1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 3*7c478bd9Sstevel@tonic-gate * Use is subject to license terms. 4*7c478bd9Sstevel@tonic-gate */ 5*7c478bd9Sstevel@tonic-gate 6*7c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 7*7c478bd9Sstevel@tonic-gate 8*7c478bd9Sstevel@tonic-gate /* 9*7c478bd9Sstevel@tonic-gate * lib/crypto/keyhash_provider/hmac_md5.c 10*7c478bd9Sstevel@tonic-gate * 11*7c478bd9Sstevel@tonic-gate (I don't know) 12*7c478bd9Sstevel@tonic-gate . 13*7c478bd9Sstevel@tonic-gate * Copyright2001 by the Massachusetts Institute of Technology. 14*7c478bd9Sstevel@tonic-gate * All Rights Reserved. 15*7c478bd9Sstevel@tonic-gate * 16*7c478bd9Sstevel@tonic-gate * Export of this software from the United States of America may 17*7c478bd9Sstevel@tonic-gate * require a specific license from the United States Government. 18*7c478bd9Sstevel@tonic-gate * It is the responsibility of any person or organization contemplating 19*7c478bd9Sstevel@tonic-gate * export to obtain such a license before exporting. 20*7c478bd9Sstevel@tonic-gate * 21*7c478bd9Sstevel@tonic-gate * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 22*7c478bd9Sstevel@tonic-gate * distribute this software and its documentation for any purpose and 23*7c478bd9Sstevel@tonic-gate * without fee is hereby granted, provided that the above copyright 24*7c478bd9Sstevel@tonic-gate * notice appear in all copies and that both that copyright notice and 25*7c478bd9Sstevel@tonic-gate * this permission notice appear in supporting documentation, and that 26*7c478bd9Sstevel@tonic-gate * the name of M.I.T. not be used in advertising or publicity pertaining 27*7c478bd9Sstevel@tonic-gate * to distribution of the software without specific, written prior 28*7c478bd9Sstevel@tonic-gate * permission. Furthermore if you modify this software you must label 29*7c478bd9Sstevel@tonic-gate * your software as modified software and not distribute it in such a 30*7c478bd9Sstevel@tonic-gate * fashion that it might be confused with the original M.I.T. software. 31*7c478bd9Sstevel@tonic-gate * M.I.T. makes no representations about the suitability of 32*7c478bd9Sstevel@tonic-gate * this software for any purpose. It is provided "as is" without express 33*7c478bd9Sstevel@tonic-gate * or implied warranty. 34*7c478bd9Sstevel@tonic-gate * 35*7c478bd9Sstevel@tonic-gate * 36*7c478bd9Sstevel@tonic-gate * Implementation of the Microsoft hmac-md5 checksum type. 37*7c478bd9Sstevel@tonic-gate * Implemented based on draft-brezak-win2k-krb-rc4-hmac-03 38*7c478bd9Sstevel@tonic-gate */ 39*7c478bd9Sstevel@tonic-gate 40*7c478bd9Sstevel@tonic-gate #include <k5-int.h> 41*7c478bd9Sstevel@tonic-gate #include <arcfour.h> 42*7c478bd9Sstevel@tonic-gate #include <hash_provider.h> 43*7c478bd9Sstevel@tonic-gate #include <keyhash_provider.h> 44*7c478bd9Sstevel@tonic-gate 45*7c478bd9Sstevel@tonic-gate static void 46*7c478bd9Sstevel@tonic-gate k5_hmac_md5_hash_size (size_t *output) 47*7c478bd9Sstevel@tonic-gate { 48*7c478bd9Sstevel@tonic-gate *output = 16; 49*7c478bd9Sstevel@tonic-gate } 50*7c478bd9Sstevel@tonic-gate 51*7c478bd9Sstevel@tonic-gate static krb5_error_code 52*7c478bd9Sstevel@tonic-gate k5_hmac_md5_hash (krb5_context context, 53*7c478bd9Sstevel@tonic-gate const krb5_keyblock *key, krb5_keyusage usage, 54*7c478bd9Sstevel@tonic-gate const krb5_data *iv, 55*7c478bd9Sstevel@tonic-gate const krb5_data *input, krb5_data *output) 56*7c478bd9Sstevel@tonic-gate { 57*7c478bd9Sstevel@tonic-gate krb5_keyusage ms_usage; 58*7c478bd9Sstevel@tonic-gate krb5_error_code ret; 59*7c478bd9Sstevel@tonic-gate krb5_keyblock ks; 60*7c478bd9Sstevel@tonic-gate krb5_data ds, ks_constant, md5tmp; 61*7c478bd9Sstevel@tonic-gate krb5_data hash_input[2]; 62*7c478bd9Sstevel@tonic-gate char digest[MD5_CKSUM_LENGTH]; 63*7c478bd9Sstevel@tonic-gate char t[4]; 64*7c478bd9Sstevel@tonic-gate CK_MECHANISM mechanism; 65*7c478bd9Sstevel@tonic-gate CK_RV rv; 66*7c478bd9Sstevel@tonic-gate CK_ULONG hashlen; 67*7c478bd9Sstevel@tonic-gate 68*7c478bd9Sstevel@tonic-gate bzero(&ks, sizeof(krb5_keyblock)); 69*7c478bd9Sstevel@tonic-gate ds.length = key->length; 70*7c478bd9Sstevel@tonic-gate ks.length = key->length; 71*7c478bd9Sstevel@tonic-gate ds.data = malloc(ds.length); 72*7c478bd9Sstevel@tonic-gate if (ds.data == NULL) 73*7c478bd9Sstevel@tonic-gate return (ENOMEM); 74*7c478bd9Sstevel@tonic-gate ks.contents = (void *) ds.data; 75*7c478bd9Sstevel@tonic-gate 76*7c478bd9Sstevel@tonic-gate ks_constant.data = "signaturekey"; 77*7c478bd9Sstevel@tonic-gate ks_constant.length = strlen(ks_constant.data)+1; /* Including null*/ 78*7c478bd9Sstevel@tonic-gate 79*7c478bd9Sstevel@tonic-gate ret = krb5_hmac(context, &krb5int_hash_md5, key, 1, 80*7c478bd9Sstevel@tonic-gate &ks_constant, &ds); 81*7c478bd9Sstevel@tonic-gate if (ret) 82*7c478bd9Sstevel@tonic-gate goto cleanup; 83*7c478bd9Sstevel@tonic-gate 84*7c478bd9Sstevel@tonic-gate ms_usage = krb5int_arcfour_translate_usage (usage); 85*7c478bd9Sstevel@tonic-gate t[0] = (ms_usage) & 0xff; 86*7c478bd9Sstevel@tonic-gate t[1] = (ms_usage>>8) & 0xff; 87*7c478bd9Sstevel@tonic-gate t[2] = (ms_usage >>16) & 0xff; 88*7c478bd9Sstevel@tonic-gate t[3] = (ms_usage>>24) & 0XFF; 89*7c478bd9Sstevel@tonic-gate 90*7c478bd9Sstevel@tonic-gate mechanism.mechanism = CKM_MD5; 91*7c478bd9Sstevel@tonic-gate mechanism.pParameter = NULL_PTR; 92*7c478bd9Sstevel@tonic-gate mechanism.ulParameterLen = 0; 93*7c478bd9Sstevel@tonic-gate 94*7c478bd9Sstevel@tonic-gate