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platform_hardware_libhardware/include/hardware/keymaster_defs.h
Shawn Willden dc0007bdb4 Change per-boot tag and remove rescope auth timeout tag. 
Change the boolean KM_TAG_SINGLE_USE_PER_BOOT to an integer-valued
KM_TAG_USES_PER_BOOT.  This makes it more flexible without changing
implementation complexity.

Remove KM_TAG_RESCOPE_AUTH_TIMEOUT because there's no clear use case and
it seems unnecessarily complex.

Change-Id: Iad1512f5cc80f517e5ea7622288179c162bed2ad
2015-01-23 13:47:59 -07:00

610 lines
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/*
* Copyright (C) 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ANDROID_HARDWARE_KEYMASTER_DEFS_H
#define ANDROID_HARDWARE_KEYMASTER_DEFS_H
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#if defined(__cplusplus)
extern "C" {
#endif // defined(__cplusplus)
/*!
* \deprecated Flags for keymaster_device::flags
*
* keymaster_device::flags is deprecated and will be removed in the
* next version of the API in favor of the more detailed information
* available from TODO:
*/
enum {
/*
* Indicates this keymaster implementation does not have hardware that
* keeps private keys out of user space.
*
* This should not be implemented on anything other than the default
* implementation.
*/
KEYMASTER_SOFTWARE_ONLY = 1 << 0,
/*
* This indicates that the key blobs returned via all the primitives
* are sufficient to operate on their own without the trusted OS
* querying userspace to retrieve some other data. Key blobs of
* this type are normally returned encrypted with a
* Key Encryption Key (KEK).
*
* This is currently used by "vold" to know whether the whole disk
* encryption secret can be unwrapped without having some external
* service started up beforehand since the "/data" partition will
* be unavailable at that point.
*/
KEYMASTER_BLOBS_ARE_STANDALONE = 1 << 1,
/*
* Indicates that the keymaster module supports DSA keys.
*/
KEYMASTER_SUPPORTS_DSA = 1 << 2,
/*
* Indicates that the keymaster module supports EC keys.
*/
KEYMASTER_SUPPORTS_EC = 1 << 3,
};
/**
* \deprecated Asymmetric key pair types.
*/
typedef enum {
TYPE_RSA = 1,
TYPE_DSA = 2,
TYPE_EC = 3,
} keymaster_keypair_t;
/**
* Authorization tags each have an associated type. This enumeration facilitates tagging each with
* a type, by using the high four bits (of an implied 32-bit unsigned enum value) to specify up to
* 16 data types. These values are ORed with tag IDs to generate the final tag ID values.
*/
typedef enum {
KM_INVALID = 0 << 28, /* Invalid type, used to designate a tag as uninitialized */
KM_ENUM = 1 << 28,
KM_ENUM_REP = 2 << 28, /* Repeatable enumeration value. */
KM_INT = 3 << 28,
KM_INT_REP = 4 << 28, /* Repeatable integer value */
KM_LONG = 5 << 28,
KM_DATE = 6 << 28,
KM_BOOL = 7 << 28,
KM_BIGNUM = 8 << 28,
KM_BYTES = 9 << 28,
} keymaster_tag_type_t;
typedef enum {
KM_TAG_INVALID = KM_INVALID | 0,
/*
* Tags that must be semantically enforced by hardware and software implementations.
*/
/* Crypto parameters */
KM_TAG_PURPOSE = KM_ENUM_REP | 1, /* keymaster_purpose_t. */
KM_TAG_ALGORITHM = KM_ENUM | 2, /* keymaster_algorithm_t. */
KM_TAG_KEY_SIZE = KM_INT | 3, /* Key size in bits. */
KM_TAG_BLOCK_MODE = KM_ENUM | 4, /* keymaster_block_mode_t. */
KM_TAG_DIGEST = KM_ENUM | 5, /* keymaster_digest_t. */
KM_TAG_MAC_LENGTH = KM_INT | 6, /* MAC length in bits. */
KM_TAG_PADDING = KM_ENUM | 7, /* keymaster_padding_t. */
KM_TAG_CHUNK_LENGTH = KM_INT | 8, /* AEAD mode minimum decryption chunk size, in bytes. */
KM_TAG_NONCE = KM_BYTES | 9, /* Nonce or Initialization Vector */
/* Other hardware-enforced. */
KM_TAG_RESCOPING_ADD = KM_ENUM_REP | 101, /* Tags authorized for addition via rescoping. */
KM_TAG_RESCOPING_DEL = KM_ENUM_REP | 102, /* Tags authorized for removal via rescoping. */
KM_TAG_BLOB_USAGE_REQUIREMENTS = KM_ENUM | 705, /* keymaster_key_blob_usage_requirements_t */
/* Algorithm-specific. */
KM_TAG_RSA_PUBLIC_EXPONENT = KM_LONG | 200, /* Defaults to 2^16+1 */
KM_TAG_DSA_GENERATOR = KM_BIGNUM | 201,
KM_TAG_DSA_P = KM_BIGNUM | 202,
KM_TAG_DSA_Q = KM_BIGNUM | 203,
/* Note there are no EC-specific params. Field size is defined by KM_TAG_KEY_SIZE, and the
curve is chosen from NIST recommendations for field size */
/*
* Tags that should be semantically enforced by hardware if possible and will otherwise be
* enforced by software (keystore).
