36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
-
+
-
+
-
+
-
-
+
+
-
-
+
+
-
+
|
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30,
31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47,
48, 49, 50, 51, -1, -1, -1, -1, -1
};
OFString*
of_base64_encode(const char *data, size_t len)
of_base64_encode(const char *data, size_t length)
{
OFMutableString *ret = [OFMutableString string];
uint8_t *buf = (uint8_t*)data;
uint8_t *buffer = (uint8_t*)data;
size_t i;
uint8_t rest;
char tb[4];
uint32_t sb;
rest = len % 3;
rest = length % 3;
for (i = 0; i < len - rest; i += 3) {
sb = (buf[i] << 16) | (buf[i + 1] << 8) | buf[i + 2];
for (i = 0; i < length - rest; i += 3) {
sb = (buffer[i] << 16) | (buffer[i + 1] << 8) | buffer[i + 2];
tb[0] = of_base64_encode_table[(sb & 0xFC0000) >> 18];
tb[1] = of_base64_encode_table[(sb & 0x03F000) >> 12];
tb[2] = of_base64_encode_table[(sb & 0x000FC0) >> 6];
tb[3] = of_base64_encode_table[sb & 0x00003F];
[ret appendCStringWithoutUTF8Checking: tb
length: 4];
}
switch (rest) {
case 1:
tb[0] = of_base64_encode_table[buf[i] >> 2];
tb[1] = of_base64_encode_table[(buf[i] & 3) << 4];
tb[0] = of_base64_encode_table[buffer[i] >> 2];
tb[1] = of_base64_encode_table[(buffer[i] & 3) << 4];
tb[2] = tb[3] = '=';
[ret appendCStringWithoutUTF8Checking: tb
length: 4];
break;
case 2:
sb = (buf[i] << 16) | (buf[i + 1] << 8);
sb = (buffer[i] << 16) | (buffer[i + 1] << 8);
tb[0] = of_base64_encode_table[(sb & 0xFC0000) >> 18];
tb[1] = of_base64_encode_table[(sb & 0x03F000) >> 12];
tb[2] = of_base64_encode_table[(sb & 0x000FC0) >> 6];
tb[3] = '=';
[ret appendCStringWithoutUTF8Checking: tb
|
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
-
+
-
+
-
+
-
-
+
+
-
-
+
+
-
-
-
-
+
+
+
+
-
+
-
+
-
+
-
+
-
+
|
* would create a real copy each time -[copy] is called.
*/
ret->isa = [OFString class];
return ret;
}
BOOL
of_base64_decode(OFDataArray *data, const char *str, size_t len)
of_base64_decode(OFDataArray *data, const char *cString, size_t len)
{
const uint8_t *buf = (const uint8_t*)str;
const uint8_t *buffer = (const uint8_t*)cString;
size_t i;
if ((len & 3) != 0)
return NO;
for (i = 0; i < len; i += 4) {
uint32_t sb = 0;
uint8_t cnt = 3;
uint8_t count = 3;
char db[3];
char tmp;
if (buf[i] > 0x7F || buf[i + 1] > 0x7F ||
buf[i + 2] > 0x7F || buf[i + 3] > 0x7F)
if (buffer[i] > 0x7F || buffer[i + 1] > 0x7F ||
buffer[i + 2] > 0x7F || buffer[i + 3] > 0x7F)
return NO;
if (buf[i] == '=' || buf[i + 1] == '=' ||
(buf[i + 2] == '=' && buf[i + 3] != '='))
if (buffer[i] == '=' || buffer[i + 1] == '=' ||
(buffer[i + 2] == '=' && buffer[i + 3] != '='))
return NO;
if (buf[i + 2] == '=')
cnt--;
if (buf[i + 3] == '=')
cnt--;
if (buffer[i + 2] == '=')
count--;
if (buffer[i + 3] == '=')
count--;
if ((tmp = of_base64_decode_table[buf[i]]) == -1)
if ((tmp = of_base64_decode_table[buffer[i]]) == -1)
return NO;
sb |= tmp << 18;
if ((tmp = of_base64_decode_table[buf[i + 1]]) == -1)
if ((tmp = of_base64_decode_table[buffer[i + 1]]) == -1)
return NO;
sb |= tmp << 12;
if ((tmp = of_base64_decode_table[buf[i + 2]]) == -1)
if ((tmp = of_base64_decode_table[buffer[i + 2]]) == -1)
return NO;
sb |= tmp << 6;
if ((tmp = of_base64_decode_table[buf[i + 3]]) == -1)
if ((tmp = of_base64_decode_table[buffer[i + 3]]) == -1)
return NO;
sb |= tmp;
db[0] = (sb & 0xFF0000) >> 16;
db[1] = (sb & 0x00FF00) >> 8;
db[2] = sb & 0x0000FF;
[data addNItems: cnt
[data addNItems: count
fromCArray: db];
}
return YES;
}
|