/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.
 */

#undef NDEBUG /* always abort() on assert()ion failure */
#include <assert.h>

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

/* 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;
    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;
    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)
{
    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;

    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;

    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);

    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: 2023-03-26 06:28

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		#undef NDEBUG /* always abort() on assert()ion failure */
24		#include <assert.h>
25
26		#include "apr_base64.h"
27		#if APR_CHARSET_EBCDIC
28		#include "apr_xlate.h"
29		#endif /* APR_CHARSET_EBCDIC */
30
31		/* Above APR_BASE64_ENCODE_MAX length the encoding can't fit in an int >= 0 */
32		#define APR_BASE64_ENCODE_MAX 1610612733
33
34		/* Above APR_BASE64_DECODE_MAX length the decoding can't fit in an int >= 0 */
35		#define APR_BASE64_DECODE_MAX 2863311524u
36
37		/* aaaack but it's fast and const should make it shared text page. */
38		static const unsigned char pr2six[256] =
39		{
40		#if !APR_CHARSET_EBCDIC
41		/* ASCII table */
42		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
43		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
44		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 62, 64, 64, 64, 63,
45		52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64,
46		64, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
47		15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64,
48		64, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
49		41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 64, 64, 64, 64, 64,
50		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
51		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
52		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
53		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
54		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
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, 64, 64, 64, 64, 64
58		#else /APR_CHARSET_EBCDIC/
59		/* EBCDIC table */
60		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
61		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,
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, 62, 64,
65		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
66		64, 63, 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, 26, 27, 28, 29, 30, 31, 32, 33, 34, 64, 64, 64, 64, 64, 64,
69		64, 35, 36, 37, 38, 39, 40, 41, 42, 43, 64, 64, 64, 64, 64, 64,
70		64, 64, 44, 45, 46, 47, 48, 49, 50, 51, 64, 64, 64, 64, 64, 64,
71		64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64,
72		64, 0, 1, 2, 3, 4, 5, 6, 7, 8, 64, 64, 64, 64, 64, 64,
73		64, 9, 10, 11, 12, 13, 14, 15, 16, 17, 64, 64, 64, 64, 64, 64,
74		64, 64, 18, 19, 20, 21, 22, 23, 24, 25, 64, 64, 64, 64, 64, 64,
75		52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 64, 64, 64, 64, 64, 64
76		#endif /APR_CHARSET_EBCDIC/
77		};
78
79		#if APR_CHARSET_EBCDIC
80		static apr_xlate_t *xlate_to_ebcdic;
81		static unsigned char os_toascii[256];
82
83		APR_DECLARE(apr_status_t) apr_base64init_ebcdic(apr_xlate_t *to_ascii,
84		apr_xlate_t *to_ebcdic)
85		{
86		int i;
