The Android Open Source Project | adc854b | 2009-03-03 19:28:47 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2008 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | /* |
| 18 | * Native glue for Java class org.openssl.NativeBN |
| 19 | */ |
| 20 | |
| 21 | #include <jni.h> |
| 22 | #include <JNIHelp.h> |
| 23 | #include <openssl/err.h> |
| 24 | #include <openssl/crypto.h> |
| 25 | #include <openssl/bn.h> |
| 26 | #include <stdio.h> |
| 27 | |
| 28 | #define mcSignednessBull void * |
| 29 | #ifndef FALSE |
| 30 | #define FALSE 0 |
| 31 | #define TRUE 1 |
| 32 | #endif |
| 33 | |
| 34 | |
| 35 | static void |
| 36 | throwOutOfMemoryException(JNIEnv* env, const char* message) |
| 37 | { |
| 38 | jniThrowException(env, "java/lang/OutOfMemoryError", message); |
| 39 | } |
| 40 | |
| 41 | static void |
| 42 | throwNewNullPointerException (JNIEnv* env, const char* message) |
| 43 | { |
| 44 | jniThrowException(env, "java/lang/NullPointerException", message); |
| 45 | } |
| 46 | |
| 47 | static int isValidHandle (JNIEnv* env, void* handle, const char *message) |
| 48 | { |
| 49 | if (handle == NULL) { |
| 50 | throwNewNullPointerException(env, message); |
| 51 | return FALSE; |
| 52 | } |
| 53 | else return TRUE; |
| 54 | } |
| 55 | |
| 56 | static int oneValidHandle (JNIEnv* env, void* a) |
| 57 | { |
| 58 | return isValidHandle(env, a, "Mandatory handle (first) passed as null"); |
| 59 | } |
| 60 | |
| 61 | static int twoValidHandles (JNIEnv* env, void* a, void *b) |
| 62 | { |
| 63 | if (!oneValidHandle(env, a)) return FALSE; |
| 64 | return isValidHandle(env, b, "Mandatory handle (second) passed as null"); |
| 65 | } |
| 66 | |
| 67 | static int threeValidHandles (JNIEnv* env, void* a, void *b, void* c) |
| 68 | { |
| 69 | if (!twoValidHandles(env, a, b)) return FALSE; |
| 70 | return isValidHandle(env, c, "Mandatory handle (third) passed as null"); |
| 71 | } |
| 72 | |
| 73 | static int fourValidHandles (JNIEnv* env, void* a, void *b, void* c, void* d) |
| 74 | { |
| 75 | if (!threeValidHandles(env, a, b, c)) return FALSE; |
| 76 | return isValidHandle(env, d, "Mandatory handle (fourth) passed as null"); |
| 77 | } |
| 78 | |
| 79 | |
| 80 | /** |
| 81 | * public static native int ERR_get_error(); |
| 82 | */ |
| 83 | static unsigned long NativeBN_ERR_get_error(JNIEnv* env, jclass cls) { |
| 84 | unsigned long e = ERR_get_error(); |
| 85 | return e; |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * public static native String ERR_error_string(int); |
| 90 | */ |
| 91 | static jstring NativeBN_ERR_error_string(JNIEnv* env, jclass cls, unsigned long e) { |
| 92 | jstring returnJString = 0; |
| 93 | char* errStr; |
| 94 | errStr = ERR_error_string(e, NULL); |
| 95 | returnJString = ((*env)->NewStringUTF(env, (mcSignednessBull)errStr)); |
| 96 | return returnJString; |
| 97 | } |
| 98 | |
| 99 | |
| 100 | /** |
| 101 | * public static native int BN_CTX_new() |
| 102 | */ |
| 103 | static BN_CTX* NativeBN_BN_CTX_new(JNIEnv* env, jclass cls) { |
| 104 | return BN_CTX_new(); |
| 105 | } |
| 106 | |
| 107 | |
| 108 | /** |
| 109 | * public static native int BN_new() |
| 110 | */ |
| 111 | static BIGNUM* NativeBN_BN_new(JNIEnv* env, jclass cls) { |
| 112 | return BN_new(); |
| 113 | } |
| 114 | |
| 115 | /** |
| 116 | * public static native int BN_free() |
| 117 | */ |
| 118 | static void NativeBN_BN_free(JNIEnv* env, jclass cls, BIGNUM* a) { |
| 119 | if (!oneValidHandle(env, a)) return; |
| 120 | BN_free(a); |
| 121 | } |
| 122 | |
| 123 | |
| 124 | /** |
| 125 | * public static native int BN_cmp(int, int) |
| 126 | */ |
| 127 | static int NativeBN_BN_cmp(JNIEnv* env, jclass cls, BIGNUM* a, BIGNUM* b) { |
| 128 | if (!twoValidHandles(env, a, b)) return 1; |
| 129 | return BN_cmp(a, b); |
| 130 | } |
| 131 | |
| 132 | /** |
| 133 | * public static native int BN_copy(int, int) |
| 134 | */ |
| 135 | static jboolean NativeBN_BN_copy(JNIEnv* env, jclass cls, BIGNUM* to, BIGNUM* from) { |
| 136 | if (!twoValidHandles(env, to, from)) return FALSE; |
| 137 | return (BN_copy(to, from) != NULL); |
| 138 | } |
| 139 | |
| 140 | |
| 141 | /** |
