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smp_api.h
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1 /*************************************************************************************************/
2 /*!
3  * \file
4  *
5  * \brief SMP subsystem API.
6  *
7  * Copyright (c) 2010-2019 Arm Ltd. All Rights Reserved.
8  *
9  * Copyright (c) 2019-2020 Packetcraft, Inc.
10  *
11  * Licensed under the Apache License, Version 2.0 (the "License");
12  * you may not use this file except in compliance with the License.
13  * You may obtain a copy of the License at
14  *
15  * http://www.apache.org/licenses/LICENSE-2.0
16  *
17  * Unless required by applicable law or agreed to in writing, software
18  * distributed under the License is distributed on an "AS IS" BASIS,
19  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
20  * See the License for the specific language governing permissions and
21  * limitations under the License.
22  */
23 /*************************************************************************************************/
24 #ifndef SMP_API_H
25 #define SMP_API_H
26 
27 #include "wsf_os.h"
28 #include "smp_defs.h"
29 #include "dm_api.h"
30 
31 #ifdef __cplusplus
32 extern "C" {
33 #endif
34 
35 /*! \addtogroup STACK_SMP_API
36  * \{ */
37 
38 /**************************************************************************************************
39  Macros
40 **************************************************************************************************/
41 
42 /** \name SMP Events
43  * Events recognized and handled by the SMP state machine.
44  */
45 /**@{*/
46 /*! \brief Event handler messages for SMP state machines */
47 enum
48 {
49  SMP_MSG_API_PAIR_REQ = 1, /*!< \brief API pairing request */
50  SMP_MSG_API_PAIR_RSP, /*!< \brief API pairing response */
51  SMP_MSG_API_CANCEL_REQ, /*!< \brief API cancel request */
52  SMP_MSG_API_AUTH_RSP, /*!< \brief API pin response */
53  SMP_MSG_API_SECURITY_REQ, /*!< \brief API security request */
54  SMP_MSG_CMD_PKT, /*!< \brief SMP command packet received */
55  SMP_MSG_CMD_PAIRING_FAILED, /*!< \brief SMP pairing failed packet received */
56  SMP_MSG_DM_ENCRYPT_CMPL, /*!< \brief Link encrypted */
57  SMP_MSG_DM_ENCRYPT_FAILED, /*!< \brief Link encryption failed */
58  SMP_MSG_DM_CONN_CLOSE, /*!< \brief Connection closed */
59  SMP_MSG_WSF_AES_CMPL, /*!< \brief AES calculation complete */
60  SMP_MSG_INT_SEND_NEXT_KEY, /*!< \brief Send next key to be distributed */
61  SMP_MSG_INT_MAX_ATTEMPTS, /*!< \brief Maximum pairing attempts reached */
62  SMP_MSG_INT_PAIRING_CMPL, /*!< \brief Pairing complete */
63  SMP_MSG_INT_RSP_TIMEOUT, /*!< \brief Pairing protocol response timeout */
64  SMP_MSG_INT_WI_TIMEOUT, /*!< \brief Pairing protocol wait interval timeout */
65  SMP_MSG_INT_LESC, /*!< \brief Pair with Secure Connections */
66  SMP_MSG_INT_LEGACY, /*!< \brief Pair with Legacy Security */
67  SMP_MSG_INT_JW_NC, /*!< \brief LESC Just-Works/Numeric Comparison pairing */
68  SMP_MSG_INT_PASSKEY, /*!< \brief LESC Passkey pairing */
69  SMP_MSG_INT_OOB, /*!< \brief LESC Out-of-Band Pairing */
70  SMP_MSG_API_USER_CONFIRM, /*!< \brief User confirms valid numeric comparison */
71  SMP_MSG_API_USER_KEYPRESS, /*!< \brief User keypress in passkey pairing */
72  SMP_MSG_API_KEYPRESS_CMPL, /*!< \brief User keypress complete in passkey pairing */
73  SMP_MSG_WSF_ECC_CMPL, /*!< \brief WSF ECC operation complete */
74  SMP_MSG_INT_PK_NEXT, /*!< \brief Continue to next passkey bit */
75  SMP_MSG_INT_PK_CMPL, /*!< \brief Passkey operation complete */