87		apr_size_t inbytes_left, outbytes_left;
88		apr_status_t rv;
89		int onoff;
90
91		/* Only single-byte conversion is supported.
92		*/
93		rv = apr_xlate_sb_get(to_ascii, &onoff);
94		if (rv) {
95		return rv;
96		}
97		if (!onoff) { /* If conversion is not single-byte-only */
98		return APR_EINVAL;
99		}
100		rv = apr_xlate_sb_get(to_ebcdic, &onoff);
101		if (rv) {
102		return rv;
103		}
104		if (!onoff) { /* If conversion is not single-byte-only */
105		return APR_EINVAL;
106		}
107		xlate_to_ebcdic = to_ebcdic;
108		for (i = 0; i < sizeof(os_toascii); i++) {
109		os_toascii[i] = i;
110		}
111		inbytes_left = outbytes_left = sizeof(os_toascii);
112		apr_xlate_conv_buffer(to_ascii, os_toascii, &inbytes_left,
113		os_toascii, &outbytes_left);
114
115		return APR_SUCCESS;
116		}
117		#endif /APR_CHARSET_EBCDIC/
118
119		APR_DECLARE(int) apr_base64_decode_len(const char *bufcoded)
120	1.29k	{
121	1.29k	register const unsigned char *bufin;
122	1.29k	register apr_size_t nprbytes;
123
124	1.29k	bufin = (const unsigned char *) bufcoded;
125	7.94k	while (pr2six[*(bufin++)] <= 63);
126	1.29k	nprbytes = (bufin - (const unsigned char *) bufcoded) - 1;
127	1.29k	assert(nprbytes <= APR_BASE64_DECODE_MAX);
128
129	1.29k	return (int)(((nprbytes + 3u) / 4u) * 3u + 1u);
130	1.29k	}
131
132		APR_DECLARE(int) apr_base64_decode(char bufplain, const char bufcoded)
133	1.29k	{
134		#if APR_CHARSET_EBCDIC
135		apr_size_t inbytes_left, outbytes_left;
136		#endif /* APR_CHARSET_EBCDIC */
137	1.29k	int len;
138
139	1.29k	len = apr_base64_decode_binary((unsigned char *) bufplain, bufcoded);
140		#if APR_CHARSET_EBCDIC
141		inbytes_left = outbytes_left = len;
142		apr_xlate_conv_buffer(xlate_to_ebcdic, bufplain, &inbytes_left,
143		bufplain, &outbytes_left);
144		#endif /* APR_CHARSET_EBCDIC */
145	1.29k	bufplain[len] = '\0';
146	1.29k	return len;
147	1.29k	}
148
149		/* This is the same as apr_base64_decode() except:
150		* - no \0 is appended
151		* - on EBCDIC machines, the conversion of the output to ebcdic is left out
152		*/
153		APR_DECLARE(int) apr_base64_decode_binary(unsigned char *bufplain,
154		const char *bufcoded)
155	1.29k	{
156	1.29k	int nbytesdecoded;
157	1.29k	register const unsigned char *bufin;
158	1.29k	register unsigned char *bufout;
159	1.29k	register apr_size_t nprbytes;
160
161	1.29k	bufin = (const unsigned char *) bufcoded;
162	7.94k	while (pr2six[*(bufin++)] <= 63);
163	1.29k	nprbytes = (bufin - (const unsigned char *) bufcoded) - 1;
164	1.29k	assert(nprbytes <= APR_BASE64_DECODE_MAX);
165	1.29k	nbytesdecoded = (int)(((nprbytes + 3u) / 4u) * 3u);
166
167	1.29k	bufout = (unsigned char *) bufplain;
168	1.29k	bufin = (const unsigned char *) bufcoded;
169
170	2.78k	while (nprbytes >= 4) {
171	1.48k	*(bufout++) =
172	1.48k	(unsigned char) (pr2six[*bufin] << 2 \| pr2six[bufin[1]] >> 4);
173	1.48k	*(bufout++) =
174	1.48k	(unsigned char) (pr2six[bufin[1]] << 4 \| pr2six[bufin[2]] >> 2);
175	1.48k	*(bufout++) =
176	1.48k	(unsigned char) (pr2six[bufin[2]] << 6 \| pr2six[bufin[3]]);
177	1.48k	bufin += 4;
178	1.48k	nprbytes -= 4;
179	1.48k	}
180
181		/* Note: (nprbytes == 1) would be an error, so just ignore that case */
182	1.29k	if (nprbytes > 1) {
183	228	*(bufout++) =
184	228	(unsigned char) (pr2six[*bufin] << 2 \| pr2six[bufin[1]] >> 4);
185	228	}
186	1.29k	if (nprbytes > 2) {
187	128	*(bufout++) =
188	128	(unsigned char) (pr2six[bufin[1]] << 4 \| pr2six[bufin[2]] >> 2);
