/src/httpd/srclib/apr/encoding/apr_base64.c

Source (jump to first uncovered line)
/* Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* base64 encoder/decoder. Originally part of main/util.c
 * but moved here so that support/ab and apr_sha1.c could
 * use it. This meant removing the apr_palloc()s and adding
 * ugly 'len' functions, which is quite a nasty cost.
 */

#include "apr_base64.h"
#if APR_CHARSET_EBCDIC
#include "apr_xlate.h"
#endif                /* APR_CHARSET_EBCDIC */

/* APR__ASSERT() to always abort() on failure (no output when NDEBUG) */
#ifndef NDEBUG
#include <assert.h>
#define APR__ASSERT(cond) assert(cond)
#else
#include "apr.h"
#if APR_HAVE_STDLIB_H
#include <stdlib.h>
#endif
#define APR__ASSERT(cond) do { \
    if (!(cond)) { \
        abort(); \
    } \
} while (0)
#endif

/* Above APR_BASE64_ENCODE_MAX length the encoding can't fit in an int >= 0 */
#define APR_BASE64_ENCODE_MAX 1610612733

/* Above APR_BASE64_DECODE_MAX length the decoding can't fit in an int >= 0 */
#define APR_BASE64_DECODE_MAX 2863311524u

/* aaaack but it's fast and const should make it shared text page. */
static const unsigned char pr2six[256] =
{
#if !APR_CHARSET_EBCDIC
    /* ASCII table */
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64, 64, 64, 63,
    52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64,
    64,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14,
    15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64,
    64, 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, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64
#else /*APR_CHARSET_EBCDIC*/
    /* EBCDIC table */
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 63, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64, 26, 27, 28, 29, 30, 31, 32, 33, 34, 64, 64, 64, 64, 64, 64,
    64, 35, 36, 37, 38, 39, 40, 41, 42, 43, 64, 64, 64, 64, 64, 64,
    64, 64, 44, 45, 46, 47, 48, 49, 50, 51, 64, 64, 64, 64, 64, 64,
    64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
    64,  0,  1,  2,  3,  4,  5,  6,  7,  8, 64, 64, 64, 64, 64, 64,
    64,  9, 10, 11, 12, 13, 14, 15, 16, 17, 64, 64, 64, 64, 64, 64,
    64, 64, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64, 64,
    52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64
#endif /*APR_CHARSET_EBCDIC*/
};

#if APR_CHARSET_EBCDIC
static apr_xlate_t *xlate_to_ebcdic;
static unsigned char os_toascii[256];

APR_DECLARE(apr_status_t) apr_base64init_ebcdic(apr_xlate_t *to_ascii,
                                             apr_xlate_t *to_ebcdic)
{
    int i;
    apr_size_t inbytes_left, outbytes_left;
    apr_status_t rv;
    int onoff;

    /* Only single-byte conversion is supported.
     */
    rv = apr_xlate_sb_get(to_ascii, &onoff);
    if (rv) {
        return rv;
    }
    if (!onoff) { /* If conversion is not single-byte-only */
        return APR_EINVAL;
    }
    rv = apr_xlate_sb_get(to_ebcdic, &onoff);
    if (rv) {
        return rv;
    }
    if (!onoff) { /* If conversion is not single-byte-only */
        return APR_EINVAL;
    }
    xlate_to_ebcdic = to_ebcdic;
    for (i = 0; i < sizeof(os_toascii); i++) {
        os_toascii[i] = i;
    }
    inbytes_left = outbytes_left = sizeof(os_toascii);
    apr_xlate_conv_buffer(to_ascii, os_toascii, &inbytes_left,
                          os_toascii, &outbytes_left);

    return APR_SUCCESS;
}
#endif /*APR_CHARSET_EBCDIC*/

APR_DECLARE(int) apr_base64_decode_len(const char *bufcoded)
{
    register const unsigned char *bufin;
    register apr_size_t nprbytes;

    bufin = (const unsigned char *) bufcoded;
    while (pr2six[*(bufin++)] <= 63);
    nprbytes = (bufin - (const unsigned char *) bufcoded) - 1;
    APR__ASSERT(nprbytes <= APR_BASE64_DECODE_MAX);