| 142 | * public static native int putULongInt(int, long, int) |
| 143 | */ |
| 144 | static jboolean NativeBN_putULongInt(JNIEnv* env, jclass cls, BIGNUM* a, unsigned long long dw, jboolean neg) { |
| 145 | if (!oneValidHandle(env, a)) return FALSE; |
| 146 | unsigned int hi = dw >> 32; // This shifts without sign extension. |
| 147 | int lo = (int)dw; // This truncates implicitely. |
| 148 | |
| 149 | // cf. litEndInts2bn: |
| 150 | bn_check_top(a); |
| 151 | if (bn_wexpand(a, 2) != NULL) { |
| 152 | a->d[0] = lo; |
| 153 | a->d[1] = hi; |
| 154 | a->top = 2; |
| 155 | a->neg = neg; |
| 156 | bn_correct_top(a); |
| 157 | return TRUE; |
| 158 | } |
| 159 | else return FALSE; |
| 160 | } |
| 161 | |
| 162 | /** |
| 163 | * public static native int putLongInt(int, long) |
| 164 | */ |
| 165 | static jboolean NativeBN_putLongInt(JNIEnv* env, jclass cls, BIGNUM* a, long long dw) { |
| 166 | if (dw >= 0) return NativeBN_putULongInt(env, cls, a, dw, FALSE); |
| 167 | else return NativeBN_putULongInt(env, cls, a, -dw, TRUE); |
| 168 | } |
| 169 | |
| 170 | /** |
| 171 | * public static native int BN_dec2bn(int, java.lang.String) |
| 172 | */ |
| 173 | static int NativeBN_BN_dec2bn(JNIEnv* env, jclass cls, BIGNUM* a, jstring str) { |
| 174 | if (!oneValidHandle(env, a)) return -1; |
| 175 | char* tmpStr = (char*)(*env)->GetStringUTFChars(env, str, NULL); |
| 176 | if (tmpStr != NULL) { |
| 177 | int len = BN_dec2bn(&a, tmpStr); |
| 178 | (*env)->ReleaseStringUTFChars(env, str, tmpStr); |
| 179 | return len; // len == 0: Error |
| 180 | } |
| 181 | else return -1; // Error outside BN. |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * public static native int BN_hex2bn(int, java.lang.String) |
| 186 | */ |
| 187 | static int NativeBN_BN_hex2bn(JNIEnv* env, jclass cls, BIGNUM* a, jstring str) { |
| 188 | if (!oneValidHandle(env, a)) return -1; |
| 189 | char* tmpStr = (char*)(*env)->GetStringUTFChars(env, str, NULL); |
| 190 | if (tmpStr != NULL) { |
| 191 | int len = BN_hex2bn(&a, tmpStr); |
| 192 | (*env)->ReleaseStringUTFChars(env, str, tmpStr); |
| 193 | return len; // len == 0: Error |
| 194 | } |
| 195 | else return -1; // Error outside BN. |
| 196 | } |
| 197 | |
| 198 | /** |
| 199 | * public static native boolean BN_bin2bn(byte[], int, int, int) |
| 200 | */ |
| 201 | static jboolean NativeBN_BN_bin2bn(JNIEnv* env, jclass cls, jbyteArray arr, int len, jboolean neg, BIGNUM* ret) { |
| 202 | if (!oneValidHandle(env, ret)) return FALSE; |
| 203 | jboolean success; |
| 204 | unsigned char * tmpBytes; |
| 205 | tmpBytes = (unsigned char *)((*env)->GetPrimitiveArrayCritical(env, arr, 0)); |
| 206 | if (tmpBytes != NULL) { |
| 207 | success = (BN_bin2bn(tmpBytes, len, ret) != NULL); |
| 208 | if (neg) { |
| 209 | BN_set_negative(ret, 1); |
| 210 | } |
| 211 | (*env)->ReleasePrimitiveArrayCritical(env, arr, tmpBytes, JNI_ABORT); |
| 212 | return success; |
| 213 | } |
| 214 | else return -1; // Error outside BN. mc FIXME: what to do in this case? Does JNI throw exception itself? |
| 215 | } |
| 216 | |
| 217 | /** |
| 218 | * public static native boolean litEndInts2bn(int[], int, int, int) |
| 219 | * Note: |
| 220 | * This procedure directly writes the internal representation of BIGNUMs. |
| 221 | * We do so as there is no direct interface based on Little Endian Integer Arrays. |
| 222 | * Also note that the same representation is used in the Cordoba Java Implementation of BigIntegers, |
| 223 | * whereof certain functionality is still being used. |
| 224 | */ |
| 225 | static jboolean NativeBN_litEndInts2bn(JNIEnv* env, jclass cls, jintArray arr, int len, jboolean neg, BIGNUM* ret) { |
| 226 | if (!oneValidHandle(env, ret)) return FALSE; |
| 227 | bn_check_top(ret); |
| 228 | if (len > 0) { |
| 229 | BN_ULONG* tmpInts; // BN_ULONG is 4 Bytes on this system for sure, i.e. same as jint! |
| 230 | tmpInts = (BN_ULONG*)((*env)->GetPrimitiveArrayCritical(env, arr, 0)); |
| 231 | if ((tmpInts != NULL) && (bn_wexpand(ret, len) != NULL)) { |
| 232 | int i = len; do { i--; ret->d[i] = tmpInts[i]; } while (i > 0); |
| 233 | (*env)->ReleasePrimitiveArrayCritical(env, arr, tmpInts, JNI_ABORT); |
