curl with openssl prebuilt shared library for android

Indtiny s

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Sep 14, 2012, 1:28:44 PM9/14/12

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Hi,

yes I'm able to built the openssl1.0.1c version for android and got the shared libraries .

Now I want to use the same with curl , first I built simple curl application and tested and it worked now I tried to include the openssl .

below is the android.mk file which I have written to include openssl libraries for the curl code .

LOCAL_PATH:= $(call my-dir)

CFLAGS := -Wpointer-arith -Wwrite-strings -Wunused -Winline \

-Wnested-externs -Wmissing-declarations -Wmissing-prototypes -Wno-long-long \

-Wfloat-equal -Wno-multichar -Wsign-compare -Wno-format-nonliteral \

-Wendif-labels -Wstrict-prototypes -Wdeclaration-after-statement \

-Wno-system-headers -DHAVE_CONFIG_H

include $(CLEAR_VARS)

## Crypto lib

include $(CLEAR_VARS)

LOCAL_MODULE := xcryptox

LOCAL_SRC_FILES := openssl/lib/libcrypto.so

LOCAL_C_INCLUDES := $(LOCAL_PATH)/openssl/includes/openssl

include $(PREBUILT_SHARED_LIBRARY)

#

### SSL lib

include $(CLEAR_VARS)

LOCAL_MODULE := xsslx

LOCAL_SRC_FILES := openssl/libssl/lib/libssl.so

LOCAL_C_INCLUDES := $(LOCAL_PATH)/openssl/includes/openssl

include $(PREBUILT_SHARED_LIBRARY)

include $(LOCAL_PATH)/curl/lib/Makefile.inc .

LOCAL_SRC_FILES := $(addprefix curl/lib/,$(CSOURCES))

LOCAL_CFLAGS += $(CFLAGS)

LOCAL_C_INCLUDES += $(LOCAL_PATH)/curl/include/

LOCAL_COPY_HEADERS_TO := libcurl

LOCAL_COPY_HEADERS := $(addprefix curl/include/curl/,$(HHEADERS))

LOCAL_MODULE:= libcurl

include $(BUILD_STATIC_LIBRARY)

# Build shared library now

# curltest

include $(CLEAR_VARS)

LOCAL_MODULE := curltest

LOCAL_SRC_FILES := curltest.c

LOCAL_STATIC_LIBRARIES := libcurl

LOCAL_C_INCLUDES += $(LOCAL_PATH)/curl/include

include $(BUILD_SHARED_LIBRARY)

And below is my C curtest code with ssl include .

#include <string.h>

#include <jni.h>

#include <stdio.h>

#include <stdlib.h>

#include "curl_config.h"

#include "curl/curl.h"

typedef struct pageInfo_t {

char *data;

int len;

} pageInfo_t;

static size_t

HTTPData(void *buffer, size_t size, size_t nmemb, void *userData) {

int len = size * nmemb;

pageInfo_t *page = (pageInfo_t *)userData;

if (buffer && page->data && (page->len + len < (16 * 1024)) ) {

memcpy(&page->data[page->len], buffer, len);

page->len += len;

}

return len;

}

//Inteface funciton that will recieve web page fom Java

jstring

Java_com_mtterra_curltest_curltest_JNIGetWebpage( JNIEnv* env,

jobject entryObject,

jstring webpageJStr )

{

pageInfo_t page;

CURL *curl;

CURLcode res;

char *buffer;

static const char *pCertFile = "/sdcared/indu/openssl/testcert.pem";

static const char *pCACertFile="/sdcared/indu/openssl/cacert.pem";

const char *pKeyName;

const char *pKeyType;

const char *pEngine;

const jbyte *webpage;

pKeyName = "/sdcared/indu/openssl/testkey.pem";

pKeyType = "PEM";

pEngine = NULL;

webpage = (*env)->GetStringUTFChars(env, webpageJStr, NULL);

if (webpage == NULL) {

return NULL; /* OutOfMemoryError already thrown */

}

page.data = (char *)malloc(16 * 1024);

page.len = 0;

if (page.data)

memset(page.data, 32, 16 * 1024);

buffer = (char *)malloc(1024);

curl = curl_easy_init();

if(curl) {

curl_easy_setopt(curl, CURLOPT_URL, webpage);

curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, HTTPData);

curl_easy_setopt(curl, CURLOPT_WRITEDATA, &page);

/* since PEM is default, we needn't set it for PEM */

curl_easy_setopt(curl,CURLOPT_SSLCERTTYPE,"PEM");

/* set the cert for client authentication */

curl_easy_setopt(curl,CURLOPT_SSLCERT,pCertFile);

/* if we use a key stored in a crypto engine,

we must set the key type to "ENG" */

curl_easy_setopt(curl,CURLOPT_SSLKEYTYPE,pKeyType);

/* set the private key (file or ID in engine) */

curl_easy_setopt(curl,CURLOPT_SSLKEY,pKeyName);

/* set the file with the certs vaildating the server */

curl_easy_setopt(curl,CURLOPT_CAINFO,pCACertFile);

/* disconnect if we can't validate server's cert */

curl_easy_setopt(curl,CURLOPT_SSL_VERIFYPEER,1L);

res = curl_easy_perform(curl);

/* always cleanup */

curl_easy_cleanup(curl);

(*env)->ReleaseStringUTFChars(env, webpageJStr, webpage);

if(res == 0) {

if (buffer) {

page.data[page.len < 256 ? page.len : 256] = '\0';

sprintf(buffer, "pagedata(%d): %s. done.\n", page.len, page.data);

return (*env)->NewStringUTF(env, buffer);

}

sprintf(buffer, "Result %d", res);

return (*env)->NewStringUTF(env, buffer);

} else {

return (*env)->NewStringUTF(env, "Unable to init cURL");

}

I tried to run this but I get the response as just Result at the my java application code .. is the above method is the proper way to include the openssl in android..?

in my java code I'm just loading System.loadLibrary("curl");

Rgds

Indu

farmdve data.bg

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Sep 14, 2012, 1:54:50 PM9/14/12

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It's not clear if you built libcurl as a static library to begin with.
And not clear if you built OpenSSL as a static or shared library.