76  SMP_MSG_WSF_CMAC_CMPL, /*!< \brief WSF CMAC operation complete */
77  SMP_MSG_DH_CHECK_FAILURE, /*!< \brief DHKey check failure */
78  SMP_MSG_EARLY_CNF, /*!< \brief An early Confirm from the initiator in passkey pairing */
79  SMP_MSG_INT_CLEANUP, /*!< \brief Cleanup control information and return to IDLE state */
80  SMP_NUM_MSGS /*!< \brief Number of SMP message types. */
81 };
82 /**@}*/
83 
84 /**@{*/
85 /*! \brief Additional SMP messages */
86 enum
87 {
88  SMP_DB_SERVICE_IND = SMP_NUM_MSGS /*!< \brief SMP DB Service timer indication */
89 };
90 /**@}*/
91 
92 /**************************************************************************************************
93  Data Types
94 **************************************************************************************************/
95 
96 /*! \brief Configurable parameters */
97 typedef struct
98 {
99  uint32_t attemptTimeout; /*!< \brief 'Repeated attempts' timeout in msec */
100  uint8_t ioCap; /*!< \brief I/O Capability */
101  uint8_t minKeyLen; /*!< \brief Minimum encryption key length */
102  uint8_t maxKeyLen; /*!< \brief Maximum encryption key length */
103  uint8_t maxAttempts; /*!< \brief Attempts to trigger 'repeated attempts' timeout */
104  uint8_t auth; /*!< \brief Device authentication requirements */
105  uint32_t maxAttemptTimeout; /*!< \brief Maximum 'Repeated attempts' timeout in msec */
106  uint32_t attemptDecTimeout; /*!< \brief Time msec before attemptExp decreases */
107  uint16_t attemptExp; /*!< \brief Exponent to raise attemptTimeout on maxAttempts */
108 } smpCfg_t;
109 
110 /*! \brief Data type for SMP_MSG_API_PAIR_REQ and SMP_MSG_API_PAIR_RSP */
111 typedef struct
112 {
113  wsfMsgHdr_t hdr; /*!< \brief Message header */
114  uint8_t oob; /*!< \brief Out-of-band data present flag */
115  uint8_t auth; /*!< \brief authentication flags */
116  uint8_t iKeyDist; /*!< \brief Initiator key distribution flags */
117  uint8_t rKeyDist; /*!< \brief Responder key distribution flags */
118 } smpDmPair_t;
119 
120 /*! \brief Data type for SMP_MSG_API_AUTH_RSP */
121 typedef struct
122 {
123  wsfMsgHdr_t hdr; /*!< \brief Message header */
124  uint8_t authData[SMP_OOB_LEN]; /*!< \brief Authentication data to display */
125  uint8_t authDataLen; /*!< \brief Length of authentication data */
127 
128 /*! \brief Data type for SMP_MSG_API_USER_KEYPRESS */
129 typedef struct
130 {
131  wsfMsgHdr_t hdr; /*!< \brief Message header */
132  uint8_t keypress; /*!< \brief Keypress */
134 
135 /*! \brief Data type for SMP_MSG_API_SECURITY_REQ */
136 typedef struct
137 {
138  wsfMsgHdr_t hdr; /*!< \brief Message header */
139  uint8_t auth; /*!< \brief Authentication flags */
141 
142 /*! \brief Union SMP DM message data types */
143 typedef union
144 {
145  wsfMsgHdr_t hdr; /*!< \brief Message header */
146  smpDmPair_t pair; /*!< \brief Pairing request/response message */
147  smpDmAuthRsp_t authRsp; /*!< \brief Authentication message */
148  smpDmSecurityReq_t securityReq; /*!< \brief Security Request message */
149  smpDmKeypress_t keypress; /*!< \brief Keypress message */
150 } smpDmMsg_t;
151 
152 /*! \} */ /* STACK_SMP_API */
153 
154 /**************************************************************************************************
155  Global Variables;
156 **************************************************************************************************/
157 
158 /*! \addtogroup STACK_INIT
159  * \{ */
160 
161 /** \name SMP Configuration Structure
162  * Pointer to structure containing initialization details of the SMP Subsystem. To be configured
163  * by Application.
