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1 #ifndef HEADER_CURL_X509ASN1_H
2 #define HEADER_CURL_X509ASN1_H
3 
4 /***************************************************************************
5  *                                  _   _ ____  _
6  *  Project                     ___| | | |  _ \| |
7  *                             / __| | | | |_) | |
8  *                            | (__| |_| |  _ <| |___
9  *                             \___|\___/|_| \_\_____|
10  *
11  * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
12  *
13  * This software is licensed as described in the file COPYING, which
14  * you should have received as part of this distribution. The terms
15  * are also available at https://curl.haxx.se/docs/copyright.html.
16  *
17  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
18  * copies of the Software, and permit persons to whom the Software is
19  * furnished to do so, under the terms of the COPYING file.
20  *
21  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
22  * KIND, either express or implied.
23  *
24  ***************************************************************************/
25 
26 #include "curl_setup.h"
27 
28 #if defined(USE_GSKIT) || defined(USE_NSS) || defined(USE_GNUTLS) || \
29     defined(USE_CYASSL) || defined(USE_SCHANNEL)
30 
31 #include "urldata.h"
32 
33 /*
34  * Constants.
35  */
36 
37 /* Largest supported ASN.1 structure. */
38 #define CURL_ASN1_MAX                   ((size_t) 0x40000)      /* 256K */
39 
40 /* ASN.1 classes. */
41 #define CURL_ASN1_UNIVERSAL             0
42 #define CURL_ASN1_APPLICATION           1
43 #define CURL_ASN1_CONTEXT_SPECIFIC      2
44 #define CURL_ASN1_PRIVATE               3
45 
46 /* ASN.1 types. */
47 #define CURL_ASN1_BOOLEAN               1
48 #define CURL_ASN1_INTEGER               2
49 #define CURL_ASN1_BIT_STRING            3
50 #define CURL_ASN1_OCTET_STRING          4
51 #define CURL_ASN1_NULL                  5
52 #define CURL_ASN1_OBJECT_IDENTIFIER     6
53 #define CURL_ASN1_OBJECT_DESCRIPTOR     7
54 #define CURL_ASN1_INSTANCE_OF           8
55 #define CURL_ASN1_REAL                  9
56 #define CURL_ASN1_ENUMERATED            10
57 #define CURL_ASN1_EMBEDDED              11
58 #define CURL_ASN1_UTF8_STRING           12
59 #define CURL_ASN1_RELATIVE_OID          13
60 #define CURL_ASN1_SEQUENCE              16
61 #define CURL_ASN1_SET                   17
62 #define CURL_ASN1_NUMERIC_STRING        18
63 #define CURL_ASN1_PRINTABLE_STRING      19
64 #define CURL_ASN1_TELETEX_STRING        20
65 #define CURL_ASN1_VIDEOTEX_STRING       21
66 #define CURL_ASN1_IA5_STRING            22
67 #define CURL_ASN1_UTC_TIME              23
68 #define CURL_ASN1_GENERALIZED_TIME      24
69 #define CURL_ASN1_GRAPHIC_STRING        25
70 #define CURL_ASN1_VISIBLE_STRING        26
71 #define CURL_ASN1_GENERAL_STRING        27
72 #define CURL_ASN1_UNIVERSAL_STRING      28
73 #define CURL_ASN1_CHARACTER_STRING      29
74 #define CURL_ASN1_BMP_STRING            30
75 
76 
77 /*
78  * Types.
79  */
80 
81 /* ASN.1 parsed element. */
82 typedef struct {
83   const char *  header;         /* Pointer to header byte. */
84   const char *  beg;            /* Pointer to element data. */
85   const char *  end;            /* Pointer to 1st byte after element. */
86   unsigned char class;          /* ASN.1 element class. */
87   unsigned char tag;            /* ASN.1 element tag. */
88   bool          constructed;    /* Element is constructed. */
89 }  curl_asn1Element;
90 
91 
92 /* ASN.1 OID table entry. */
93 typedef struct {
94   const char *  numoid;         /* Dotted-numeric OID. */
95   const char *  textoid;        /* OID name. */
96 }  curl_OID;
97 
98 
99 /* X509 certificate: RFC 5280. */
100 typedef struct {
101   curl_asn1Element      certificate;
102   curl_asn1Element      version;
103   curl_asn1Element      serialNumber;
104   curl_asn1Element      signatureAlgorithm;
105   curl_asn1Element      signature;
106   curl_asn1Element      issuer;
107   curl_asn1Element      notBefore;
108   curl_asn1Element      notAfter;
109   curl_asn1Element      subject;
110   curl_asn1Element      subjectPublicKeyInfo;
111   curl_asn1Element      subjectPublicKeyAlgorithm;
112   curl_asn1Element      subjectPublicKey;
113   curl_asn1Element      issuerUniqueID;
114   curl_asn1Element      subjectUniqueID;
115   curl_asn1Element      extensions;
116 }  curl_X509certificate;
117 
118 
119 /*
120  * Prototypes.
121  */
122 
123 const char *Curl_getASN1Element(curl_asn1Element *elem,
124                                  const char *beg, const char *end);
125 const char *Curl_ASN1tostr(curl_asn1Element *elem, int type);
126 const char *Curl_DNtostr(curl_asn1Element *dn);
127 int Curl_parseX509(curl_X509certificate *cert,
128                    const char *beg, const char *end);
129 CURLcode Curl_extract_certinfo(struct connectdata *conn, int certnum,
130                                const char *beg, const char *end);
131 CURLcode Curl_verifyhost(struct connectdata *conn,
132                          const char *beg, const char *end);
133 #endif /* USE_GSKIT or USE_NSS or USE_GNUTLS or USE_CYASSL or USE_SCHANNEL */
134 #endif /* HEADER_CURL_X509ASN1_H */
135