| 234 | ret->top = len; |
| 235 | ret->neg = neg; |
| 236 | // need to call this due to clear byte at top if avoiding |
| 237 | // having the top bit set (-ve number) |
| 238 | // Basically get rid of top zero ints: |
| 239 | bn_correct_top(ret); |
| 240 | return TRUE; |
| 241 | } |
| 242 | else { |
| 243 | if (tmpInts != NULL) |
| 244 | (*env)->ReleasePrimitiveArrayCritical(env, arr, tmpInts, JNI_ABORT); |
| 245 | return FALSE; |
| 246 | } |
| 247 | } |
| 248 | else { // (len = 0) means value = 0 and sign will be 0, too. |
| 249 | ret->top = 0; |
| 250 | return TRUE; |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | |
| 255 | #define BYTES2INT(bytes, k) \ |
| 256 | ( (bytes[k + 3] & 0xFF) \ |
| 257 | | (bytes[k + 2] & 0xFF) << 8 \ |
| 258 | | (bytes[k + 1] & 0xFF) << 16 \ |
| 259 | | (bytes[k + 0] & 0xFF) << 24 ) |
| 260 | |
| 261 | static jboolean negBigEndianBytes2bn(JNIEnv* env, jclass cls, unsigned char* bytes, int bytesLen, BIGNUM* ret) { |
| 262 | // We rely on: (BN_BITS2 == 32), i.e. BN_ULONG is unsigned int and has 4 bytes: |
| 263 | // |
| 264 | bn_check_top(ret); |
| 265 | // FIXME: ASSERT (bytesLen > 0); |
| 266 | int intLen = (bytesLen + 3) / 4; |
| 267 | int firstNonzeroDigit = -2; |
| 268 | if (bn_wexpand(ret, intLen) != NULL) { |
| 269 | BN_ULONG* d = ret->d; |
| 270 | BN_ULONG di; |
| 271 | ret->top = intLen; |
| 272 | int highBytes = bytesLen % 4; |
| 273 | int k = bytesLen; |
| 274 | // Put bytes to the int array starting from the end of the byte array |
| 275 | int i = 0; |
| 276 | while (k > highBytes) { |
| 277 | k -= 4; |
| 278 | di = BYTES2INT(bytes, k); |
| 279 | if (di != 0) { |
| 280 | d[i] = -di; |
| 281 | firstNonzeroDigit = i; |
| 282 | i++; |
| 283 | while (k > highBytes) { |
| 284 | k -= 4; |
| 285 | d[i] = ~BYTES2INT(bytes, k); |
| 286 | i++; |
| 287 | } |
| 288 | break; |
| 289 | } else { |
| 290 | d[i] = 0; |
| 291 | i++; |
| 292 | } |
| 293 | } |
| 294 | if (highBytes != 0) { |
| 295 | di = -1; |
| 296 | // Put the first bytes in the highest element of the int array |
| 297 | if (firstNonzeroDigit != -2) { |
| 298 | for (k = 0; k < highBytes; k++) { |
| 299 | di = (di << 8) | (bytes[k] & 0xFF); |
| 300 | } |
| 301 | d[i] = ~di; |
| 302 | } else { |
| 303 | for (k = 0; k < highBytes; k++) { |
| 304 | di = (di << 8) | (bytes[k] & 0xFF); |
| 305 | } |
| 306 | d[i] = -di; |
| 307 | } |
| 308 | } |
| 309 | return TRUE; |
| 310 | } |
| 311 | else return FALSE; |
| 312 | } |
| 313 | |
| 314 | /** |
| 315 | * public static native boolean twosComp2bn(byte[], int, int) |
| 316 | */ |
| 317 | static jboolean NativeBN_twosComp2bn(JNIEnv* env, jclass cls, jbyteArray arr, int bytesLen, BIGNUM* ret) { |
| 318 | if (!oneValidHandle(env, ret)) return FALSE; |
| 319 | jboolean success; |
| 320 | unsigned char* tmpBytes; |
| 321 | tmpBytes = (unsigned char*)((*env)->GetPrimitiveArrayCritical(env, arr, 0)); |
| 322 | if (tmpBytes != NULL) { |
| 323 | if ((tmpBytes[0] & 0X80) == 0) { // Positive value! |
| 324 | // |
| 325 | // We can use the existing BN implementation for unsigned big endian bytes: |
| 326 | // |
| 327 | success = (BN_bin2bn(tmpBytes, bytesLen, ret) != NULL); |
| 328 | BN_set_negative(ret, FALSE); |
| 329 | } |
| 330 | else { // Negative value! |
| 331 | // |
| 332 | // We need to apply two's complement: |
| 333 | // |
| 334 | success = negBigEndianBytes2bn(env, cls, tmpBytes, bytesLen, ret); |
| 335 | BN_set_negative(ret, TRUE); |
| 336 | } |
| 337 | (*env)->ReleasePrimitiveArrayCritical(env, arr, tmpBytes, JNI_ABORT); |
| 338 | return success; |
| 339 | } |
| 340 | else return -1; // Error outside BN. mc FIXME: what to do in this case? Does JNI throw exception itself? |
| 341 | } |
| 342 | |
| 343 | |
| 344 | /** |
| 345 | * public static native long longInt(int) |
| 346 | */ |
| 347 | static long long NativeBN_longInt(JNIEnv* env, jclass cls, BIGNUM* a) { |
| 348 | if (!oneValidHandle(env, a)) return -1; |
| 349 | bn_check_top(a); |
| 350 | int intLen = a->top; |
| 351 | BN_ULONG* d = a->d; |
| 352 | switch (intLen) { |
| 353 | case 0: |
| 354 | return 0; |
| 355 | case 1: |
