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authorAdam <Adam@Anope.org>2010-05-25 00:57:25 -0500
committerAdam <Adam@anope.org>2010-06-18 21:04:07 -0400
commit4a2b9ebcf38d6c0a2860b966421b3af125438488 (patch)
treee4af4e59fd29352138db0fb0ff614d50233850b8 /src/base64.c
parent2fba686904e6f78ebab35df171c5757afeebf05d (diff)
Renamed all of source files from .c to .cpp
Diffstat (limited to 'src/base64.c')
-rw-r--r--src/base64.c416
1 files changed, 0 insertions, 416 deletions
diff --git a/src/base64.c b/src/base64.c
deleted file mode 100644
index 3f576e96a..000000000
--- a/src/base64.c
+++ /dev/null
@@ -1,416 +0,0 @@
-/* base64 routines.
- *
- * (C) 2003-2010 Anope Team
- * Contact us at team@anope.org
- *
- * Please read COPYING and README for further details.
- *
- * Based on the original code of Epona by Lara.
- * Based on the original code of Services by Andy Church.
- *
- *
- */
-
-/*
- This is borrowed from Unreal
-*/
-
-#include "services.h"
-
-static char *int_to_base64(long);
-static long base64_to_int(const char *);
-
-const char *base64enc(long i)
-{
- if (i < 0)
- return "0";
- return int_to_base64(i);
-}
-
-long base64dec(const char *b64)
-{
- if (b64)
- return base64_to_int(b64);
- else
- return 0;
-}
-
-static const char Base64[] =
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-static const char Pad64 = '=';
-
-/* (From RFC1521 and draft-ietf-dnssec-secext-03.txt)
- The following encoding technique is taken from RFC 1521 by Borenstein
- and Freed. It is reproduced here in a slightly edited form for
- convenience.
-
- A 65-character subset of US-ASCII is used, enabling 6 bits to be
- represented per printable character. (The extra 65th character, "=",
- is used to signify a special processing function.)
-
- The encoding process represents 24-bit groups of input bits as output
- strings of 4 encoded characters. Proceeding from left to right, a
- 24-bit input group is formed by concatenating 3 8-bit input groups.
- These 24 bits are then treated as 4 concatenated 6-bit groups, each
- of which is translated into a single digit in the base64 alphabet.
-
- Each 6-bit group is used as an index into an array of 64 printable
- characters. The character referenced by the index is placed in the
- output string.
-
- Table 1: The Base64 Alphabet
-
- Value Encoding Value Encoding Value Encoding Value Encoding
- 0 A 17 R 34 i 51 z
- 1 B 18 S 35 j 52 0
- 2 C 19 T 36 k 53 1
- 3 D 20 U 37 l 54 2
- 4 E 21 V 38 m 55 3
- 5 F 22 W 39 n 56 4
- 6 G 23 X 40 o 57 5
- 7 H 24 Y 41 p 58 6
- 8 I 25 Z 42 q 59 7
- 9 J 26 a 43 r 60 8
- 10 K 27 b 44 s 61 9
- 11 L 28 c 45 t 62 +
- 12 M 29 d 46 u 63 /
- 13 N 30 e 47 v
- 14 O 31 f 48 w (pad) =
- 15 P 32 g 49 x
- 16 Q 33 h 50 y
-
- Special processing is performed if fewer than 24 bits are available
- at the end of the data being encoded. A full encoding quantum is
- always completed at the end of a quantity. When fewer than 24 input
- bits are available in an input group, zero bits are added (on the
- right) to form an integral number of 6-bit groups. Padding at the
- end of the data is performed using the '=' character.
-
- Since all base64 input is an integral number of octets, only the
- -------------------------------------------------
- following cases can arise:
-
- (1) the final quantum of encoding input is an integral
- multiple of 24 bits; here, the final unit of encoded
- output will be an integral multiple of 4 characters
- with no "=" padding,
- (2) the final quantum of encoding input is exactly 8 bits;
- here, the final unit of encoded output will be two
- characters followed by two "=" padding characters, or
- (3) the final quantum of encoding input is exactly 16 bits;
- here, the final unit of encoded output will be three
- characters followed by one "=" padding character.
