| /* Copyright 2000-2004 The Apache Software Foundation |
| * |
| * Licensed 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 */ |
| |
| /* 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) |
| { |
| int nbytesdecoded; |
| register const unsigned char *bufin; |
| register int nprbytes; |
| |
| bufin = (const unsigned char *) bufcoded; |
| while (pr2six[*(bufin++)] <= 63); |
| |
| nprbytes = (bufin - (const unsigned char *) bufcoded) - 1; |
| nbytesdecoded = ((nprbytes + 3) / 4) * 3; |
| |
| return nbytesdecoded + 1; |
| } |
| |
| 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 int nprbytes; |
| |
| bufin = (const unsigned char *) bufcoded; |
| while (pr2six[*(bufin++)] <= 63); |
| nprbytes = (bufin - (const unsigned char *) bufcoded) - 1; |
| nbytesdecoded = ((nprbytes + 3) / 4) * 3; |
| |
| 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 ingore 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); |
| } |
| if (nprbytes > 3) { |
| *(bufout++) = |
| (unsigned char) (pr2six[bufin[2]] << 6 | pr2six[bufin[3]]); |
| } |
| |
| nbytesdecoded -= (4 - nprbytes) & 3; |
| return nbytesdecoded; |
| } |
| |
| static const char basis_64[] = |
| "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; |
| |
| APU_DECLARE(int) apr_base64_encode_len(int len) |
| { |
| 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; |
| |
| 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 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; |
| |
| 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 p - encoded; |
| } |