How to build OpenSSL 1.1.1 for 64 bit Android using NDK 17

Issue

Failing to build OpenSSL for 64bit Android. Here are the steps I've taken:

1. Downloaded the setenv_android.sh from https://wiki.openssl.org/images/7/70/Setenv-android.sh
2. Downloaded OpenSSL 1.1.1 from https://www.openssl.org/source/old/1.1.1/openssl-1.1.1.tar.gz
3. Unpacked the tar file

4. Modified the setenv_android script so that running it produced this output:

   ANDROID_NDK_ROOT: /Users/spartygw/android-ndk-r17
   ANDROID_ARCH: arch-arm64
   ANDROID_EABI: aarch64-linux-android-4.9
   ANDROID_API: android-22
   ANDROID_SYSROOT: /Users/spartygw/android-ndk-r17/platforms/android-22/arch-arm64
   ANDROID_TOOLCHAIN: /Users/spartygw/android-ndk-r17/toolchains/aarch64-linux-android-4.9/prebuilt/darwin-x86_64/bin
   FIPS_SIG: 
   CROSS_COMPILE: aarch64-linux-android-
   ANDROID_DEV: /Users/spartygw/android-ndk-r17/platforms/android-22/arch-arm64/usr
   

5. Configured the openssl with: ./Configure no-rc5 no-idea no-md2 no-cast linux-aarch64

6. Ran make depend; make

Output:

In file included from crypto/aes/aesv8-armx.S:1:
crypto/arm_arch.h:55:6: error: "unsupported ARM architecture"
#    error "unsupported ARM architecture"
     ^
1 error generated.
make[1]: *** [crypto/aes/aesv8-armx.o] Error 1
make: *** [all] Error 2

This writeup makes it sound like I ran into this problem and stopped. I assure you I've spent a complete workday trying various things and googling to no avail. I don't want to litter the question with junk that I tried (passing in different ARM_ARCH values, trying other versions of openSSL, trying different NDKs).

Solution

The scripts and examples on OpenSSL Wik are badly outdated. The specific build script does not support arm64.

Luckily, GitHub comes to rescue: try https://github.com/noloader/Android-PRNG/blob/master/setenv-android.sh.

Answered By - Alex Cohn