17c478bd9Sstevel@tonic-gate /* 2*505d05c7Sgtb * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 37c478bd9Sstevel@tonic-gate * Use is subject to license terms. 47c478bd9Sstevel@tonic-gate */ 57c478bd9Sstevel@tonic-gate 67c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 77c478bd9Sstevel@tonic-gate 87c478bd9Sstevel@tonic-gate /* 97c478bd9Sstevel@tonic-gate * lib/crypto/keyhash_provider/hmac_md5.c 107c478bd9Sstevel@tonic-gate * 117c478bd9Sstevel@tonic-gate (I don't know) 127c478bd9Sstevel@tonic-gate . 137c478bd9Sstevel@tonic-gate * Copyright2001 by the Massachusetts Institute of Technology. 147c478bd9Sstevel@tonic-gate * All Rights Reserved. 157c478bd9Sstevel@tonic-gate * 167c478bd9Sstevel@tonic-gate * Export of this software from the United States of America may 177c478bd9Sstevel@tonic-gate * require a specific license from the United States Government. 187c478bd9Sstevel@tonic-gate * It is the responsibility of any person or organization contemplating 197c478bd9Sstevel@tonic-gate * export to obtain such a license before exporting. 207c478bd9Sstevel@tonic-gate * 217c478bd9Sstevel@tonic-gate * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 227c478bd9Sstevel@tonic-gate * distribute this software and its documentation for any purpose and 237c478bd9Sstevel@tonic-gate * without fee is hereby granted, provided that the above copyright 247c478bd9Sstevel@tonic-gate * notice appear in all copies and that both that copyright notice and 257c478bd9Sstevel@tonic-gate * this permission notice appear in supporting documentation, and that 267c478bd9Sstevel@tonic-gate * the name of M.I.T. not be used in advertising or publicity pertaining 277c478bd9Sstevel@tonic-gate * to distribution of the software without specific, written prior 287c478bd9Sstevel@tonic-gate * permission. Furthermore if you modify this software you must label 297c478bd9Sstevel@tonic-gate * your software as modified software and not distribute it in such a 307c478bd9Sstevel@tonic-gate * fashion that it might be confused with the original M.I.T. software. 317c478bd9Sstevel@tonic-gate * M.I.T. makes no representations about the suitability of 327c478bd9Sstevel@tonic-gate * this software for any purpose. It is provided "as is" without express 337c478bd9Sstevel@tonic-gate * or implied warranty. 347c478bd9Sstevel@tonic-gate * 357c478bd9Sstevel@tonic-gate * 367c478bd9Sstevel@tonic-gate * Implementation of the Microsoft hmac-md5 checksum type. 377c478bd9Sstevel@tonic-gate * Implemented based on draft-brezak-win2k-krb-rc4-hmac-03 387c478bd9Sstevel@tonic-gate */ 397c478bd9Sstevel@tonic-gate 407c478bd9Sstevel@tonic-gate #include <k5-int.h> 417c478bd9Sstevel@tonic-gate #include <arcfour.h> 427c478bd9Sstevel@tonic-gate #include <hash_provider.h> 437c478bd9Sstevel@tonic-gate #include <keyhash_provider.h> 447c478bd9Sstevel@tonic-gate 457c478bd9Sstevel@tonic-gate static krb5_error_code 467c478bd9Sstevel@tonic-gate k5_hmac_md5_hash (krb5_context context, 477c478bd9Sstevel@tonic-gate const krb5_keyblock *key, krb5_keyusage usage, 487c478bd9Sstevel@tonic-gate const krb5_data *iv, 497c478bd9Sstevel@tonic-gate const krb5_data *input, krb5_data *output) 507c478bd9Sstevel@tonic-gate { 517c478bd9Sstevel@tonic-gate krb5_keyusage ms_usage; 527c478bd9Sstevel@tonic-gate krb5_error_code ret; 537c478bd9Sstevel@tonic-gate krb5_keyblock ks; 547c478bd9Sstevel@tonic-gate krb5_data ds, ks_constant, md5tmp; 557c478bd9Sstevel@tonic-gate krb5_data hash_input[2]; 567c478bd9Sstevel@tonic-gate char digest[MD5_CKSUM_LENGTH]; 577c478bd9Sstevel@tonic-gate char t[4]; 587c478bd9Sstevel@tonic-gate CK_MECHANISM mechanism; 597c478bd9Sstevel@tonic-gate CK_RV rv; 607c478bd9Sstevel@tonic-gate CK_ULONG hashlen; 617c478bd9Sstevel@tonic-gate 627c478bd9Sstevel@tonic-gate bzero(&ks, sizeof(krb5_keyblock)); 637c478bd9Sstevel@tonic-gate ds.length = key->length; 647c478bd9Sstevel@tonic-gate ks.length = key->length; 