| 356 | if (!a->neg) return d[0] & 0X00000000FFFFFFFFLL; |
| 357 | else return -(d[0] & 0X00000000FFFFFFFFLL); |
| 358 | default: |
| 359 | if (!a->neg) return ((long long)d[1] << 32) | (d[0] & 0XFFFFFFFFLL); |
| 360 | else return -(((long long)d[1] << 32) | (d[0] & 0XFFFFFFFFLL)); |
| 361 | } |
| 362 | } |
| 363 | |
| 364 | |
| 365 | static char* leadingZerosTrimmed(char* s) { |
| 366 | char* p = s; |
| 367 | if (*p == '-') { |
| 368 | p++; |
| 369 | while ((*p == '0') && (*(p + 1) != 0)) { p++; } |
| 370 | p--; |
| 371 | *p = '-'; |
| 372 | } else { |
| 373 | while ((*p == '0') && (*(p + 1) != 0)) { p++; } |
| 374 | } |
| 375 | return p; |
| 376 | } |
| 377 | |
| 378 | /** |
| 379 | * public static native java.lang.String BN_bn2dec(int) |
| 380 | */ |
| 381 | static jstring NativeBN_BN_bn2dec(JNIEnv* env, jclass cls, BIGNUM* a) { |
| 382 | if (!oneValidHandle(env, a)) return NULL; |
| 383 | char* tmpStr; |
| 384 | char* retStr; |
| 385 | tmpStr = BN_bn2dec(a); |
| 386 | if (tmpStr != NULL) { |
| 387 | retStr = leadingZerosTrimmed(tmpStr); |
| 388 | jstring returnJString = ((*env)->NewStringUTF(env, (mcSignednessBull)retStr)); |
| 389 | OPENSSL_free(tmpStr); |
| 390 | return returnJString; |
| 391 | } |
| 392 | else return NULL; |
| 393 | } |
| 394 | |
| 395 | /** |
| 396 | * public static native java.lang.String BN_bn2hex(int) |
| 397 | */ |
| 398 | static jstring NativeBN_BN_bn2hex(JNIEnv* env, jclass cls, BIGNUM* a) { |
| 399 | if (!oneValidHandle(env, a)) return NULL; |
| 400 | char* tmpStr; |
| 401 | char* retStr; |
| 402 | tmpStr = BN_bn2hex(a); |
| 403 | if (tmpStr != NULL) { |
| 404 | retStr = leadingZerosTrimmed(tmpStr); |
| 405 | jstring returnJString = ((*env)->NewStringUTF(env, (mcSignednessBull)retStr)); |
| 406 | OPENSSL_free(tmpStr); |
| 407 | return returnJString; |
| 408 | } |
| 409 | else return NULL; |
| 410 | } |
| 411 | |
| 412 | /** |
| 413 | * public static native byte[] BN_bn2bin(int, byte[]) |
| 414 | */ |
| 415 | static jbyteArray NativeBN_BN_bn2bin(JNIEnv* env, jclass cls, BIGNUM* a, jbyteArray to) { |
| 416 | if (!oneValidHandle(env, a)) return NULL; |
| 417 | jbyteArray returnJBytes = to; |
| 418 | unsigned char * tmpBytes; |
| 419 | int len, byteCnt; |
| 420 | byteCnt = BN_num_bytes(a); |
| 421 | // FIXME: Currently ignoring array passed in to: |
| 422 | returnJBytes = (*env)->NewByteArray(env, byteCnt); |
| 423 | // FIXME: is it neccessary to check for returnJBytes != NULL? |
| 424 | tmpBytes = (unsigned char *)((*env)->GetPrimitiveArrayCritical(env, returnJBytes, NULL)); |
| 425 | if (tmpBytes != NULL) { |
| 426 | len = BN_bn2bin(a, tmpBytes); |
| 427 | (*env)->ReleasePrimitiveArrayCritical(env, returnJBytes, tmpBytes, 0); |
| 428 | return returnJBytes; |
| 429 | } |
| 430 | else return NULL; |
| 431 | } |
| 432 | |
| 433 | /** |
| 434 | * public static native int[] bn2litEndInts(int, int[]) |
| 435 | * cf. litEndInts2bn |
| 436 | */ |
| 437 | static jintArray NativeBN_bn2litEndInts(JNIEnv* env, jclass cls, BIGNUM* a, jintArray to) { |
| 438 | if (!oneValidHandle(env, a)) return NULL; |
| 439 | jintArray returnJInts = to; |
| 440 | bn_check_top(a); |
| 441 | int len = a->top; |
| 442 | if (len > 0) { |
| 443 | // FIXME: Currently ignoring array passed in to: |
| 444 | returnJInts = (*env)->NewIntArray(env, len); |
| 445 | // FIXME: is it neccessary to check for returnJBytes != NULL? |
| 446 | BN_ULONG* tmpInts = (BN_ULONG*)((*env)->GetPrimitiveArrayCritical(env, returnJInts, NULL)); |
| 447 | if (tmpInts != NULL) { |
| 448 | int i = len; do { i--; tmpInts[i] = a->d[i]; } while (i > 0); |
| 449 | (*env)->ReleasePrimitiveArrayCritical(env, returnJInts, tmpInts, 0); |
| 450 | return returnJInts; |
| 451 | } |
| 452 | else return NULL; |
| 453 | } |
| 454 | else { // value = 0 |
| 455 | return NULL; // Client should not call when sign = 0! |
| 456 | } |
| 457 | } |
| 458 | |
| 459 | /** |
| 460 | * public static native byte[] bn2twosComp(int, byte[]) |
| 461 | */ |
| 462 | static jbyteArray NativeBN_bn2twosComp(JNIEnv* env, jclass cls, BIGNUM* a, jbyteArray to) { |
| 463 | if (!oneValidHandle(env, a)) return NULL; |
