include openssl

android/CMakeLists.txt

@@ -0,0 +1,5 @@
+cmake_minimum_required(VERSION 3.6)
+project(flutter_openssl_crypto)
+find_package(openssl REQUIRED CONFIG)
+add_library(${PROJECT_NAME} SHARED empty.c)
+target_link_libraries(${PROJECT_NAME} PRIVATE openssl::crypto)

android/build.gradle

@@ -32,9 +32,26 @@ android {
     }
     defaultConfig {
         minSdkVersion 16
+
+        externalNativeBuild {
+            cmake {
+                arguments "-DANDROID_STL=c++_shared"
+            }
+        }
+    }
+
+    externalNativeBuild {
+        cmake {
+            path "CMakeLists.txt"
+        }
+    }
+
+    buildFeatures {
+        prefab true
     }
 }
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+    implementation "com.android.ndk.thirdparty:openssl:1.1.1g-alpha-1"
 }

ios/flutter_openssl_crypto.podspec

@@ -20,4 +20,6 @@ A new flutter plugin project.
   # Flutter.framework does not contain a i386 slice.
   s.pod_target_xcconfig = { 'DEFINES_MODULE' => 'YES', 'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386' }
   s.swift_version = '5.0'
+
+  s.dependency 'OpenSSL-Universal'
 end