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-rw-r--r--contrib/Curve25519Donna.c118
-rw-r--r--contrib/Curve25519Donna.h53
-rw-r--r--contrib/Curve25519Donna.java77
-rw-r--r--contrib/make-snippets68
4 files changed, 316 insertions, 0 deletions
diff --git a/contrib/Curve25519Donna.c b/contrib/Curve25519Donna.c
new file mode 100644
index 0000000..71b816c
--- /dev/null
+++ b/contrib/Curve25519Donna.c
@@ -0,0 +1,118 @@
+/*
+ James Robson
+ Public domain.
+*/
+
+#include "Curve25519Donna.h"
+#include <stdio.h>
+#include <stdlib.h>
+
+extern void curve25519_donna(unsigned char *output, const unsigned char *a,
+ const unsigned char *b);
+
+unsigned char*
+as_unsigned_char_array(JNIEnv* env, jbyteArray array, int* len);
+
+jbyteArray as_byte_array(JNIEnv* env, unsigned char* buf, int len);
+
+
+jbyteArray as_byte_array(JNIEnv* env, unsigned char* buf, int len) {
+ jbyteArray array = (*env)->NewByteArray(env, len);
+ (*env)->SetByteArrayRegion(env, array, 0, len, (jbyte*)buf);
+
+ //int i;
+ //for (i = 0;i < len;++i) printf("%02x",(unsigned int) buf[i]); printf(" ");
+ //printf("\n");
+
+ return array;
+}
+
+unsigned char*
+as_unsigned_char_array(JNIEnv* env, jbyteArray array, int* len) {
+
+ *len = (*env)->GetArrayLength(env, array);
+ unsigned char* buf = (unsigned char*)calloc(*len+1, sizeof(char));
+ (*env)->GetByteArrayRegion (env, array, 0, *len, (jbyte*)buf);
+ return buf;
+
+}
+
+JNIEXPORT jbyteArray JNICALL Java_Curve25519Donna_curve25519Donna
+ (JNIEnv *env, jobject obj, jbyteArray a, jbyteArray b) {
+
+ unsigned char o[32] = {0};
+ int l1, l2;
+ unsigned char* a1 = as_unsigned_char_array(env, a, &l1);
+ unsigned char* b1 = as_unsigned_char_array(env, b, &l2);
+
+ if ( !(l1 == 32 && l2 == 32) ) {
+ fprintf(stderr, "Error, must be length 32");
+ return NULL;
+ }
+
+
+ curve25519_donna(o, (const unsigned char*)a1, (const unsigned char*)b1);
+
+ free(a1);
+ free(b1);
+
+ return as_byte_array(env, (unsigned char*)o, 32);
+}
+
+JNIEXPORT jbyteArray JNICALL Java_Curve25519Donna_makePrivate
+ (JNIEnv *env, jobject obj, jbyteArray secret) {
+
+ int len;
+ unsigned char* k = as_unsigned_char_array(env, secret, &len);
+
+ if (len != 32) {
+ fprintf(stderr, "Error, must be length 32");
+ return NULL;
+ }
+
+ k[0] &= 248;
+ k[31] &= 127;
+ k[31] |= 64;
+ return as_byte_array(env, k, 32);
+}
+
+JNIEXPORT jbyteArray JNICALL Java_Curve25519Donna_getPublic
+ (JNIEnv *env, jobject obj, jbyteArray privkey) {
+
+ int len;
+ unsigned char* private = as_unsigned_char_array(env, privkey, &len);
+
+ if (len != 32) {
+ fprintf(stderr, "Error, must be length 32");
+ return NULL;
+ }
+
+ unsigned char pubkey[32];
+ unsigned char basepoint[32] = {9};
+
+ curve25519_donna(pubkey, private, basepoint);
+ return as_byte_array(env, (unsigned char*)pubkey, 32);
+}
+
+JNIEXPORT jbyteArray JNICALL Java_Curve25519Donna_makeSharedSecret
+ (JNIEnv *env, jobject obj, jbyteArray privkey, jbyteArray their_pubkey) {
+
+ unsigned char shared_secret[32];
+
+ int l1, l2;
+ unsigned char* private = as_unsigned_char_array(env, privkey, &l1);
+ unsigned char* pubkey = as_unsigned_char_array(env, their_pubkey, &l2);
+
+ if ( !(l1 == 32 && l2 == 32) ) {