164  */
165 /**@{*/
166 /*! \brief Configuration pointer */
167 extern smpCfg_t *pSmpCfg;
168 /**@}*/
169 
170 /*! \} */ /* STACK_INIT */
171 
172 /**************************************************************************************************
173  Function Declarations
174 **************************************************************************************************/
175 
176 /*! \addtogroup STACK_SMP_API
177  * \{ */
178 
179 /** \name SMP Initialization Functions
180  * Legacy and Secure Connections initialization for Initiator and Responder roles.
181  */
182 /**@{*/
183 
184 /*************************************************************************************************/
185 /*!
186  * \brief Initialize SMP initiator role.
187  *
188  * \return None.
189  */
190 /*************************************************************************************************/
191 void SmpiInit(void);
192 
193 /*************************************************************************************************/
194 /*!
195  * \brief Initialize SMP responder role.
196  *
197  * \return None.
198  */
199 /*************************************************************************************************/
200 void SmprInit(void);
201 
202 /*************************************************************************************************/
203 /*!
204  * \brief Initialize SMP initiator role utilizing BTLE Secure Connections.
205  *
206  * \return None.
207  */
208 /*************************************************************************************************/
209 void SmpiScInit(void);
210 
211 /*************************************************************************************************/
212 /*!
213  * \brief Initialize SMP responder role utilizing BTLE Secure Connections.
214  *
215  * \return None.
216  */
217 /*************************************************************************************************/
218 void SmprScInit(void);
219 
220 /*************************************************************************************************/
221 /*!
222  * \brief Use this SMP init function when SMP is not supported.
223  *
224  * \return None.
225  */
226 /*************************************************************************************************/
227 void SmpNonInit(void);
228 
229 /**@}*/
230 
231 /** \name SMP DM Interface Functions
232  * Functions that allow the DM to send messages to SMP.
233  */
234 /**@{*/
235 
236 /*************************************************************************************************/
237 /*!
238  * \brief This function is called by DM to send a message to SMP.
239  *
240  * \param pMsg Pointer to message structure.
241  *
242  * \return None.
243  */
244 /*************************************************************************************************/
245 void SmpDmMsgSend(smpDmMsg_t *pMsg);
246 
247 /*************************************************************************************************/
248 /*!
249  * \brief This function is called by DM to notify SMP of encrypted link status.
250  *
251  * \param pMsg Pointer to HCI message structure.
252  *
253  * \return None.
254  */
255 /*************************************************************************************************/
256 void SmpDmEncryptInd(wsfMsgHdr_t *pMsg);
257 
258 /*************************************************************************************************/
259 /*!
260  * \brief Check if LE Secure Connections is enabled on the connection.
261  *
262  * \param connId Connection identifier.
263  *
264  * \return TRUE is Secure Connections is enabled, else FALSE
265  */
266 /*************************************************************************************************/
267 bool_t SmpDmLescEnabled(dmConnId_t connId);
268 
269 /*************************************************************************************************/
270 /*!
271  * \brief Return the STK for the given connection.
272  *
273  * \param connId Connection identifier.
274  * \param pSecLevel Returns the security level of pairing when STK was created.
275  *
276  * \return Pointer to STK or NULL if not available.
277  */
278 /*************************************************************************************************/
279 uint8_t *SmpDmGetStk(dmConnId_t connId, uint8_t *pSecLevel);
280 
281 /*************************************************************************************************/
282 /*!
