#include <mLib/alloc.h>
#include <mLib/arena.h>
+#include <mLib/base64.h>
#include <mLib/bres.h>
#include <mLib/dstr.h>
#include <mLib/env.h>
#define T_KEYSET 32u
#define T_KEYEXCH 64u
#define T_KEYMGMT 128u
+#define T_CHAL 256u
-#define T_ALL 255u
+#define T_ALL 511u
/* --- Units --- */
struct sockaddr_in sin;
} addr;
+/* --- Sequence number checking --- */
+
+typedef struct seqwin {
+ uint32 seq; /* First acceptable input sequence */
+ uint32 win; /* Window of acceptable numbers */
+} seqwin;
+
+#define SEQ_WINSZ 32 /* Bits in sequence number window */
+
/* --- A symmetric keyset --- *
*
* A keyset contains a set of symmetric keys for encrypting and decrypting
size_t tagsz; /* Length to truncate MAC tags */
gmac *min, *mout; /* Keyset MACs for integrity */
uint32 oseq; /* Outbound sequence number */
- uint32 iseq, iwin; /* Inbound sequence number */
+ seqwin iseq; /* Inbound sequence number */
} keyset;
-#define KS_SEQWINSZ 32 /* Bits in sequence number window */
-
#define KSF_LISTEN 1u /* Don't encrypt packets yet */
#define KSF_LINK 2u /* Key is in a linked list */
void (*cancel)(struct admin_bgop *); /* Destructor function */
} admin_bgop;
-typedef struct admin_addop {
+typedef struct admin_resop {
admin_bgop bg; /* Background operation header */
- peerspec peer; /* Peer pending creation */
- char *paddr; /* Hostname to be resolved */
+ char *addr; /* Hostname to be resolved */
bres_client r; /* Background resolver task */
sel_timer t; /* Timer for resolver */
+ addr sa; /* Socket address */
+ size_t sasz; /* Socket address size */
+ void (*func)(struct admin_resop *, int); /* Handler */
+} admin_resop;
+
+enum { ARES_OK, ARES_FAIL };
+
+typedef struct admin_addop {
+ admin_resop r; /* Name resolution header */
+ peerspec peer; /* Peer pending creation */
} admin_addop;
+typedef struct admin_greetop {
+ admin_resop r; /* Name resolution header */
+ void *c; /* Challenge block */
+ size_t sz; /* Length of challenge */
+} admin_greetop;
+
typedef struct admin_pingop {
admin_bgop bg; /* Background operation header */
ping ping; /* Ping pending response */
extern sel_state sel; /* Global I/O event state */
extern group *gg; /* The group we work in */
extern mp *kpriv; /* Our private key */
+extern ge *kpub; /* Our public key */
extern octet buf_i[PKBUFSZ], buf_o[PKBUFSZ], buf_t[PKBUFSZ];
extern const tunnel_ops *tunnels[]; /* Table of tunnels (0-term) */
extern const tunnel_ops *tun_default; /* Default tunnel to use */
extern int ksl_decrypt(keyset **/*ksroot*/, unsigned /*ty*/,
buf */*b*/, buf */*bb*/);
+/*----- Challenges --------------------------------------------------------*/
+
+/* --- @c_new@ --- *
+ *
+ * Arguments: @buf *b@ = where to put the challenge
+ *
+ * Returns: Zero if OK, nonzero on error.
+ *
+ * Use: Issues a new challenge.
+ */
+
+extern int c_new(buf */*b*/);
+
+/* --- @c_check@ --- *
+ *
+ * Arguments: @buf *b@ = where to find the challenge
+ *
+ * Returns: Zero if OK, nonzero if it didn't work.
+ *
+ * Use: Checks a challenge. On failure, the buffer is broken.
+ */
+
+extern int c_check(buf */*b*/);
+
/*----- Administration interface ------------------------------------------*/
+#define A_END ((char *)0)
+
/* --- @a_warn@ --- *
*
* Arguments: @const char *fmt@ = pointer to format string
extern void p_pingdone(ping */*p*/, int /*rc*/);
+/* --- @p_greet@ --- *
+ *
+ * Arguments: @peer *p@ = peer to send to
+ * @const void *c@ = pointer to challenge
+ * @size_t sz@ = size of challenge
+ *
+ * Returns: ---
+ *
+ * Use: Sends a greeting packet.
+ */
+
+extern void p_greet(peer */*p*/, const void */*c*/, size_t /*sz*/);
+
/* --- @p_tun@ --- *
*
* Arguments: @peer *p@ = pointer to peer block
extern int mystrieq(const char */*x*/, const char */*y*/);
+/* --- @seq_reset@ --- *
+ *
+ * Arguments: @seqwin *s@ = sequence-checking window
+ *
+ * Returns: ---
+ *
+ * Use: Resets a sequence number window.
+ */
+
+extern void seq_reset(seqwin */*s*/);
+
+/* --- @seq_check@ --- *
+ *
+ * Arguments: @seqwin *s@ = sequence-checking window
+ * @uint32 q@ = sequence number to check
+ * @const char *service@ = service to report message from
+ *
+ * Returns: A @SEQ_@ code.
+ *
+ * Use: Checks a sequence number against the window, updating things
+ * as necessary.
+ */
+
+extern int seq_check(seqwin */*s*/, uint32 /*q*/, const char */*service*/);
+
/*----- That's all, folks -------------------------------------------------*/
#ifdef __cplusplus