*/
/* Key validity period */
KM_TAG_ACTIVE_DATETIME = KM_DATE | 400, /* Start of validity */
KM_TAG_ORIGINATION_EXPIRE_DATETIME = KM_DATE | 401, /* Date when new "messages" should no
longer be created. */
KM_TAG_USAGE_EXPIRE_DATETIME = KM_DATE | 402, /* Date when existing "messages" should no
longer be trusted. */
KM_TAG_MIN_SECONDS_BETWEEN_OPS = KM_INT | 403, /* Minimum elapsed time between
cryptographic operations with the key. */
KM_TAG_MAX_USES_PER_BOOT = KM_INT | 404, /* Number of times the key can be used per
boot. */
/* User authentication */
KM_TAG_ALL_USERS = KM_BOOL | 500, /* If key is usable by all users. */
KM_TAG_USER_ID = KM_INT | 501, /* ID of authorized user. Disallowed if
KM_TAG_ALL_USERS is present. */
KM_TAG_NO_AUTH_REQUIRED = KM_BOOL | 502, /* If key is usable without authentication. */
KM_TAG_USER_AUTH_ID = KM_INT_REP | 503, /* ID of the authenticator to use (e.g. password,
fingerprint, etc.). Repeatable to support
multi-factor auth. Disallowed if
KM_TAG_NO_AUTH_REQUIRED is present. */
KM_TAG_AUTH_TIMEOUT = KM_INT | 504, /* Required freshness of user authentication for
private/secret key operations, in seconds.
Public key operations require no authentication.
If absent, authentication is required for every
use. Authentication state is lost when the
device is powered off. */
/* Application access control */
KM_TAG_ALL_APPLICATIONS = KM_BOOL | 600, /* If key is usable by all applications. */
KM_TAG_APPLICATION_ID = KM_BYTES | 601, /* ID of authorized application. Disallowed if
KM_TAG_ALL_APPLICATIONS is present. */
/*
* Semantically unenforceable tags, either because they have no specific meaning or because
* they're informational only.
*/
KM_TAG_APPLICATION_DATA = KM_BYTES | 700, /* Data provided by authorized application. */
KM_TAG_CREATION_DATETIME = KM_DATE | 701, /* Key creation time */
KM_TAG_ORIGIN = KM_ENUM | 702, /* keymaster_key_origin_t. */
KM_TAG_ROLLBACK_RESISTANT = KM_BOOL | 703, /* Whether key is rollback-resistant. */
KM_TAG_ROOT_OF_TRUST = KM_BYTES | 704, /* Root of trust ID. Empty array means usable by all
roots. */
/* Tags used only to provide data to operations */
KM_TAG_ADDITIONAL_DATA = KM_BYTES | 1000, /* Used to provide additional data for AEAD modes. */
} keymaster_tag_t;
/**
* Algorithms that may be provided by keymaster implementations. Those that must be provided by all
* implementations are tagged as "required". Note that where the values in this enumeration overlap
* with the values for the deprecated keymaster_keypair_t, the same algorithm must be
* specified. This type is new in 0_4 and replaces the deprecated keymaster_keypair_t.
