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Shawn Willden9d645a02014-06-12 13:48:46 -06001/*
2 * Copyright (C) 2014 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef ANDROID_HARDWARE_KEYMASTER_DEFS_H
18#define ANDROID_HARDWARE_KEYMASTER_DEFS_H
19
20#include <stdint.h>
21#include <stdlib.h>
22#include <string.h>
23
Shawn Willden7eaa15f2015-06-03 09:03:20 -060024#ifdef __cplusplus
Shawn Willdenc51d01e2015-03-18 18:59:52 -060025extern "C" {
26#endif // __cplusplus
Shawn Willden9d645a02014-06-12 13:48:46 -060027
Shawn Willden9d645a02014-06-12 13:48:46 -060028/**
29 * Authorization tags each have an associated type. This enumeration facilitates tagging each with
30 * a type, by using the high four bits (of an implied 32-bit unsigned enum value) to specify up to
31 * 16 data types. These values are ORed with tag IDs to generate the final tag ID values.
32 */
33typedef enum {
34 KM_INVALID = 0 << 28, /* Invalid type, used to designate a tag as uninitialized */
35 KM_ENUM = 1 << 28,
36 KM_ENUM_REP = 2 << 28, /* Repeatable enumeration value. */
Shawn Willdenfe6bcfa2015-06-24 20:59:14 +000037 KM_UINT = 3 << 28,
38 KM_UINT_REP = 4 << 28, /* Repeatable integer value */
39 KM_ULONG = 5 << 28,
Shawn Willden9d645a02014-06-12 13:48:46 -060040 KM_DATE = 6 << 28,
41 KM_BOOL = 7 << 28,
42 KM_BIGNUM = 8 << 28,
43 KM_BYTES = 9 << 28,
Shawn Willdenfe6bcfa2015-06-24 20:59:14 +000044 KM_ULONG_REP = 10 << 28, /* Repeatable long value */
Shawn Willden9d645a02014-06-12 13:48:46 -060045} keymaster_tag_type_t;
46
47typedef enum {
48 KM_TAG_INVALID = KM_INVALID | 0,
49
50 /*
51 * Tags that must be semantically enforced by hardware and software implementations.
52 */
53
54 /* Crypto parameters */
Shawn Willdencf30fe12015-12-21 16:29:10 -070055 KM_TAG_PURPOSE = KM_ENUM_REP | 1, /* keymaster_purpose_t. */
56 KM_TAG_ALGORITHM = KM_ENUM | 2, /* keymaster_algorithm_t. */
57 KM_TAG_KEY_SIZE = KM_UINT | 3, /* Key size in bits. */
58 KM_TAG_BLOCK_MODE = KM_ENUM_REP | 4, /* keymaster_block_mode_t. */
59 KM_TAG_DIGEST = KM_ENUM_REP | 5, /* keymaster_digest_t. */
60 KM_TAG_PADDING = KM_ENUM_REP | 6, /* keymaster_padding_t. */
61 KM_TAG_CALLER_NONCE = KM_BOOL | 7, /* Allow caller to specify nonce or IV. */
62 KM_TAG_MIN_MAC_LENGTH = KM_UINT | 8, /* Minimum length of MAC or AEAD authentication tag in
63 * bits. */
64 KM_TAG_KDF = KM_ENUM_REP | 9, /* keymaster_kdf_t (keymaster2) */
65 KM_TAG_EC_CURVE = KM_ENUM | 10, /* keymaster_ec_curve_t (keymaster2) */
Shawn Willden9d645a02014-06-12 13:48:46 -060066
Shawn Willden9d645a02014-06-12 13:48:46 -060067 /* Algorithm-specific. */
Shawn Willdenfe6bcfa2015-06-24 20:59:14 +000068 KM_TAG_RSA_PUBLIC_EXPONENT = KM_ULONG | 200,
Thai Duong40d59c82015-04-02 21:41:37 -070069 KM_TAG_ECIES_SINGLE_HASH_MODE = KM_BOOL | 201, /* Whether the ephemeral public key is fed into
Shawn Willdencf30fe12015-12-21 16:29:10 -070070 * the KDF */
71 KM_TAG_INCLUDE_UNIQUE_ID = KM_BOOL | 202, /* If true, attestation certificates for this key
72 * will contain an application-scoped and
73 * time-bounded device-unique ID. (keymaster2) */
Shawn Willden9d645a02014-06-12 13:48:46 -060074
Shawn Willdenfb769fc2015-05-11 09:24:48 -060075 /* Other hardware-enforced. */
76 KM_TAG_BLOB_USAGE_REQUIREMENTS = KM_ENUM | 301, /* keymaster_key_blob_usage_requirements_t */
77 KM_TAG_BOOTLOADER_ONLY = KM_BOOL | 302, /* Usable only by bootloader */
78
Shawn Willden9d645a02014-06-12 13:48:46 -060079 /*
80 * Tags that should be semantically enforced by hardware if possible and will otherwise be
81 * enforced by software (keystore).