| 464 | jbyteArray returnJBytes = to; |
| 465 | unsigned char * tmpBytes; |
| 466 | int len, byteCnt; |
| 467 | byteCnt = BN_num_bytes(a); |
| 468 | // FIXME: Currently ignoring array passed in to: |
| 469 | returnJBytes = (*env)->NewByteArray(env, byteCnt); |
| 470 | // FIXME: is it neccessary to check for returnJBytes != NULL? |
| 471 | tmpBytes = (unsigned char *)((*env)->GetPrimitiveArrayCritical(env, returnJBytes, NULL)); |
| 472 | if (tmpBytes != NULL) { |
| 473 | len = BN_bn2bin(a, tmpBytes); |
| 474 | (*env)->ReleasePrimitiveArrayCritical(env, returnJBytes, tmpBytes, 0); |
| 475 | return returnJBytes; |
| 476 | } |
| 477 | else return NULL; |
| 478 | } |
| 479 | |
| 480 | |
| 481 | /** |
| 482 | * public static native int sign(int) |
| 483 | */ |
| 484 | static int NativeBN_sign(JNIEnv* env, jclass cls, BIGNUM* a) { |
| 485 | if (!oneValidHandle(env, a)) return -2; |
| 486 | if (BN_is_zero(a)) return 0; |
| 487 | else if (BN_is_negative(a)) return -1; |
| 488 | else return 1; |
| 489 | } |
| 490 | |
| 491 | /** |
| 492 | * public static native void BN_set_negative(int, int) |
| 493 | */ |
| 494 | static void NativeBN_BN_set_negative(JNIEnv* env, jclass cls, BIGNUM* b, int n) { |
| 495 | if (!oneValidHandle(env, b)) return; |
| 496 | BN_set_negative(b, n); |
| 497 | } |
| 498 | |
| 499 | |
| 500 | /** |
| 501 | * public static native int twosCompFitsIntoBytes(int, int) |
| 502 | */ |
| 503 | static jboolean NativeBN_twosCompFitsIntoBytes(JNIEnv* env, jclass cls, BIGNUM* a, int byteCnt) { |
| 504 | // byteCnt IN {1, 2, 4, 8, 12, 16, ... (k * 4)} |
| 505 | // We rely on: (BN_BITS2 == 32), i.e. BN_ULONG is unsigned int and has 4 bytes: |
| 506 | // |
| 507 | // LOGD("NativeBN_twosCompFitsIntoBytes"); |
| 508 | if (!oneValidHandle(env, a)) return FALSE; |
| 509 | bn_check_top(a); |
| 510 | int intLen = a->top; |
| 511 | BN_ULONG* d = a->d; |
| 512 | BN_ULONG msd; // most significant digit |
| 513 | switch (byteCnt) { |
| 514 | case 1: |
| 515 | if (intLen > 1) return FALSE; |
| 516 | else if (intLen == 0) return TRUE; |
| 517 | msd = d[0]; |
| 518 | if (a->neg) msd--; |
| 519 | return ((msd & 0XFFFFFF80) == 0); |
| 520 | case 2: |
| 521 | if (intLen > 1) return FALSE; |
| 522 | else if (intLen == 0) return TRUE; |
| 523 | msd = d[0]; |
| 524 | if (a->neg) msd--; |
| 525 | return ((msd & 0XFFFF8000) == 0); |
| 526 | case 4: |
| 527 | if (intLen > 1) return FALSE; |
| 528 | else if (intLen == 0) return TRUE; |
| 529 | msd = d[0]; |
| 530 | if (a->neg) msd--; |
| 531 | return ((msd & 0X80000000) == 0); |
| 532 | case 8: |
| 533 | if (intLen > 2) return FALSE; |
| 534 | else if (intLen == 0) return TRUE; |
| 535 | msd = d[1]; |
| 536 | if ((a->neg) && (d[0]) == 0) msd--; |
| 537 | return ((msd & 0X80000000) == 0); |
| 538 | default: |
| 539 | if (intLen > byteCnt / 4) return FALSE; |
| 540 | else if (intLen == 0) return TRUE; |
| 541 | int i = intLen - 1; |
| 542 | msd = d[i]; |
| 543 | if (a->neg) { |
| 544 | // Handle negative values correctly: |
| 545 | // i.e. decrement the msd if all other digits are 0: |
| 546 | do { i--; } while (!((i < 0) || (d[i] != 0))); |
| 547 | if (i < 0) msd--; // Only if all lower significant digits are 0 we decrement the most significant one. |
| 548 | } |
| 549 | return ((msd & 0X80000000) == 0); |
| 550 | } |
| 551 | } |
| 552 | |
| 553 | /** |
| 554 | * public static native int bitLength(int) |
| 555 | */ |
| 556 | static int NativeBN_bitLength(JNIEnv* env, jclass cls, BIGNUM* a) { |
| 557 | // We rely on: (BN_BITS2 == 32), i.e. BN_ULONG is unsigned int and has 4 bytes: |
| 558 | // |
| 559 | if (!oneValidHandle(env, a)) return FALSE; |
| 560 | bn_check_top(a); |
| 561 | int intLen = a->top; |
| 562 | if (intLen == 0) return 0; |
| 563 | BN_ULONG* d = a->d; |
| 564 | int i = intLen - 1; |
| 565 | BN_ULONG msd = d[i]; // most significant digit |
| 566 | if (a->neg) { |
| 567 | // Handle negative values correctly: |
| 568 | // i.e. decrement the msd if all other digits are 0: |
| 569 | // while ((i > 0) && (d[i] != 0)) { i--; } |
| 570 | do { i--; } while (!((i < 0) || (d[i] != 0))); |