*/
typedef enum {
/* Asymmetric algorithms. */
KM_ALGORITHM_RSA = 1, /* required */
KM_ALGORITHM_DSA = 2, /* required */
KM_ALGORITHM_ECDSA = 3, /* required */
KM_ALGORITHM_ECIES = 4,
/* FIPS Approved Ciphers */
KM_ALGORITHM_AES = 32, /* required */
KM_ALGORITHM_3DES = 33,
KM_ALGORITHM_SKIPJACK = 34,
/* AES Finalists */
KM_ALGORITHM_MARS = 48,
KM_ALGORITHM_RC6 = 49,
KM_ALGORITHM_SERPENT = 50,
KM_ALGORITHM_TWOFISH = 51,
/* Other common block ciphers */
KM_ALGORITHM_IDEA = 52,
KM_ALGORITHM_RC5 = 53,
KM_ALGORITHM_CAST5 = 54,
KM_ALGORITHM_BLOWFISH = 55,
/* Common stream ciphers */
KM_ALGORITHM_RC4 = 64,
KM_ALGORITHM_CHACHA20 = 65,
/* MAC algorithms */
KM_ALGORITHM_HMAC = 128, /* required */
} keymaster_algorithm_t;
/**
* Symmetric block cipher modes that may be provided by keymaster implementations. Those that must
* be provided by all implementations are tagged as "required". This type is new in 0_4.
*
* KM_MODE_FIRST_UNAUTHENTICATED, KM_MODE_FIRST_AUTHENTICATED and KM_MODE_FIRST_MAC are not modes,
* but markers used to separate the available modes into classes.
*/
typedef enum {
/* Unauthenticated modes, usable only for encryption/decryption and not generally recommended
* except for compatibility with existing other protocols. */
KM_MODE_FIRST_UNAUTHENTICATED = 1,
KM_MODE_ECB = KM_MODE_FIRST_UNAUTHENTICATED, /* required */
KM_MODE_CBC = 2, /* required */
KM_MODE_CBC_CTS = 3, /* recommended */
KM_MODE_CTR = 4, /* recommended */
KM_MODE_OFB = 5,
KM_MODE_CFB = 6,
KM_MODE_XTS = 7, /* Note: requires double-length keys */
/* Authenticated modes, usable for encryption/decryption and signing/verification. Recommended
* over unauthenticated modes for all purposes. One of KM_MODE_GCM and KM_MODE_OCB is
* required. */
KM_MODE_FIRST_AUTHENTICATED = 32,
KM_MODE_GCM = KM_MODE_FIRST_AUTHENTICATED,
KM_MODE_OCB = 33,
KM_MODE_CCM = 34,
/* MAC modes -- only for signing/verification */
KM_MODE_FIRST_MAC = 128,
KM_MODE_CMAC = KM_MODE_FIRST_MAC,
KM_MODE_POLY1305 = 129,
} keymaster_block_mode_t;
/**
* Padding modes that may be applied to plaintext for encryption operations. This list includes
* padding modes for both symmetric and asymmetric algorithms. Note that implementations should not
* provide all possible combinations of algorithm and padding, only the
* cryptographically-appropriate pairs.
*/
typedef enum {
KM_PAD_NONE = 1, /* required, deprecated */
KM_PAD_RSA_OAEP = 2, /* required */
KM_PAD_RSA_PSS = 3, /* required */
KM_PAD_RSA_PKCS1_1_5_ENCRYPT = 4,
KM_PAD_RSA_PKCS1_1_5_SIGN = 5,
KM_PAD_ANSI_X923 = 32,
KM_PAD_ISO_10126 = 33,
KM_PAD_ZERO = 64, /* required */
KM_PAD_PKCS7 = 65, /* required */
KM_PAD_ISO_7816_4 = 66,
} keymaster_padding_t;
/**
* Digests that may be provided by keymaster implementations. Those that must be provided by all
* implementations are tagged as "required". Those that have been added since version 0_2 of the
* API are tagged as "new".
*/
typedef enum {
KM_DIGEST_NONE = 0, /* new, required */
DIGEST_NONE = KM_DIGEST_NONE, /* For 0_2 compatibility */
KM_DIGEST_MD5 = 1, /* new, for compatibility with old protocols only */
KM_DIGEST_SHA1 = 2, /* new */
KM_DIGEST_SHA_2_224 = 3, /* new */
KM_DIGEST_SHA_2_256 = 4, /* new, required */
KM_DIGEST_SHA_2_384 = 5, /* new, recommended */
KM_DIGEST_SHA_2_512 = 6, /* new, recommended */
KM_DIGEST_SHA_3_256 = 7, /* new */
KM_DIGEST_SHA_3_384 = 8, /* new */
KM_DIGEST_SHA_3_512 = 9, /* new */
} keymaster_digest_t;
/**
* The origin of a key (or pair), i.e. where it was generated. Origin and can be used together to
* determine whether a key may have existed outside of secure hardware. This type is new in 0_4.