283  * \brief Format a cancel message with consideration for the attempts counter
284  *
285  * \param connId Connection Id.
286  * \param pHdr Pointer to header of message to fill.
287  * \param status Status to include.
288  *
289  * \return none.
290  */
291 /*************************************************************************************************/
292 void SmpScGetCancelMsgWithReattempt(dmConnId_t connId, wsfMsgHdr_t *pHdr, uint8_t status);
293 
294 /*************************************************************************************************/
295 /*!
296  * \brief Initialize the SMP Database.
297  *
298  * \return None.
299  */
300 /*************************************************************************************************/
301 void SmpDbInit(void);
302 
303 /*************************************************************************************************/
304 /*!
305  * \brief Called to force the DhKey to zero for qualification test purposes.
306  *
307  * \param enable TRUE - Force DhKey to zero. FALSE - Use calculated key
308  *
309  * \return None.
310  */
311 /*************************************************************************************************/
312 void SmpScEnableZeroDhKey(bool_t enable);
313 
314 /**@}*/
315 
316 /*! \} */ /* STACK_SMP_API */
317 
318 #ifdef __cplusplus
319 };
320 #endif
321 
322 #endif /* SMP_API_H */
void SmpDmMsgSend(smpDmMsg_t *pMsg)
This function is called by DM to send a message to SMP.
uint8_t * SmpDmGetStk(dmConnId_t connId, uint8_t *pSecLevel)
Return the STK for the given connection.
smpDmKeypress_t keypress
Keypress message.
Definition: smp_api.h:149
Maximum pairing attempts reached.
Definition: smp_api.h:61
Pair with Legacy Security.
Definition: smp_api.h:66
uint8_t dmConnId_t
Connection identifier.
Definition: dm_api.h:588
smpDmSecurityReq_t securityReq
Security Request message.
Definition: smp_api.h:148
Pairing protocol wait interval timeout.
Definition: smp_api.h:64
Send next key to be distributed.
Definition: smp_api.h:60
uint8_t keypress
Keypress.
Definition: smp_api.h:132
Continue to next passkey bit.
Definition: smp_api.h:74
An early Confirm from the initiator in passkey pairing.
Definition: smp_api.h:78
SMP pairing failed packet received.
Definition: smp_api.h:55
User confirms valid numeric comparison.
Definition: smp_api.h:70
wsfMsgHdr_t hdr
Message header.
Definition: smp_api.h:131
Data type for SMP_MSG_API_AUTH_RSP.
Definition: smp_api.h:121
Number of SMP message types.
Definition: smp_api.h:80
uint8_t minKeyLen
Minimum encryption key length.
Definition: smp_api.h:101
void SmprScInit(void)
Initialize SMP responder role utilizing BTLE Secure Connections.
Pairing protocol response timeout.
Definition: smp_api.h:63
smpDmPair_t pair
Pairing request/response message.
Definition: smp_api.h:146
wsfMsgHdr_t hdr
Message header.
Definition: smp_api.h:138
Pairing complete.
Definition: smp_api.h:62
DHKey check failure.
Definition: smp_api.h:77
uint32_t maxAttemptTimeout
Maximum &#39;Repeated attempts&#39; timeout in msec.
Definition: smp_api.h:105
void SmpScEnableZeroDhKey(bool_t enable)
Called to force the DhKey to zero for qualification test purposes.
AES calculation complete.
Definition: smp_api.h:59
Link encryption failed.
Definition: smp_api.h:57
wsfMsgHdr_t hdr
Message header.
Definition: smp_api.h:145
WSF ECC operation complete.
Definition: smp_api.h:73
bool_t SmpDmLescEnabled(dmConnId_t connId)
Check if LE Secure Connections is enabled on the connection.
API security request.
Definition: smp_api.h:53
void SmpiScInit(void)
Initialize SMP initiator role utilizing BTLE Secure Connections.