- */
-
-int b64_encode(const char *src, size_t srclength, char *target, size_t targsize)
-{
- size_t datalength = 0;
- unsigned char input[3];
- unsigned char output[4];
- size_t i;
-
- while (2 < srclength)
- {
- input[0] = *src++;
- input[1] = *src++;
- input[2] = *src++;
- srclength -= 3;
-
- output[0] = input[0] >> 2;
- output[1] = ((input[0] & 0x03) << 4) + (input[1] >> 4);
- output[2] = ((input[1] & 0x0f) << 2) + (input[2] >> 6);
- output[3] = input[2] & 0x3f;
-
- if (datalength + 4 > targsize)
- return -1;
- target[datalength++] = Base64[output[0]];
- target[datalength++] = Base64[output[1]];
- target[datalength++] = Base64[output[2]];
- target[datalength++] = Base64[output[3]];
- }
-
- /* Now we worry about padding. */
- if (srclength)
- {
- /* Get what's left. */
- input[0] = input[1] = input[2] = '\0';
- for (i = 0; i < srclength; ++i)
- input[i] = *src++;
-
- output[0] = input[0] >> 2;
- output[1] = ((input[0] & 0x03) << 4) + (input[1] >> 4);
- output[2] = ((input[1] & 0x0f) << 2) + (input[2] >> 6);
-
- if (datalength + 4 > targsize)
- return -1;
- target[datalength++] = Base64[output[0]];
- target[datalength++] = Base64[output[1]];
- if (srclength == 1)
- target[datalength++] = Pad64;
- else
- target[datalength++] = Base64[output[2]];
- target[datalength++] = Pad64;
- }
- if (datalength >= targsize)
- return -1;
- target[datalength] = '\0'; /* Returned value doesn't count \0. */
- return datalength;
-}
-
-/* skips all whitespace anywhere.
- converts characters, four at a time, starting at (or after)
- src from base - 64 numbers into three 8 bit bytes in the target area.
- it returns the number of data bytes stored at the target, or -1 on error.
- */
-
-int b64_decode(const char *src, char *target, size_t targsize)
-{
- int tarindex, state, ch;
- char *pos;
-
- state = 0;
- tarindex = 0;
-
- while ((ch = *src++) != '\0')
- {
- if (isspace(ch)) /* Skip whitespace anywhere. */
- continue;
-
- if (ch == Pad64)
- break;
-
- pos = const_cast<char *>(strchr(Base64, ch));
- if (!pos) /* A non-base64 character. */
- return -1;
-
- switch (state)
- {
- case 0:
- if (target)
- {
- if (static_cast<size_t>(tarindex) >= targsize)
- return -1;
- target[tarindex] = (pos - Base64) << 2;
- }
- state = 1;
- break;
- case 1:
- if (target)
- {
- if (static_cast<size_t>(tarindex) + 1 >= targsize)
- return -1;
- target[tarindex] |= (pos - Base64) >> 4;
- target[tarindex + 1] = ((pos - Base64) & 0x0f) << 4;
- }
- ++tarindex;
- state = 2;
- break;
- case 2:
- if (target)
- {
- if (static_cast<size_t>(tarindex) + 1 >= targsize)
- return -1;
- target[tarindex] |= (pos - Base64) >> 2;
- target[tarindex + 1] = ((pos - Base64) & 0x03) << 6;
- }
- ++tarindex;
- state = 3;
- break;
- case 3:
- if (target)
- {
- if (static_cast<size_t>(tarindex) >= targsize)
- return -1;
- target[tarindex] |= (pos - Base64);
- }
- ++tarindex;
- state = 0;
- break;
- default:
- abort();
- }
- }
-
- /*
- * We are done decoding Base-64 chars. Let's see if we ended
- * on a byte boundary, and/or with erroneous trailing characters.