*/
typedef enum {
KM_ORIGIN_HARDWARE = 0, /* Generated in secure hardware */
KM_ORIGIN_SOFTWARE = 1, /* Generated in non-secure software */
KM_ORIGIN_IMPORTED = 2, /* Imported, origin unknown */
} keymaster_key_origin_t;
/**
* Usability requirements of key blobs. This defines what system functionality must be available
* for the key to function. For example, key "blobs" which are actually handles referencing
* encrypted key material stored in the file system cannot be used until the file system is
* available, and should have BLOB_REQUIRES_FILE_SYSTEM. Other requirements entries will be added
* as needed for implementations. This type is new in 0_4.
*/
typedef enum {
KM_BLOB_STANDALONE = 0,
KM_BLOB_REQUIRES_FILE_SYSTEM = 1,
} keymaster_key_blob_usage_requirements_t;
/**
* Possible purposes of a key (or pair). This type is new in 0_4.
*/
typedef enum {
KM_PURPOSE_ENCRYPT = 0,
KM_PURPOSE_DECRYPT = 1,
KM_PURPOSE_SIGN = 2,
KM_PURPOSE_VERIFY = 3,
} keymaster_purpose_t;
typedef struct {
const uint8_t* data;
size_t data_length;
} keymaster_blob_t;
typedef struct {
keymaster_tag_t tag;
union {
uint32_t enumerated; /* KM_ENUM and KM_ENUM_REP */
bool boolean; /* KM_BOOL */
uint32_t integer; /* KM_INT and KM_INT_REP */
uint64_t long_integer; /* KM_LONG */
uint64_t date_time; /* KM_DATE */
keymaster_blob_t blob; /* KM_BIGNUM and KM_BYTES*/
};
} keymaster_key_param_t;
typedef struct {
keymaster_key_param_t* params; /* may be NULL if length == 0 */
size_t length;
} keymaster_key_param_set_t;
/**
* Parameters that define a key's characteristics, including authorized modes of usage and access
* control restrictions. The parameters are divided into two categories, those that are enforced by
* secure hardware, and those that are not. For a software-only keymaster implementation the
* enforced array must NULL. Hardware implementations must enforce everything in the enforced
* array.
*/
typedef struct {
keymaster_key_param_set_t hw_enforced;
keymaster_key_param_set_t sw_enforced;
} keymaster_key_characteristics_t;
typedef struct {
const uint8_t* key_material;
size_t key_material_size;
} keymaster_key_blob_t;
/**
* Formats for key import and export. At present, only asymmetric key import/export is supported.
* In the future this list will expand greatly to accommodate asymmetric key import/export.
*/
typedef enum {
KM_KEY_FORMAT_X509, /* for public key export, required */
KM_KEY_FORMAT_PKCS8, /* for asymmetric key pair import, required */
KM_KEY_FORMAT_PKCS12, /* for asymmetric key pair import, not required */
} keymaster_key_format_t;
/**
* The keymaster operation API consists of begin, update, finish and abort. This is the type of the
* handle used to tie the sequence of calls together. A 64-bit value is used because it's important
* that handles not be predictable. Implementations must use strong random numbers for handle
* values.
