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platform_hardware_libhardware/include/hardware/keymaster_defs.h
Tucker Sylvestro 28a872eb79 Treat all tags as unsigned when comparing them 
All tags are presumed to be unsigned, but some of them have signed
representations that are negative.  This caused problems in
AuthorizationSet.Deduplicate, where TAG_APPLICATION_DATA (signed rep
of -1879047492) was being sorted before TAG_INVALID (0), which was
presumed to always be first in the list.

BUG: 30701680
Change-Id: I67047cee21fd7617248022a4674779fe80d5ddfd
2016-10-05 14:39:39 -04:00

618 lines
25 KiB
C
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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>
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
/**
* 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_UINT = 3 << 28,
KM_UINT_REP = 4 << 28, /* Repeatable integer value */
KM_ULONG = 5 << 28,
KM_DATE = 6 << 28,
KM_BOOL = 7 << 28,
KM_BIGNUM = 8 << 28,
KM_BYTES = 9 << 28,
KM_ULONG_REP = 10 << 28, /* Repeatable long value */
} 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_UINT | 3, /* Key size in bits. */
KM_TAG_BLOCK_MODE = KM_ENUM_REP | 4, /* keymaster_block_mode_t. */
KM_TAG_DIGEST = KM_ENUM_REP | 5, /* keymaster_digest_t. */
KM_TAG_PADDING = KM_ENUM_REP | 6, /* keymaster_padding_t. */
KM_TAG_CALLER_NONCE = KM_BOOL | 7, /* Allow caller to specify nonce or IV. */
KM_TAG_MIN_MAC_LENGTH = KM_UINT | 8, /* Minimum length of MAC or AEAD authentication tag in
* bits. */
KM_TAG_KDF = KM_ENUM_REP | 9, /* keymaster_kdf_t (keymaster2) */
KM_TAG_EC_CURVE = KM_ENUM | 10, /* keymaster_ec_curve_t (keymaster2) */
/* Algorithm-specific. */
KM_TAG_RSA_PUBLIC_EXPONENT = KM_ULONG | 200,
KM_TAG_ECIES_SINGLE_HASH_MODE = KM_BOOL | 201, /* Whether the ephemeral public key is fed into
* the KDF */
KM_TAG_INCLUDE_UNIQUE_ID = KM_BOOL | 202, /* If true, attestation certificates for this key
* will contain an application-scoped and
* time-bounded device-unique ID. (keymaster2) */
/* Other hardware-enforced. */
KM_TAG_BLOB_USAGE_REQUIREMENTS = KM_ENUM | 301, /* keymaster_key_blob_usage_requirements_t */
KM_TAG_BOOTLOADER_ONLY = KM_BOOL | 302, /* Usable only by bootloader */
/*
* 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_UINT | 403, /* Minimum elapsed time between
cryptographic operations with the key. */
KM_TAG_MAX_USES_PER_BOOT = KM_UINT | 404, /* Number of times the key can be used per
boot. */
/* User authentication */
KM_TAG_ALL_USERS = KM_BOOL | 500, /* Reserved for future use -- ignore */
KM_TAG_USER_ID = KM_UINT | 501, /* Reserved for future use -- ignore */
KM_TAG_USER_SECURE_ID = KM_ULONG_REP | 502, /* Secure ID of authorized user or authenticator(s).