+ fprintf(stderr, "Error, must be length 32");
+ return NULL;
+ }
+
+ curve25519_donna(shared_secret, private, pubkey);
+ return as_byte_array(env, (unsigned char*)shared_secret, 32);
+}
+
+JNIEXPORT void JNICALL Java_Curve25519Donna_helowrld
+ (JNIEnv *env, jobject obj) {
+ printf("helowrld\n");
+}
diff --git a/contrib/Curve25519Donna.h b/contrib/Curve25519Donna.h
new file mode 100644
index 0000000..3cd4ca0
--- /dev/null
+++ b/contrib/Curve25519Donna.h
@@ -0,0 +1,53 @@
+/* DO NOT EDIT THIS FILE - it is machine generated */
+#include <jni.h>
+/* Header for class Curve25519Donna */
+
+#ifndef _Included_Curve25519Donna
+#define _Included_Curve25519Donna
+#ifdef __cplusplus
+extern "C" {
+#endif
+/*
+ * Class: Curve25519Donna
+ * Method: curve25519Donna
+ * Signature: ([B[B)[B
+ */
+JNIEXPORT jbyteArray JNICALL Java_Curve25519Donna_curve25519Donna
+ (JNIEnv *, jobject, jbyteArray, jbyteArray);
+
+/*
+ * Class: Curve25519Donna
+ * Method: makePrivate
+ * Signature: ([B)[B
+ */
+JNIEXPORT jbyteArray JNICALL Java_Curve25519Donna_makePrivate
+ (JNIEnv *, jobject, jbyteArray);
+
+/*
+ * Class: Curve25519Donna
+ * Method: getPublic
+ * Signature: ([B)[B
+ */
+JNIEXPORT jbyteArray JNICALL Java_Curve25519Donna_getPublic
+ (JNIEnv *, jobject, jbyteArray);
+
+/*
+ * Class: Curve25519Donna
+ * Method: makeSharedSecret
+ * Signature: ([B[B)[B
+ */
+JNIEXPORT jbyteArray JNICALL Java_Curve25519Donna_makeSharedSecret
+ (JNIEnv *, jobject, jbyteArray, jbyteArray);
+
+/*
+ * Class: Curve25519Donna
+ * Method: helowrld
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL Java_Curve25519Donna_helowrld
+ (JNIEnv *, jobject);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
diff --git a/contrib/Curve25519Donna.java b/contrib/Curve25519Donna.java
new file mode 100644
index 0000000..e28cb53
--- /dev/null
+++ b/contrib/Curve25519Donna.java
@@ -0,0 +1,77 @@
+/*
+ James Robson
+ Public domain.
+*/
+
+public class Curve25519Donna {
+
+ final protected static char[] hexArray = "0123456789ABCDEF".toCharArray();
+
+ public static String bytesToHex(byte[] bytes) {
+ char[] hexChars = new char[bytes.length * 2];
+ int v;
+ for ( int j = 0; j < bytes.length; j++ ) {
+ v = bytes[j] & 0xFF;
+ hexChars[j * 2] = hexArray[v >>> 4];
+ hexChars[j * 2 + 1] = hexArray[v & 0x0F];
+ }
+ return new String(hexChars);
+ }
+
+ public native byte[] curve25519Donna(byte[] a, byte[] b);
+ public native byte[] makePrivate(byte[] secret);
+ public native byte[] getPublic(byte[] privkey);
+ public native byte[] makeSharedSecret(byte[] privkey, byte[] theirPubKey);
+ public native void helowrld();
+
+ // Uncomment if your Java is 32-bit:
+ //static { System.loadLibrary("Curve25519Donna"); }
+
+ // Otherwise, load this 64-bit .jnilib:
+ static { System.loadLibrary("Curve25519Donna_64"); }
+
+ /*
+ To give the old tires a kick (OSX):
+ java -cp `pwd` Curve25519Donna
+ */
+ public static void main (String[] args) {
+
+ Curve25519Donna c = new Curve25519Donna();
+
+ // These should be 32 bytes long
+ byte[] user1Secret = "abcdefghijklmnopqrstuvwxyz123456".getBytes();
+ byte[] user2Secret = "654321zyxwvutsrqponmlkjihgfedcba".getBytes();
+
+
+ // You can use the curve function directly...