657c478bd9Sstevel@tonic-gate ds.data = malloc(ds.length); 667c478bd9Sstevel@tonic-gate if (ds.data == NULL) 677c478bd9Sstevel@tonic-gate return (ENOMEM); 687c478bd9Sstevel@tonic-gate ks.contents = (void *) ds.data; 697c478bd9Sstevel@tonic-gate 707c478bd9Sstevel@tonic-gate ks_constant.data = "signaturekey"; 717c478bd9Sstevel@tonic-gate ks_constant.length = strlen(ks_constant.data)+1; /* Including null*/ 727c478bd9Sstevel@tonic-gate 737c478bd9Sstevel@tonic-gate ret = krb5_hmac(context, &krb5int_hash_md5, key, 1, 747c478bd9Sstevel@tonic-gate &ks_constant, &ds); 757c478bd9Sstevel@tonic-gate if (ret) 767c478bd9Sstevel@tonic-gate goto cleanup; 777c478bd9Sstevel@tonic-gate 787c478bd9Sstevel@tonic-gate ms_usage = krb5int_arcfour_translate_usage (usage); 797c478bd9Sstevel@tonic-gate t[0] = (ms_usage) & 0xff; 807c478bd9Sstevel@tonic-gate t[1] = (ms_usage>>8) & 0xff; 817c478bd9Sstevel@tonic-gate t[2] = (ms_usage >>16) & 0xff; 827c478bd9Sstevel@tonic-gate t[3] = (ms_usage>>24) & 0XFF; 837c478bd9Sstevel@tonic-gate 847c478bd9Sstevel@tonic-gate mechanism.mechanism = CKM_MD5; 857c478bd9Sstevel@tonic-gate mechanism.pParameter = NULL_PTR; 867c478bd9Sstevel@tonic-gate mechanism.ulParameterLen = 0; 877c478bd9Sstevel@tonic-gate 887c478bd9Sstevel@tonic-gate if ((rv = C_DigestInit(krb_ctx_hSession(context), &mechanism)) != CKR_OK) { 897c478bd9Sstevel@tonic-gate KRB5_LOG(KRB5_ERR, "C_DigestInit failed in k5_md5_hmac_hash: " 907c478bd9Sstevel@tonic-gate "rv = 0x%x.", rv); 917c478bd9Sstevel@tonic-gate ret = PKCS_ERR; 927c478bd9Sstevel@tonic-gate goto cleanup; 937c478bd9Sstevel@tonic-gate } 947c478bd9Sstevel@tonic-gate if ((rv = C_DigestUpdate(krb_ctx_hSession(context), 957c478bd9Sstevel@tonic-gate (CK_BYTE_PTR)t, (CK_ULONG)sizeof(t))) != CKR_OK) { 967c478bd9Sstevel@tonic-gate KRB5_LOG(KRB5_ERR, "C_DigestUpdate failed in k5_md5_hmac_hash: " 977c478bd9Sstevel@tonic-gate "rv = 0x%x", rv); 987c478bd9Sstevel@tonic-gate ret = PKCS_ERR; 997c478bd9Sstevel@tonic-gate goto cleanup; 1007c478bd9Sstevel@tonic-gate } 1017c478bd9Sstevel@tonic-gate if ((rv = C_DigestUpdate(krb_ctx_hSession(context), 1027c478bd9Sstevel@tonic-gate (CK_BYTE_PTR)input->data, (CK_ULONG)input->length)) != CKR_OK) { 1037c478bd9Sstevel@tonic-gate KRB5_LOG(KRB5_ERR, "C_DigestUpdate failed in k5_md5_hmac_hash: " 1047c478bd9Sstevel@tonic-gate "rv = 0x%x", rv); 1057c478bd9Sstevel@tonic-gate ret = PKCS_ERR; 1067c478bd9Sstevel@tonic-gate goto cleanup; 1077c478bd9Sstevel@tonic-gate } 1087c478bd9Sstevel@tonic-gate hashlen = MD5_CKSUM_LENGTH; 1097c478bd9Sstevel@tonic-gate if ((rv = C_DigestFinal(krb_ctx_hSession(context), 1107c478bd9Sstevel@tonic-gate (CK_BYTE_PTR)digest, (CK_ULONG_PTR)&hashlen)) != CKR_OK) { 1117c478bd9Sstevel@tonic-gate KRB5_LOG(KRB5_ERR, "C_DigestFinal failed in k5_md5_hmac_hash: " 1127c478bd9Sstevel@tonic-gate "rv = 0x%x", rv); 1137c478bd9Sstevel@tonic-gate ret = PKCS_ERR; 1147c478bd9Sstevel@tonic-gate goto cleanup; 1157c478bd9Sstevel@tonic-gate } 1167c478bd9Sstevel@tonic-gate 1177c478bd9Sstevel@tonic-gate md5tmp.data = digest; 1187c478bd9Sstevel@tonic-gate md5tmp.length = hashlen; 1197c478bd9Sstevel@tonic-gate 1207c478bd9Sstevel@tonic-gate ret = krb5_hmac (context, &krb5int_hash_md5, &ks, 1, &md5tmp, output); 1217c478bd9Sstevel@tonic-gate 1227c478bd9Sstevel@tonic-gate cleanup: 1237c478bd9Sstevel@tonic-gate bzero(ks.contents, ks.length); 1247c478bd9Sstevel@tonic-gate bzero(md5tmp.data, md5tmp.length); 1257c478bd9Sstevel@tonic-gate FREE (ks.contents, ks.length); 1267c478bd9Sstevel@tonic-gate return (ret); 1277c478bd9Sstevel@tonic-gate } 1287c478bd9Sstevel@tonic-gate 1297c478bd9Sstevel@tonic-gate const struct krb5_keyhash_provider 1307c478bd9Sstevel@tonic-gate krb5int_keyhash_hmac_md5 = { 131*505d05c7Sgtb 16, 1327c478bd9Sstevel@tonic-gate k5_hmac_md5_hash, 1337c478bd9Sstevel@tonic-gate NULL /*checksum again*/ 1347c478bd9Sstevel@tonic-gate }; 1357c478bd9Sstevel@tonic-gate 136