*/
typedef uint64_t keymaster_operation_handle_t;
typedef enum {
KM_ERROR_OK = 0,
KM_ERROR_ROOT_OF_TRUST_ALREADY_SET = -1,
KM_ERROR_UNSUPPORTED_PURPOSE = -2,
KM_ERROR_INCOMPATIBLE_PURPOSE = -3,
KM_ERROR_UNSUPPORTED_ALGORITHM = -4,
KM_ERROR_INCOMPATIBLE_ALGORITHM = -5,
KM_ERROR_UNSUPPORTED_KEY_SIZE = -6,
KM_ERROR_UNSUPPORTED_BLOCK_MODE = -7,
KM_ERROR_INCOMPATIBLE_BLOCK_MODE = -8,
KM_ERROR_UNSUPPORTED_TAG_LENGTH = -9,
KM_ERROR_UNSUPPORTED_PADDING_MODE = -10,
KM_ERROR_INCOMPATIBLE_PADDING_MODE = -11,
KM_ERROR_UNSUPPORTED_DIGEST = -12,
KM_ERROR_INCOMPATIBLE_DIGEST = -13,
KM_ERROR_INVALID_EXPIRATION_TIME = -14,
KM_ERROR_INVALID_USER_ID = -15,
KM_ERROR_INVALID_AUTHORIZATION_TIMEOUT = -16,
KM_ERROR_UNSUPPORTED_KEY_FORMAT = -17,
KM_ERROR_INCOMPATIBLE_KEY_FORMAT = -18,
KM_ERROR_UNSUPPORTED_KEY_ENCRYPTION_ALGORITHM = -19, /* For PKCS8 & PKCS12 */
KM_ERROR_UNSUPPORTED_KEY_VERIFICATION_ALGORITHM = -20, /* For PKCS8 & PKCS12 */
KM_ERROR_INVALID_INPUT_LENGTH = -21,
KM_ERROR_KEY_EXPORT_OPTIONS_INVALID = -22,
KM_ERROR_DELEGATION_NOT_ALLOWED = -23,
KM_ERROR_KEY_NOT_YET_VALID = -24,
KM_ERROR_KEY_EXPIRED = -25,
KM_ERROR_KEY_USER_NOT_AUTHENTICATED = -26,
KM_ERROR_OUTPUT_PARAMETER_NULL = -27,
KM_ERROR_INVALID_OPERATION_HANDLE = -28,
KM_ERROR_INSUFFICIENT_BUFFER_SPACE = -29,
KM_ERROR_VERIFICATION_FAILED = -30,
KM_ERROR_TOO_MANY_OPERATIONS = -31,
KM_ERROR_UNEXPECTED_NULL_POINTER = -32,
KM_ERROR_INVALID_KEY_BLOB = -33,
KM_ERROR_IMPORTED_KEY_NOT_ENCRYPTED = -34,
KM_ERROR_IMPORTED_KEY_DECRYPTION_FAILED = -35,
KM_ERROR_IMPORTED_KEY_NOT_SIGNED = -36,
KM_ERROR_IMPORTED_KEY_VERIFICATION_FAILED = -37,
KM_ERROR_INVALID_ARGUMENT = -38,
KM_ERROR_UNSUPPORTED_TAG = -39,
KM_ERROR_INVALID_TAG = -40,
KM_ERROR_MEMORY_ALLOCATION_FAILED = -41,
KM_ERROR_INVALID_RESCOPING = -42,
KM_ERROR_INVALID_DSA_PARAMS = -43,
KM_ERROR_IMPORT_PARAMETER_MISMATCH = -44,
KM_ERROR_SECURE_HW_ACCESS_DENIED = -45,
KM_ERROR_OPERATION_CANCELLED = -46,
KM_ERROR_CONCURRENT_ACCESS_CONFLICT = -47,
KM_ERROR_SECURE_HW_BUSY = -48,
KM_ERROR_SECURE_HW_COMMUNICATION_FAILED = -49,
KM_ERROR_UNSUPPORTED_EC_FIELD = -50,
KM_ERROR_UNIMPLEMENTED = -100,
KM_ERROR_VERSION_MISMATCH = -101,
/* Additional error codes may be added by implementations, but implementers should coordinate
* with Google to avoid code collision. */
KM_ERROR_UNKNOWN_ERROR = -1000,
} keymaster_error_t;
/**
* \deprecated Parameters needed to generate an RSA key.
*/
typedef struct {
uint32_t modulus_size; /* bits */
uint64_t public_exponent;
} keymaster_rsa_keygen_params_t;
/**
* \deprecated Parameters needed to generate a DSA key.
*/
typedef struct {
uint32_t key_size; /* bits */
uint32_t generator_len;
uint32_t prime_p_len;
uint32_t prime_q_len;
const uint8_t* generator;
const uint8_t* prime_p;
const uint8_t* prime_q;
} keymaster_dsa_keygen_params_t;
/**
* \deprecated Parameters needed to generate an EC key.
*
* Field size is the only parameter in version 4. The sizes correspond to these required curves:
*
* 192 = NIST P-192
* 224 = NIST P-224
* 256 = NIST P-256
* 384 = NIST P-384
* 521 = NIST P-521
*
* The parameters for these curves are available at: http://www.nsa.gov/ia/_files/nist-routines.pdf
* in Chapter 4.
*/
typedef struct { uint32_t field_size; /* bits */ } keymaster_ec_keygen_params_t;
/**
* \deprecated Type of padding used for RSA operations.
