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);
44 char *fgetline(FILE *fp);
46 void base64_encode_atom(unsigned char *data, int n, char *out);
47 int base64_decode_atom(char *atom, unsigned char *out);
49 struct bufchain_granule;
50 typedef struct bufchain_tag {
51 struct bufchain_granule *head, *tail;
52 int buffersize; /* current amount of buffered data */
55 void bufchain_init(bufchain *ch);
56 void bufchain_clear(bufchain *ch);
57 int bufchain_size(bufchain *ch);
58 void bufchain_add(bufchain *ch, const void *data, int len);
59 void bufchain_prefix(bufchain *ch, void **data, int *len);
60 void bufchain_consume(bufchain *ch, int len);
61 void bufchain_fetch(bufchain *ch, void *data, int len);
63 int validate_manual_hostkey(char *key);
65 struct tm ltime(void);
67 /* Wipe sensitive data out of memory that's about to be freed. Simpler
68 * than memset because we don't need the fill char parameter; also
69 * attempts (by fiddly use of volatile) to inhibit the compiler from
70 * over-cleverly trying to optimise the memset away because it knows
71 * the variable is going out of scope. */
72 void smemclr(void *b, size_t len);
74 /* Compare two fixed-length chunks of memory for equality, without
75 * data-dependent control flow (so an attacker with a very accurate
76 * stopwatch can't try to guess where the first mismatching byte was).
77 * Returns 0 for mismatch or 1 for equality (unlike memcmp), hinted at
78 * by the 'eq' in the name. */
79 int smemeq(const void *av, const void *bv, size_t len);
82 * Debugging functions.
84 * Output goes to debug.log
86 * debug(()) (note the double brackets) is like printf().
88 * dmemdump() and dmemdumpl() both do memory dumps. The difference
89 * is that dmemdumpl() is more suited for when the memory address is
90 * important (say because you'll be recording pointer values later
91 * on). dmemdump() is more concise.
95 void debug_printf(char *fmt, ...);
96 void debug_memdump(void *buf, int len, int L);
97 #define debug(x) (debug_printf x)
98 #define dmemdump(buf,len) debug_memdump (buf, len, 0);
99 #define dmemdumpl(buf,len) debug_memdump (buf, len, 1);
102 #define dmemdump(buf,len)
103 #define dmemdumpl(buf,len)
107 #define lenof(x) ( (sizeof((x))) / (sizeof(*(x))))
111 #define min(x,y) ( (x) < (y) ? (x) : (y) )
114 #define max(x,y) ( (x) > (y) ? (x) : (y) )
117 #define GET_32BIT_LSB_FIRST(cp) \
118 (((unsigned long)(unsigned char)(cp)[0]) | \
119 ((unsigned long)(unsigned char)(cp)[1] << 8) | \
120 ((unsigned long)(unsigned char)(cp)[2] << 16) | \
121 ((unsigned long)(unsigned char)(cp)[3] << 24))
123 #define PUT_32BIT_LSB_FIRST(cp, value) ( \
124 (cp)[0] = (unsigned char)(value), \
125 (cp)[1] = (unsigned char)((value) >> 8), \
126 (cp)[2] = (unsigned char)((value) >> 16), \
127 (cp)[3] = (unsigned char)((value) >> 24) )
129 #define GET_16BIT_LSB_FIRST(cp) \
130 (((unsigned long)(unsigned char)(cp)[0]) | \
131 ((unsigned long)(unsigned char)(cp)[1] << 8))
133 #define PUT_16BIT_LSB_FIRST(cp, value) ( \
134 (cp)[0] = (unsigned char)(value), \
135 (cp)[1] = (unsigned char)((value) >> 8) )
137 #define GET_32BIT_MSB_FIRST(cp) \
138 (((unsigned long)(unsigned char)(cp)[0] << 24) | \
139 ((unsigned long)(unsigned char)(cp)[1] << 16) | \
140 ((unsigned long)(unsigned char)(cp)[2] << 8) | \
141 ((unsigned long)(unsigned char)(cp)[3]))
143 #define GET_32BIT(cp) GET_32BIT_MSB_FIRST(cp)
145 #define PUT_32BIT_MSB_FIRST(cp, value) ( \
146 (cp)[0] = (unsigned char)((value) >> 24), \
147 (cp)[1] = (unsigned char)((value) >> 16), \
148 (cp)[2] = (unsigned char)((value) >> 8), \
149 (cp)[3] = (unsigned char)(value) )
151 #define PUT_32BIT(cp, value) PUT_32BIT_MSB_FIRST(cp, value)
153 #define GET_16BIT_MSB_FIRST(cp) \
154 (((unsigned long)(unsigned char)(cp)[0] << 8) | \
155 ((unsigned long)(unsigned char)(cp)[1]))
157 #define PUT_16BIT_MSB_FIRST(cp, value) ( \
158 (cp)[0] = (unsigned char)((value) >> 8), \
159 (cp)[1] = (unsigned char)(value) )