| 571 | if (i < 0) msd--; // Only if all lower significant digits are 0 we decrement the most significant one. |
| 572 | } |
| 573 | return (intLen - 1) * 32 + BN_num_bits_word(msd); |
| 574 | } |
| 575 | |
| 576 | /** |
| 577 | * public static native int BN_num_bits(int) |
| 578 | */ |
| 579 | // static int NativeBN_BN_num_bits(JNIEnv* env, jclass cls, BIGNUM* a) { |
| 580 | // LOGD("NativeBN_BN_num_bits"); |
| 581 | // if (!oneValidHandle(env, a)) return FALSE; |
| 582 | // return BN_num_bits(a); |
| 583 | // } |
| 584 | |
| 585 | /** |
| 586 | * public static native boolean BN_is_bit_set(int, int) |
| 587 | */ |
| 588 | static jboolean NativeBN_BN_is_bit_set(JNIEnv* env, jclass cls, BIGNUM* a, int n) { |
| 589 | if (!oneValidHandle(env, a)) return FALSE; |
| 590 | return (jboolean)BN_is_bit_set(a, n); |
| 591 | } |
| 592 | |
| 593 | /** |
| 594 | * public static native void modifyBit(int, int, int) |
| 595 | */ |
| 596 | static jboolean NativeBN_modifyBit(JNIEnv* env, jclass cls, BIGNUM* a, int n, int op) { |
| 597 | // LOGD("NativeBN_BN_modifyBit"); |
| 598 | if (!oneValidHandle(env, a)) return FALSE; |
| 599 | switch (op) { |
| 600 | case 1: return BN_set_bit(a, n); |
| 601 | case 0: return BN_clear_bit(a, n); |
| 602 | case -1: |
| 603 | if (BN_is_bit_set(a, n)) return BN_clear_bit(a, n); |
| 604 | else return BN_set_bit(a, n); |
| 605 | } |
| 606 | return FALSE; |
| 607 | } |
| 608 | |
| 609 | /** |
| 610 | * public static native int BN_lshift(int, int, int) |
| 611 | */ |
| 612 | static jboolean NativeBN_BN_lshift(JNIEnv* env, jclass cls, BIGNUM* r, BIGNUM* a, int n) { |
| 613 | // LOGD("NativeBN_BN_lshift %p %p %d", r, a, n); |
| 614 | if (!twoValidHandles(env, r, a)) return FALSE; |
| 615 | if (n >= 0) return BN_lshift(r, a, n); |
| 616 | |
| 617 | n = -n; |
| 618 | // return BN_rshift(r, a, n); |
| 619 | // Following code insourced from bn_shift.c in order to have bug fixed: |
| 620 | // FIXME: Should report to openssl team!!! |
| 621 | |
| 622 | int i,j,nw,lb,rb; |
| 623 | BN_ULONG *t,*f; |
| 624 | BN_ULONG l,tmp; |
| 625 | |
| 626 | bn_check_top(r); |
| 627 | bn_check_top(a); |
| 628 | |
| 629 | nw=n/BN_BITS2; |
| 630 | rb=n%BN_BITS2; |
| 631 | lb=BN_BITS2-rb; |
| 632 | // Changed "nw > a->top || a->top == 0" to nw >= a->top" as considering this a bug: |
| 633 | if (nw >= a->top) |
| 634 | { |
| 635 | BN_zero(r); |
| 636 | return(1); |
| 637 | } |
| 638 | if (r != a) |
| 639 | { |
| 640 | r->neg=a->neg; |
| 641 | if (bn_wexpand(r,a->top-nw+1) == NULL) return(0); |
| 642 | } |
| 643 | else |
| 644 | { |
| 645 | if (n == 0) |
| 646 | return 1; /* or the copying loop will go berserk */ |
| 647 | } |
| 648 | |
| 649 | f= &(a->d[nw]); |
| 650 | t=r->d; |
| 651 | j=a->top-nw; |
| 652 | r->top=j; |
| 653 | |
| 654 | if (rb == 0) |
| 655 | { |
| 656 | for (i=j; i != 0; i--) |
| 657 | *(t++)= *(f++); |
| 658 | } |
| 659 | else |
| 660 | { |
| 661 | l= *(f++); |
| 662 | for (i=j-1; i != 0; i--) |
| 663 | { |
| 664 | tmp =(l>>rb)&BN_MASK2; |
| 665 | l= *(f++); |
| 666 | *(t++) =(tmp|(l<<lb))&BN_MASK2; |
| 667 | } |
| 668 | *(t++) =(l>>rb)&BN_MASK2; |
| 669 | } |
| 670 | bn_correct_top(r); |
| 671 | bn_check_top(r); |
| 672 | return(1); |
| 673 | } |
| 674 | |
| 675 | |
| 676 | /** |
| 677 | * public static native boolean BN_add_word(int, int) |
| 678 | */ |
| 679 | static jboolean NativeBN_BN_add_word(JNIEnv* env, jclass cls, BIGNUM *a, BN_ULONG w) { |
| 680 | if (!oneValidHandle(env, a)) return FALSE; |
| 681 | return BN_add_word(a, w); |
| 682 | } |
| 683 | |
| 684 | /** |
| 685 | * public static native boolean BN_sub_word(int, int) |
| 686 | */ |
| 687 | static jboolean NativeBN_BN_sub_word(JNIEnv* env, jclass cls, BIGNUM *a, BN_ULONG w) { |
| 688 | if (!oneValidHandle(env, a)) return FALSE; |
| 689 | return BN_sub_word(a, w); |
| 690 | } |
| 691 | |
| 692 | /** |
| 693 | * public static native boolean BN_mul_word(int, int) |
| 694 | */ |
| 695 | static jboolean NativeBN_BN_mul_word(JNIEnv* env, jclass cls, BIGNUM *a, BN_ULONG w) { |
| 696 | if (!oneValidHandle(env, a)) return FALSE; |
| 697 | return BN_mul_word(a, w); |
| 698 | } |
| 699 | |
| 700 | /** |
| 701 | * public static native boolean BN_div_word(int, int) |
