text: // SPDX-License-Identifier: BSD-2-Clause
  /*
   * Copyright (c) 2018-2020, Linaro Limited
   */
  
  #include <pkcs11_ta.h>
  #include <string.h>
  #include <tee_internal_api.h>
  #include <util.h>
  
  #include "attributes.h"
  #include "object.h"
  #include "pkcs11_attributes.h"
  #include "pkcs11_helpers.h"
  
  static const char __maybe_unused unknown[] = "<unknown-identifier>";
  
  struct attr_size {
  	uint32_t id;
  	uint32_t size;
  #if CFG_TEE_TA_LOG_LEVEL > 0
  	const char *string;
  #endif
  };
  
  #if CFG_TEE_TA_LOG_LEVEL > 0
  #define PKCS11_ID_SZ(_id, _sz)	\
  			{ .id = (uint32_t)(_id), .size = (_sz), .string = #_id }
  #else
  #define PKCS11_ID_SZ(_id, _sz)	\
  			{ .id = (uint32_t)(_id), .size = (_sz) }
  #endif
  
  static const struct attr_size attr_ids[] = {
  	PKCS11_ID_SZ(PKCS11_CKA_CLASS, 4),
  	PKCS11_ID_SZ(PKCS11_CKA_KEY_TYPE, 4),
  	PKCS11_ID_SZ(PKCS11_CKA_VALUE, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_VALUE_LEN, 4),
  	PKCS11_ID_SZ(PKCS11_CKA_LABEL, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_WRAP_TEMPLATE, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_UNWRAP_TEMPLATE, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_DERIVE_TEMPLATE, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_START_DATE, 4),
  	PKCS11_ID_SZ(PKCS11_CKA_END_DATE, 4),
  	PKCS11_ID_SZ(PKCS11_CKA_OBJECT_ID, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_APPLICATION, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_MECHANISM_TYPE, 4),
  	PKCS11_ID_SZ(PKCS11_CKA_ID, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_ALLOWED_MECHANISMS, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_EC_POINT, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_EC_PARAMS, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_MODULUS, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_MODULUS_BITS, 4),
  	PKCS11_ID_SZ(PKCS11_CKA_PUBLIC_EXPONENT, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_PRIVATE_EXPONENT, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_PRIME_1, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_PRIME_2, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_EXPONENT_1, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_EXPONENT_2, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_COEFFICIENT, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_SUBJECT, 0),
  	PKCS11_ID_SZ(PKCS11_CKA_PUBLIC_KEY_INFO, 0),
  	/* Below are boolean attributes */
  	PKCS11_ID_SZ(PKCS11_CKA_TOKEN, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_PRIVATE, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_TRUSTED, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_SENSITIVE, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_ENCRYPT, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_DECRYPT, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_WRAP, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_UNWRAP, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_SIGN, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_SIGN_RECOVER, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_VERIFY, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_VERIFY_RECOVER, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_DERIVE, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_EXTRACTABLE, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_LOCAL, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_NEVER_EXTRACTABLE, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_ALWAYS_SENSITIVE, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_MODIFIABLE, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_COPYABLE, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_DESTROYABLE, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_ALWAYS_AUTHENTICATE, 1),
  	PKCS11_ID_SZ(PKCS11_CKA_WRAP_WITH_TRUSTED, 1),
  	/* Specific PKCS11 TA internal attribute ID */
  	PKCS11_ID_SZ(PKCS11_CKA_UNDEFINED_ID, 0),
  };
  
  struct any_id {
  	uint32_t id;
  #if CFG_TEE_TA_LOG_LEVEL > 0
  	const char *string;
  #endif
  };
  
  /*
   * Macro PKCS11_ID() can be used to define cells in ID list arrays
   * or ID/string conversion arrays.
   */
  #if CFG_TEE_TA_LOG_LEVEL > 0
  #define PKCS11_ID(_id)		{ .id = _id, .string = #_id }
  #else
  #define PKCS11_ID(_id)		{ .id = _id }
  #endif
  