Disallowed if KM_TAG_ALL_USERS or
KM_TAG_NO_AUTH_REQUIRED is present. */
KM_TAG_NO_AUTH_REQUIRED = KM_BOOL | 503, /* If key is usable without authentication. */
KM_TAG_USER_AUTH_TYPE = KM_ENUM | 504, /* Bitmask of authenticator types allowed when
* KM_TAG_USER_SECURE_ID contains a secure user ID,
* rather than a secure authenticator ID. Defined in
* hw_authenticator_type_t in hw_auth_token.h. */
KM_TAG_AUTH_TIMEOUT = KM_UINT | 505, /* 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. */
KM_TAG_ALLOW_WHILE_ON_BODY = KM_BOOL | 506, /* Allow key to be used after authentication timeout
* if device is still on-body (requires secure
* on-body sensor. */
/* Application access control */
KM_TAG_ALL_APPLICATIONS = KM_BOOL | 600, /* Specified to indicate key is usable by all
* applications. */
KM_TAG_APPLICATION_ID = KM_BYTES | 601, /* Byte string identifying the authorized
* application. */
KM_TAG_EXPORTABLE = KM_BOOL | 602, /* If true, private/secret key can be exported, but
* only if all access control requirements for use are
* met. (keymaster2) */
/*
* 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. */
KM_TAG_OS_VERSION = KM_UINT | 705, /* Version of system (keymaster2) */
KM_TAG_OS_PATCHLEVEL = KM_UINT | 706, /* Patch level of system (keymaster2) */
KM_TAG_UNIQUE_ID = KM_BYTES | 707, /* Used to provide unique ID in attestation */
KM_TAG_ATTESTATION_CHALLENGE = KM_BYTES | 708, /* Used to provide challenge in attestation */
/* Tags used only to provide data to or receive data from operations */
KM_TAG_ASSOCIATED_DATA = KM_BYTES | 1000, /* Used to provide associated data for AEAD modes. */
KM_TAG_NONCE = KM_BYTES | 1001, /* Nonce or Initialization Vector */
KM_TAG_AUTH_TOKEN = KM_BYTES | 1002, /* Authentication token that proves secure user
authentication has been performed. Structure
defined in hw_auth_token_t in hw_auth_token.h. */
KM_TAG_MAC_LENGTH = KM_UINT | 1003, /* MAC or AEAD authentication tag length in
* bits. */
KM_TAG_RESET_SINCE_ID_ROTATION = KM_BOOL | 1004, /* Whether the device has beeen factory reset
since the last unique ID rotation. Used for
key attestation. */
} keymaster_tag_t;
/**
* Algorithms that may be provided by keymaster implementations. Those that must be provided by all
* implementations are tagged as "required".
*/
typedef enum {
/* Asymmetric algorithms. */
KM_ALGORITHM_RSA = 1,
// KM_ALGORITHM_DSA = 2, -- Removed, do not re-use value 2.
KM_ALGORITHM_EC = 3,
/* Block ciphers algorithms */
KM_ALGORITHM_AES = 32,
/* MAC algorithms */
KM_ALGORITHM_HMAC = 128,
} keymaster_algorithm_t;
/**
* Symmetric block cipher modes provided by keymaster implementations.
*/
typedef enum {
/* Unauthenticated modes, usable only for encryption/decryption and not generally recommended
* except for compatibility with existing other protocols. */
KM_MODE_ECB = 1,
KM_MODE_CBC = 2,
KM_MODE_CTR = 3,
/* Authenticated modes, usable for encryption/decryption and signing/verification. Recommended
* over unauthenticated modes for all purposes. */
KM_MODE_GCM = 32,
} 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, /* deprecated */
KM_PAD_RSA_OAEP = 2,
KM_PAD_RSA_PSS = 3,
KM_PAD_RSA_PKCS1_1_5_ENCRYPT = 4,
KM_PAD_RSA_PKCS1_1_5_SIGN = 5,
KM_PAD_PKCS7 = 64,
} keymaster_padding_t;
/**
* Digests provided by keymaster implementations.
*/
typedef enum {
KM_DIGEST_NONE = 0,
KM_DIGEST_MD5 = 1, /* Optional, may not be implemented in hardware, will be handled in software
* if needed. */
KM_DIGEST_SHA1 = 2,
KM_DIGEST_SHA_2_224 = 3,
KM_DIGEST_SHA_2_256 = 4,
KM_DIGEST_SHA_2_384 = 5,
KM_DIGEST_SHA_2_512 = 6,
} keymaster_digest_t;
/*
* Key derivation functions, mostly used in ECIES.
