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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 - 2019, 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_WOLFSSL) || 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_WOLFSSL or USE_SCHANNEL */
  134: #endif /* HEADER_CURL_X509ASN1_H */