  #define ID2STR(id, table, prefix)	\
  	id2str(id, table, ARRAY_SIZE(table), prefix)
  
  #if CFG_TEE_TA_LOG_LEVEL > 0
  /* Convert a PKCS11 ID into its label string */
  static const char *id2str(uint32_t id, const struct any_id *table,
  			  size_t count, const char *prefix)
  {
  	size_t n = 0;
  	const char *str = NULL;
  
  	for (n = 0; n < count; n++) {
  		if (id != table[n].id)
  			continue;
  
  		str = table[n].string;
  
  		/* Skip prefix provided matches found */
  		if (prefix && !TEE_MemCompare(str, prefix, strlen(prefix)))
  			str += strlen(prefix);
  
  		return str;
  	}
  
  	return unknown;
  }
  #endif /* CFG_TEE_TA_LOG_LEVEL > 0 */
  
  /*
   * TA command IDs: used only as ID/string conversion for debug trace support
   */
  static const struct any_id __maybe_unused string_ta_cmd[] = {
  	PKCS11_ID(PKCS11_CMD_PING),
  	PKCS11_ID(PKCS11_CMD_SLOT_LIST),
  	PKCS11_ID(PKCS11_CMD_SLOT_INFO),
  	PKCS11_ID(PKCS11_CMD_TOKEN_INFO),
  	PKCS11_ID(PKCS11_CMD_MECHANISM_IDS),
  	PKCS11_ID(PKCS11_CMD_MECHANISM_INFO),
  	PKCS11_ID(PKCS11_CMD_OPEN_SESSION),
  	PKCS11_ID(PKCS11_CMD_SESSION_INFO),
  	PKCS11_ID(PKCS11_CMD_CLOSE_SESSION),
  	PKCS11_ID(PKCS11_CMD_CLOSE_ALL_SESSIONS),
  	PKCS11_ID(PKCS11_CMD_INIT_TOKEN),
  	PKCS11_ID(PKCS11_CMD_INIT_PIN),
  	PKCS11_ID(PKCS11_CMD_SET_PIN),
  	PKCS11_ID(PKCS11_CMD_LOGIN),
  	PKCS11_ID(PKCS11_CMD_LOGOUT),
  	PKCS11_ID(PKCS11_CMD_CREATE_OBJECT),
  	PKCS11_ID(PKCS11_CMD_DESTROY_OBJECT),
  	PKCS11_ID(PKCS11_CMD_ENCRYPT_INIT),
  	PKCS11_ID(PKCS11_CMD_DECRYPT_INIT),
  	PKCS11_ID(PKCS11_CMD_ENCRYPT_UPDATE),
  	PKCS11_ID(PKCS11_CMD_DECRYPT_UPDATE),
  	PKCS11_ID(PKCS11_CMD_ENCRYPT_FINAL),
  	PKCS11_ID(PKCS11_CMD_DECRYPT_FINAL),
  	PKCS11_ID(PKCS11_CMD_ENCRYPT_ONESHOT),
  	PKCS11_ID(PKCS11_CMD_DECRYPT_ONESHOT),
  	PKCS11_ID(PKCS11_CMD_SIGN_INIT),
  	PKCS11_ID(PKCS11_CMD_VERIFY_INIT),
  	PKCS11_ID(PKCS11_CMD_SIGN_UPDATE),
  	PKCS11_ID(PKCS11_CMD_VERIFY_UPDATE),
  	PKCS11_ID(PKCS11_CMD_SIGN_FINAL),
  	PKCS11_ID(PKCS11_CMD_VERIFY_FINAL),
  	PKCS11_ID(PKCS11_CMD_SIGN_ONESHOT),
  	PKCS11_ID(PKCS11_CMD_VERIFY_ONESHOT),
  	PKCS11_ID(PKCS11_CMD_GENERATE_KEY),
  	PKCS11_ID(PKCS11_CMD_FIND_OBJECTS_INIT),
  	PKCS11_ID(PKCS11_CMD_FIND_OBJECTS),
  	PKCS11_ID(PKCS11_CMD_FIND_OBJECTS_FINAL),
  	PKCS11_ID(PKCS11_CMD_GET_OBJECT_SIZE),
  	PKCS11_ID(PKCS11_CMD_GET_ATTRIBUTE_VALUE),
  };
  