    return (int)(((nprbytes + 3u) / 4u) * 3u + 1u);
}

APR_DECLARE(int) apr_base64_decode(char *bufplain, const char *bufcoded)
{
#if APR_CHARSET_EBCDIC
    apr_size_t inbytes_left, outbytes_left;
#endif /* APR_CHARSET_EBCDIC */
    int len;

    len = apr_base64_decode_binary((unsigned char *) bufplain, bufcoded);
#if APR_CHARSET_EBCDIC
    inbytes_left = outbytes_left = len;
    apr_xlate_conv_buffer(xlate_to_ebcdic, bufplain, &inbytes_left,
                          bufplain, &outbytes_left);
#endif                /* APR_CHARSET_EBCDIC */
    bufplain[len] = '\0';
    return len;
}

/* This is the same as apr_base64_decode() except:
 * - no \0 is appended
 * - on EBCDIC machines, the conversion of the output to ebcdic is left out
 */
APR_DECLARE(int) apr_base64_decode_binary(unsigned char *bufplain,
                                          const char *bufcoded)
{
    int nbytesdecoded;
    register const unsigned char *bufin;
    register unsigned char *bufout;
    register apr_size_t nprbytes;

    bufin = (const unsigned char *) bufcoded;
    while (pr2six[*(bufin++)] <= 63);
    nprbytes = (bufin - (const unsigned char *) bufcoded) - 1;
    APR__ASSERT(nprbytes <= APR_BASE64_DECODE_MAX);
    nbytesdecoded = (int)(((nprbytes + 3u) / 4u) * 3u);

    bufout = (unsigned char *) bufplain;
    bufin = (const unsigned char *) bufcoded;

    while (nprbytes >= 4) {
        *(bufout++) =
            (unsigned char) (pr2six[*bufin] << 2 | pr2six[bufin[1]] >> 4);
        *(bufout++) =
            (unsigned char) (pr2six[bufin[1]] << 4 | pr2six[bufin[2]] >> 2);
        *(bufout++) =
            (unsigned char) (pr2six[bufin[2]] << 6 | pr2six[bufin[3]]);
        bufin += 4;
        nprbytes -= 4;
    }

    /* Note: (nprbytes == 1) would be an error, so just ignore that case */
    if (nprbytes > 1) {
        *(bufout++) =
            (unsigned char) (pr2six[*bufin] << 2 | pr2six[bufin[1]] >> 4);
    }
    if (nprbytes > 2) {
        *(bufout++) =
            (unsigned char) (pr2six[bufin[1]] << 4 | pr2six[bufin[2]] >> 2);
    }

    return nbytesdecoded - (int)((4u - nprbytes) & 3u);
}

APR_DECLARE(char *) apr_pbase64_decode(apr_pool_t *p, const char *bufcoded)
{
    char *decoded;

    decoded = (char *) apr_palloc(p, apr_base64_decode_len(bufcoded));
    apr_base64_decode(decoded, bufcoded);

    return decoded;
}

static const char basis_64[] =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";

APR_DECLARE(int) apr_base64_encode_len(int len)
{
    APR__ASSERT(len >= 0 && len <= APR_BASE64_ENCODE_MAX);

    return ((len + 2) / 3 * 4) + 1;
}

APR_DECLARE(int) apr_base64_encode(char *encoded, const char *string, int len)
{
#if !APR_CHARSET_EBCDIC
    return apr_base64_encode_binary(encoded, (const unsigned char *) string, len);
#else /* APR_CHARSET_EBCDIC */
    int i;
    char *p;