*/
typedef enum {
/* Do not apply a key derivation function; use the raw agreed key */
KM_KDF_NONE = 0,
/* HKDF defined in RFC 5869 with SHA256 */
KM_KDF_RFC5869_SHA256 = 1,
/* KDF1 defined in ISO 18033-2 with SHA1 */
KM_KDF_ISO18033_2_KDF1_SHA1 = 2,
/* KDF1 defined in ISO 18033-2 with SHA256 */
KM_KDF_ISO18033_2_KDF1_SHA256 = 3,
/* KDF2 defined in ISO 18033-2 with SHA1 */
KM_KDF_ISO18033_2_KDF2_SHA1 = 4,
/* KDF2 defined in ISO 18033-2 with SHA256 */
KM_KDF_ISO18033_2_KDF2_SHA256 = 5,
} keymaster_kdf_t;
/**
* Supported EC curves, used in ECDSA/ECIES.
*/
typedef enum {
KM_EC_CURVE_P_224 = 0,
KM_EC_CURVE_P_256 = 1,
KM_EC_CURVE_P_384 = 2,
KM_EC_CURVE_P_521 = 3,
} keymaster_ec_curve_t;
/**
* The origin of a key (or pair), i.e. where it was generated. Note that KM_TAG_ORIGIN can be found
* in either the hardware-enforced or software-enforced list for a key, indicating whether the key
* is hardware or software-based. Specifically, a key with KM_ORIGIN_GENERATED in the
* hardware-enforced list is guaranteed never to have existed outide the secure hardware.
*/
typedef enum {
KM_ORIGIN_GENERATED = 0, /* Generated in keymaster. Should not exist outside the TEE. */
KM_ORIGIN_DERIVED = 1, /* Derived inside keymaster. Likely exists off-device. */
KM_ORIGIN_IMPORTED = 2, /* Imported into keymaster. Existed as cleartext in Android. */
KM_ORIGIN_UNKNOWN = 3, /* Keymaster did not record origin. This value can only be seen on
* keys in a keymaster0 implementation. The keymaster0 adapter uses
* this value to document the fact that it is unkown whether the key
* was generated inside or imported into keymaster. */
} 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.
*/
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).
*/
typedef enum {
KM_PURPOSE_ENCRYPT = 0, /* Usable with RSA, EC and AES keys. */
KM_PURPOSE_DECRYPT = 1, /* Usable with RSA, EC and AES keys. */
KM_PURPOSE_SIGN = 2, /* Usable with RSA, EC and HMAC keys. */
KM_PURPOSE_VERIFY = 3, /* Usable with RSA, EC and HMAC keys. */
KM_PURPOSE_DERIVE_KEY = 4, /* Usable with EC keys. */
} 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;
typedef struct {
keymaster_blob_t* entries;
size_t entry_count;
} keymaster_cert_chain_t;
typedef enum {
KM_VERIFIED_BOOT_VERIFIED = 0, /* Full chain of trust extending from the bootloader to
* verified partitions, including the bootloader, boot
* partition, and all verified partitions*/
KM_VERIFIED_BOOT_SELF_SIGNED = 1, /* The boot partition has been verified using the embedded
* certificate, and the signature is valid. The bootloader
* displays a warning and the fingerprint of the public
* key before allowing the boot process to continue.*/
KM_VERIFIED_BOOT_UNVERIFIED = 2, /* The device may be freely modified. Device integrity is left
* to the user to verify out-of-band. The bootloader
* displays a warning to the user before allowing the boot
* process to continue */
KM_VERIFIED_BOOT_FAILED = 3, /* The device failed verification. The bootloader displays a
* warning and stops the boot process, so no keymaster
* implementation should ever actually return this value,
* since it should not run. Included here only for
* completeness. */
} keymaster_verified_boot_t;
typedef enum {
KM_SECURITY_LEVEL_SOFTWARE = 0,
KM_SECURITY_LEVEL_TRUSTED_ENVIRONMENT = 1,
} keymaster_security_level_t;
/**
* Formats for key import and export.
