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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:12:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 09:12:13 +0000 |
commit | 2e88f64bb100419daef10f84e49d7aed2bfff0d2 (patch) | |
tree | 5fd273cc604fd00efd630eb387a6f79ce102f4e3 /encoding/apr_base64.c | |
parent | Initial commit. (diff) | |
download | apr-util-upstream.tar.xz apr-util-upstream.zip |
Adding upstream version 1.6.3.upstream/1.6.3upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | encoding/apr_base64.c | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/encoding/apr_base64.c b/encoding/apr_base64.c new file mode 100644 index 0000000..ac9f281 --- /dev/null +++ b/encoding/apr_base64.c @@ -0,0 +1,277 @@ +/* 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]; + +APU_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*/ + +APU_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); +} + +APU_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 on EBCDIC machines, where + * the conversion of the output to ebcdic is left out. + */ +APU_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); +} + +static const char basis_64[] = + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + +APU_DECLARE(int) apr_base64_encode_len(int len) +{ + assert(len >= 0 && len <= APR_BASE64_ENCODE_MAX); + + return ((len + 2) / 3 * 4) + 1; +} + +APU_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. + */ +APU_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); +} |