    APR__ASSERT(len >= 0 && len <= APR_BASE64_ENCODE_MAX);

    p = encoded;
    for (i = 0; i < len - 2; i += 3) {
        *p++ = basis_64[(os_toascii[string[i]] >> 2) & 0x3F];
        *p++ = basis_64[((os_toascii[string[i]] & 0x3) << 4) |
            ((int) (os_toascii[string[i + 1]] & 0xF0) >> 4)];
        *p++ = basis_64[((os_toascii[string[i + 1]] & 0xF) << 2) |
            ((int) (os_toascii[string[i + 2]] & 0xC0) >> 6)];
        *p++ = basis_64[os_toascii[string[i + 2]] & 0x3F];
    }
    if (i < len) {
        *p++ = basis_64[(os_toascii[string[i]] >> 2) & 0x3F];
        if (i == (len - 1)) {
            *p++ = basis_64[((os_toascii[string[i]] & 0x3) << 4)];
            *p++ = '=';
        }
        else {
            *p++ = basis_64[((os_toascii[string[i]] & 0x3) << 4) |
                ((int) (os_toascii[string[i + 1]] & 0xF0) >> 4)];
            *p++ = basis_64[((os_toascii[string[i + 1]] & 0xF) << 2)];
        }
        *p++ = '=';
    }

    *p++ = '\0';
    return (unsigned int)(p - encoded);
#endif                /* APR_CHARSET_EBCDIC */
}

/* This is the same as apr_base64_encode() except on EBCDIC machines, where
 * the conversion of the input to ascii is left out.
 */
APR_DECLARE(int) apr_base64_encode_binary(char *encoded,
                                      const unsigned char *string, int len)
{
    int i;
    char *p;

    APR__ASSERT(len >= 0 && len <= APR_BASE64_ENCODE_MAX);

    p = encoded;
    for (i = 0; i < len - 2; i += 3) {
        *p++ = basis_64[(string[i] >> 2) & 0x3F];
        *p++ = basis_64[((string[i] & 0x3) << 4) |
            ((int) (string[i + 1] & 0xF0) >> 4)];
        *p++ = basis_64[((string[i + 1] & 0xF) << 2) |
            ((int) (string[i + 2] & 0xC0) >> 6)];
        *p++ = basis_64[string[i + 2] & 0x3F];
    }
    if (i < len) {
        *p++ = basis_64[(string[i] >> 2) & 0x3F];
        if (i == (len - 1)) {
            *p++ = basis_64[((string[i] & 0x3) << 4)];
            *p++ = '=';
        }
        else {
            *p++ = basis_64[((string[i] & 0x3) << 4) |
                ((int) (string[i + 1] & 0xF0) >> 4)];
            *p++ = basis_64[((string[i + 1] & 0xF) << 2)];
        }
        *p++ = '=';
    }

    *p++ = '\0';
    return (unsigned int)(p - encoded);
}

APR_DECLARE(char *) apr_pbase64_encode(apr_pool_t *p, const char *string)
{
    char *encoded;
    apr_size_t len = strlen(string);

    APR__ASSERT(len <= (apr_size_t)APR_BASE64_ENCODE_MAX);
    encoded = (char *) apr_palloc(p, apr_base64_encode_len((int)len));
    apr_base64_encode(encoded, string, (int)len);

