diff --git a/Source/SwiftLintFramework/Extensions/Configuration+Cache.swift b/Source/SwiftLintFramework/Extensions/Configuration+Cache.swift
index b421a733b5..70c1f799eb 100644
--- a/Source/SwiftLintFramework/Extensions/Configuration+Cache.swift
+++ b/Source/SwiftLintFramework/Extensions/Configuration+Cache.swift
@@ -1,24 +1,5 @@
-#if canImport(CommonCrypto)
-import CommonCrypto
-#else
-import CryptoSwift
-#endif
 import Foundation
 
-#if canImport(CommonCrypto)
-private extension String {
-    func md5() -> String {
-        let context = UnsafeMutablePointer<CC_MD5_CTX>.allocate(capacity: 1)
-        var digest = [UInt8](repeating: 0, count: Int(CC_MD5_DIGEST_LENGTH))
-        CC_MD5_Init(context)
-        CC_MD5_Update(context, self, CC_LONG(lengthOfBytes(using: .utf8)))
-        CC_MD5_Final(&digest, context)
-        context.deallocate()
-        return digest.reduce(into: "") { $0.append(String(format: "%02x", $1)) }
-    }
-}
-#endif
-
 extension Configuration {
     // MARK: Caching Configurations By Path (In-Memory)
 
diff --git a/Source/SwiftLintFramework/Extensions/String+md5.swift b/Source/SwiftLintFramework/Extensions/String+md5.swift
new file mode 100644
index 0000000000..0807b674e0
--- /dev/null
+++ b/Source/SwiftLintFramework/Extensions/String+md5.swift
@@ -0,0 +1,20 @@
+#if canImport(CommonCrypto)
+import CommonCrypto
+#else
+import CryptoSwift
+#endif
+import Foundation
+
+#if canImport(CommonCrypto)
+extension String {
+    internal func md5() -> String {
+        let context = UnsafeMutablePointer<CC_MD5_CTX>.allocate(capacity: 1)
+        var digest = [UInt8](repeating: 0, count: Int(CC_MD5_DIGEST_LENGTH))
+        CC_MD5_Init(context)
+        CC_MD5_Update(context, self, CC_LONG(lengthOfBytes(using: .utf8)))
+        CC_MD5_Final(&digest, context)
+        context.deallocate()
+        return digest.reduce(into: "") { $0.append(String(format: "%02x", $1)) }
+    }
+}
+#endif
diff --git a/Source/SwiftLintFramework/Reporters/CodeClimateReporter.swift b/Source/SwiftLintFramework/Reporters/CodeClimateReporter.swift
index 61d199b3a1..1f1f176ffb 100644
--- a/Source/SwiftLintFramework/Reporters/CodeClimateReporter.swift
+++ b/Source/SwiftLintFramework/Reporters/CodeClimateReporter.swift
@@ -1,26 +1,7 @@
-#if canImport(CommonCrypto)
-import CommonCrypto
-#else
-import CryptoSwift
-#endif
 import Foundation
 import SourceKittenFramework
 
-#if canImport(CommonCrypto)
-private extension String {
-    func md5() -> String {
-        let context = UnsafeMutablePointer<CC_MD5_CTX>.allocate(capacity: 1)
-        var digest = [UInt8](repeating: 0, count: Int(CC_MD5_DIGEST_LENGTH))
-        CC_MD5_Init(context)
-        CC_MD5_Update(context, self, CC_LONG(lengthOfBytes(using: .utf8)))
-        CC_MD5_Final(&digest, context)
-        context.deallocate()
-        return digest.reduce(into: "") { $0.append(String(format: "%02x", $1)) }
-    }
-}
-#endif
-
-/// Reports violations as a JSON array.
+/// Reports violations as a JSON array in Code Climate format.
 public struct CodeClimateReporter: Reporter {
     // MARK: - Reporter Conformance