1fb3cba0 |
1 | /* |
2 | */ |
3 | |
4 | #ifndef MECHS_H |
5 | #define MECHS_H |
6 | |
7 | #include <stdio.h> |
8 | #include <time.h> |
9 | |
10 | #include "automech.h" |
11 | |
12 | struct buffer { |
13 | unsigned char *base; |
14 | unsigned char *start; |
15 | size_t size; |
16 | }; |
17 | |
18 | struct mechdata; |
19 | |
20 | typedef void mes_functype(struct mechdata **md_r, int *maxprefix_io, int *maxsuffix_io); |
21 | typedef void mds_functype(struct mechdata **md_r); |
22 | |
23 | typedef void menc_functype(struct mechdata *md, struct buffer*); |
24 | typedef const char *mdec_functype(struct mechdata *md, struct buffer*); |
25 | |
26 | struct mechanism { |
27 | const char *name; |
28 | mes_functype *encsetup; |
29 | mds_functype *decsetup; |
30 | menc_functype *encode; |
31 | mdec_functype *decode; |
32 | }; |
33 | |
34 | extern const struct mechanism *const mechanismlists[]; |
35 | |
36 | /* setup function may call getarg_xxx functions and then |
37 | * reads/writes key material to/from fd |
38 | * |
39 | * setup_in function may increase maxprefix and maxsuffix |
40 | * code functions modify buffer in place |
41 | * decode function returns message to print |
42 | */ |
43 | |
44 | const char *getarg_string(void); |
45 | unsigned long getarg_ulong(void); |
46 | |
47 | extern char programid[]; |
48 | |
49 | void *buf_append(struct buffer *buf, size_t amount); |
50 | void *buf_prepend(struct buffer *buf, size_t amount); |
51 | void *buf_unappend(struct buffer *buf, size_t amount); /* may give 0 */ |
52 | void *buf_unprepend(struct buffer *buf, size_t amount); /* may give 0 */ |
53 | |
54 | void sysfail(const char *msg); |
55 | void fail(const char *msg); |
56 | void sysdiag(const char *msg); |
57 | void diag(const char *msg); |
58 | |
59 | time_t now(void); |
60 | void *xmalloc(size_t sz); |
61 | void get_random(void *ptr, size_t sz); |
62 | void random_key(void *ptr, size_t sz); |
63 | |
64 | void arg_assert_fail(const char *msg); |
65 | #define arg_assert(v) (v ? (void)0 : arg_assert_fail(#v)) |
66 | |
67 | #define XMALLOC(variable) ((variable)= xmalloc(sizeof(*(variable)))) |
68 | |
69 | #define BUF_UNSOMEEND(var,buf,sz,whichend) \ |
70 | do { var= whichend(buf,sz); if (!var) return "message truncated"; } while(0) |
71 | #define BUF_UNAPPEND(var,buf,sz) BUF_UNSOMEEND(var,buf,sz,buf_unappend) |
72 | #define BUF_UNPREPEND(var,buf,sz) BUF_UNSOMEEND(var,buf,sz,buf_unprepend) |
73 | |
74 | #define STANDARD_MECHANISMLIST(mechstring,filename) \ |
75 | const struct mechanism mechlist_##filename []= { \ |
76 | STANDARD_MECHANISM(mechstring,filename) \ |
77 | { 0 } \ |
78 | }; |
79 | |
80 | #define STANDARD_MECHANISM(mechstring,mechname) \ |
81 | { mechstring, mes_##mechname, mds_##mechname, menc_##mechname, mdec_##mechname }, |
82 | |
83 | #endif |