    return encoded;
}

Coverage Report

Created: 2025-07-11 06:40

Line	Count	Source (jump to first uncovered line)
1		/* Licensed to the Apache Software Foundation (ASF) under one or more
2		* contributor license agreements. See the NOTICE file distributed with
3		* this work for additional information regarding copyright ownership.
4		* The ASF licenses this file to You under the Apache License, Version 2.0
5		* (the "License"); you may not use this file except in compliance with
6		* the License. You may obtain a copy of the License at
7		*
8		* http://www.apache.org/licenses/LICENSE-2.0
9		*
10		* Unless required by applicable law or agreed to in writing, software
11		* distributed under the License is distributed on an "AS IS" BASIS,
12		* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13		* See the License for the specific language governing permissions and
14		* limitations under the License.
15		*/
16
17		/* base64 encoder/decoder. Originally part of main/util.c
18		* but moved here so that support/ab and apr_sha1.c could
19		* use it. This meant removing the apr_palloc()s and adding
20		* ugly 'len' functions, which is quite a nasty cost.
21		*/
22
23		#include "apr_base64.h"
24		#if APR_CHARSET_EBCDIC
25		#include "apr_xlate.h"
26		#endif /* APR_CHARSET_EBCDIC */
27
28		/* APR__ASSERT() to always abort() on failure (no output when NDEBUG) */
29		#ifndef NDEBUG
30		#include <assert.h>
31	5.06k	#define APR__ASSERT(cond) assert(cond)
32		#else
33		#include "apr.h"
34		#if APR_HAVE_STDLIB_H
35		#include <stdlib.h>
36		#endif
37		#define APR__ASSERT(cond) do { \
38		if (!(cond)) { \
39		abort(); \
40		} \
41		} while (0)
42		#endif
43
44		/* Above APR_BASE64_ENCODE_MAX length the encoding can't fit in an int >= 0 */
45		#define APR_BASE64_ENCODE_MAX 1610612733
46
47		/* Above APR_BASE64_DECODE_MAX length the decoding can't fit in an int >= 0 */
48		#define APR_BASE64_DECODE_MAX 2863311524u
49
50		/* aaaack but it's fast and const should make it shared text page. */
51		static const unsigned char pr2six[256] =
52		{
53		#if !APR_CHARSET_EBCDIC
54		/* ASCII table */
55		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
56		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
57		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64, 64, 64, 63,
58		52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64,
59		64, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
60		15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64,
61		64, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
62		41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 64, 64, 64, 64, 64,
63		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
64		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
65		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
66		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
67		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
68		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
69		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
70		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64
71		#else /APR_CHARSET_EBCDIC/
72		/* EBCDIC table */
73		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
74		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
75		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
76		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
77		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64,
78		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
79		64, 63, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
80		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
81		64, 26, 27, 28, 29, 30, 31, 32, 33, 34, 64, 64, 64, 64, 64, 64,
82		64, 35, 36, 37, 38, 39, 40, 41, 42, 43, 64, 64, 64, 64, 64, 64,
83		64, 64, 44, 45, 46, 47, 48, 49, 50, 51, 64, 64, 64, 64, 64, 64,