189	128	}
190
191	1.29k	return nbytesdecoded - (int)((4u - nprbytes) & 3u);
192	1.29k	}
193
194		APR_DECLARE(char ) apr_pbase64_decode(apr_pool_t p, const char *bufcoded)
195	0	{
196	0	char *decoded;
197
198	0	decoded = (char *) apr_palloc(p, apr_base64_decode_len(bufcoded));
199	0	apr_base64_decode(decoded, bufcoded);
200
201	0	return decoded;
202	0	}
203
204		static const char basis_64[] =
205		"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
206
207		APR_DECLARE(int) apr_base64_encode_len(int len)
208	1.26k	{
209	1.26k	assert(len >= 0 && len <= APR_BASE64_ENCODE_MAX);
210
211	1.26k	return ((len + 2) / 3 * 4) + 1;
212	1.26k	}
213
214		APR_DECLARE(int) apr_base64_encode(char encoded, const char string, int len)
215	1.26k	{
216	1.26k	#if !APR_CHARSET_EBCDIC
217	1.26k	return apr_base64_encode_binary(encoded, (const unsigned char *) string, len);
218		#else /* APR_CHARSET_EBCDIC */
219		int i;
220		char *p;
221
222		assert(len >= 0 && len <= APR_BASE64_ENCODE_MAX);
223
224		p = encoded;
225		for (i = 0; i < len - 2; i += 3) {
226		*p++ = basis_64[(os_toascii[string[i]] >> 2) & 0x3F];
227		*p++ = basis_64[((os_toascii[string[i]] & 0x3) << 4) \|
228		((int) (os_toascii[string[i + 1]] & 0xF0) >> 4)];
229		*p++ = basis_64[((os_toascii[string[i + 1]] & 0xF) << 2) \|
230		((int) (os_toascii[string[i + 2]] & 0xC0) >> 6)];
231		*p++ = basis_64[os_toascii[string[i + 2]] & 0x3F];
232		}
233		if (i < len) {
234		*p++ = basis_64[(os_toascii[string[i]] >> 2) & 0x3F];
235		if (i == (len - 1)) {
236		*p++ = basis_64[((os_toascii[string[i]] & 0x3) << 4)];
237		*p++ = '=';
238		}
239		else {
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		}
244		*p++ = '=';
245		}
246
247		*p++ = '\0';
248		return (unsigned int)(p - encoded);
249		#endif /* APR_CHARSET_EBCDIC */
250	1.26k	}
251
252		/* This is the same as apr_base64_encode() except on EBCDIC machines, where
253		* the conversion of the input to ascii is left out.
254		*/
255		APR_DECLARE(int) apr_base64_encode_binary(char *encoded,
256		const unsigned char *string, int len)
257	1.26k	{
258	1.26k	int i;
259	1.26k	char *p;
260
261	1.26k	assert(len >= 0 && len <= APR_BASE64_ENCODE_MAX);
262
263	1.26k	p = encoded;
264	19.2k	for (i = 0; i < len - 2; i += 3) {
265	18.0k	*p++ = basis_64[(string[i] >> 2) & 0x3F];
266	18.0k	*p++ = basis_64[((string[i] & 0x3) << 4) \|
267	18.0k	((int) (string[i + 1] & 0xF0) >> 4)];
268	18.0k	*p++ = basis_64[((string[i + 1] & 0xF) << 2) \|
269	18.0k	((int) (string[i + 2] & 0xC0) >> 6)];
270	18.0k	*p++ = basis_64[string[i + 2] & 0x3F];
271	18.0k	}
272	1.26k	if (i < len) {
273	608	*p++ = basis_64[(string[i] >> 2) & 0x3F];
274	608	if (i == (len - 1)) {
275	340	*p++ = basis_64[((string[i] & 0x3) << 4)];
276	340	*p++ = '=';
277	340	}
278	268	else {
279	268	*p++ = basis_64[((string[i] & 0x3) << 4) \|
280	268	((int) (string[i + 1] & 0xF0) >> 4)];
281	268	*p++ = basis_64[((string[i + 1] & 0xF) << 2)];
282	268	}
283	608	*p++ = '=';
284	608	}
285
286	1.26k	*p++ = '\0';
287	1.26k	return (unsigned int)(p - encoded);
288	1.26k	}
289
290		APR_DECLARE(char ) apr_pbase64_encode(apr_pool_t p, const char *string)
291	0	{
292	0	char *encoded;
293	0	apr_size_t len = strlen(string);
294
295	0	assert(len <= (apr_size_t)APR_BASE64_ENCODE_MAX);
296	0	encoded = (char *) apr_palloc(p, apr_base64_encode_len((int)len));
297	0	apr_base64_encode(encoded, string, (int)len);
298
299	0	return encoded;
300	0	}