1 files changed, 95 insertions, 0 deletions
diff --git a/main/jni/jbcrypto.cpp b/main/jni/jbcrypto.cpp
new file mode 100644
index 00000000..2fd1262a
--- /dev/null
+++ b/main/jni/jbcrypto.cpp
@@ -0,0 +1,95 @@
+//
+//  JBCyrpto.cpp
+//  xcopenvpn
+//
+//  Created by Arne Schwabe on 12.07.12.
+//  Copyright (c) 2012 Universität Paderborn. All rights reserved.
+//
+
+#include <jni.h>
+
+#include <openssl/ssl.h>
+#include <openssl/rsa.h>
+#include <openssl/objects.h>
+#include <openssl/md5.h>
+#include <android/log.h>
+#include <openssl/err.h>
+
+
+extern "C" {
+jbyteArray Java_de_blinkt_openvpn_core_NativeUtils_rsasign(JNIEnv* env, jclass, jbyteArray from, jint pkeyRef);
+}
+
+int jniThrowException(JNIEnv* env, const char* className, const char* msg) {
+
+    jclass exceptionClass = env->FindClass(className);
+
+    if (exceptionClass == NULL) {
+        __android_log_print(ANDROID_LOG_DEBUG,"openvpn","Unable to find exception class %s", className);
+        /* ClassNotFoundException now pending */
+        return -1;
+    }
+
+    if (env->ThrowNew( exceptionClass, msg) != JNI_OK) {
+    	__android_log_print(ANDROID_LOG_DEBUG,"openvpn","Failed throwing '%s' '%s'", className, msg);
+        /* an exception, most likely OOM, will now be pending */
+        return -1;
+    }
+
+    env->DeleteLocalRef(exceptionClass);
+    return 0;
+}
+
+static char opensslerr[1024];
+jbyteArray Java_de_blinkt_openvpn_core_NativeUtils_rsasign (JNIEnv* env, jclass, jbyteArray from, jint pkeyRef) {
+
+	//	EVP_MD_CTX* ctx = reinterpret_cast<EVP_MD_CTX*>(ctxRef);
+	EVP_PKEY* pkey = reinterpret_cast<EVP_PKEY*>(pkeyRef);
+
+
+	if (pkey == NULL || from == NULL) {
+		jniThrowException(env, "java/lang/NullPointerException", "EVP_KEY is null");
+		return NULL;
+	}
+
+	jbyte* data =  env-> GetByteArrayElements (from, NULL);
+	int  datalen = env-> GetArrayLength(from);
+
+	if(data==NULL )
+		jniThrowException(env, "java/lang/NullPointerException", "data is null");
+
+    int siglen;
+	unsigned char* sigret = (unsigned char*)malloc(RSA_size(pkey->pkey.rsa));
+
+
+	//int RSA_sign(int type, const unsigned char *m, unsigned int m_len,
+	//           unsigned char *sigret, unsigned int *siglen, RSA *rsa);
+
+	// adapted from s3_clnt.c
+    /*	if (RSA_sign(NID_md5_sha1, (unsigned char*) data, datalen,
+        sigret, &siglen, pkey->pkey.rsa) <= 0 ) */
+
+    siglen = RSA_private_encrypt(datalen,(unsigned char*) data,sigret,pkey->pkey.rsa,RSA_PKCS1_PADDING);
+
+    if (siglen < 0)
+	{
+
+        ERR_error_string_n(ERR_get_error(), opensslerr ,1024);
+		jniThrowException(env, "java/security/InvalidKeyException", opensslerr);
+
+		ERR_print_errors_fp(stderr);
+		return NULL;
+
+
+	}
+
+
+	jbyteArray jb;
+
+	jb =env->NewByteArray(siglen);
+
+	env->SetByteArrayRegion(jb, 0, siglen, (jbyte *) sigret);
+	free(sigret);
+	return jb;
+
+}