82 */
83
84 /* Key validity period */
85 KM_TAG_ACTIVE_DATETIME = KM_DATE | 400, /* Start of validity */
86 KM_TAG_ORIGINATION_EXPIRE_DATETIME = KM_DATE | 401, /* Date when new "messages" should no
87 longer be created. */
88 KM_TAG_USAGE_EXPIRE_DATETIME = KM_DATE | 402, /* Date when existing "messages" should no
89 longer be trusted. */
Shawn Willdenfe6bcfa2015-06-24 20:59:14 +000090 KM_TAG_MIN_SECONDS_BETWEEN_OPS = KM_UINT | 403, /* Minimum elapsed time between
Shawn Willden9d645a02014-06-12 13:48:46 -060091 cryptographic operations with the key. */
Shawn Willdenfe6bcfa2015-06-24 20:59:14 +000092 KM_TAG_MAX_USES_PER_BOOT = KM_UINT | 404, /* Number of times the key can be used per
Shawn Willdendc0007b2015-01-23 01:01:21 -070093 boot. */
Shawn Willden9d645a02014-06-12 13:48:46 -060094
95 /* User authentication */
Shawn Willdenfe6bcfa2015-06-24 20:59:14 +000096 KM_TAG_ALL_USERS = KM_BOOL | 500, /* Reserved for future use -- ignore */
97 KM_TAG_USER_ID = KM_UINT | 501, /* Reserved for future use -- ignore */
98 KM_TAG_USER_SECURE_ID = KM_ULONG_REP | 502, /* Secure ID of authorized user or authenticator(s).
99 Disallowed if KM_TAG_ALL_USERS or
100 KM_TAG_NO_AUTH_REQUIRED is present. */
101 KM_TAG_NO_AUTH_REQUIRED = KM_BOOL | 503, /* If key is usable without authentication. */
102 KM_TAG_USER_AUTH_TYPE = KM_ENUM | 504, /* Bitmask of authenticator types allowed when
103 * KM_TAG_USER_SECURE_ID contains a secure user ID,
104 * rather than a secure authenticator ID. Defined in
105 * hw_authenticator_type_t in hw_auth_token.h. */
106 KM_TAG_AUTH_TIMEOUT = KM_UINT | 505, /* Required freshness of user authentication for
107 private/secret key operations, in seconds.
108 Public key operations require no authentication.
109 If absent, authentication is required for every
110 use. Authentication state is lost when the
111 device is powered off. */
Shawn Willden71ca0102016-01-26 07:00:27 -0700112 KM_TAG_ALLOW_WHILE_ON_BODY = KM_BOOL | 506, /* Allow key to be used after authentication timeout
113 * if device is still on-body (requires secure
114 * on-body sensor. */
Shawn Willden9d645a02014-06-12 13:48:46 -0600115
116 /* Application access control */
Shawn Willdencf30fe12015-12-21 16:29:10 -0700117 KM_TAG_ALL_APPLICATIONS = KM_BOOL | 600, /* Specified to indicate key is usable by all
118 * applications. */
119 KM_TAG_APPLICATION_ID = KM_BYTES | 601, /* Byte string identifying the authorized
120 * application. */
121 KM_TAG_EXPORTABLE = KM_BOOL | 602, /* If true, private/secret key can be exported, but
122 * only if all access control requirements for use are
123 * met. (keymaster2) */
Shawn Willden9d645a02014-06-12 13:48:46 -0600124
125 /*
126 * Semantically unenforceable tags, either because they have no specific meaning or because
127 * they're informational only.
128 */
Shawn Willden7fd11182016-02-03 07:39:40 -0700129 KM_TAG_APPLICATION_DATA = KM_BYTES | 700, /* Data provided by authorized application. */
130 KM_TAG_CREATION_DATETIME = KM_DATE | 701, /* Key creation time */
131 KM_TAG_ORIGIN = KM_ENUM | 702, /* keymaster_key_origin_t. */
132 KM_TAG_ROLLBACK_RESISTANT = KM_BOOL | 703, /* Whether key is rollback-resistant. */
133 KM_TAG_ROOT_OF_TRUST = KM_BYTES | 704, /* Root of trust ID. */
134 KM_TAG_OS_VERSION = KM_UINT | 705, /* Version of system (keymaster2) */
135 KM_TAG_OS_PATCHLEVEL = KM_UINT | 706, /* Patch level of system (keymaster2) */
136 KM_TAG_UNIQUE_ID = KM_BYTES | 707, /* Used to provide unique ID in attestation */
137 KM_TAG_ATTESTATION_CHALLENGE = KM_BYTES | 708, /* Used to provide challenge in attestation */
Shawn Willden9d645a02014-06-12 13:48:46 -0600138
Shawn Willden67ba9e82015-02-06 17:04:53 -0700139 /* Tags used only to provide data to or receive data from operations */
140 KM_TAG_ASSOCIATED_DATA = KM_BYTES | 1000, /* Used to provide associated data for AEAD modes. */
Shawn Willden41e91e92015-01-30 06:23:26 -0700141 KM_TAG_NONCE = KM_BYTES | 1001, /* Nonce or Initialization Vector */
Shawn Willdenda89dde2015-06-18 12:09:20 -0600142 KM_TAG_AUTH_TOKEN = KM_BYTES | 1002, /* Authentication token that proves secure user
Shawn Willdenc3ab05c2015-03-14 08:23:41 -0600143 authentication has been performed. Structure
144 defined in hw_auth_token_t in hw_auth_token.h. */
Shawn Willdencf30fe12015-12-21 16:29:10 -0700145 KM_TAG_MAC_LENGTH = KM_UINT | 1003, /* MAC or AEAD authentication tag length in
146 * bits. */
147
148 KM_TAG_RESET_SINCE_ID_ROTATION = KM_BOOL | 1004, /* Whether the device has beeen factory reset
149 since the last unique ID rotation. Used for
150 key attestation. */
Shawn Willden9d645a02014-06-12 13:48:46 -0600151} keymaster_tag_t;
152
153/**
154 * Algorithms that may be provided by keymaster implementations. Those that must be provided by all
Shawn Willdenfd4b4d52015-02-24 09:17:38 -0700155 * implementations are tagged as "required".
