| /* |
| * 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 */ |
| KM_TAG_ATTESTATION_APPLICATION_ID = KM_BYTES | 709, /* Used to identify the set of possible |
| * applications of which one has initiated |
| * a key attestation */ |
| KM_TAG_ATTESTATION_ID_BRAND = KM_BYTES | 710, /* Used to provide the device's brand name to be |
| included in attestation */ |
| KM_TAG_ATTESTATION_ID_DEVICE = KM_BYTES | 711, /* Used to provide the device's device name to be |
| included in attestation */ |
| KM_TAG_ATTESTATION_ID_PRODUCT = KM_BYTES | 712, /* Used to provide the device's product name to |
| be included in attestation */ |
| KM_TAG_ATTESTATION_ID_SERIAL = KM_BYTES | 713, /* Used to provide the device's serial number to |
| be included in attestation */ |
| KM_TAG_ATTESTATION_ID_IMEI = KM_BYTES | 714, /* Used to provide the device's IMEI to be |
| included in attestation */ |
| KM_TAG_ATTESTATION_ID_MEID = KM_BYTES | 715, /* Used to provide the device's MEID to be |
| included in attestation */ |
| KM_TAG_ATTESTATION_ID_MANUFACTURER = KM_BYTES | 716, /* Used to provide the device's |
| manufacturer name to be included in |
| attestation */ |
| KM_TAG_ATTESTATION_ID_MODEL = KM_BYTES | 717, /* Used to provide the device's model name to be |
| included 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_ATTESTATION_APPLICATION_ID_MISSING = -65, |
| KM_ERROR_CANNOT_ATTEST_IDS = -66, |
| |
| 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(¶m, 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(¶m, 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(¶m, 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(¶m, 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(¶m, 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(¶m, 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 |