| 702 | */ |
| 703 | static BN_ULONG NativeBN_BN_div_word(JNIEnv* env, jclass cls, BIGNUM *a, BN_ULONG w) { |
| 704 | if (!oneValidHandle(env, a)) return FALSE; |
| 705 | return BN_div_word(a, w); |
| 706 | } |
| 707 | |
| 708 | /** |
| 709 | * public static native boolean BN_mod_word(int, int) |
| 710 | */ |
| 711 | static BN_ULONG NativeBN_BN_mod_word(JNIEnv* env, jclass cls, BIGNUM *a, BN_ULONG w) { |
| 712 | if (!oneValidHandle(env, a)) return FALSE; |
| 713 | return BN_mod_word(a, w); |
| 714 | } |
| 715 | |
| 716 | |
| 717 | |
| 718 | /** |
| 719 | * public static native int BN_add(int, int, int) |
| 720 | */ |
| 721 | static jboolean NativeBN_BN_add(JNIEnv* env, jclass cls, BIGNUM* r, BIGNUM* a, BIGNUM* b) { |
| 722 | if (!threeValidHandles(env, r, a, b)) return FALSE; |
| 723 | return BN_add(r, a, b); |
| 724 | } |
| 725 | |
| 726 | /** |
| 727 | * public static native int BN_sub(int, int, int) |
| 728 | */ |
| 729 | static jboolean NativeBN_BN_sub(JNIEnv* env, jclass cls, BIGNUM* r, BIGNUM* a, BIGNUM* b) { |
| 730 | if (!threeValidHandles(env, r, a, b)) return FALSE; |
| 731 | return BN_sub(r, a, b); |
| 732 | } |
| 733 | |
| 734 | |
| 735 | /** |
| 736 | * public static native int BN_gcd(int, int, int, int) |
| 737 | */ |
| 738 | static jboolean NativeBN_BN_gcd(JNIEnv* env, jclass cls, BIGNUM* r, BIGNUM* a, BIGNUM* b, BN_CTX* ctx) { |
| 739 | if (!threeValidHandles(env, r, a, b)) return FALSE; |
| 740 | return BN_gcd(r, a, b, ctx); |
| 741 | } |
| 742 | |
| 743 | /** |
| 744 | * public static native int BN_mul(int, int, int, int) |
| 745 | */ |
| 746 | static jboolean NativeBN_BN_mul(JNIEnv* env, jclass cls, BIGNUM* r, BIGNUM* a, BIGNUM* b, BN_CTX* ctx) { |
| 747 | if (!threeValidHandles(env, r, a, b)) return FALSE; |
| 748 | return BN_mul(r, a, b, ctx); |
| 749 | } |
| 750 | |
| 751 | /** |
| 752 | * public static native int BN_exp(int, int, int, int) |
| 753 | */ |
| 754 | static jboolean NativeBN_BN_exp(JNIEnv* env, jclass cls, BIGNUM* r, BIGNUM* a, BIGNUM* p, BN_CTX* ctx) { |
| 755 | if (!threeValidHandles(env, r, a, p)) return FALSE; |
| 756 | return BN_exp(r, a, p, ctx); |
| 757 | } |
| 758 | |
| 759 | /** |
| 760 | * public static native boolean BN_div(int, int, int, int, int) |
| 761 | */ |
| 762 | static jboolean NativeBN_BN_div(JNIEnv* env, jclass cls, BIGNUM* dv, BIGNUM* rem, BIGNUM* m, BIGNUM* d, BN_CTX* ctx) { |
| 763 | if (!fourValidHandles(env, (rem ? rem : dv), (dv ? dv : rem), m, d)) return FALSE; |
| 764 | return BN_div(dv, rem, m, d, ctx); |
| 765 | } |
| 766 | |
| 767 | /** |
| 768 | * public static native int BN_nnmod(int, int, int, int) |
| 769 | */ |
| 770 | static jboolean NativeBN_BN_nnmod(JNIEnv* env, jclass cls, BIGNUM* r, BIGNUM* a, BIGNUM* m, BN_CTX* ctx) { |
| 771 | if (!threeValidHandles(env, r, a, m)) return FALSE; |
| 772 | return BN_nnmod(r, a, m, ctx); |
| 773 | } |
| 774 | |
| 775 | /** |
| 776 | * public static native int BN_mod_exp(int, int, int, int, int) |
| 777 | */ |
| 778 | static jboolean NativeBN_BN_mod_exp(JNIEnv* env, jclass cls, BIGNUM* r, BIGNUM* a, BIGNUM* p, BIGNUM* m, BN_CTX* ctx) { |
| 779 | if (!fourValidHandles(env, r, a, p, m)) return FALSE; |
| 780 | return BN_mod_exp(r, a, p, m, ctx); |
| 781 | } |
| 782 | |
| 783 | |
| 784 | /** |
| 785 | * public static native int BN_mod_inverse(int, int, int, int) |
| 786 | */ |
| 787 | static jboolean NativeBN_BN_mod_inverse(JNIEnv* env, jclass cls, BIGNUM* ret, BIGNUM* a, BIGNUM* n, BN_CTX* ctx) { |
| 788 | if (!threeValidHandles(env, ret, a, n)) return FALSE; |
| 789 | return (BN_mod_inverse(ret, a, n, ctx) != NULL); |
| 790 | } |
| 791 | |
| 792 | |
| 793 | /** |
| 794 | * public static native int BN_generate_prime_ex(int, int, boolean, int, int, int) |
| 795 | */ |
| 796 | static jboolean NativeBN_BN_generate_prime_ex(JNIEnv* env, jclass cls, BIGNUM* ret, int bits, jboolean safe, |
| 797 | BIGNUM* add, BIGNUM* rem, jint cb) { |
| 798 | if (!oneValidHandle(env, ret)) return FALSE; |
| 799 | return BN_generate_prime_ex(ret, bits, safe, add, rem, cb); |
| 800 | } |
| 801 | |
| 802 | /** |