Shawn Willden9d645a02014-06-12 13:48:46 -0600156 */
157typedef enum {
158 /* Asymmetric algorithms. */
Shawn Willdene9797a72015-04-07 13:39:12 -0600159 KM_ALGORITHM_RSA = 1,
160 // KM_ALGORITHM_DSA = 2, -- Removed, do not re-use value 2.
161 KM_ALGORITHM_EC = 3,
162
163 /* Block ciphers algorithms */
164 KM_ALGORITHM_AES = 32,
165
Shawn Willden9d645a02014-06-12 13:48:46 -0600166 /* MAC algorithms */
Shawn Willdene9797a72015-04-07 13:39:12 -0600167 KM_ALGORITHM_HMAC = 128,
Shawn Willden9d645a02014-06-12 13:48:46 -0600168} keymaster_algorithm_t;
169
170/**
Shawn Willdenc7deeda2015-04-07 13:40:00 -0600171 * Symmetric block cipher modes provided by keymaster implementations.
Shawn Willden9d645a02014-06-12 13:48:46 -0600172 */
173typedef enum {
174 /* Unauthenticated modes, usable only for encryption/decryption and not generally recommended
175 * except for compatibility with existing other protocols. */
Shawn Willden4c19a3a2015-06-01 11:40:24 -0600176 KM_MODE_ECB = 1,
Shawn Willdenc7deeda2015-04-07 13:40:00 -0600177 KM_MODE_CBC = 2,
Shawn Willden4c19a3a2015-06-01 11:40:24 -0600178 KM_MODE_CTR = 3,
Shawn Willdenc7deeda2015-04-07 13:40:00 -0600179
Shawn Willden9d645a02014-06-12 13:48:46 -0600180 /* Authenticated modes, usable for encryption/decryption and signing/verification. Recommended
Shawn Willdenc7deeda2015-04-07 13:40:00 -0600181 * over unauthenticated modes for all purposes. */
Shawn Willden4c19a3a2015-06-01 11:40:24 -0600182 KM_MODE_GCM = 32,
Shawn Willden9d645a02014-06-12 13:48:46 -0600183} keymaster_block_mode_t;
184
185/**
186 * Padding modes that may be applied to plaintext for encryption operations. This list includes
187 * padding modes for both symmetric and asymmetric algorithms. Note that implementations should not
188 * provide all possible combinations of algorithm and padding, only the
189 * cryptographically-appropriate pairs.
190 */
191typedef enum {
Shawn Willden8412fdc2015-04-07 13:41:30 -0600192 KM_PAD_NONE = 1, /* deprecated */
193 KM_PAD_RSA_OAEP = 2,
194 KM_PAD_RSA_PSS = 3,
Shawn Willden9d645a02014-06-12 13:48:46 -0600195 KM_PAD_RSA_PKCS1_1_5_ENCRYPT = 4,
196 KM_PAD_RSA_PKCS1_1_5_SIGN = 5,
Shawn Willden8412fdc2015-04-07 13:41:30 -0600197 KM_PAD_PKCS7 = 64,
Shawn Willden9d645a02014-06-12 13:48:46 -0600198} keymaster_padding_t;
199
200/**
Shawn Willdenfe6c4f02015-04-07 14:02:28 -0600201 * Digests provided by keymaster implementations.