84		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
85		64, 0, 1, 2, 3, 4, 5, 6, 7, 8, 64, 64, 64, 64, 64, 64,
86		64, 9, 10, 11, 12, 13, 14, 15, 16, 17, 64, 64, 64, 64, 64, 64,
87		64, 64, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64, 64,
88		52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64
89		#endif /APR_CHARSET_EBCDIC/
90		};
91
92		#if APR_CHARSET_EBCDIC
93		static apr_xlate_t *xlate_to_ebcdic;
94		static unsigned char os_toascii[256];
95
96		APR_DECLARE(apr_status_t) apr_base64init_ebcdic(apr_xlate_t *to_ascii,
97		apr_xlate_t *to_ebcdic)
98		{
99		int i;
100		apr_size_t inbytes_left, outbytes_left;
101		apr_status_t rv;
102		int onoff;
103
104		/* Only single-byte conversion is supported.
105		*/
106		rv = apr_xlate_sb_get(to_ascii, &onoff);
107		if (rv) {
108		return rv;
109		}
110		if (!onoff) { /* If conversion is not single-byte-only */
111		return APR_EINVAL;
112		}
113		rv = apr_xlate_sb_get(to_ebcdic, &onoff);
114		if (rv) {
115		return rv;
116		}
117		if (!onoff) { /* If conversion is not single-byte-only */
118		return APR_EINVAL;
119		}
120		xlate_to_ebcdic = to_ebcdic;
121		for (i = 0; i < sizeof(os_toascii); i++) {
122		os_toascii[i] = i;
123		}
124		inbytes_left = outbytes_left = sizeof(os_toascii);
125		apr_xlate_conv_buffer(to_ascii, os_toascii, &inbytes_left,
126		os_toascii, &outbytes_left);
127
128		return APR_SUCCESS;
129		}
130		#endif /APR_CHARSET_EBCDIC/
131
132		APR_DECLARE(int) apr_base64_decode_len(const char *bufcoded)
133	1.28k	{
134	1.28k	register const unsigned char *bufin;
135	1.28k	register apr_size_t nprbytes;
136
137	1.28k	bufin = (const unsigned char *) bufcoded;
138	8.08k	while (pr2six[*(bufin++)] <= 63);
139	1.28k	nprbytes = (bufin - (const unsigned char *) bufcoded) - 1;
140	1.28k	APR__ASSERT(nprbytes <= APR_BASE64_DECODE_MAX);
141
142	1.28k	return (int)(((nprbytes + 3u) / 4u) * 3u + 1u);
143	1.28k	}
144
145		APR_DECLARE(int) apr_base64_decode(char bufplain, const char bufcoded)
146	1.28k	{
147		#if APR_CHARSET_EBCDIC
148		apr_size_t inbytes_left, outbytes_left;
149		#endif /* APR_CHARSET_EBCDIC */
150	1.28k	int len;
151
152	1.28k	len = apr_base64_decode_binary((unsigned char *) bufplain, bufcoded);
153		#if APR_CHARSET_EBCDIC
154		inbytes_left = outbytes_left = len;
155		apr_xlate_conv_buffer(xlate_to_ebcdic, bufplain, &inbytes_left,
156		bufplain, &outbytes_left);
157		#endif /* APR_CHARSET_EBCDIC */
158	1.28k	bufplain[len] = '\0';
159	1.28k	return len;
160	1.28k	}
161
162		/* This is the same as apr_base64_decode() except:
163		* - no \0 is appended
164		* - on EBCDIC machines, the conversion of the output to ebcdic is left out
165		*/
166		APR_DECLARE(int) apr_base64_decode_binary(unsigned char *bufplain,
167		const char *bufcoded)
168	1.28k	{
169	1.28k	int nbytesdecoded;
170	1.28k	register const unsigned char *bufin;
171	1.28k	register unsigned char *bufout;
172	1.28k	register apr_size_t nprbytes;
173
174	1.28k	bufin = (const unsigned char *) bufcoded;
175	8.08k	while (pr2six[*(bufin++)] <= 63);
176	1.28k	nprbytes = (bufin - (const unsigned char *) bufcoded) - 1;
177	1.28k	APR__ASSERT(nprbytes <= APR_BASE64_DECODE_MAX);
178	1.28k	nbytesdecoded = (int)(((nprbytes + 3u) / 4u) * 3u);
179
180	1.28k	bufout = (unsigned char *) bufplain;
181	1.28k	bufin = (const unsigned char *) bufcoded;
182
183	2.81k	while (nprbytes >= 4) {
184	1.53k	*(bufout++) =
185	1.53k	(unsigned char) (pr2six[*bufin] << 2 \| pr2six[bufin[1]] >> 4);
186	1.53k	*(bufout++) =
187	1.53k	(unsigned char) (pr2six[bufin[1]] << 4 \| pr2six[bufin[2]] >> 2);
188	1.53k	*(bufout++) =
189	1.53k	(unsigned char) (pr2six[bufin[2]] << 6 \| pr2six[bufin[3]]);
190	1.53k	bufin += 4;
191	1.53k	nprbytes -= 4;
192	1.53k	}
193
194		/* Note: (nprbytes == 1) would be an error, so just ignore that case */