| 803 | * public static native int BN_mod_inverse(int, int, int, int) |
| 804 | */ |
| 805 | static jboolean NativeBN_BN_is_prime_ex(JNIEnv* env, jclass cls, BIGNUM* p, int nchecks, BN_CTX* ctx, jint cb) { |
| 806 | if (!oneValidHandle(env, p)) return FALSE; |
| 807 | return BN_is_prime_ex(p, nchecks, ctx, cb); |
| 808 | } |
| 809 | |
| 810 | |
| 811 | /** |
| 812 | * Defines the mapping from Java methods and their signatures |
| 813 | * to native functions. Order is Java name, Java signature, |
| 814 | * then pointer to C function. |
| 815 | */ |
| 816 | static JNINativeMethod METHODS[] = { |
| 817 | { "ERR_get_error", "()I", (void*)NativeBN_ERR_get_error }, |
| 818 | { "ERR_error_string", "(I)Ljava/lang/String;", (void*)NativeBN_ERR_error_string }, |
| 819 | { "BN_CTX_new", "()I", (void*)NativeBN_BN_CTX_new }, |
| 820 | { "BN_new", "()I", (void*)NativeBN_BN_new }, |
| 821 | { "BN_free", "(I)V", (void*)NativeBN_BN_free }, |
| 822 | { "BN_cmp", "(II)I", (void*)NativeBN_BN_cmp }, |
| 823 | { "BN_copy", "(II)Z", (void*)NativeBN_BN_copy }, |
| 824 | { "putLongInt", "(IJ)Z", (void*)NativeBN_putLongInt }, |
| 825 | { "putULongInt", "(IJZ)Z", (void*)NativeBN_putULongInt }, |
| 826 | { "BN_dec2bn", "(ILjava/lang/String;)I", (void*)NativeBN_BN_dec2bn }, |
| 827 | { "BN_hex2bn", "(ILjava/lang/String;)I", (void*)NativeBN_BN_hex2bn }, |
| 828 | { "BN_bin2bn", "([BIZI)Z", (void*)NativeBN_BN_bin2bn }, |
| 829 | { "litEndInts2bn", "([IIZI)Z", (void*)NativeBN_litEndInts2bn }, |
| 830 | { "twosComp2bn", "([BII)Z", (void*)NativeBN_twosComp2bn }, |
| 831 | { "longInt", "(I)J", (void*)NativeBN_longInt }, |
| 832 | { "BN_bn2dec", "(I)Ljava/lang/String;", (void*)NativeBN_BN_bn2dec }, |
| 833 | { "BN_bn2hex", "(I)Ljava/lang/String;", (void*)NativeBN_BN_bn2hex }, |
| 834 | { "BN_bn2bin", "(I[B)[B", (void*)NativeBN_BN_bn2bin }, |
| 835 | { "bn2litEndInts", "(I[I)[I", (void*)NativeBN_bn2litEndInts }, |
| 836 | { "bn2twosComp", "(I[B)[B", (void*)NativeBN_bn2twosComp }, |
| 837 | { "sign", "(I)I", (void*)NativeBN_sign }, |
| 838 | { "BN_set_negative", "(II)V", (void*)NativeBN_BN_set_negative }, |
| 839 | { "twosCompFitsIntoBytes", "(II)Z", (void*)NativeBN_twosCompFitsIntoBytes }, |
| 840 | { "bitLength", "(I)I", (void*)NativeBN_bitLength }, |
| 841 | // { "BN_num_bits", "(I)I", (void*)NativeBN_BN_num_bits }, |
| 842 | { "BN_is_bit_set", "(II)Z", (void*)NativeBN_BN_is_bit_set }, |
| 843 | { "modifyBit", "(III)Z", (void*)NativeBN_modifyBit }, |
| 844 | { "BN_lshift", "(III)Z", (void*)NativeBN_BN_lshift }, |
| 845 | { "BN_add_word", "(II)Z", (void*)NativeBN_BN_add_word }, |
| 846 | { "BN_sub_word", "(II)Z", (void*)NativeBN_BN_sub_word }, |
| 847 | { "BN_mul_word", "(II)Z", (void*)NativeBN_BN_mul_word }, |
| 848 | { "BN_div_word", "(II)I", (void*)NativeBN_BN_div_word }, |
| 849 | { "BN_mod_word", "(II)I", (void*)NativeBN_BN_mod_word }, |
| 850 | { "BN_add", "(III)Z", (void*)NativeBN_BN_add }, |
| 851 | { "BN_sub", "(III)Z", (void*)NativeBN_BN_sub }, |
| 852 | { "BN_gcd", "(IIII)Z", (void*)NativeBN_BN_gcd }, |
| 853 | { "BN_mul", "(IIII)Z", (void*)NativeBN_BN_mul }, |
| 854 | { "BN_exp", "(IIII)Z", (void*)NativeBN_BN_exp }, |
| 855 | { "BN_div", "(IIIII)Z", (void*)NativeBN_BN_div }, |
| 856 | { "BN_nnmod", "(IIII)Z", (void*)NativeBN_BN_nnmod }, |
| 857 | { "BN_mod_exp", "(IIIII)Z", (void*)NativeBN_BN_mod_exp }, |
| 858 | { "BN_mod_inverse", "(IIII)Z", (void*)NativeBN_BN_mod_inverse }, |
| 859 | { "BN_generate_prime_ex", "(IIZIII)Z", (void*)NativeBN_BN_generate_prime_ex }, |
| 860 | { "BN_is_prime_ex", "(IIII)Z", (void*)NativeBN_BN_is_prime_ex } |
| 861 | }; |
| 862 | |
| 863 | /* |
| 864 | * Peforms the actual registration of the native methods. |
| 865 | * Also looks up the fields that belong to the class (if |
| 866 | * any) and stores the field IDs. |
| 867 | */ |
| 868 | int register_org_openssl_NativeBN(JNIEnv* env) { |
| 869 | /* |
| 870 | jclass clazz; |
| 871 | |
| 872 | clazz = (*env)->FindClass(env, "org/openssl/NativeBN"); |
| 873 | if (clazz == NULL) { |
| 874 | return -1; |
| 875 | } |
| 876 | */ |
| 877 | return jniRegisterNativeMethods(env, "org/openssl/NativeBN", METHODS, NELEM(METHODS)); |
| 878 | } |