Shawn Willden9d645a02014-06-12 13:48:46 -0600202 */
203typedef enum {
Shawn Willdenfe6c4f02015-04-07 14:02:28 -0600204 KM_DIGEST_NONE = 0,
205 KM_DIGEST_MD5 = 1, /* Optional, may not be implemented in hardware, will be handled in software
206 * if needed. */
207 KM_DIGEST_SHA1 = 2,
208 KM_DIGEST_SHA_2_224 = 3,
209 KM_DIGEST_SHA_2_256 = 4,
210 KM_DIGEST_SHA_2_384 = 5,
211 KM_DIGEST_SHA_2_512 = 6,
Shawn Willden9d645a02014-06-12 13:48:46 -0600212} keymaster_digest_t;
213
Thai Duong40d59c82015-04-02 21:41:37 -0700214/*
215 * Key derivation functions, mostly used in ECIES.
216 */
217typedef enum {
Shawn Willdencf30fe12015-12-21 16:29:10 -0700218 /* Do not apply a key derivation function; use the raw agreed key */
219 KM_KDF_NONE = 0,
Thai Duong40d59c82015-04-02 21:41:37 -0700220 /* HKDF defined in RFC 5869 with SHA256 */
Shawn Willdencf30fe12015-12-21 16:29:10 -0700221 KM_KDF_RFC5869_SHA256 = 1,
Thai Duong40d59c82015-04-02 21:41:37 -0700222 /* KDF1 defined in ISO 18033-2 with SHA1 */
Shawn Willdencf30fe12015-12-21 16:29:10 -0700223 KM_KDF_ISO18033_2_KDF1_SHA1 = 2,
Thai Duong40d59c82015-04-02 21:41:37 -0700224 /* KDF1 defined in ISO 18033-2 with SHA256 */
Shawn Willdencf30fe12015-12-21 16:29:10 -0700225 KM_KDF_ISO18033_2_KDF1_SHA256 = 3,
Thai Duong40d59c82015-04-02 21:41:37 -0700226 /* KDF2 defined in ISO 18033-2 with SHA1 */
Shawn Willdencf30fe12015-12-21 16:29:10 -0700227 KM_KDF_ISO18033_2_KDF2_SHA1 = 4,
Thai Duong40d59c82015-04-02 21:41:37 -0700228 /* KDF2 defined in ISO 18033-2 with SHA256 */
Shawn Willdencf30fe12015-12-21 16:29:10 -0700229 KM_KDF_ISO18033_2_KDF2_SHA256 = 5,
Thai Duong40d59c82015-04-02 21:41:37 -0700230} keymaster_kdf_t;
231
232/**
233 * Supported EC curves, used in ECDSA/ECIES.
234 */
235typedef enum {
236 KM_EC_CURVE_P_224 = 0,
237 KM_EC_CURVE_P_256 = 1,
238 KM_EC_CURVE_P_384 = 2,
239 KM_EC_CURVE_P_521 = 3,
240} keymaster_ec_curve_t;
241
Shawn Willden9d645a02014-06-12 13:48:46 -0600242/**
Shawn Willden8d6cf252015-04-07 13:56:30 -0600243 * The origin of a key (or pair), i.e. where it was generated. Note that KM_TAG_ORIGIN can be found
244 * in either the hardware-enforced or software-enforced list for a key, indicating whether the key
245 * is hardware or software-based. Specifically, a key with KM_ORIGIN_GENERATED in the
246 * hardware-enforced list is guaranteed never to have existed outide the secure hardware.
Shawn Willden9d645a02014-06-12 13:48:46 -0600247 */
248typedef enum {
Shawn Willdencf30fe12015-12-21 16:29:10 -0700249 KM_ORIGIN_GENERATED = 0, /* Generated in keymaster. Should not exist outside the TEE. */
250 KM_ORIGIN_DERIVED = 1, /* Derived inside keymaster. Likely exists off-device. */
251 KM_ORIGIN_IMPORTED = 2, /* Imported into keymaster. Existed as cleartext in Android. */
Shawn Willdend359b042015-04-13 11:07:24 -0600252 KM_ORIGIN_UNKNOWN = 3, /* Keymaster did not record origin. This value can only be seen on
253 * keys in a keymaster0 implementation. The keymaster0 adapter uses
254 * this value to document the fact that it is unkown whether the key
255 * was generated inside or imported into keymaster. */
Shawn Willden9d645a02014-06-12 13:48:46 -0600256} keymaster_key_origin_t;
257
258/**
259 * Usability requirements of key blobs. This defines what system functionality must be available
260 * for the key to function. For example, key "blobs" which are actually handles referencing
261 * encrypted key material stored in the file system cannot be used until the file system is
262 * available, and should have BLOB_REQUIRES_FILE_SYSTEM. Other requirements entries will be added
Shawn Willdencf30fe12015-12-21 16:29:10 -0700263 * as needed for implementations.
Shawn Willden9d645a02014-06-12 13:48:46 -0600264 */
265typedef enum {
266 KM_BLOB_STANDALONE = 0,
267 KM_BLOB_REQUIRES_FILE_SYSTEM = 1,
268} keymaster_key_blob_usage_requirements_t;
269
270/**
Shawn Willdencf30fe12015-12-21 16:29:10 -0700271 * Possible purposes of a key (or pair).