Data type for SMP_MSG_API_USER_KEYPRESS.
Definition: smp_api.h:129
User keypress in passkey pairing.
Definition: smp_api.h:71
WSF CMAC operation complete.
Definition: smp_api.h:76
uint8_t ioCap
I/O Capability.
Definition: smp_api.h:100
wsfMsgHdr_t hdr
Message header.
Definition: smp_api.h:113
Cleanup control information and return to IDLE state.
Definition: smp_api.h:79
Data type for SMP_MSG_API_PAIR_REQ and SMP_MSG_API_PAIR_RSP.
Definition: smp_api.h:111
uint8_t maxAttempts
Attempts to trigger &#39;repeated attempts&#39; timeout.
Definition: smp_api.h:103
uint8_t auth
authentication flags
Definition: smp_api.h:115
uint16_t attemptExp
Exponent to raise attemptTimeout on maxAttempts.
Definition: smp_api.h:107
smpDmAuthRsp_t authRsp
Authentication message.
Definition: smp_api.h:147
Data type for SMP_MSG_API_SECURITY_REQ.
Definition: smp_api.h:136
Pair with Secure Connections.
Definition: smp_api.h:65
uint32_t attemptDecTimeout
Time msec before attemptExp decreases.
Definition: smp_api.h:106
uint8_t maxKeyLen
Maximum encryption key length.
Definition: smp_api.h:102
uint32_t attemptTimeout
&#39;Repeated attempts&#39; timeout in msec
Definition: smp_api.h:99
API pin response.
Definition: smp_api.h:52
SMP DB Service timer indication.
Definition: smp_api.h:88
Security manager constants and definitions from the Bluetooth specification.
SMP command packet received.
Definition: smp_api.h:54
API pairing request.
Definition: smp_api.h:49
void SmpNonInit(void)
Use this SMP init function when SMP is not supported.
void SmpDmEncryptInd(wsfMsgHdr_t *pMsg)
This function is called by DM to notify SMP of encrypted link status.
uint8_t oob
Out-of-band data present flag.
Definition: smp_api.h:114
Device Manager subsystem API.
wsfMsgHdr_t hdr
Message header.
Definition: smp_api.h:123
API cancel request.
Definition: smp_api.h:51
Passkey operation complete.
Definition: smp_api.h:75
uint8_t auth
Authentication flags.
Definition: smp_api.h:139
User keypress complete in passkey pairing.
Definition: smp_api.h:72
LESC Just-Works/Numeric Comparison pairing.
Definition: smp_api.h:67
void SmprInit(void)
Initialize SMP responder role.
void SmpDbInit(void)
Initialize the SMP Database.
Connection closed.
Definition: smp_api.h:58
#define SMP_OOB_LEN
OOB Data length in bytes.
Definition: smp_defs.h:52
uint8_t rKeyDist
Responder key distribution flags.
Definition: smp_api.h:117
Configurable parameters.
Definition: smp_api.h:97
Union SMP DM message data types.
Definition: smp_api.h:143
void SmpScGetCancelMsgWithReattempt(dmConnId_t connId, wsfMsgHdr_t *pHdr, uint8_t status)
Format a cancel message with consideration for the attempts counter.
uint8_t authDataLen
Length of authentication data.
Definition: smp_api.h:125
Software foundation OS API.
void SmpiInit(void)
Initialize SMP initiator role.
Common message structure passed to event handler.
Definition: wsf_os.h:106
smpCfg_t * pSmpCfg
Configuration pointer.
Link encrypted.
Definition: smp_api.h:56
API pairing response.
Definition: smp_api.h:50
LESC Passkey pairing.
Definition: smp_api.h:68
LESC Out-of-Band Pairing.
Definition: smp_api.h:69
uint8_t iKeyDist
Initiator key distribution flags.
Definition: smp_api.h:116
uint8_t auth
Device authentication requirements.
Definition: smp_api.h:104
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