssl does not support des3-wrap
+    if RUBY_VERSION >= '3.1.0'
+      context "when the mode: keyword argument is given" do
+        let(:mode) { :wrap }
 
-      it "must use the given mode" do
-        new_cipher = subject.crypto_des3_cipher(mode:      mode,
-                                                direction: direction,
-                                                key:       key)
+        it "must use the given mode" do
+          new_cipher = subject.crypto_des3_cipher(mode:      mode,
+                                                  direction: direction,
+                                                  key:       key)
 
-        expect(new_cipher.name).to eq("DES3-#{mode.upcase}")
+          expect(new_cipher.name).to eq("DES3-#{mode.upcase}")
+        end
       end
     end
   end

spec/crypto_spec.rb

@@ -153,15 +153,18 @@
       expect(new_cipher.name).to eq("DES-EDE3-CBC")
     end
 
-    context "when the mode: keyword argument is given" do
-      let(:mode) { :wrap }
+    # NOTE: Ruby 3.0's openssl does not support des3-wrap
+    if RUBY_VERSION >= '3.1.0'
+      context "when the mode: keyword argument is given" do
+        let(:mode) { :wrap }
 
-      it "must use the given mode" do
-        new_cipher = subject.des3_cipher(mode:      mode,
-                                         direction: direction,
-                                         key:       key)
+        it "must use the given mode" do
+          new_cipher = subject.des3_cipher(mode:      mode,
+                                           direction: direction,
+                                           key:       key)
 
-        expect(new_cipher.name).to eq("DES3-#{mode.upcase}")
+          expect(new_cipher.name).to eq("DES3-#{mode.upcase}")
+        end
       end
     end
   end