1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** NetX Secure Component */
17 /** */
18 /** X.509 Digital Certificates */
19 /** */
20 /**************************************************************************/
21 /**************************************************************************/
22
23 #define NX_SECURE_SOURCE_CODE
24
25 #include "nx_secure_x509.h"
26
27 /**************************************************************************/
28 /* */
29 /* FUNCTION RELEASE */
30 /* */
31 /* _nx_secure_x509_local_certificate_find PORTABLE C */
32 /* 6.1.6 */
33 /* AUTHOR */
34 /* */
35 /* Timothy Stapko, Microsoft Corporation */
36 /* */
37 /* DESCRIPTION */
38 /* */
39 /* This function searches a given certificate store for a specific */
40 /* certificate. This is decided by searching the "local" certificate */
41 /* list in the given store for a certificate based on a specific */
42 /* unique ID in case multiple certificates share the same name. */
43 /* */
44 /* INPUT */
45 /* */
46 /* store Pointer to certificate store */
47 /* certificate Pointer to cert pointer */
48 /* cert_id Unique certificate identifier */
49 /* */
50 /* OUTPUT */
51 /* */
52 /* status Completion status */
53 /* */
54 /* CALLS */
55 /* */
56 /* None */
57 /* */
58 /* CALLED BY */
59 /* */
60 /* _nx_secure_tls_server_certificate_find */
61 /* Find server certificate */
62 /* */
63 /* RELEASE HISTORY */
64 /* */
65 /* DATE NAME DESCRIPTION */
66 /* */
67 /* 05-19-2020 Timothy Stapko Initial Version 6.0 */
68 /* 09-30-2020 Timothy Stapko Modified comment(s), */
69 /* resulting in version 6.1 */
70 /* 04-02-2021 Timothy Stapko Modified comment(s), */
71 /* removed dependency on TLS, */
72 /* resulting in version 6.1.6 */
73 /* */
74 /**************************************************************************/
_nx_secure_x509_local_certificate_find(NX_SECURE_X509_CERTIFICATE_STORE * store,NX_SECURE_X509_CERT ** certificate,UINT cert_id)75 UINT _nx_secure_x509_local_certificate_find(NX_SECURE_X509_CERTIFICATE_STORE *store,
76 NX_SECURE_X509_CERT **certificate, UINT cert_id)
77 {
78 NX_SECURE_X509_CERT *list_head;
79 NX_SECURE_X509_CERT *current_cert;
80
81 /* Get the first certificate in the local store. */
82 list_head = store -> nx_secure_x509_local_certificates;
83
84 if (list_head == NX_CRYPTO_NULL)
85 {
86 /* No certificates in this store! */
87 return(NX_SECURE_X509_CERTIFICATE_NOT_FOUND);
88 }
89
90 /* Walk the list until we find a certificate that has a matching ID. */
91 current_cert = list_head;
92
93 while (current_cert != NX_CRYPTO_NULL)
94 {
95 if (current_cert -> nx_secure_x509_cert_identifier == cert_id)
96 {
97 /* We found a match, return it. */
98 if (certificate != NX_CRYPTO_NULL)
99 {
100 /* If certificate is NULL, just return that one was found, but nothing to return. */
101 *certificate = current_cert;
102 }
103
104 /* We are OK to quit now, we found the certificate. */
105 return(NX_SECURE_X509_SUCCESS);
106 }
107
108 /* Advance our current certificate pointer. */
109 current_cert = current_cert -> nx_secure_x509_next_certificate;
110 }
111
112 /* No matching certificates in this store! */
113 return(NX_SECURE_X509_CERTIFICATE_NOT_FOUND);
114 }
115
116
