1 /*
2 * Common Public License Version 0.5
3 *
4 * THE ACCOMPANYING PROGRAM IS PROVIDED UNDER THE TERMS OF
5 * THIS COMMON PUBLIC LICENSE ("AGREEMENT"). ANY USE,
6 * REPRODUCTION OR DISTRIBUTION OF THE PROGRAM CONSTITUTES
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254 * this Agreement, but in order to avoid inconsistency the
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265 * The Program (including Contributions) may always be
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284 *
285 *
286 *
287 * (C) COPYRIGHT International Business Machines Corp. 2001,2002
288 */
289 /*
290 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
291 * Use is subject to license terms.
292 */
293
294 #include "tpmtok_int.h"
295
296 CK_RV
md5_hash(SESSION * sess,CK_BBOOL length_only,DIGEST_CONTEXT * ctx,CK_BYTE * in_data,CK_ULONG in_data_len,CK_BYTE * out_data,CK_ULONG * out_data_len)297 md5_hash(SESSION *sess,
298 CK_BBOOL length_only,
299 DIGEST_CONTEXT *ctx,
300 CK_BYTE *in_data,
301 CK_ULONG in_data_len,
302 CK_BYTE *out_data,
303 CK_ULONG *out_data_len)
304 {
305 if (! sess || ! ctx || ! out_data_len) {
306 return (CKR_FUNCTION_FAILED);
307 }
308
309 *out_data_len = MD5_DIGEST_LENGTH;
310 if (length_only == TRUE) {
311 return (CKR_OK);
312 }
313
314 MD5Update(ctx->context.md5ctx, in_data, in_data_len);
315 MD5Final(out_data, ctx->context.md5ctx);
316
317 return (CKR_OK);
318 }
319
320 CK_RV
md5_hmac_sign(SESSION * sess,CK_BBOOL length_only,SIGN_VERIFY_CONTEXT * ctx,CK_BYTE * in_data,CK_ULONG in_data_len,CK_BYTE * out_data,CK_ULONG * out_data_len)321 md5_hmac_sign(SESSION * sess,
322 CK_BBOOL length_only,
323 SIGN_VERIFY_CONTEXT * ctx,
324 CK_BYTE * in_data,
325 CK_ULONG in_data_len,
326 CK_BYTE * out_data,
327 CK_ULONG * out_data_len)
328 {
329 OBJECT * key_obj = NULL;
330 CK_ATTRIBUTE * attr = NULL;
331 CK_BYTE hash[MD5_DIGEST_LENGTH];
332 DIGEST_CONTEXT digest_ctx;
333 CK_MECHANISM digest_mech;
334 CK_BYTE k_ipad[MD5_BLOCK_SIZE];
335 CK_BYTE k_opad[MD5_BLOCK_SIZE];
336 CK_ULONG key_bytes, hash_len, hmac_len;
337 CK_ULONG i;
338 CK_RV rc;
339
340 if (! sess || ! ctx || ! out_data_len) {
341 return (CKR_FUNCTION_FAILED);
342 }
343
344 if (ctx->mech.mechanism == CKM_MD5_HMAC_GENERAL) {
345 hmac_len = *(CK_ULONG *)ctx->mech.pParameter;
346
347 if (hmac_len == 0) {
348 *out_data_len = 0;
349 return (CKR_OK);
350 }
351 }
352 else
353 hmac_len = MD5_DIGEST_LENGTH;
354
355
356 *out_data_len = hmac_len;
357 if (length_only == TRUE) {
358 return (CKR_OK);
359 }
360
361 (void) memset(&digest_ctx, 0x0, sizeof (DIGEST_CONTEXT));
362
363 rc = object_mgr_find_in_map1(sess->hContext, ctx->key, &key_obj);
364 if (rc != CKR_OK)
365 return (rc);
366 rc = template_attribute_find(key_obj->template, CKA_VALUE, &attr);
367 if (rc == FALSE) {
368 return (CKR_FUNCTION_FAILED);
369 }
370 else
371 key_bytes = attr->ulValueLen;
372
373 // build (K XOR ipad), (K XOR opad)
374 //
375 if (key_bytes > MD5_BLOCK_SIZE) {
376 digest_mech.mechanism = CKM_MD5;
377 digest_mech.ulParameterLen = 0;
378 digest_mech.pParameter = NULL;
379
380 rc = digest_mgr_init(sess, &digest_ctx, &digest_mech);
381 if (rc != CKR_OK) {
382 (void) digest_mgr_cleanup(&digest_ctx);
383 return (rc);
384 }
385
386 hash_len = *out_data_len;
387 rc = digest_mgr_digest(sess, FALSE, &digest_ctx,
388 attr->pValue, attr->ulValueLen,
389 hash, &hash_len);
390 if (rc != CKR_OK) {
391 (void) digest_mgr_cleanup(&digest_ctx);
392 return (rc);
393 }
394
395 (void) digest_mgr_cleanup(&digest_ctx);
396 (void) memset(&digest_ctx, 0x0, sizeof (DIGEST_CONTEXT));
397
398 for (i = 0; i < hash_len; i++) {