  static const struct any_id __maybe_unused string_slot_flags[] = {
  	PKCS11_ID(PKCS11_CKFS_TOKEN_PRESENT),
  	PKCS11_ID(PKCS11_CKFS_REMOVABLE_DEVICE),
  	PKCS11_ID(PKCS11_CKFS_HW_SLOT),
  };
  
  static const struct any_id __maybe_unused string_token_flags[] = {
  	PKCS11_ID(PKCS11_CKFT_RNG),
  	PKCS11_ID(PKCS11_CKFT_WRITE_PROTECTED),
  	PKCS11_ID(PKCS11_CKFT_LOGIN_REQUIRED),
  	PKCS11_ID(PKCS11_CKFT_USER_PIN_INITIALIZED),
  	PKCS11_ID(PKCS11_CKFT_RESTORE_KEY_NOT_NEEDED),
  	PKCS11_ID(PKCS11_CKFT_CLOCK_ON_TOKEN),
  	PKCS11_ID(PKCS11_CKFT_PROTECTED_AUTHENTICATION_PATH),
  	PKCS11_ID(PKCS11_CKFT_DUAL_CRYPTO_OPERATIONS),
  	PKCS11_ID(PKCS11_CKFT_TOKEN_INITIALIZED),
  	PKCS11_ID(PKCS11_CKFT_USER_PIN_COUNT_LOW),
  	PKCS11_ID(PKCS11_CKFT_USER_PIN_FINAL_TRY),
  	PKCS11_ID(PKCS11_CKFT_USER_PIN_LOCKED),
  	PKCS11_ID(PKCS11_CKFT_USER_PIN_TO_BE_CHANGED),
  	PKCS11_ID(PKCS11_CKFT_SO_PIN_COUNT_LOW),
  	PKCS11_ID(PKCS11_CKFT_SO_PIN_FINAL_TRY),
  	PKCS11_ID(PKCS11_CKFT_SO_PIN_LOCKED),
  	PKCS11_ID(PKCS11_CKFT_SO_PIN_TO_BE_CHANGED),
  	PKCS11_ID(PKCS11_CKFT_ERROR_STATE),
  };
  
  static const struct any_id __maybe_unused string_session_flags[] = {
  	PKCS11_ID(PKCS11_CKFSS_RW_SESSION),
  	PKCS11_ID(PKCS11_CKFSS_SERIAL_SESSION),
  };
  
  static const struct any_id __maybe_unused string_session_state[] = {
  	PKCS11_ID(PKCS11_CKS_RO_PUBLIC_SESSION),
  	PKCS11_ID(PKCS11_CKS_RO_USER_FUNCTIONS),
  	PKCS11_ID(PKCS11_CKS_RW_PUBLIC_SESSION),
  	PKCS11_ID(PKCS11_CKS_RW_USER_FUNCTIONS),
  	PKCS11_ID(PKCS11_CKS_RW_SO_FUNCTIONS),
  };
  
