1 /* 2 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* 7 * Copyright (C) 1998 by the FundsXpress, INC. 8 * 9 * All rights reserved. 10 * 11 * Export of this software from the United States of America may require 12 * a specific license from the United States Government. It is the 13 * responsibility of any person or organization contemplating export to 14 * obtain such a license before exporting. 15 * 16 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and 17 * distribute this software and its documentation for any purpose and 18 * without fee is hereby granted, provided that the above copyright 19 * notice appear in all copies and that both that copyright notice and 20 * this permission notice appear in supporting documentation, and that 21 * the name of FundsXpress. not be used in advertising or publicity pertaining 22 * to distribution of the software without specific, written prior 23 * permission. FundsXpress makes no representations about the suitability of 24 * this software for any purpose. It is provided "as is" without express 25 * or implied warranty. 26 * 27 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 28 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 29 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 30 */ 31 32 #include "k5-int.h" 33 #include "etypes.h" 34 35 36 #ifdef _KERNEL 37 krb5_error_code 38 update_key_template(krb5_keyblock *key) 39 { 40 crypto_mechanism_t kef_mech; 41 int rv = 0; 42 krb5_error_code ret = 0; 43 44 KRB5_LOG0(KRB5_INFO, "update_key_template()"); 45 if (key == NULL) 46 return (ret); 47 48 /* 49 * Preallocate the crypto_key_t records 50 * needed by the kernel crypto calls later. 51 */ 52 kef_mech.cm_type = key->kef_mt; 53 kef_mech.cm_param = NULL; 54 kef_mech.cm_param_len = 0; 55 /* 56 * Create an template to improve HMAC performance later. 57 */ 58 rv = crypto_create_ctx_template(&kef_mech, 59 &key->kef_key, 60 &key->key_tmpl, 61 KM_SLEEP); 62 if (rv != CRYPTO_SUCCESS) { 63 /* 64 * Some mechs don't support context templates 65 */ 66 if (rv == CRYPTO_NOT_SUPPORTED) { 67 ret = 0; 68 key->key_tmpl = NULL; 69 } else { 70 KRB5_LOG(KRB5_ERR,"crypto_create_ctx_template " 71 "error: %0x", rv); 72 ret = KRB5_KEF_ERROR; 73 } 74 } 75 return (ret); 76 } 77 /* 78 * initialize the KEF components of the krb5_keyblock record. 79 */ 80 krb5_error_code 81 init_key_kef(crypto_mech_type_t mech_type, krb5_keyblock *key) 82 { 83 krb5_error_code rv = 0; 84 85 KRB5_LOG0(KRB5_INFO, "init_key_kef()"); 86 if (key == NULL) 87 return (rv); 88 89 if (key->kef_key.ck_data == NULL) { 90 key->kef_key.ck_data = key->contents; 91 } 92 93 /* kef keys are measured in bits */ 94 key->kef_key.ck_length = key->length * 8; 95 key->kef_key.ck_format = CRYPTO_KEY_RAW; 96 key->kef_mt = mech_type; 97 98 if (key->key_tmpl == NULL && mech_type != CRYPTO_MECH_INVALID) { 99 rv = update_key_template(key); 100 } 101 return(rv); 102 } 103 #else 104 105 /* 106 * init_key_uef 107 * Initialize the Userland Encryption Framework fields of the 108 * key block. 109 */ 110 krb5_error_code 111 init_key_uef(CK_SESSION_HANDLE hSession, krb5_keyblock *key) 112 { 113 CK_RV rv = CKR_OK; 114 CK_MECHANISM mechanism; 115 CK_OBJECT_CLASS class = CKO_SECRET_KEY; 116 CK_KEY_TYPE keyType; 117 CK_BBOOL true = TRUE, false = FALSE; 118 CK_ATTRIBUTE template[6]; 119 120 /* If its already initialized, return OK */ 121 /* 122 * fork safety: if the key->pid != __krb5_current_pid then a fork has 123 * taken place and the pkcs11 key handle must be re-acquired. 124 */ 125 if ((key->hKey != CK_INVALID_HANDLE) && 126 (key->pid == __krb5_current_pid)) 127 return (rv); 128 129 /* fork safety */ 130 key->pid = __krb5_current_pid; 131 132 if ((rv = get_key_type(key->enctype, &keyType)) != CKR_OK) { 133 KRB5_LOG0(KRB5_ERR, "failure to get key type in function " 134 "init_key_uef."); 135 return (PKCS_ERR); 136 } 137 138 template[0].type = CKA_CLASS; 139 template[0].pValue = &class; 140 template[0].ulValueLen = sizeof (class); 141 template[1].type = CKA_KEY_TYPE; 142 template[1].pValue = &keyType; 143 template[1].ulValueLen = sizeof (keyType); 144 template[2].type = CKA_TOKEN; 145 template[2].pValue = &false; 146 template[2].ulValueLen = sizeof (false); 147 template[3].type = CKA_ENCRYPT; 148 template[3].pValue = &true; 149 template[3].ulValueLen = sizeof (true); 150 template[4].type = CKA_DECRYPT; 151 template[4].pValue = &true; 152 template[4].ulValueLen = sizeof (true); 153 template[5].type = CKA_VALUE; 154 template[5].pValue = key->contents; 155 template[5].ulValueLen = key->length; 156 157 /* Create an object handle for the key */ 158 if ((rv = C_CreateObject(hSession, template, 159 sizeof(template)/sizeof(CK_ATTRIBUTE), 160 &key->hKey)) != CKR_OK) { 161 162 KRB5_LOG(KRB5_ERR, "C_CreateObject failed in " 163 "init_key_uef: rv = 0x%x.", rv); 164 rv = PKCS_ERR; 165 } 166 167 return (rv); 168 169 } 170 171 #endif /* _KERNEL */ 172 173 /*ARGSUSED*/ 174 krb5_error_code KRB5_CALLCONV 175 krb5_c_encrypt(krb5_context context, const krb5_keyblock *key, 176 krb5_keyusage usage, const krb5_data *ivec, 177 const krb5_data *input, krb5_enc_data *output) 178 { 179 krb5_error_code ret; 180 int i; 181 182 KRB5_LOG(KRB5_INFO, "krb5_c_encrypt start etype = %d", key->enctype); 183 for (i=0; i<krb5_enctypes_length; i++) { 184 if (krb5_enctypes_list[i].etype == key->enctype) 185 break; 186 } 187 188 if (i == krb5_enctypes_length) 189 return(KRB5_BAD_ENCTYPE); 190 191 output->magic = KV5M_ENC_DATA; 192 output->kvno = 0; 193 output->enctype = key->enctype; 194 195 #ifdef _KERNEL 196 context->kef_cipher_mt = krb5_enctypes_list[i].kef_cipher_mt; 197 context->kef_hash_mt = krb5_enctypes_list[i].kef_hash_mt; 198 if (key->kef_key.ck_data == NULL) { 199 if ((ret = init_key_kef(context->kef_cipher_mt, 200 (krb5_keyblock *)key))) 201 return(ret); 202 } 203 #else 204 if ((ret = init_key_uef(krb_ctx_hSession(context), (krb5_keyblock *)key))) 205 return (ret); 206 207 #endif /* _KERNEL */ 208 209 KRB5_LOG0(KRB5_INFO, "krb5_c_encrypt calling encrypt."); 210 return((*(krb5_enctypes_list[i].encrypt)) 211 (context, krb5_enctypes_list[i].enc, krb5_enctypes_list[i].hash, 212 key, usage, ivec, input, &output->ciphertext)); 213 } 214