+
+ //byte[] o = c.curve25519Donna(a, b);
+ //System.out.println("o = " + bytesToHex(o));
+
+
+ // ... but it's not really necessary. Just use the following
+ // convenience methods:
+
+ byte[] privKey = c.makePrivate(user1Secret);
+ byte[] pubKey = c.getPublic(privKey);
+
+ byte[] privKey2 = c.makePrivate(user2Secret);
+ byte[] pubKey2 = c.getPublic(privKey2);
+
+ System.out.println("'user1' privKey = " + bytesToHex(privKey));
+ System.out.println("'user1' pubKey = " + bytesToHex(pubKey));
+ System.out.println("===================================================");
+
+ System.out.println("'user2' privKey = " + bytesToHex(privKey2));
+ System.out.println("'user2' pubKey = " + bytesToHex(pubKey2));
+ System.out.println("===================================================");
+
+
+ byte[] ss1 = c.makeSharedSecret(privKey, pubKey2);
+ System.out.println("'user1' computes shared secret: " + bytesToHex(ss1));
+
+ byte[] ss2 = c.makeSharedSecret(privKey2, pubKey);
+ System.out.println("'user2' computes shared secret: " + bytesToHex(ss2));
+
+ }
+}
diff --git a/contrib/make-snippets b/contrib/make-snippets
new file mode 100644
index 0000000..4568721
--- /dev/null
+++ b/contrib/make-snippets
@@ -0,0 +1,68 @@
+CFLAGS=-Wmissing-prototypes -Wdeclaration-after-statement -O2 -Wall
+CC=clang
+
+
+targets: curve25519-donna.a curve25519-donna-c64.a
+
+test: test-donna test-donna-c64
+
+
+clean:
+ rm -f java-src/*.class java-src/*.jnilib *.dylib *.o *.a *.pp test-curve25519-donna test-curve25519-donna-c64 speed-curve25519-donna speed-curve25519-donna-c64
+
+curve25519-donna.a: curve25519-donna.o
+ ar -rc curve25519-donna.a curve25519-donna.o
+ ranlib curve25519-donna.a
+
+
+##### OSX dynamic library (32- & 64-bit)
+
+curve25519donna.dylib: curve25519-donna.a curve25519-donna-c64.a
+ $(CC) -m32 -fpic -shared -Wl,-all_load curve25519-donna.a -Wl,-all_load -o libcurve25519donna.dylib
+ $(CC) -fpic -shared -Wl,-all_load curve25519-donna-c64.a -Wl,-all_load -o libcurve25519donna_64.dylib
+
+##### OSX/Java section hence
+
+# Java JNI - compiled for OSX (32- & 64-bit)
+Curve25519Donna.class:
+ cd java-src; javah -jni Curve25519Donna; cd ..
+ cd java-src; javac Curve25519Donna.java; cd ..
+
+Curve25519Donna.jnilib: curve25519-donna.a curve25519-donna-c64.a Curve25519Donna.class
+ @echo "Building 32-bit..."
+ clang -o java-src/libCurve25519Donna.jnilib $(CFLAGS) -lc -shared -m32 -I /System/Library/Frameworks/JavaVM.framework/Headers curve25519-donna.o java-src/Curve25519Donna.c
+ @echo "Building 64-bit..."
+ clang -o java-src/libCurve25519Donna_64.jnilib $(CFLAGS) -lc -shared -I /System/Library/Frameworks/JavaVM.framework/Headers curve25519-donna-c64.o java-src/Curve25519Donna.c
+
+##### OSX/Java section end
+
+curve25519-donna.o: curve25519-donna.c
+ $(CC) -c curve25519-donna.c $(CFLAGS) -m32
+
+curve25519-donna-c64.a: curve25519-donna-c64.o
+ ar -rc curve25519-donna-c64.a curve25519-donna-c64.o
+ ranlib curve25519-donna-c64.a
+
+curve25519-donna-c64.o: curve25519-donna-c64.c
+ $(CC) -c curve25519-donna-c64.c $(CFLAGS)
+
+test-donna: test-curve25519-donna
+ ./test-curve25519-donna | head -123456 | tail -1
+
+test-donna-c64: test-curve25519-donna-c64
+ ./test-curve25519-donna-c64 | head -123456 | tail -1
+
+test-curve25519-donna: test-curve25519.c curve25519-donna.a
+ $(CC) -o test-curve25519-donna test-curve25519.c curve25519-donna.a $(CFLAGS) -m32
+
+test-curve25519-donna-c64: test-curve25519.c curve25519-donna-c64.a
+ $(CC) -o test-curve25519-donna-c64 test-curve25519.c curve25519-donna-c64.a $(CFLAGS)
+
+speed-curve25519-donna: speed-curve25519.c curve25519-donna.a
+ $(CC) -o speed-curve25519-donna speed-curve25519.c curve25519-donna.a $(CFLAGS) -m32
+
+speed-curve25519-donna-c64: speed-curve25519.c curve25519-donna-c64.a
+ $(CC) -o speed-curve25519-donna-c64 speed-curve25519.c curve25519-donna-c64.a $(CFLAGS)
+
+test-sc-curve25519-donna-c64: test-sc-curve25519.c curve25519-donna-c64.a
+ $(CC) -o test-sc-curve25519-donna-c64 -O test-sc-curve25519.c curve25519-donna-c64.a test-sc-curve25519.s $(CFLAGS)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-05 03:33:16 +0000