  static const struct any_id __maybe_unused string_rc[] = {
  	PKCS11_ID(PKCS11_CKR_OK),
  	PKCS11_ID(PKCS11_CKR_GENERAL_ERROR),
  	PKCS11_ID(PKCS11_CKR_DEVICE_MEMORY),
  	PKCS11_ID(PKCS11_CKR_ARGUMENTS_BAD),
  	PKCS11_ID(PKCS11_CKR_BUFFER_TOO_SMALL),
  	PKCS11_ID(PKCS11_CKR_FUNCTION_FAILED),
  	PKCS11_ID(PKCS11_CKR_SIGNATURE_INVALID),
  	PKCS11_ID(PKCS11_CKR_ATTRIBUTE_TYPE_INVALID),
  	PKCS11_ID(PKCS11_CKR_ATTRIBUTE_VALUE_INVALID),
  	PKCS11_ID(PKCS11_CKR_OBJECT_HANDLE_INVALID),
  	PKCS11_ID(PKCS11_CKR_KEY_HANDLE_INVALID),
  	PKCS11_ID(PKCS11_CKR_MECHANISM_INVALID),
  	PKCS11_ID(PKCS11_CKR_SESSION_HANDLE_INVALID),
  	PKCS11_ID(PKCS11_CKR_SLOT_ID_INVALID),
  	PKCS11_ID(PKCS11_CKR_MECHANISM_PARAM_INVALID),
  	PKCS11_ID(PKCS11_CKR_TEMPLATE_INCONSISTENT),
  	PKCS11_ID(PKCS11_CKR_TEMPLATE_INCOMPLETE),
  	PKCS11_ID(PKCS11_CKR_PIN_INCORRECT),
  	PKCS11_ID(PKCS11_CKR_PIN_LOCKED),
  	PKCS11_ID(PKCS11_CKR_PIN_EXPIRED),
  	PKCS11_ID(PKCS11_CKR_PIN_INVALID),
  	PKCS11_ID(PKCS11_CKR_PIN_LEN_RANGE),
  	PKCS11_ID(PKCS11_CKR_SESSION_EXISTS),
  	PKCS11_ID(PKCS11_CKR_SESSION_PARALLEL_NOT_SUPPORTED),
  	PKCS11_ID(PKCS11_CKR_SESSION_READ_ONLY),
  	PKCS11_ID(PKCS11_CKR_SESSION_READ_WRITE_SO_EXISTS),
  	PKCS11_ID(PKCS11_CKR_OPERATION_ACTIVE),
  	PKCS11_ID(PKCS11_CKR_KEY_FUNCTION_NOT_PERMITTED),
  	PKCS11_ID(PKCS11_CKR_OPERATION_NOT_INITIALIZED),
  	PKCS11_ID(PKCS11_CKR_TOKEN_WRITE_PROTECTED),
  	PKCS11_ID(PKCS11_CKR_TOKEN_NOT_PRESENT),
  	PKCS11_ID(PKCS11_CKR_TOKEN_NOT_RECOGNIZED),
  	PKCS11_ID(PKCS11_CKR_ACTION_PROHIBITED),
  	PKCS11_ID(PKCS11_CKR_ATTRIBUTE_READ_ONLY),
  	PKCS11_ID(PKCS11_CKR_PIN_TOO_WEAK),
  	PKCS11_ID(PKCS11_CKR_CURVE_NOT_SUPPORTED),
  	PKCS11_ID(PKCS11_CKR_DOMAIN_PARAMS_INVALID),
  	PKCS11_ID(PKCS11_CKR_USER_ALREADY_LOGGED_IN),
  	PKCS11_ID(PKCS11_CKR_USER_ANOTHER_ALREADY_LOGGED_IN),
  	PKCS11_ID(PKCS11_CKR_USER_NOT_LOGGED_IN),
  	PKCS11_ID(PKCS11_CKR_USER_PIN_NOT_INITIALIZED),
  	PKCS11_ID(PKCS11_CKR_USER_TOO_MANY_TYPES),
  	PKCS11_ID(PKCS11_CKR_USER_TYPE_INVALID),
  	PKCS11_ID(PKCS11_CKR_KEY_SIZE_RANGE),
  	PKCS11_ID(PKCS11_CKR_SESSION_READ_ONLY_EXISTS),
  	PKCS11_ID(PKCS11_CKR_SIGNATURE_LEN_RANGE),
  	PKCS11_ID(PKCS11_RV_NOT_FOUND),
  	PKCS11_ID(PKCS11_RV_NOT_IMPLEMENTED),
  };
  
