10 #include <stdio.h> /* for FILE * */
11 #include <stdarg.h> /* for va_list */
12 #include <time.h> /* for struct tm */
21 typedef struct Filename Filename;
22 typedef struct FontSpec FontSpec;
24 unsigned long parse_blocksize(const char *bs);
25 char ctrlparse(char *s, char **next);
27 size_t host_strcspn(const char *s, const char *set);
28 char *host_strchr(const char *s, int c);
29 char *host_strrchr(const char *s, int c);
30 char *host_strduptrim(const char *s);
32 char *dupstr(const char *s);
33 char *dupcat(const char *s1, ...);
34 char *dupprintf(const char *fmt, ...)
36 __attribute__ ((format (printf, 1, 2)))
39 char *dupvprintf(const char *fmt, va_list ap);
40 void burnstr(char *string);
42 /* String-to-Unicode converters that auto-allocate the destination and
43 * work around the rather deficient interface of mb_to_wc.
45 * These actually live in miscucs.c, not misc.c (the distinction being
46 * that the former is only linked into tools that also have the main
47 * Unicode support). */
48 wchar_t *dup_mb_to_wc_c(int codepage, int flags, const char *string, int len);
49 wchar_t *dup_mb_to_wc(int codepage, int flags, const char *string);
53 char *fgetline(FILE *fp);
54 int strstartswith(const char *s, const char *t);
55 int strendswith(const char *s, const char *t);
57 void base64_encode_atom(unsigned char *data, int n, char *out);
58 int base64_decode_atom(char *atom, unsigned char *out);
60 struct bufchain_granule;
61 typedef struct bufchain_tag {
62 struct bufchain_granule *head, *tail;
63 int buffersize; /* current amount of buffered data */
66 void bufchain_init(bufchain *ch);
67 void bufchain_clear(bufchain *ch);
68 int bufchain_size(bufchain *ch);
69 void bufchain_add(bufchain *ch, const void *data, int len);
70 void bufchain_prefix(bufchain *ch, void **data, int *len);
71 void bufchain_consume(bufchain *ch, int len);
72 void bufchain_fetch(bufchain *ch, void *data, int len);
74 int validate_manual_hostkey(char *key);
76 struct tm ltime(void);
78 /* Wipe sensitive data out of memory that's about to be freed. Simpler
79 * than memset because we don't need the fill char parameter; also
80 * attempts (by fiddly use of volatile) to inhibit the compiler from
81 * over-cleverly trying to optimise the memset away because it knows
82 * the variable is going out of scope. */
83 void smemclr(void *b, size_t len);
85 /* Compare two fixed-length chunks of memory for equality, without
86 * data-dependent control flow (so an attacker with a very accurate
87 * stopwatch can't try to guess where the first mismatching byte was).
88 * Returns 0 for mismatch or 1 for equality (unlike memcmp), hinted at
89 * by the 'eq' in the name. */
90 int smemeq(const void *av, const void *bv, size_t len);
93 * Debugging functions.
95 * Output goes to debug.log
97 * debug(()) (note the double brackets) is like printf().
99 * dmemdump() and dmemdumpl() both do memory dumps. The difference
100 * is that dmemdumpl() is more suited for when the memory address is
101 * important (say because you'll be recording pointer values later
102 * on). dmemdump() is more concise.
106 void debug_printf(char *fmt, ...);
107 void debug_memdump(void *buf, int len, int L);
108 #define debug(x) (debug_printf x)
109 #define dmemdump(buf,len) debug_memdump (buf, len, 0);
110 #define dmemdumpl(buf,len) debug_memdump (buf, len, 1);
113 #define dmemdump(buf,len)
114 #define dmemdumpl(buf,len)
118 #define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
122 #define min(x,y) ( (x) < (y) ? (x) : (y) )
125 #define max(x,y) ( (x) > (y) ? (x) : (y) )
128 #define GET_32BIT_LSB_FIRST(cp) \
129 (((unsigned long)(unsigned char)(cp)[0]) | \
130 ((unsigned long)(unsigned char)(cp)[1] << 8) | \
131 ((unsigned long)(unsigned char)(cp)[2] << 16) | \
132 ((unsigned long)(unsigned char)(cp)[3] << 24))
134 #define PUT_32BIT_LSB_FIRST(cp, value) ( \
135 (cp)[0] = (unsigned char)(value), \
136 (cp)[1] = (unsigned char)((value) >> 8), \
137 (cp)[2] = (unsigned char)((value) >> 16), \
138 (cp)[3] = (unsigned char)((value) >> 24) )
140 #define GET_16BIT_LSB_FIRST(cp) \
141 (((unsigned long)(unsigned char)(cp)[0]) | \
142 ((unsigned long)(unsigned char)(cp)[1] << 8))
144 #define PUT_16BIT_LSB_FIRST(cp, value) ( \
145 (cp)[0] = (unsigned char)(value), \
146 (cp)[1] = (unsigned char)((value) >> 8) )
148 #define GET_32BIT_MSB_FIRST(cp) \
149 (((unsigned long)(unsigned char)(cp)[0] << 24) | \
150 ((unsigned long)(unsigned char)(cp)[1] << 16) | \
151 ((unsigned long)(unsigned char)(cp)[2] << 8) | \
152 ((unsigned long)(unsigned char)(cp)[3]))
154 #define GET_32BIT(cp) GET_32BIT_MSB_FIRST(cp)
156 #define PUT_32BIT_MSB_FIRST(cp, value) ( \
157 (cp)[0] = (unsigned char)((value) >> 24), \
158 (cp)[1] = (unsigned char)((value) >> 16), \
159 (cp)[2] = (unsigned char)((value) >> 8), \
160 (cp)[3] = (unsigned char)(value) )
162 #define PUT_32BIT(cp, value) PUT_32BIT_MSB_FIRST(cp, value)
164 #define GET_16BIT_MSB_FIRST(cp) \
165 (((unsigned long)(unsigned char)(cp)[0] << 8) | \
166 ((unsigned long)(unsigned char)(cp)[1]))
168 #define PUT_16BIT_MSB_FIRST(cp, value) ( \
169 (cp)[0] = (unsigned char)((value) >> 8), \
170 (cp)[1] = (unsigned char)(value) )