Shawn Willden9d645a02014-06-12 13:48:46 -0600272 */
273typedef enum {
Shawn Willdencf30fe12015-12-21 16:29:10 -0700274 KM_PURPOSE_ENCRYPT = 0, /* Usable with RSA, EC and AES keys. */
275 KM_PURPOSE_DECRYPT = 1, /* Usable with RSA, EC and AES keys. */
276 KM_PURPOSE_SIGN = 2, /* Usable with RSA, EC and HMAC keys. */
277 KM_PURPOSE_VERIFY = 3, /* Usable with RSA, EC and HMAC keys. */
278 KM_PURPOSE_DERIVE_KEY = 4, /* Usable with EC keys. */
Shawn Willden9d645a02014-06-12 13:48:46 -0600279} keymaster_purpose_t;
280
281typedef struct {
282 const uint8_t* data;
283 size_t data_length;
284} keymaster_blob_t;
285
286typedef struct {
287 keymaster_tag_t tag;
288 union {
289 uint32_t enumerated; /* KM_ENUM and KM_ENUM_REP */
290 bool boolean; /* KM_BOOL */
291 uint32_t integer; /* KM_INT and KM_INT_REP */
292 uint64_t long_integer; /* KM_LONG */
293 uint64_t date_time; /* KM_DATE */
294 keymaster_blob_t blob; /* KM_BIGNUM and KM_BYTES*/
295 };
296} keymaster_key_param_t;
297
298typedef struct {
299 keymaster_key_param_t* params; /* may be NULL if length == 0 */
300 size_t length;
301} keymaster_key_param_set_t;
302
303/**
304 * Parameters that define a key's characteristics, including authorized modes of usage and access
305 * control restrictions. The parameters are divided into two categories, those that are enforced by
306 * secure hardware, and those that are not. For a software-only keymaster implementation the
307 * enforced array must NULL. Hardware implementations must enforce everything in the enforced
308 * array.
309 */
310typedef struct {
311 keymaster_key_param_set_t hw_enforced;
312 keymaster_key_param_set_t sw_enforced;
313} keymaster_key_characteristics_t;
314
315typedef struct {
316 const uint8_t* key_material;
317 size_t key_material_size;
318} keymaster_key_blob_t;
319
Shawn Willdencf30fe12015-12-21 16:29:10 -0700320typedef struct {
321 keymaster_blob_t* entries;
322 size_t entry_count;
323} keymaster_cert_chain_t;
324
Shawn Willden30802762016-03-09 19:42:47 -0700325typedef enum {
326 KM_VERIFIED_BOOT_VERIFIED = 0, /* Full chain of trust extending from the bootloader to
327 * verified partitions, including the bootloader, boot
328 * partition, and all verified partitions*/
329 KM_VERIFIED_BOOT_SELF_SIGNED = 1, /* The boot partition has been verified using the embedded
330 * certificate, and the signature is valid. The bootloader
331 * displays a warning and the fingerprint of the public
332 * key before allowing the boot process to continue.*/
333 KM_VERIFIED_BOOT_UNVERIFIED = 2, /* The device may be freely modified. Device integrity is left
334 * to the user to verify out-of-band. The bootloader
335 * displays a warning to the user before allowing the boot
336 * process to continue */
337 KM_VERIFIED_BOOT_FAILED = 3, /* The device failed verification. The bootloader displays a
338 * warning and stops the boot process, so no keymaster
339 * implementation should ever actually return this value,
340 * since it should not run. Included here only for
341 * completeness. */
342} keymaster_verified_boot_t;
343
Shawn Willdenaeb15d62016-03-19 08:56:43 -0600344typedef enum {
345 KM_SECURITY_LEVEL_SOFTWARE = 0,
346 KM_SECURITY_LEVEL_TRUSTED_ENVIRONMENT = 1,
347} keymaster_security_level_t;
348
Shawn Willden9d645a02014-06-12 13:48:46 -0600349/**
Shawn Willdencf30fe12015-12-21 16:29:10 -0700350 * Formats for key import and export.
Shawn Willden9d645a02014-06-12 13:48:46 -0600351 */
352typedef enum {
Shawn Willdenfb769fc2015-05-11 09:24:48 -0600353 KM_KEY_FORMAT_X509 = 0, /* for public key export */
354 KM_KEY_FORMAT_PKCS8 = 1, /* for asymmetric key pair import */
Shawn Willdencf30fe12015-12-21 16:29:10 -0700355 KM_KEY_FORMAT_RAW = 3, /* for symmetric key import and export*/
Shawn Willden9d645a02014-06-12 13:48:46 -0600356} keymaster_key_format_t;
357
358/**
359 * The keymaster operation API consists of begin, update, finish and abort. This is the type of the
360 * handle used to tie the sequence of calls together. A 64-bit value is used because it's important
361 * that handles not be predictable. Implementations must use strong random numbers for handle
362 * values.