  static const struct any_id __maybe_unused string_class[] = {
  	PKCS11_ID(PKCS11_CKO_SECRET_KEY),
  	PKCS11_ID(PKCS11_CKO_PUBLIC_KEY),
  	PKCS11_ID(PKCS11_CKO_PRIVATE_KEY),
  	PKCS11_ID(PKCS11_CKO_OTP_KEY),
  	PKCS11_ID(PKCS11_CKO_CERTIFICATE),
  	PKCS11_ID(PKCS11_CKO_DATA),
  	PKCS11_ID(PKCS11_CKO_DOMAIN_PARAMETERS),
  	PKCS11_ID(PKCS11_CKO_HW_FEATURE),
  	PKCS11_ID(PKCS11_CKO_MECHANISM),
  	PKCS11_ID(PKCS11_CKO_UNDEFINED_ID)
  };
  
  static const struct any_id __maybe_unused string_key_type[] = {
  	PKCS11_ID(PKCS11_CKK_AES),
  	PKCS11_ID(PKCS11_CKK_GENERIC_SECRET),
  	PKCS11_ID(PKCS11_CKK_MD5_HMAC),
  	PKCS11_ID(PKCS11_CKK_SHA_1_HMAC),
  	PKCS11_ID(PKCS11_CKK_SHA224_HMAC),
  	PKCS11_ID(PKCS11_CKK_SHA256_HMAC),
  	PKCS11_ID(PKCS11_CKK_SHA384_HMAC),
  	PKCS11_ID(PKCS11_CKK_SHA512_HMAC),
  	PKCS11_ID(PKCS11_CKK_EC),
  	PKCS11_ID(PKCS11_CKK_RSA),
  	PKCS11_ID(PKCS11_CKK_UNDEFINED_ID)
  };
  
  /*
   * Processing IDs not exported in the TA API.
   * PKCS11_CKM_* mechanism IDs are looked up from mechanism_string_id().
   */
  static const struct any_id __maybe_unused string_internal_processing[] = {
  	PKCS11_ID(PKCS11_PROCESSING_IMPORT),
  };
  
  static const struct any_id __maybe_unused string_functions[] = {
  	PKCS11_ID(PKCS11_FUNCTION_IMPORT),
  	PKCS11_ID(PKCS11_FUNCTION_ENCRYPT),
  	PKCS11_ID(PKCS11_FUNCTION_DECRYPT),
  	PKCS11_ID(PKCS11_FUNCTION_SIGN),
  	PKCS11_ID(PKCS11_FUNCTION_VERIFY),
  };
  
  /*
   * Conversion between PKCS11 TA and GPD TEE return codes
   */
  enum pkcs11_rc tee2pkcs_error(TEE_Result res)
  {
  	switch (res) {
  	case TEE_SUCCESS:
  		return PKCS11_CKR_OK;
  
  	case TEE_ERROR_BAD_PARAMETERS:
  		return PKCS11_CKR_ARGUMENTS_BAD;
  
  	case TEE_ERROR_OUT_OF_MEMORY:
  		return PKCS11_CKR_DEVICE_MEMORY;
  
  	case TEE_ERROR_SHORT_BUFFER:
  		return PKCS11_CKR_BUFFER_TOO_SMALL;
  
  	case TEE_ERROR_MAC_INVALID:
  	case TEE_ERROR_SIGNATURE_INVALID:
  		return PKCS11_CKR_SIGNATURE_INVALID;
  
  	default:
  		return PKCS11_CKR_GENERAL_ERROR;
  	}
  }
  
  /*
   * Helper functions to analyse PKCS11 identifiers
   */
  
  /* Check attribute ID is known and size matches if fixed */
  bool valid_pkcs11_attribute_id(uint32_t id, uint32_t size)
  {
  	size_t n = 0;
  
  	for (n = 0; n < ARRAY_SIZE(attr_ids); n++)
  		if (id == attr_ids[n].id)
  			return !attr_ids[n].size || size == attr_ids[n].size;
  
