Use libcryto.so and libssl.so in an android project?

Question

I am starting Android NDK. I want to create an RSA sample database on libsys openssl. First, I created libssl.so and libcrypto.so librairies with ndk-build in a guardian project. Then I create a new sample project for integrating libary (libss.so and lybcryto.so). I follow the same in the message

My application directory

TrialApp
|
|-->Activity.java (includes System.LoadLibrary calls)
|
|-->jni
    |-->TestJNI2.cpp
    |
    |-->Android.mk
    |
    |-->includes
    |   |
    |   |-->openssl (dir containing *.h files)
    |
    |-->precompiled
       |-->libssl.so
       |-->libcrypto.so

My android.mk:

LOCAL_PATH := $(call my-dir)

# Prebuilt libssl
include $(CLEAR_VARS)
LOCAL_MODULE := ssl
LOCAL_SRC_FILES := precompiled/libssl.so
include $(PREBUILT_SHARED_LIBRARY)

# Prebuilt libcrypto
include $(CLEAR_VARS)
LOCAL_MODULE := crypto
LOCAL_SRC_FILES := precompiled/libcrypto.so
include $(PREBUILT_SHARED_LIBRARY)
include $(CLEAR_VARS)

c_includes := $(LOCAL_PATH)
cf_includes := includes/openssl

cf_includes := $(addprefix -Ijni/,$(cf_includes))

export_c_includes := $(c_includes)

LOCAL_MODULE := security
LOCAL_SRC_FILES := TestJNI2.cpp
LOCAL_CFLAGS += $(cf_includes)
LOCAL_EXPORT_C_INCLUDES := $(export_c_includes)
LOCAL_LDLIBS := -llog
LOCAL_LDLIBS += $(LOCAL_PATH)/precompiled/libssl.so
LOCAL_LDLIBS += $(LOCAL_PATH)/precompiled/libcrypto.so

include $(BUILD_SHARED_LIBRARY)

TestJNI2.cpp

/* OpenSSL headers */

#include "openssl/bio.h"
#include "openssl/ssl.h"
#include "openssl/err.h"

/* Initializing OpenSSL */

void init_openssl(void){
    SSL_load_error_strings();
    ERR_load_BIO_strings();
    OpenSSL_add_all_algorithms();
}

Then when I build with ndk-build, problems always arise like this

/data/workspace/TestJNI2/jni/TestJNI2.cpp:3:25: error: openssl/bio.h: No such file or directory
/data/workspace/TestJNI2/jni/TestJNI2.cpp:4:25: error: openssl/ssl.h: No such file or directory
/data/workspace/TestJNI2/jni/TestJNI2.cpp:5:25: error: openssl/err.h: No such file or directory
/data/workspace/TestJNI2/jni/TestJNI2.cpp: In function 'void init_openssl()':
/data/workspace/TestJNI2/jni/TestJNI2.cpp:10: error: 'SSL_load_error_strings' was not declared in this scope
/data/workspace/TestJNI2/jni/TestJNI2.cpp:11: error: 'ERR_load_BIO_strings' was not declared in this scope
/data/workspace/TestJNI2/jni/TestJNI2.cpp:12: error: 'OpenSSL_add_all_algorithms' was not declared in this scope
make: *** [/data/workspace/TestJNI2/obj/local/armeabi/objs/security/TestJNI2.o] Error 1

Can anyone help me? Or how to build an RSA algorthim base example on openssl lib?

Answer 1

libssl libcrypto script. , ( , precompiled). , (, ) , /system/lib/libssl.so /system/lib/libcrypto.so .

Android.mk, ( , LOCAL_MODULE s, LOCAL_MODULE, , , , security, , , - ):

LOCAL_PATH := $(call my-dir)

# Prebuilt libssl
include $(CLEAR_VARS)
LOCAL_MODULE := ssl
LOCAL_SRC_FILES := precompiled/libPrivateSsl.so
include $(PREBUILT_SHARED_LIBRARY)

# Prebuilt libcrypto
include $(CLEAR_VARS)
LOCAL_MODULE := crypto
LOCAL_SRC_FILES := precompiled/libPrivateCrypto.so
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := PrivateSecurity
LOCAL_C_INCLUDES := includes
LOCAL_SRC_FILES := TestJNI2.cpp
LOCAL_LDLIBS := -llog
LOCAL_SHARED_LIBRARIES := ssl crypto

include $(BUILD_SHARED_LIBRARY)

, Java :

{
    System.loadLibrary("PrivateSsl");
    System.loadLibrary("PrivateCrypto");
    System.loadLibrary("PrivateSecurity");
}

Answer 2

Android NDK. RSA libss openssl.

, . libssl libcrypto script.

Android - zygote. init Linux. Zygote OpenSSL 0.9.8. OpenSSL 1.0.1, . - Android 0.9.8 ( Zygote), OpenSSL.

, libssl libcrypto.

Android, OpenSSL. wiki envrionment cross compiling. . FIPS Android.

, : -mfloat-abi=softfp. OpenSSL . , , . 0.0f (, , RAND_add).