And you must load curltest(as that is the name of the module) not curl.

______________________________________________________________________
OpenSSL Project http://www.openssl.org
User Support Mailing List openss...@openssl.org
Automated List Manager majo...@openssl.org

Indtiny s

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Sep 14, 2012, 2:14:12 PM9/14/12

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Hi,

I have just ran ndk-build for the code https://github.com/aluvalassuman/OpenSSL1.0.1cForAndroid and it generated the two shared libraries in libs/ floder which I required , libcrypto.so and libssl.so( as build say these are shared libarray) I just included them in the curl code as prebuilt shared library(edited now to shared in the android make) , then Since I need to include the curl with openssl in my java code I want to build curl as shared library only .. I just changed my android curl make to shared ..

And sorry it was System.loadLibrary("curltest"); only .. but still I'm not getting the any response from the curl ...? am I following the correct way to use the openssl , becoz when I test the curl alone I get the proper http page requested ... !

Rgds

Indu

farmdve data.bg

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Sep 14, 2012, 3:34:36 PM9/14/12

to

Try using LogCat by connecting an Android device via USB, or launching
an emulator and opening a new Command Prompt for Windows or Terminal
instance in linux and type adb logcat.
Then launch the app and look at the output.

You see, Android ships with OpenSSL, but the version is usually quite
old. You need to compile OpenSSL 1.0.1c as static and link statically
to use the new library.

Indtiny s

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Sep 15, 2012, 6:18:37 AM9/15/12

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Hi,

Actually in my java application I will load all three shared libries (ssl,crypto and curl) ... Hence Iam trying build all libs as shared .

I tried to debug it as per your input , now I am getting the response as 1 i .e CURLE_UNSUPPORTED_PROTOCOL (1) when I tried to execute the https .

I think still the openssl is not included properly ..!!

I dunno where I have gone wrong .

Rgds

Indu

farmdve data.bg

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Sep 16, 2012, 2:09:50 PM9/16/12

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Trust me, I tried to load the shared libraries as well, but failed.
Statically linking was the only way to ensure my application uses the
latest OpenSSL regardless of Android version(though my ABI is set to
API level 8).

Indtiny s

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Sep 17, 2012, 12:02:58 AM9/17/12

to

Hi,

Can you pls tell me how to genearte the the static library from the android-openssl (from the link which you have sent .!

I tried to edit SHARED to STATIC in the Android.mk file at both ssl and crypto , but that did nt create any static library ..!

farmdve data.bg

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Sep 17, 2012, 7:47:26 AM9/17/12

to

Check the obj/local/armeabi folder for the static libraries.

Indtiny s

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Sep 17, 2012, 12:45:11 PM9/17/12

to

Hi,

Thanks.. I have generated the static libraries and pointed to the those libraries in my application android make .

Below is the Android.mk file for my application which uses the curl and openssl , Here do I need to build the static library separately for the openssl or have I followed the correct way ..?

LOCAL_PATH:= $(call my-dir)

ANDROID_ROOT := /home/chethan/Android/openssl

CFLAGS := -Wpointer-arith -Wwrite-strings -Wunused -Winline -Wnested-externs -Wmissing-declarations -Wmissing-prototypes -Wno-long-long -Wfloat-equal -Wno-multichar -Wsign-compare -Wno-format-nonliteral -Wendif-labels -Wstrict-prototypes -Wdeclaration-after-statement -Wno-system-headers -DHAVE_CONFIG_H

include $(CLEAR_VARS)

include $(LOCAL_PATH)/curl/lib/Makefile.inc

LOCAL_MODULE := static-curl

LOCAL_SRC_FILES := $(addprefix curl/lib/,$(CSOURCES))

LOCAL_C_INCLUDES += $(LOCAL_PATH)/curl/include $(LOCAL_PATH)/curl/lib $(LOCAL_PATH)/ares $(ANDROID_ROOT)/openssl/include

LOCAL_CFLAGS += $(CFLAGS) -DHAVE_CONFIG_H

LOCAL_STATIC_LIBRARIES := static-ares

LOCAL_LDFLAGS := -lssl -lcrypto -lz -L$(ANDROID_ROOT)/openssl/libs/armeabi -L/Android/android-ndk-r8/platforms/android-4/arch-arm/usr/libarget/product/generic/system/lib

include $(BUILD_STATIC_LIBRARY)

# include $(BUILD_SHARED_LIBRARY)

include $(CLEAR_VARS)

LOCAL_MODULE := curl

LOCAL_SRC_FILES := curl.c

LOCAL_STATIC_LIBRARIES := static-curl

LOCAL_C_INCLUDES += $(LOCAL_PATH)/curl/include $(LOCAL_PATH)/curl/lib

LOCAL_CFLAGS += -Wall

LOCAL_LDFLAGS += -llog -lssl -lcrypto -lz -L$(ANDROID_ROOT)/openssl/libs/armeabi -L$(ANDROID_ROOT)/openssl/obj/local/armeabi

include $(BUILD_SHARED_LIBRARY)