  	return false;
  }
  
  size_t pkcs11_attr_is_type(uint32_t attribute_id)
  {
  	enum pkcs11_attr_id id = attribute_id;
  
  	switch (id) {
  	case PKCS11_CKA_KEY_TYPE:
  	case PKCS11_CKA_MECHANISM_TYPE:
  	case PKCS11_CKA_KEY_GEN_MECHANISM:
  		return sizeof(uint32_t);
  	default:
  		return 0;
  	}
  }
  
  bool pkcs11_class_has_type(uint32_t class)
  {
  	enum pkcs11_class_id class_id = class;
  
  	switch (class_id) {
  	case PKCS11_CKO_CERTIFICATE:
  	case PKCS11_CKO_PUBLIC_KEY:
  	case PKCS11_CKO_PRIVATE_KEY:
  	case PKCS11_CKO_SECRET_KEY:
  	case PKCS11_CKO_MECHANISM:
  	case PKCS11_CKO_HW_FEATURE:
  		return true;
  	default:
  		return false;
  	}
  }
  
  bool pkcs11_attr_class_is_key(uint32_t class)
  {
  	enum pkcs11_class_id class_id = class;
  
  	switch (class_id) {
  	case PKCS11_CKO_SECRET_KEY:
  	case PKCS11_CKO_PUBLIC_KEY:
  	case PKCS11_CKO_PRIVATE_KEY:
  		return true;
  	default:
  		return false;
  	}
  }
  
  bool key_type_is_symm_key(uint32_t id)
  {
  	enum pkcs11_key_type key_type = id;
  
  	switch (key_type) {
  	case PKCS11_CKK_AES:
  	case PKCS11_CKK_GENERIC_SECRET:
  	case PKCS11_CKK_MD5_HMAC:
  	case PKCS11_CKK_SHA_1_HMAC:
  	case PKCS11_CKK_SHA224_HMAC:
  	case PKCS11_CKK_SHA256_HMAC:
  	case PKCS11_CKK_SHA384_HMAC:
  	case PKCS11_CKK_SHA512_HMAC:
  		return true;
  	default:
  		return false;
  	}
  }
  
  bool key_type_is_asymm_key(uint32_t id)
  {
  	enum pkcs11_key_type key_type = id;
  
  	switch (key_type) {
  	case PKCS11_CKK_EC:
  	case PKCS11_CKK_RSA:
  		return true;
  	default:
  		return false;
  	}
  }
  
  /*
   * Returns shift position or -1 on error.
   * Mainly used when PKCS11_SHEAD_WITH_BOOLPROPS is enabled
   */
  int pkcs11_attr2boolprop_shift(uint32_t attr)
  {
  	static const uint32_t bpa[] = {
  		[BPA_TOKEN]		= PKCS11_CKA_TOKEN,
  		[BPA_PRIVATE]		= PKCS11_CKA_PRIVATE,
  		[BPA_TRUSTED]		= PKCS11_CKA_TRUSTED,
  		[BPA_SENSITIVE]		= PKCS11_CKA_SENSITIVE,
  		[BPA_ENCRYPT]		= PKCS11_CKA_ENCRYPT,
  		[BPA_DECRYPT]		= PKCS11_CKA_DECRYPT,
  		[BPA_WRAP]		= PKCS11_CKA_WRAP,
  		[BPA_UNWRAP]		= PKCS11_CKA_UNWRAP,
  		[BPA_SIGN]		= PKCS11_CKA_SIGN,
  		[BPA_SIGN_RECOVER]	= PKCS11_CKA_SIGN_RECOVER,
  		[BPA_VERIFY]		= PKCS11_CKA_VERIFY,
  		[BPA_VERIFY_RECOVER]	= PKCS11_CKA_VERIFY_RECOVER,
  		[BPA_DERIVE]		= PKCS11_CKA_DERIVE,
  		[BPA_EXTRACTABLE]	= PKCS11_CKA_EXTRACTABLE,
  		[BPA_LOCAL]		= PKCS11_CKA_LOCAL,
  		[BPA_NEVER_EXTRACTABLE]	= PKCS11_CKA_NEVER_EXTRACTABLE,
  		[BPA_ALWAYS_SENSITIVE]	= PKCS11_CKA_ALWAYS_SENSITIVE,
  		[BPA_MODIFIABLE]	= PKCS11_CKA_MODIFIABLE,
  		[BPA_COPYABLE]		= PKCS11_CKA_COPYABLE,
  		[BPA_DESTROYABLE]	= PKCS11_CKA_DESTROYABLE,
  		[BPA_ALWAYS_AUTHENTICATE] = PKCS11_CKA_ALWAYS_AUTHENTICATE,
  		[BPA_WRAP_WITH_TRUSTED] = PKCS11_CKA_WRAP_WITH_TRUSTED,
  	};
  	size_t pos = 0;
  