363 */
364typedef uint64_t keymaster_operation_handle_t;
365
366typedef enum {
367 KM_ERROR_OK = 0,
368 KM_ERROR_ROOT_OF_TRUST_ALREADY_SET = -1,
369 KM_ERROR_UNSUPPORTED_PURPOSE = -2,
370 KM_ERROR_INCOMPATIBLE_PURPOSE = -3,
371 KM_ERROR_UNSUPPORTED_ALGORITHM = -4,
372 KM_ERROR_INCOMPATIBLE_ALGORITHM = -5,
373 KM_ERROR_UNSUPPORTED_KEY_SIZE = -6,
374 KM_ERROR_UNSUPPORTED_BLOCK_MODE = -7,
375 KM_ERROR_INCOMPATIBLE_BLOCK_MODE = -8,
Shawn Willden6b424be2015-01-26 13:04:28 -0700376 KM_ERROR_UNSUPPORTED_MAC_LENGTH = -9,
Shawn Willden9d645a02014-06-12 13:48:46 -0600377 KM_ERROR_UNSUPPORTED_PADDING_MODE = -10,
378 KM_ERROR_INCOMPATIBLE_PADDING_MODE = -11,
379 KM_ERROR_UNSUPPORTED_DIGEST = -12,
380 KM_ERROR_INCOMPATIBLE_DIGEST = -13,
381 KM_ERROR_INVALID_EXPIRATION_TIME = -14,
382 KM_ERROR_INVALID_USER_ID = -15,
383 KM_ERROR_INVALID_AUTHORIZATION_TIMEOUT = -16,
384 KM_ERROR_UNSUPPORTED_KEY_FORMAT = -17,
385 KM_ERROR_INCOMPATIBLE_KEY_FORMAT = -18,
386 KM_ERROR_UNSUPPORTED_KEY_ENCRYPTION_ALGORITHM = -19, /* For PKCS8 & PKCS12 */
387 KM_ERROR_UNSUPPORTED_KEY_VERIFICATION_ALGORITHM = -20, /* For PKCS8 & PKCS12 */
388 KM_ERROR_INVALID_INPUT_LENGTH = -21,
389 KM_ERROR_KEY_EXPORT_OPTIONS_INVALID = -22,
390 KM_ERROR_DELEGATION_NOT_ALLOWED = -23,
391 KM_ERROR_KEY_NOT_YET_VALID = -24,
392 KM_ERROR_KEY_EXPIRED = -25,
393 KM_ERROR_KEY_USER_NOT_AUTHENTICATED = -26,
394 KM_ERROR_OUTPUT_PARAMETER_NULL = -27,
395 KM_ERROR_INVALID_OPERATION_HANDLE = -28,
396 KM_ERROR_INSUFFICIENT_BUFFER_SPACE = -29,
397 KM_ERROR_VERIFICATION_FAILED = -30,
398 KM_ERROR_TOO_MANY_OPERATIONS = -31,
399 KM_ERROR_UNEXPECTED_NULL_POINTER = -32,
400 KM_ERROR_INVALID_KEY_BLOB = -33,
401 KM_ERROR_IMPORTED_KEY_NOT_ENCRYPTED = -34,
402 KM_ERROR_IMPORTED_KEY_DECRYPTION_FAILED = -35,
403 KM_ERROR_IMPORTED_KEY_NOT_SIGNED = -36,
404 KM_ERROR_IMPORTED_KEY_VERIFICATION_FAILED = -37,
405 KM_ERROR_INVALID_ARGUMENT = -38,
406 KM_ERROR_UNSUPPORTED_TAG = -39,
407 KM_ERROR_INVALID_TAG = -40,
408 KM_ERROR_MEMORY_ALLOCATION_FAILED = -41,
Shawn Willden9d645a02014-06-12 13:48:46 -0600409 KM_ERROR_IMPORT_PARAMETER_MISMATCH = -44,
410 KM_ERROR_SECURE_HW_ACCESS_DENIED = -45,
411 KM_ERROR_OPERATION_CANCELLED = -46,
412 KM_ERROR_CONCURRENT_ACCESS_CONFLICT = -47,
413 KM_ERROR_SECURE_HW_BUSY = -48,
414 KM_ERROR_SECURE_HW_COMMUNICATION_FAILED = -49,
415 KM_ERROR_UNSUPPORTED_EC_FIELD = -50,
Shawn Willdened941112015-03-11 21:53:59 -0600416 KM_ERROR_MISSING_NONCE = -51,
417 KM_ERROR_INVALID_NONCE = -52,
Shawn Willden4144c642015-06-01 11:40:34 -0600418 KM_ERROR_MISSING_MAC_LENGTH = -53,
Shawn Willden396d6cb2015-06-18 12:16:17 -0600419 KM_ERROR_KEY_RATE_LIMIT_EXCEEDED = -54,
Shawn Willden4bdd7cb2015-04-28 00:00:27 -0600420 KM_ERROR_CALLER_NONCE_PROHIBITED = -55,
Shawn Willden396d6cb2015-06-18 12:16:17 -0600421 KM_ERROR_KEY_MAX_OPS_EXCEEDED = -56,
Shawn Willdena3f0ab52015-07-08 06:04:52 -0600422 KM_ERROR_INVALID_MAC_LENGTH = -57,
423 KM_ERROR_MISSING_MIN_MAC_LENGTH = -58,
424 KM_ERROR_UNSUPPORTED_MIN_MAC_LENGTH = -59,
Thai Duong40d59c82015-04-02 21:41:37 -0700425 KM_ERROR_UNSUPPORTED_KDF = -60,
426 KM_ERROR_UNSUPPORTED_EC_CURVE = -61,
Shawn Willdencf30fe12015-12-21 16:29:10 -0700427 KM_ERROR_KEY_REQUIRES_UPGRADE = -62,
Shawn Willden7fd11182016-02-03 07:39:40 -0700428 KM_ERROR_ATTESTATION_CHALLENGE_MISSING = -63,
Shawn Willden30802762016-03-09 19:42:47 -0700429 KM_ERROR_KEYMASTER_NOT_CONFIGURED = -64,
Shawn Willdened941112015-03-11 21:53:59 -0600430