- */
-
- if (ch == Pad64) /* We got a pad char. */
- {
- ch = *src++; /* Skip it, get next. */
- switch (state)
- {
- case 0: /* Invalid = in first position */
- case 1: /* Invalid = in second position */
- return -1;
-
- case 2: /* Valid, means one byte of info */
- /* Skip any number of spaces. */
- for (; ch != '\0'; ch = *src++)
- if (!isspace(ch))
- break;
- /* Make sure there is another trailing = sign. */
- if (ch != Pad64)
- return -1;
- ch = *src++; /* Skip the = */
- /* Fall through to "single trailing =" case. */
- /* FALLTHROUGH */
-
- case 3: /* Valid, means two bytes of info */
- /*
- * We know this char is an =. Is there anything but
- * whitespace after it?
- */
- for (; ch != '\0'; ch = *src++)
- if (!isspace(ch))
- return -1;
-
- /*
- * Now make sure for cases 2 and 3 that the "extra"
- * bits that slopped past the last full byte were
- * zeros. If we don't check them, they become a
- * subliminal channel.
- */
- if (target && target[tarindex])
- return -1;
- }
- }
- else
- {
- /*
- * We ended by seeing the end of the string. Make sure we
- * have no partial bytes lying around.
- */
- if (state)
- return -1;
- }
-
- return tarindex;
-}
-
-const char* encode_ip(unsigned char *ip)
-{
- static char buf[25];
- unsigned char *cp;
- struct in_addr ia; /* For IPv4 */
- char *s_ip; /* Signed ip string */
-
- if (!ip)
- return "*";
-
- if (strchr(reinterpret_cast<char *>(ip), ':'))
- return NULL;
- else
- {
- s_ip = str_signed(ip);
- ia.s_addr = inet_addr(s_ip);
- cp = reinterpret_cast<unsigned char *>(ia.s_addr);
- b64_encode(reinterpret_cast<const char *>(&cp), sizeof(struct in_addr), buf, 25);
- }
- return buf;
-}
-
-int decode_ip(const char *buf)
-{
- int len = strlen(buf);
- char targ[25];
- struct in_addr ia;
-
- b64_decode(buf, targ, 25);
- ia = *reinterpret_cast<struct in_addr *>(targ);
- if (len == 24) /* IPv6 */
- return 0;
- else if (len == 8) /* IPv4 */
- return ia.s_addr;
- else /* Error?? */
- return 0;
-}
-
-/* ':' and '#' and '&' and '+' and '@' must never be in this table. */
-/* these tables must NEVER CHANGE! >) */
-char int6_to_base64_map[] = {
- '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',
- 'E', 'F',
- 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
- 'U', 'V',
- 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
- 'k', 'l',
- 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
- '{', '}'
-};
-
-char base64_to_int6_map[] = {
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1,
- -1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
- 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, -1, -1, -1, -1, -1,
- -1, 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, -1, 63, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
-};
-
-static char *int_to_base64(long val)
-{
- /* 32/6 == max 6 bytes for representation,
- * +1 for the null, +1 for byte boundaries
- */
- static char base64buf[8];
- long i = 7;
-
- base64buf[i] = '\0';
-
- /* Temporary debugging code.. remove before 2038 ;p.
- * This might happen in case of 64bit longs (opteron/ia64),
- * if the value is then too large it can easily lead to
- * a buffer underflow and thus to a crash. -- Syzop
- */
- if (val > 2147483647L)
- abort();
-
- do
- {
- base64buf[--i] = int6_to_base64_map[val & 63];
- } while (val >>= 6);
-
- return base64buf + i;
-}
-
-static long base64_to_int(const char *b64)
-{
- int v = base64_to_int6_map[static_cast<const unsigned char>(*b64++)];
-
- if (!b64)
- return 0;
-
- while (*b64)
- {
- v <<= 6;
- v += base64_to_int6_map[static_cast<const unsigned char>(*b64++)];
- }
-
- return v;
-}
-
-long base64dects(const char *ts)
-{
- if (!ts)
- return 0;
-
- char *token = myStrGetToken(ts, '!', 1);
- if (!token)
- return strtoul(ts, NULL, 10);
-
- long value = base64dec(token);
- delete [] token;
- return value;
-}