  	for (pos = 0; pos < ARRAY_SIZE(bpa); pos++)
  		if (bpa[pos] == attr)
  			return (int)pos;
  
  	return -1;
  }
  
  /* Initialize a TEE attribute for a target PKCS11 TA attribute in an object */
  bool pkcs2tee_load_attr(TEE_Attribute *tee_ref, uint32_t tee_id,
  			struct pkcs11_object *obj,
  			enum pkcs11_attr_id pkcs11_id)
  {
  	void *a_ptr = NULL;
  	uint32_t a_size = 0;
  
  	if (get_attribute_ptr(obj->attributes, pkcs11_id, &a_ptr, &a_size))
  		return false;
  
  	TEE_InitRefAttribute(tee_ref, tee_id, a_ptr, a_size);
  
  	return true;
  }
  
  /*
   * Initialize a TEE attribute with hash of a target PKCS11 TA attribute
   * in an object.
   */
  enum pkcs11_rc pkcs2tee_load_hashed_attr(TEE_Attribute *tee_ref,
  					 uint32_t tee_id,
  					 struct pkcs11_object *obj,
  					 enum pkcs11_attr_id pkcs11_id,
  					 uint32_t tee_algo, void *hash_ptr,
  					 uint32_t *hash_size)
  {
  	TEE_OperationHandle handle = TEE_HANDLE_NULL;
  	void *a_ptr = NULL;
  	uint32_t a_size = 0;
  	enum pkcs11_rc rc = PKCS11_CKR_OK;
  	TEE_Result res = TEE_ERROR_GENERIC;
  
  	rc = get_attribute_ptr(obj->attributes, pkcs11_id, &a_ptr, &a_size);
  	if (rc)
  		return rc;
  
  	res = TEE_AllocateOperation(&handle, tee_algo, TEE_MODE_DIGEST, 0);
  	if (res) {
  		EMSG("TEE_AllocateOperation() failed %#"PRIx32, tee_algo);
  		return tee2pkcs_error(res);
  	}
  
  	res = TEE_DigestDoFinal(handle, a_ptr, a_size, hash_ptr, hash_size);
  	TEE_FreeOperation(handle);
  	if (res) {
  		EMSG("TEE_DigestDoFinal() failed %#"PRIx32, tee_algo);
  		return PKCS11_CKR_FUNCTION_FAILED;
  	}
  
  	TEE_InitRefAttribute(tee_ref, tee_id, hash_ptr, *hash_size);
  
  	return PKCS11_CKR_OK;
  }
  
  /* Easy conversion between PKCS11 TA function of TEE crypto mode */
  void pkcs2tee_mode(uint32_t *tee_id, enum processing_func function)
  {
  	switch (function) {
  	case PKCS11_FUNCTION_ENCRYPT:
  		*tee_id = TEE_MODE_ENCRYPT;
  		break;
  	case PKCS11_FUNCTION_DECRYPT:
  		*tee_id = TEE_MODE_DECRYPT;
  		break;
  	case PKCS11_FUNCTION_SIGN:
  		*tee_id = TEE_MODE_SIGN;
  		break;
  	case PKCS11_FUNCTION_VERIFY:
  		*tee_id = TEE_MODE_VERIFY;
  		break;
  	case PKCS11_FUNCTION_DERIVE:
  		*tee_id = TEE_MODE_DERIVE;
  		break;
  	default:
  		TEE_Panic(function);
  	}
  }
  