*/
typedef enum {
KM_KEY_FORMAT_X509 = 0, /* for public key export */
KM_KEY_FORMAT_PKCS8 = 1, /* for asymmetric key pair import */
KM_KEY_FORMAT_RAW = 3, /* for symmetric key import and export*/
} 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_MAC_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_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_MISSING_NONCE = -51,
KM_ERROR_INVALID_NONCE = -52,
KM_ERROR_MISSING_MAC_LENGTH = -53,
KM_ERROR_KEY_RATE_LIMIT_EXCEEDED = -54,
KM_ERROR_CALLER_NONCE_PROHIBITED = -55,
KM_ERROR_KEY_MAX_OPS_EXCEEDED = -56,
KM_ERROR_INVALID_MAC_LENGTH = -57,
KM_ERROR_MISSING_MIN_MAC_LENGTH = -58,
KM_ERROR_UNSUPPORTED_MIN_MAC_LENGTH = -59,
KM_ERROR_UNSUPPORTED_KDF = -60,
KM_ERROR_UNSUPPORTED_EC_CURVE = -61,
KM_ERROR_KEY_REQUIRES_UPGRADE = -62,
KM_ERROR_ATTESTATION_CHALLENGE_MISSING = -63,
KM_ERROR_KEYMASTER_NOT_CONFIGURED = -64,
KM_ERROR_UNIMPLEMENTED = -100,
KM_ERROR_VERSION_MISMATCH = -101,
KM_ERROR_UNKNOWN_ERROR = -1000,
} keymaster_error_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_UINT_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;
}
#define KEYMASTER_SIMPLE_COMPARE(a, b) (a < b) ? -1 : ((a > b) ? 1 : 0)
inline int keymaster_param_compare(const keymaster_key_param_t* a, const keymaster_key_param_t* b) {
int retval = KEYMASTER_SIMPLE_COMPARE((uint32_t)a->tag, (uint32_t)b->tag);
if (retval != 0)
return retval;
switch (keymaster_tag_get_type(a->tag)) {
case KM_INVALID:
case KM_BOOL:
return 0;
case KM_ENUM:
case KM_ENUM_REP:
return KEYMASTER_SIMPLE_COMPARE(a->enumerated, b->enumerated);
case KM_UINT:
case KM_UINT_REP:
return KEYMASTER_SIMPLE_COMPARE(a->integer, b->integer);
case KM_ULONG:
case KM_ULONG_REP:
return KEYMASTER_SIMPLE_COMPARE(a->long_integer, b->long_integer);
case KM_DATE:
return KEYMASTER_SIMPLE_COMPARE(a->date_time, b->date_time);
case KM_BIGNUM:
case KM_BYTES:
// Handle the empty cases.
if (a->blob.data_length != 0 && b->blob.data_length == 0)
return -1;
if (a->blob.data_length == 0 && b->blob.data_length == 0)
return 0;
if (a->blob.data_length == 0 && b->blob.data_length > 0)
return 1;
retval = memcmp(a->blob.data, b->blob.data, a->blob.data_length < b->blob.data_length
? a->blob.data_length
: b->blob.data_length);
if (retval != 0)
return retval;
else if (a->blob.data_length != b->blob.data_length) {
// Equal up to the common length; longer one is larger.
if (a->blob.data_length < b->blob.data_length)
return -1;
if (a->blob.data_length > b->blob.data_length)
return 1;
};
}
return 0;
}
#undef KEYMASTER_SIMPLE_COMPARE
inline void keymaster_free_param_values(keymaster_key_param_t* param, size_t param_count) {
while (param_count > 0) {
param_count--;
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;
set->length = 0;
}
}
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);
}
}
inline void keymaster_free_cert_chain(keymaster_cert_chain_t* chain) {
if (chain) {
for (size_t i = 0; i < chain->entry_count; ++i) {
free((uint8_t*)chain->entries[i].data);
chain->entries[i].data = NULL;
chain->entries[i].data_length = 0;
}
free(chain->entries);
chain->entries = NULL;
chain->entry_count = 0;
}
}
#ifdef __cplusplus
} // extern "C"
#endif // __cplusplus
#endif // ANDROID_HARDWARE_KEYMASTER_DEFS_H
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