Shawn Willden9d645a02014-06-12 13:48:46 -0600431 KM_ERROR_UNIMPLEMENTED = -100,
432 KM_ERROR_VERSION_MISMATCH = -101,
433
Shawn Willden9d645a02014-06-12 13:48:46 -0600434 KM_ERROR_UNKNOWN_ERROR = -1000,
435} keymaster_error_t;
436
Shawn Willden9d645a02014-06-12 13:48:46 -0600437/* Convenience functions for manipulating keymaster tag types */
438
439static inline keymaster_tag_type_t keymaster_tag_get_type(keymaster_tag_t tag) {
440 return (keymaster_tag_type_t)(tag & (0xF << 28));
441}
442
443static inline uint32_t keymaster_tag_mask_type(keymaster_tag_t tag) {
444 return tag & 0x0FFFFFFF;
445}
446
447static inline bool keymaster_tag_type_repeatable(keymaster_tag_type_t type) {
448 switch (type) {
Shawn Willdenfe6bcfa2015-06-24 20:59:14 +0000449 case KM_UINT_REP:
Shawn Willden9d645a02014-06-12 13:48:46 -0600450 case KM_ENUM_REP:
451 return true;
452 default:
453 return false;
454 }
455}
456
457static inline bool keymaster_tag_repeatable(keymaster_tag_t tag) {
458 return keymaster_tag_type_repeatable(keymaster_tag_get_type(tag));
459}
460
461/* Convenience functions for manipulating keymaster_key_param_t structs */
462
463inline keymaster_key_param_t keymaster_param_enum(keymaster_tag_t tag, uint32_t value) {
464 // assert(keymaster_tag_get_type(tag) == KM_ENUM || keymaster_tag_get_type(tag) == KM_ENUM_REP);
465 keymaster_key_param_t param;
466 memset(&param, 0, sizeof(param));
467 param.tag = tag;
468 param.enumerated = value;
469 return param;
470}
471
472inline keymaster_key_param_t keymaster_param_int(keymaster_tag_t tag, uint32_t value) {
473 // assert(keymaster_tag_get_type(tag) == KM_INT || keymaster_tag_get_type(tag) == KM_INT_REP);
474 keymaster_key_param_t param;
475 memset(&param, 0, sizeof(param));
476 param.tag = tag;
477 param.integer = value;
478 return param;
479}
480
481inline keymaster_key_param_t keymaster_param_long(keymaster_tag_t tag, uint64_t value) {
482 // assert(keymaster_tag_get_type(tag) == KM_LONG);
483 keymaster_key_param_t param;
484 memset(&param, 0, sizeof(param));
485 param.tag = tag;
486 param.long_integer = value;
487 return param;
488}
489
490inline keymaster_key_param_t keymaster_param_blob(keymaster_tag_t tag, const uint8_t* bytes,
491 size_t bytes_len) {
492 // assert(keymaster_tag_get_type(tag) == KM_BYTES || keymaster_tag_get_type(tag) == KM_BIGNUM);
493 keymaster_key_param_t param;
494 memset(&param, 0, sizeof(param));
495 param.tag = tag;
496 param.blob.data = (uint8_t*)bytes;
497 param.blob.data_length = bytes_len;
498 return param;
499}
500
501inline keymaster_key_param_t keymaster_param_bool(keymaster_tag_t tag) {
502 // assert(keymaster_tag_get_type(tag) == KM_BOOL);
503 keymaster_key_param_t param;
504 memset(&param, 0, sizeof(param));
505 param.tag = tag;
506 param.boolean = true;
507 return param;
508}
509
510inline keymaster_key_param_t keymaster_param_date(keymaster_tag_t tag, uint64_t value) {
511 // assert(keymaster_tag_get_type(tag) == KM_DATE);
512 keymaster_key_param_t param;
513 memset(&param, 0, sizeof(param));
514 param.tag = tag;
515 param.date_time = value;
516 return param;
517}
518
Shawn Willden67411d62015-03-04 10:00:38 -0700519#define KEYMASTER_SIMPLE_COMPARE(a, b) (a < b) ? -1 : ((a > b) ? 1 : 0)
520inline int keymaster_param_compare(const keymaster_key_param_t* a, const keymaster_key_param_t* b) {