*/
typedef enum {
PADDING_NONE,
} keymaster_rsa_padding_t;
/**
* \deprecated
*/
typedef struct { keymaster_digest_t digest_type; } keymaster_dsa_sign_params_t;
/**
* \deprecated
*/
typedef struct { keymaster_digest_t digest_type; } keymaster_ec_sign_params_t;
/**
*\deprecated
*/
typedef struct {
keymaster_digest_t digest_type;
keymaster_rsa_padding_t padding_type;
} keymaster_rsa_sign_params_t;
/* Convenience functions for manipulating keymaster tag types */
static inline keymaster_tag_type_t keymaster_tag_get_type(keymaster_tag_t tag) {
return (keymaster_tag_type_t)(tag & (0xF << 28));
}
static inline uint32_t keymaster_tag_mask_type(keymaster_tag_t tag) {
return tag & 0x0FFFFFFF;
}
static inline bool keymaster_tag_type_repeatable(keymaster_tag_type_t type) {
switch (type) {
case KM_INT_REP:
case KM_ENUM_REP:
return true;
default:
return false;
}
}
static inline bool keymaster_tag_repeatable(keymaster_tag_t tag) {
return keymaster_tag_type_repeatable(keymaster_tag_get_type(tag));
}
/* Convenience functions for manipulating keymaster_key_param_t structs */
inline keymaster_key_param_t keymaster_param_enum(keymaster_tag_t tag, uint32_t value) {
// assert(keymaster_tag_get_type(tag) == KM_ENUM || keymaster_tag_get_type(tag) == KM_ENUM_REP);
keymaster_key_param_t param;
memset(&param, 0, sizeof(param));
param.tag = tag;
param.enumerated = value;
return param;
}
inline keymaster_key_param_t keymaster_param_int(keymaster_tag_t tag, uint32_t value) {
// assert(keymaster_tag_get_type(tag) == KM_INT || keymaster_tag_get_type(tag) == KM_INT_REP);
keymaster_key_param_t param;
memset(&param, 0, sizeof(param));
param.tag = tag;
param.integer = value;
return param;
}
inline keymaster_key_param_t keymaster_param_long(keymaster_tag_t tag, uint64_t value) {
// assert(keymaster_tag_get_type(tag) == KM_LONG);
keymaster_key_param_t param;
memset(&param, 0, sizeof(param));
param.tag = tag;
param.long_integer = value;
return param;
}
inline keymaster_key_param_t keymaster_param_blob(keymaster_tag_t tag, const uint8_t* bytes,
size_t bytes_len) {
// assert(keymaster_tag_get_type(tag) == KM_BYTES || keymaster_tag_get_type(tag) == KM_BIGNUM);
keymaster_key_param_t param;
memset(&param, 0, sizeof(param));
param.tag = tag;
param.blob.data = (uint8_t*)bytes;
param.blob.data_length = bytes_len;
return param;
}
inline keymaster_key_param_t keymaster_param_bool(keymaster_tag_t tag) {
// assert(keymaster_tag_get_type(tag) == KM_BOOL);
keymaster_key_param_t param;
memset(&param, 0, sizeof(param));
param.tag = tag;
param.boolean = true;
return param;
}
inline keymaster_key_param_t keymaster_param_date(keymaster_tag_t tag, uint64_t value) {
// assert(keymaster_tag_get_type(tag) == KM_DATE);
keymaster_key_param_t param;
memset(&param, 0, sizeof(param));
param.tag = tag;
param.date_time = value;
return param;
}
inline void keymaster_free_param_values(keymaster_key_param_t* param, size_t param_count) {
while (param_count-- > 0) {
switch (keymaster_tag_get_type(param->tag)) {
case KM_BIGNUM:
case KM_BYTES:
free((void*)param->blob.data);
param->blob.data = NULL;
break;
default:
// NOP
break;
}
++param;
}
}
inline void keymaster_free_param_set(keymaster_key_param_set_t* set) {
if (set) {
keymaster_free_param_values(set->params, set->length);
free(set->params);
set->params = NULL;
}
}
inline void keymaster_free_characteristics(keymaster_key_characteristics_t* characteristics) {
if (characteristics) {
keymaster_free_param_set(&characteristics->hw_enforced);
keymaster_free_param_set(&characteristics->sw_enforced);
}
}
#if defined(__cplusplus)
} // extern "C"
#endif // defined(__cplusplus)
#endif // ANDROID_HARDWARE_KEYMASTER_DEFS_H
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