1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 #include <pthread.h> 29 #include <security/cryptoki.h> 30 #include "softGlobal.h" 31 #include "softSession.h" 32 #include "softObject.h" 33 #include "softOps.h" 34 35 36 CK_RV 37 C_DecryptInit(CK_SESSION_HANDLE hSession, CK_MECHANISM_PTR pMechanism, 38 CK_OBJECT_HANDLE hKey) 39 { 40 41 CK_RV rv; 42 soft_session_t *session_p; 43 soft_object_t *key_p; 44 boolean_t lock_held = B_FALSE; 45 46 if (!softtoken_initialized) 47 return (CKR_CRYPTOKI_NOT_INITIALIZED); 48 49 /* Obtain the session pointer. */ 50 rv = handle2session(hSession, &session_p); 51 if (rv != CKR_OK) 52 return (rv); 53 54 if (pMechanism == NULL) { 55 rv = CKR_ARGUMENTS_BAD; 56 goto clean_exit; 57 } 58 59 /* Obtain the object pointer. */ 60 HANDLE2OBJECT(hKey, key_p, rv); 61 if (rv != CKR_OK) 62 goto clean_exit; 63 64 /* Check to see if key object allows for decryption. */ 65 if (!(key_p->bool_attr_mask & DECRYPT_BOOL_ON)) { 66 rv = CKR_KEY_TYPE_INCONSISTENT; 67 goto clean_exit1; 68 } 69 70 (void) pthread_mutex_lock(&session_p->session_mutex); 71 lock_held = B_TRUE; 72 73 /* Check to see if decrypt operation is already active. */ 74 if (session_p->decrypt.flags & CRYPTO_OPERATION_ACTIVE) { 75 /* free the memory to avoid memory leak */ 76 soft_crypt_cleanup(session_p, B_FALSE, lock_held); 77 } 78 79 /* 80 * This active flag will remain ON until application calls either 81 * C_Decrypt or C_DecryptFinal to actually obtain the final piece 82 * of plaintext. 83 */ 84 session_p->decrypt.flags = CRYPTO_OPERATION_ACTIVE; 85 86 (void) pthread_mutex_unlock(&session_p->session_mutex); 87 lock_held = B_FALSE; 88 89 rv = soft_decrypt_init(session_p, pMechanism, key_p); 90 91 if (rv != CKR_OK) { 92 (void) pthread_mutex_lock(&session_p->session_mutex); 93 session_p->decrypt.flags &= ~CRYPTO_OPERATION_ACTIVE; 94 lock_held = B_TRUE; 95 } 96 97 clean_exit1: 98 OBJ_REFRELE(key_p); 99 clean_exit: 100 SES_REFRELE(session_p, lock_held); 101 return (rv); 102 } 103 104 105 CK_RV 106 C_Decrypt(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pEncryptedData, 107 CK_ULONG ulEncryptedDataLen, CK_BYTE_PTR pData, CK_ULONG_PTR pulDataLen) 108 { 109 110 CK_RV rv; 111 soft_session_t *session_p; 112 boolean_t lock_held = B_FALSE; 113 114 if (!softtoken_initialized) 115 return (CKR_CRYPTOKI_NOT_INITIALIZED); 116 117 /* Obatin the session pointer. */ 118 rv = handle2session(hSession, &session_p); 119 if (rv != CKR_OK) 120 return (rv); 121 122 /* 123 * Only check if input buffer is null. How to handle zero input 124 * length depents on the mechanism in use. For secret key mechanisms, 125 * unpadded ones yield zero length output, but padded ones always 126 * result in smaller than original, possibly zero, length output. 127 */ 128 if (pEncryptedData == NULL) { 129 rv = CKR_ARGUMENTS_BAD; 130 goto clean_exit; 131 } 132 133 /* 134 * No need to check pData because application might 135 * just want to know the length of decrypted data. 136 */ 137 if (pulDataLen == NULL) { 138 rv = CKR_ARGUMENTS_BAD; 139 goto clean_exit; 140 } 141 142 (void) pthread_mutex_lock(&session_p->session_mutex); 143 lock_held = B_TRUE; 144 145 /* Application must call C_DecryptInit before calling C_Decrypt. */ 146 if (!(session_p->decrypt.flags & CRYPTO_OPERATION_ACTIVE)) { 147 SES_REFRELE(session_p, lock_held); 148 return (CKR_OPERATION_NOT_INITIALIZED); 149 } 150 151 /* 152 * C_Decrypt must be called without intervening C_DecryptUpdate 153 * calls. 154 */ 155 if (session_p->decrypt.flags & CRYPTO_OPERATION_UPDATE) { 156 /* 157 * C_Decrypt can not be used to terminate a multi-part 158 * operation, so we'll leave the active decrypt operation 159 * flag on and let the application continue with the 160 * decrypt update operation. 161 */ 162 SES_REFRELE(session_p, lock_held); 163 return (CKR_FUNCTION_FAILED); 164 } 165 166 (void) pthread_mutex_unlock(&session_p->session_mutex); 167 lock_held = B_FALSE; 168 169 rv = soft_decrypt(session_p, pEncryptedData, ulEncryptedDataLen, 170 pData, pulDataLen); 171 172 if ((rv == CKR_BUFFER_TOO_SMALL) || 173 (pData == NULL && rv == CKR_OK)) { 174 /* 175 * We will not terminate the active decrypt operation flag, 176 * when the application-supplied buffer is too small, or 177 * the application asks for the length of buffer to hold 178 * the plaintext. 