if ((rv = C_DigestInit(krb_ctx_hSession(context), &mechanism)) != CKR_OK) { 95*7c478bd9Sstevel@tonic-gate KRB5_LOG(KRB5_ERR, "C_DigestInit failed in k5_md5_hmac_hash: " 96*7c478bd9Sstevel@tonic-gate "rv = 0x%x.", rv); 97*7c478bd9Sstevel@tonic-gate ret = PKCS_ERR; 98*7c478bd9Sstevel@tonic-gate goto cleanup; 99*7c478bd9Sstevel@tonic-gate } 100*7c478bd9Sstevel@tonic-gate if ((rv = C_DigestUpdate(krb_ctx_hSession(context), 101*7c478bd9Sstevel@tonic-gate (CK_BYTE_PTR)t, (CK_ULONG)sizeof(t))) != CKR_OK) { 102*7c478bd9Sstevel@tonic-gate KRB5_LOG(KRB5_ERR, "C_DigestUpdate failed in k5_md5_hmac_hash: " 103*7c478bd9Sstevel@tonic-gate "rv = 0x%x", rv); 104*7c478bd9Sstevel@tonic-gate ret = PKCS_ERR; 105*7c478bd9Sstevel@tonic-gate goto cleanup; 106*7c478bd9Sstevel@tonic-gate } 107*7c478bd9Sstevel@tonic-gate if ((rv = C_DigestUpdate(krb_ctx_hSession(context), 108*7c478bd9Sstevel@tonic-gate (CK_BYTE_PTR)input->data, (CK_ULONG)input->length)) != CKR_OK) { 109*7c478bd9Sstevel@tonic-gate KRB5_LOG(KRB5_ERR, "C_DigestUpdate failed in k5_md5_hmac_hash: " 110*7c478bd9Sstevel@tonic-gate "rv = 0x%x", rv); 111*7c478bd9Sstevel@tonic-gate ret = PKCS_ERR; 112*7c478bd9Sstevel@tonic-gate goto cleanup; 113*7c478bd9Sstevel@tonic-gate } 114*7c478bd9Sstevel@tonic-gate hashlen = MD5_CKSUM_LENGTH; 115*7c478bd9Sstevel@tonic-gate if ((rv = C_DigestFinal(krb_ctx_hSession(context), 116*7c478bd9Sstevel@tonic-gate (CK_BYTE_PTR)digest, (CK_ULONG_PTR)&hashlen)) != CKR_OK) { 117*7c478bd9Sstevel@tonic-gate KRB5_LOG(KRB5_ERR, "C_DigestFinal failed in k5_md5_hmac_hash: " 118*7c478bd9Sstevel@tonic-gate "rv = 0x%x", rv); 119*7c478bd9Sstevel@tonic-gate ret = PKCS_ERR; 120*7c478bd9Sstevel@tonic-gate goto cleanup; 121*7c478bd9Sstevel@tonic-gate } 122*7c478bd9Sstevel@tonic-gate 123*7c478bd9Sstevel@tonic-gate md5tmp.data = digest; 124*7c478bd9Sstevel@tonic-gate md5tmp.length = hashlen; 125*7c478bd9Sstevel@tonic-gate 126*7c478bd9Sstevel@tonic-gate ret = krb5_hmac (context, &krb5int_hash_md5, &ks, 1, &md5tmp, output); 127*7c478bd9Sstevel@tonic-gate 128*7c478bd9Sstevel@tonic-gate cleanup: 129*7c478bd9Sstevel@tonic-gate bzero(ks.contents, ks.length); 130*7c478bd9Sstevel@tonic-gate bzero(md5tmp.data, md5tmp.length); 131*7c478bd9Sstevel@tonic-gate FREE (ks.contents, ks.length); 132*7c478bd9Sstevel@tonic-gate return (ret); 133*7c478bd9Sstevel@tonic-gate } 134*7c478bd9Sstevel@tonic-gate 135*7c478bd9Sstevel@tonic-gate const struct krb5_keyhash_provider 136*7c478bd9Sstevel@tonic-gate krb5int_keyhash_hmac_md5 = { 137*7c478bd9Sstevel@tonic-gate k5_hmac_md5_hash_size, 138*7c478bd9Sstevel@tonic-gate k5_hmac_md5_hash, 139*7c478bd9Sstevel@tonic-gate NULL /*checksum again*/ 140*7c478bd9Sstevel@tonic-gate }; 141*7c478bd9Sstevel@tonic-gate 142