Tucker Sylvestro28a872e2016-10-05 14:39:39 -0400521 int retval = KEYMASTER_SIMPLE_COMPARE((uint32_t)a->tag, (uint32_t)b->tag);
Shawn Willden67411d62015-03-04 10:00:38 -0700522 if (retval != 0)
523 return retval;
524
525 switch (keymaster_tag_get_type(a->tag)) {
526 case KM_INVALID:
527 case KM_BOOL:
528 return 0;
529 case KM_ENUM:
530 case KM_ENUM_REP:
531 return KEYMASTER_SIMPLE_COMPARE(a->enumerated, b->enumerated);
Shawn Willdenfe6bcfa2015-06-24 20:59:14 +0000532 case KM_UINT:
533 case KM_UINT_REP:
Shawn Willden67411d62015-03-04 10:00:38 -0700534 return KEYMASTER_SIMPLE_COMPARE(a->integer, b->integer);
Shawn Willdenfe6bcfa2015-06-24 20:59:14 +0000535 case KM_ULONG:
536 case KM_ULONG_REP:
Shawn Willden67411d62015-03-04 10:00:38 -0700537 return KEYMASTER_SIMPLE_COMPARE(a->long_integer, b->long_integer);
538 case KM_DATE:
539 return KEYMASTER_SIMPLE_COMPARE(a->date_time, b->date_time);
540 case KM_BIGNUM:
541 case KM_BYTES:
542 // Handle the empty cases.
543 if (a->blob.data_length != 0 && b->blob.data_length == 0)
544 return -1;
545 if (a->blob.data_length == 0 && b->blob.data_length == 0)
546 return 0;
547 if (a->blob.data_length == 0 && b->blob.data_length > 0)
548 return 1;
549
550 retval = memcmp(a->blob.data, b->blob.data, a->blob.data_length < b->blob.data_length
551 ? a->blob.data_length
552 : b->blob.data_length);
553 if (retval != 0)
554 return retval;
555 else if (a->blob.data_length != b->blob.data_length) {
556 // Equal up to the common length; longer one is larger.
557 if (a->blob.data_length < b->blob.data_length)
558 return -1;
559 if (a->blob.data_length > b->blob.data_length)
560 return 1;
561 };
562 }
563
564 return 0;
565}
566#undef KEYMASTER_SIMPLE_COMPARE
567
Shawn Willden9d645a02014-06-12 13:48:46 -0600568inline void keymaster_free_param_values(keymaster_key_param_t* param, size_t param_count) {
Chad Brubakera3c0ae12015-08-12 12:46:44 -0700569 while (param_count > 0) {
570 param_count--;
Shawn Willden9d645a02014-06-12 13:48:46 -0600571 switch (keymaster_tag_get_type(param->tag)) {
572 case KM_BIGNUM:
573 case KM_BYTES:
574 free((void*)param->blob.data);
575 param->blob.data = NULL;
576 break;
577 default:
578 // NOP
579 break;
580 }
581 ++param;
582 }
583}
584
585inline void keymaster_free_param_set(keymaster_key_param_set_t* set) {
586 if (set) {
587 keymaster_free_param_values(set->params, set->length);
588 free(set->params);
589 set->params = NULL;
Shawn Willdene366efd2016-03-20 09:07:50 -0600590 set->length = 0;
Shawn Willden9d645a02014-06-12 13:48:46 -0600591 }
592}
593
594inline void keymaster_free_characteristics(keymaster_key_characteristics_t* characteristics) {
595 if (characteristics) {
596 keymaster_free_param_set(&characteristics->hw_enforced);
597 keymaster_free_param_set(&characteristics->sw_enforced);
598 }
599}
600
Shawn Willdencf30fe12015-12-21 16:29:10 -0700601inline void keymaster_free_cert_chain(keymaster_cert_chain_t* chain) {
602 if (chain) {
603 for (size_t i = 0; i < chain->entry_count; ++i) {
604 free((uint8_t*)chain->entries[i].data);
605 chain->entries[i].data = NULL;
606 chain->entries[i].data_length = 0;
607 }
608 free(chain->entries);
609 chain->entries = NULL;
610 chain->entry_count = 0;
611 }
612}
613
Shawn Willden7eaa15f2015-06-03 09:03:20 -0600614#ifdef __cplusplus
Shawn Willdenc51d01e2015-03-18 18:59:52 -0600615} // extern "C"
616#endif // __cplusplus
Shawn Willden9d645a02014-06-12 13:48:46 -0600617
618#endif // ANDROID_HARDWARE_KEYMASTER_DEFS_H