179 */ 180 SES_REFRELE(session_p, lock_held); 181 return (rv); 182 } 183 184 clean_exit: 185 /* Clear context, free key, and release session counter */ 186 soft_crypt_cleanup(session_p, B_FALSE, B_FALSE); 187 188 return (rv); 189 } 190 191 192 CK_RV 193 C_DecryptUpdate(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pEncryptedPart, 194 CK_ULONG ulEncryptedPartLen, CK_BYTE_PTR pPart, 195 CK_ULONG_PTR pulPartLen) 196 { 197 198 CK_RV rv; 199 soft_session_t *session_p; 200 boolean_t lock_held = B_FALSE; 201 202 if (!softtoken_initialized) 203 return (CKR_CRYPTOKI_NOT_INITIALIZED); 204 205 /* Obtain the session pointer. */ 206 rv = handle2session(hSession, &session_p); 207 if (rv != CKR_OK) 208 return (rv); 209 210 /* 211 * Only check if input buffer is null. How to handle zero input 212 * length depents on the mechanism in use. For secret key mechanisms, 213 * unpadded ones yeild zero length output, but padded ones always 214 * result in smaller than original, possibly zero, length output. 215 */ 216 if (pEncryptedPart == NULL) { 217 rv = CKR_ARGUMENTS_BAD; 218 goto clean_exit; 219 } 220 221 /* 222 * Only check if pulPartLen is NULL. 223 * No need to check if pPart is NULL because application 224 * might just ask for the length of buffer to hold the 225 * recovered data. 226 */ 227 if (pulPartLen == NULL) { 228 rv = CKR_ARGUMENTS_BAD; 229 goto clean_exit; 230 } 231 232 (void) pthread_mutex_lock(&session_p->session_mutex); 233 lock_held = B_TRUE; 234 235 /* 236 * Application must call C_DecryptInit before calling 237 * C_DecryptUpdate. 238 */ 239 if (!(session_p->decrypt.flags & CRYPTO_OPERATION_ACTIVE)) { 240 SES_REFRELE(session_p, lock_held); 241 return (CKR_OPERATION_NOT_INITIALIZED); 242 } 243 244 session_p->decrypt.flags |= CRYPTO_OPERATION_UPDATE; 245 246 (void) pthread_mutex_unlock(&session_p->session_mutex); 247 lock_held = B_FALSE; 248 249 rv = soft_decrypt_update(session_p, pEncryptedPart, 250 ulEncryptedPartLen, pPart, pulPartLen); 251 252 /* 253 * If CKR_OK or CKR_BUFFER_TOO_SMALL, don't terminate the 254 * current decryption operation. 255 */ 256 if ((rv == CKR_OK) || (rv == CKR_BUFFER_TOO_SMALL)) { 257 SES_REFRELE(session_p, lock_held); 258 return (rv); 259 } 260 261 clean_exit: 262 /* 263 * After an error occurred, terminate the current decrypt 264 * operation by resetting the active and update flags. 265 */ 266 soft_crypt_cleanup(session_p, B_FALSE, lock_held); 267 268 return (rv); 269 } 270 271 CK_RV 272 C_DecryptFinal(CK_SESSION_HANDLE hSession, CK_BYTE_PTR pLastPart, 273 CK_ULONG_PTR pulLastPartLen) 274 { 275 276 CK_RV rv; 277 soft_session_t *session_p; 278 boolean_t lock_held = B_FALSE; 279 280 if (!softtoken_initialized) 281 return (CKR_CRYPTOKI_NOT_INITIALIZED); 282 283 /* Obtain the session pointer. */ 284 rv = handle2session(hSession, &session_p); 285 if (rv != CKR_OK) 286 return (rv); 287 288 if (pulLastPartLen == NULL) { 289 rv = CKR_ARGUMENTS_BAD; 290 goto clean_exit; 291 } 292 293 (void) pthread_mutex_lock(&session_p->session_mutex); 294 lock_held = B_TRUE; 295 296 /* 297 * Application must call C_DecryptInit before calling 298 * C_DecryptFinal. 299 */ 300 if (!(session_p->decrypt.flags & CRYPTO_OPERATION_ACTIVE)) { 301 SES_REFRELE(session_p, lock_held); 302 return (CKR_OPERATION_NOT_INITIALIZED); 303 } 304 305 (void) pthread_mutex_unlock(&session_p->session_mutex); 306 lock_held = B_FALSE; 307 308 rv = soft_decrypt_final(session_p, pLastPart, pulLastPartLen); 309 310 if ((rv == CKR_BUFFER_TOO_SMALL) || 311 (pLastPart == NULL && rv == CKR_OK)) { 312 /* 313 * We will not terminate the active decrypt operation flag, 314 * when the application-supplied buffer is too small, or 315 * the application asks for the length of buffer to hold 316 * the plaintext. 317 */ 318 SES_REFRELE(session_p, lock_held); 319 return (rv); 320 } 321 322 /* Terminates the active encrypt operation. */ 323 (void) pthread_mutex_lock(&session_p->session_mutex); 324 session_p->decrypt.flags = 0; 325 lock_held = B_TRUE; 326 SES_REFRELE(session_p, lock_held); 327 return (rv); 328 329 clean_exit: 330 /* Terminates the active decrypt operation */ 331 soft_crypt_cleanup(session_p, B_FALSE, lock_held); 332 333 return (rv); 334 } 335