dist/dhcp/includes/isc-dhcp/dst.h

   1 #ifndef DST_H
   2 #define DST_H
   3
   4 #ifndef HAS_DST_KEY
   5 typedef struct dst_key {
   6         char    *dk_key_name;   /* name of the key */
   7         int     dk_key_size;    /* this is the size of the key in bits */
   8         int     dk_proto;       /* what protocols this key can be used for */
   9         int     dk_alg;         /* algorithm number from key record */
  10         unsigned dk_flags;     /* and the flags of the public key */
  11         unsigned dk_id;        /* identifier of the key */
  12 } DST_KEY;
  13 #endif /* HAS_DST_KEY */
  14
  15 /*
  16  * DST Crypto API defintions
  17  */
  18 void     dst_init(void);
  19 int      dst_check_algorithm(const int);
  20
  21 int dst_sign_data(const int mode,        /* specifies INIT/UPDATE/FINAL/ALL */
  22                   DST_KEY *in_key,       /* the key to use */
  23                   void **context,        /* pointer to state structure */
  24                   const u_char *data,    /* data to be signed */
  25                   const unsigned len,    /* length of input data */
  26                   u_char *signature,     /* buffer to write signature to */
  27                   const unsigned sig_len); /* size of output buffer */
  28
  29 int dst_verify_data(const int mode,      /* specifies INIT/UPDATE/FINAL/ALL */
  30                     DST_KEY *in_key,     /* the key to use */
  31                     void **context,      /* pointer to state structure */
  32                     const u_char *data,  /* data to be verified */
  33                     const unsigned len,  /* length of input data */
  34                     const u_char *signature,/* buffer containing signature */
  35                     const unsigned sig_len);     /* length of signature */
  36
  37
  38 DST_KEY *dst_read_key(const char *in_name,   /* name of key */
  39                       const unsigned in_id, /* key tag identifier */
  40                       const int in_alg,      /* key algorithm */
  41                       const int key_type);   /* Private/PublicKey wanted*/
  42
  43 int      dst_write_key(const DST_KEY *key,  /* key to write out */
  44                        const int key_type); /* Public/Private */
  45
  46 DST_KEY *dst_dnskey_to_key(const char *in_name, /* KEY record name */
  47                            const u_char *key,   /* KEY RDATA */
  48                            const unsigned len); /* size of input buffer*/
  49
  50
  51 int      dst_key_to_dnskey(const DST_KEY *key,  /* key to translate */
  52                            u_char *out_storage, /* output buffer */
  53                            const unsigned out_len); /* size of out_storage*/
  54
  55
  56 DST_KEY *dst_buffer_to_key(const char *key_name,  /* name of the key */
  57                            const int alg,         /* algorithm */
  58                            const unsigned flags,  /* dns flags */
  59                            const int protocol,    /* dns protocol */
  60                            const u_char *key_buf, /* key in dns wire fmt */
  61                            const unsigned key_len);       /* size of key */
  62
  63
  64 int     dst_key_to_buffer(DST_KEY *key, u_char *out_buff, unsigned buf_len);
  65
  66 DST_KEY *dst_generate_key(const char *name,    /* name of new key */
  67                           const int bits,      /* size of new key */
  68                           const int exp,       /* alg dependent parameter*/
  69                           const unsigned flags,     /* key DNS flags */
  70                           const int protocol, /* key DNS protocol */
  71                           const int alg);       /* key algorithm to generate */
  72
  73 DST_KEY *dst_free_key(DST_KEY *f_key);
  74 int      dst_compare_keys(const DST_KEY *key1, const DST_KEY *key2);
  75
  76 int     dst_sig_size(DST_KEY *key);
  77
  78 int     dst_random(const int mode, unsigned wanted, u_char *outran);
  79
  80
  81 /* support for dns key tags/ids */
  82 u_int16_t dst_s_dns_key_id(const u_char *dns_key_rdata,
  83                            const unsigned rdata_len);
  84 u_int16_t dst_s_id_calc(const u_char *key_data, const unsigned key_len);
  85
  86 /* Used by callers as well as by the library.  */
  87 #define RAW_KEY_SIZE    8192        /* large enough to store any key */
  88
  89 /* DST_API control flags */
  90 /* These are used used in functions dst_sign_data and dst_verify_data */
  91 #define SIG_MODE_INIT           1  /* initalize digest */
  92 #define SIG_MODE_UPDATE         2  /* add data to digest */
  93 #define SIG_MODE_FINAL          4  /* generate/verify signature */
  94 #define SIG_MODE_ALL            (SIG_MODE_INIT|SIG_MODE_UPDATE|SIG_MODE_FINAL)
  95
  96 /* Flags for dst_read_private_key()  */
  97 #define DST_FORCE_READ          0x1000000
  98 #define DST_CAN_SIGN            0x010F
  99 #define DST_NO_AUTHEN           0x8000
 100 #define DST_EXTEND_FLAG         0x1000
 101 #define DST_STANDARD            0
 102 #define DST_PRIVATE             0x2000000
 103 #define DST_PUBLIC              0x4000000
 104 #define DST_RAND_SEMI           1
 105 #define DST_RAND_STD            2
 106 #define DST_RAND_KEY            3
 107 #define DST_RAND_DSS            4
 108
 109
 110 /* DST algorithm codes */
 111 #define KEY_RSA                 1
 112 #define KEY_DH                  2
 113 #define KEY_DSA                 3
 114 #define KEY_PRIVATE             254
 115 #define KEY_EXPAND              255
 116 #define KEY_HMAC_MD5            157
 117 #define KEY_HMAC_SHA1           158
 118 #define UNKNOWN_KEYALG          0
 119 #define DST_MAX_ALGS            KEY_HMAC_SHA1
 120
 121 /* DST constants to locations in KEY record  changes in new KEY record */
 122 #define DST_FLAGS_SIZE          2
 123 #define DST_KEY_PROT            2
 124 #define DST_KEY_ALG             3
 125 #define DST_EXT_FLAG            4
 126 #define DST_KEY_START           4
 127
 128 #ifndef SIGN_F_NOKEY
 129 #define SIGN_F_NOKEY            0xC000
 130 #endif
 131
 132 /* error codes from dst routines */
 133 #define SIGN_INIT_FAILURE       (-23)
 134 #define SIGN_UPDATE_FAILURE     (-24)
 135 #define SIGN_FINAL_FAILURE      (-25)
 136 #define VERIFY_INIT_FAILURE     (-26)
 137 #define VERIFY_UPDATE_FAILURE   (-27)
 138 #define VERIFY_FINAL_FAILURE    (-28)
 139 #define MISSING_KEY_OR_SIGNATURE (-30)
 140 #define UNSUPPORTED_KEYALG      (-31)
 141
 142 #endif /* DST_H */