399 k_ipad[i] = hash[i] ^ 0x36;
400 k_opad[i] = hash[i] ^ 0x5C;
401 }
402
403 (void) memset(&k_ipad[i], 0x36, MD5_BLOCK_SIZE - i);
404 (void) memset(&k_opad[i], 0x5C, MD5_BLOCK_SIZE - i);
405 } else {
406 CK_BYTE *key = attr->pValue;
407
408 for (i = 0; i < key_bytes; i++) {
409 k_ipad[i] = key[i] ^ 0x36;
410 k_opad[i] = key[i] ^ 0x5C;
411 }
412
413 (void) memset(&k_ipad[i], 0x36, MD5_BLOCK_SIZE - key_bytes);
414 (void) memset(&k_opad[i], 0x5C, MD5_BLOCK_SIZE - key_bytes);
415 }
416
417 digest_mech.mechanism = CKM_MD5;
418 digest_mech.ulParameterLen = 0;
419 digest_mech.pParameter = NULL;
420
421 rc = digest_mgr_init(sess, &digest_ctx, &digest_mech);
422 if (rc != CKR_OK) {
423 (void) digest_mgr_cleanup(&digest_ctx);
424 return (rc);
425 }
426
427 rc = digest_mgr_digest_update(sess, &digest_ctx,
428 k_ipad, MD5_BLOCK_SIZE);
429 if (rc != CKR_OK) {
430 (void) digest_mgr_cleanup(&digest_ctx);
431 return (rc);
432 }
433
434 rc = digest_mgr_digest_update(sess, &digest_ctx,
435 in_data, in_data_len);
436 if (rc != CKR_OK) {
437 (void) digest_mgr_cleanup(&digest_ctx);
438 return (rc);
439 }
440
441 hash_len = sizeof (hash);
442 rc = digest_mgr_digest_final(sess, &digest_ctx, hash, &hash_len);
443 if (rc != CKR_OK) {
444 (void) digest_mgr_cleanup(&digest_ctx);
445 return (rc);
446 }
447
448 (void) digest_mgr_cleanup(&digest_ctx);
449 (void) memset(&digest_ctx, 0x0, sizeof (DIGEST_CONTEXT));
450
451 rc = digest_mgr_init(sess, &digest_ctx, &digest_mech);
452 if (rc != CKR_OK) {
453 (void) digest_mgr_cleanup(&digest_ctx);
454 return (rc);
455 }
456
457 rc = digest_mgr_digest_update(sess, &digest_ctx,
458 k_opad, MD5_BLOCK_SIZE);
459 if (rc != CKR_OK) {
460 (void) digest_mgr_cleanup(&digest_ctx);
461 return (rc);
462 }
463
464 rc = digest_mgr_digest_update(sess, &digest_ctx, hash, hash_len);
465 if (rc != CKR_OK) {
466 (void) digest_mgr_cleanup(&digest_ctx);
467 return (rc);
468 }
469
470 hash_len = sizeof (hash);
471 rc = digest_mgr_digest_final(sess, &digest_ctx, hash, &hash_len);
472 if (rc != CKR_OK) {
473 (void) digest_mgr_cleanup(&digest_ctx);
474 return (rc);
475 }
476
477 (void) memcpy(out_data, hash, hmac_len);
478 *out_data_len = hmac_len;
479
480 (void) digest_mgr_cleanup(&digest_ctx);
481 return (CKR_OK);
482 }
483
484 CK_RV
md5_hmac_verify(SESSION * sess,SIGN_VERIFY_CONTEXT * ctx,CK_BYTE * in_data,CK_ULONG in_data_len,CK_BYTE * signature,CK_ULONG sig_len)485 md5_hmac_verify(SESSION * sess,
486 SIGN_VERIFY_CONTEXT * ctx,
487 CK_BYTE * in_data,
488 CK_ULONG in_data_len,
489 CK_BYTE * signature,
490 CK_ULONG sig_len)
491 {
492 CK_BYTE hmac[MD5_DIGEST_LENGTH];
493 SIGN_VERIFY_CONTEXT hmac_ctx;
494 CK_ULONG hmac_len, len;
495 CK_RV rc;
496
497 if (! sess || ! ctx || ! in_data || ! signature) {
498 return (CKR_FUNCTION_FAILED);
499 }
500 if (ctx->mech.mechanism == CKM_MD5_HMAC_GENERAL)
501 hmac_len = *(CK_ULONG *)ctx->mech.pParameter;
502 else
503 hmac_len = MD5_DIGEST_LENGTH;
504
505 (void) memset(&hmac_ctx, 0, sizeof (SIGN_VERIFY_CONTEXT));
506
507 rc = sign_mgr_init(sess, &hmac_ctx, &ctx->mech, FALSE, ctx->key);
508 if (rc != CKR_OK) {
509 (void) sign_mgr_cleanup(&hmac_ctx);
510 return (rc);
511 }
512
513 len = sizeof (hmac);
514 rc = sign_mgr_sign(sess, FALSE, &hmac_ctx,
515 in_data, in_data_len, hmac, &len);
516 if (rc != CKR_OK) {
517 (void) sign_mgr_cleanup(&hmac_ctx);
518 return (rc);
519 }
520
521 if ((len != hmac_len) || (len != sig_len)) {
522 return (CKR_SIGNATURE_LEN_RANGE);
523 }
524 if (memcmp(hmac, signature, hmac_len) != 0) {
525 rc = CKR_SIGNATURE_INVALID;
526 }
527 (void) sign_mgr_cleanup(&hmac_ctx);
528 return (rc);
529 }
530