195	1.28k	if (nprbytes > 1) {
196	204	*(bufout++) =
197	204	(unsigned char) (pr2six[*bufin] << 2 \| pr2six[bufin[1]] >> 4);
198	204	}
199	1.28k	if (nprbytes > 2) {
200	103	*(bufout++) =
201	103	(unsigned char) (pr2six[bufin[1]] << 4 \| pr2six[bufin[2]] >> 2);
202	103	}
203
204	1.28k	return nbytesdecoded - (int)((4u - nprbytes) & 3u);
205	1.28k	}
206
207		APR_DECLARE(char ) apr_pbase64_decode(apr_pool_t p, const char *bufcoded)
208	0	{
209	0	char *decoded;
210
211	0	decoded = (char *) apr_palloc(p, apr_base64_decode_len(bufcoded));
212	0	apr_base64_decode(decoded, bufcoded);
213
214	0	return decoded;
215	0	}
216
217		static const char basis_64[] =
218		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
219
220		APR_DECLARE(int) apr_base64_encode_len(int len)
221	1.25k	{
222	1.25k	APR__ASSERT(len >= 0 && len <= APR_BASE64_ENCODE_MAX);
223
224	1.25k	return ((len + 2) / 3 * 4) + 1;
225	1.25k	}
226
227		APR_DECLARE(int) apr_base64_encode(char encoded, const char string, int len)
228	1.25k	{
229	1.25k	#if !APR_CHARSET_EBCDIC
230	1.25k	return apr_base64_encode_binary(encoded, (const unsigned char *) string, len);
231		#else /* APR_CHARSET_EBCDIC */
232		int i;
233		char *p;
234
235		APR__ASSERT(len >= 0 && len <= APR_BASE64_ENCODE_MAX);
236
237		p = encoded;
238		for (i = 0; i < len - 2; i += 3) {
239		*p++ = basis_64[(os_toascii[string[i]] >> 2) & 0x3F];
240		*p++ = basis_64[((os_toascii[string[i]] & 0x3) << 4) \|
241		((int) (os_toascii[string[i + 1]] & 0xF0) >> 4)];
242		*p++ = basis_64[((os_toascii[string[i + 1]] & 0xF) << 2) \|
243		((int) (os_toascii[string[i + 2]] & 0xC0) >> 6)];
244		*p++ = basis_64[os_toascii[string[i + 2]] & 0x3F];
245		}
246		if (i < len) {
247		*p++ = basis_64[(os_toascii[string[i]] >> 2) & 0x3F];
248		if (i == (len - 1)) {
249		*p++ = basis_64[((os_toascii[string[i]] & 0x3) << 4)];
250		*p++ = '=';
251		}
252		else {
253		*p++ = basis_64[((os_toascii[string[i]] & 0x3) << 4) \|
254		((int) (os_toascii[string[i + 1]] & 0xF0) >> 4)];
255		*p++ = basis_64[((os_toascii[string[i + 1]] & 0xF) << 2)];
256		}
257		*p++ = '=';
258		}
259
260		*p++ = '\0';
261		return (unsigned int)(p - encoded);
262		#endif /* APR_CHARSET_EBCDIC */
263	1.25k	}
264
265		/* This is the same as apr_base64_encode() except on EBCDIC machines, where
266		* the conversion of the input to ascii is left out.
267		*/
268		APR_DECLARE(int) apr_base64_encode_binary(char *encoded,
269		const unsigned char *string, int len)
270	1.25k	{
271	1.25k	int i;
272	1.25k	char *p;
273
274	1.25k	APR__ASSERT(len >= 0 && len <= APR_BASE64_ENCODE_MAX);
275
276	1.25k	p = encoded;
277	19.3k	for (i = 0; i < len - 2; i += 3) {
278	18.0k	*p++ = basis_64[(string[i] >> 2) & 0x3F];
279	18.0k	*p++ = basis_64[((string[i] & 0x3) << 4) \|
280	18.0k	((int) (string[i + 1] & 0xF0) >> 4)];
281	18.0k	*p++ = basis_64[((string[i + 1] & 0xF) << 2) \|
282	18.0k	((int) (string[i + 2] & 0xC0) >> 6)];
283	18.0k	*p++ = basis_64[string[i + 2] & 0x3F];
284	18.0k	}
285	1.25k	if (i < len) {
286	600	*p++ = basis_64[(string[i] >> 2) & 0x3F];
287	600	if (i == (len - 1)) {
288	338	*p++ = basis_64[((string[i] & 0x3) << 4)];
289	338	*p++ = '=';
290	338	}
291	262	else {
292	262	*p++ = basis_64[((string[i] & 0x3) << 4) \|
293	262	((int) (string[i + 1] & 0xF0) >> 4)];
294	262	*p++ = basis_64[((string[i + 1] & 0xF) << 2)];
295	262	}
296	600	*p++ = '=';
297	600	}
298
299	1.25k	*p++ = '\0';
300	1.25k	return (unsigned int)(p - encoded);
301	1.25k	}
302
303		APR_DECLARE(char ) apr_pbase64_encode(apr_pool_t p, const char *string)
304	0	{
305	0	char *encoded;
306	0	apr_size_t len = strlen(string);
307
308	0	APR__ASSERT(len <= (apr_size_t)APR_BASE64_ENCODE_MAX);
309	0	encoded = (char *) apr_palloc(p, apr_base64_encode_len((int)len));
310	0	apr_base64_encode(encoded, string, (int)len);
311
312	0	return encoded;
313	0	}