  #if CFG_TEE_TA_LOG_LEVEL > 0
  const char *id2str_rc(uint32_t id)
  {
  	return ID2STR(id, string_rc, "PKCS11_CKR_");
  }
  
  const char *id2str_ta_cmd(uint32_t id)
  {
  	return ID2STR(id, string_ta_cmd, NULL);
  }
  
  const char *id2str_slot_flag(uint32_t id)
  {
  	return ID2STR(id, string_slot_flags, "PKCS11_CKFS_");
  }
  
  const char *id2str_token_flag(uint32_t id)
  {
  	return ID2STR(id, string_token_flags, "PKCS11_CKFT_");
  }
  
  const char *id2str_session_flag(uint32_t id)
  {
  	return ID2STR(id, string_session_flags, "PKCS11_CKFSS_");
  }
  
  const char *id2str_session_state(uint32_t id)
  {
  	return ID2STR(id, string_session_state, "PKCS11_CKS_");
  }
  
  const char *id2str_attr(uint32_t id)
  {
  	size_t n = 0;
  
  	for (n = 0; n < ARRAY_SIZE(attr_ids); n++) {
  		if (id == attr_ids[n].id) {
  			/* Skip PKCS11_CKA_ prefix */
  			return attr_ids[n].string + strlen("PKCS11_CKA_");
  		}
  	}
  
  	return unknown;
  }
  
  const char *id2str_class(uint32_t id)
  {
  	return ID2STR(id, string_class, "PKCS11_CKO_");
  }
  
  const char *id2str_type(uint32_t id, uint32_t class)
  {
  	enum pkcs11_class_id class_id = class;
  	enum pkcs11_key_type key_type = id;
  
  	switch (class_id) {
  	case PKCS11_CKO_SECRET_KEY:
  	case PKCS11_CKO_PUBLIC_KEY:
  	case PKCS11_CKO_PRIVATE_KEY:
  		return id2str_key_type(key_type);
  	default:
  		return unknown;
  	}
  }
  
  const char *id2str_key_type(uint32_t id)
  {
  	return ID2STR(id, string_key_type, "PKCS11_CKK_");
  }
  
  const char *id2str_attr_value(uint32_t id, size_t size, void *value)
  {
  	static const char str_true[] = "TRUE";
  	static const char str_false[] = "FALSE";
  	static const char str_unknown[] = "*";
  	uint32_t type = 0;
  
  	if (pkcs11_attr2boolprop_shift(id) >= 0)
  		return *(uint8_t *)value ? str_true : str_false;
  
  	if (size < sizeof(uint32_t))
  		return str_unknown;
  
  	TEE_MemMove(&type, value, sizeof(uint32_t));
  
  	switch (id) {
  	case PKCS11_CKA_CLASS:
  		return id2str_class(type);
  	case PKCS11_CKA_KEY_TYPE:
  		return id2str_key_type(type);
  	case PKCS11_CKA_MECHANISM_TYPE:
  		return id2str_mechanism(type);
  	default:
  		return str_unknown;
  	}
  }
  
  const char *id2str_proc(uint32_t id)
  {
  	const char *str = ID2STR(id, string_internal_processing,
  				 "PKCS11_PROCESSING_");
  
  	if (str != unknown)
  		return str;
  
  	return id2str_mechanism(id);
  }
  
  const char *id2str_function(uint32_t id)
  {
  	return ID2STR(id, string_functions, "PKCS11_FUNCTION_");
  }
  #endif /*CFG_TEE_TA_LOG_LEVEL*/
  