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Diffstat (limited to 'util/src/base64.c')
| -rw-r--r-- | util/src/base64.c | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/util/src/base64.c b/util/src/base64.c new file mode 100644 index 0000000..0789169 --- /dev/null +++ b/util/src/base64.c @@ -0,0 +1,284 @@ + +/* + * 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 axis2_sha1.c could + * use it. This meant removing the axis2_palloc()s and adding + * ugly 'len' functions, which is quite a nasty cost. + */ + +#include <axutil_base64.h> + +static const unsigned char pr2six[256] = { +#ifndef __OS400__ + /* 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 /* __OS400__ */ + /* 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 /* AXIS2_CHARSET_EBCDIC */ +}; + +#ifdef __OS400__ + +static unsigned char os_toascii[256] = { + /* 0 1 2 3 4 5 6 7 8 9 A B C D E F */ + 0, 1, 2, 3, 156, 9, 134, 127, 151, 141, 142, 11, 12, 13, 14, 15, + 16, 17, 18, 19, 157, 133, 8, 135, 24, 25, 146, 143, 28, 29, 30, 31, + 128, 129, 130, 131, 132, 10, 23, 27, 136, 137, 138, 139, 140, 5, 6, 7, + 144, 145, 22, 147, 148, 149, 150, 4, 152, 153, 154, 155, 20, 21, 158, 26, + 32, 160, 226, 228, 224, 225, 227, 229, 231, 241, 162, 46, 60, 40, 43, 124, + 38, 233, 234, 235, 232, 237, 238, 239, 236, 223, 33, 36, 42, 41, 59, 172, + 45, 47, 194, 196, 192, 193, 195, 197, 199, 209, 166, 44, 37, 95, 62, 63, + 248, 201, 202, 203, 200, 205, 206, 207, 204, 96, 58, 35, 64, 39, 61, 34, + 216, 97, 98, 99, 100, 101, 102, 103, 104, 105, 171, 187, 240, 253, 254, 177, + 176, 106, 107, 108, 109, 110, 111, 112, 113, 114, 170, 186, 230, 184, 198, + 164, + 181, 126, 115, 116, 117, 118, 119, 120, 121, 122, 161, 191, 208, 221, 222, + 174, + 94, 163, 165, 183, 169, 167, 182, 188, 189, 190, 91, 93, 175, 168, 180, 215, + 123, 65, 66, 67, 68, 69, 70, 71, 72, 73, 173, 244, 246, 242, 243, 245, + 125, 74, 75, 76, 77, 78, 79, 80, 81, 82, 185, 251, 252, 249, 250, 255, + 92, 247, 83, 84, 85, 86, 87, 88, 89, 90, 178, 212, 214, 210, 211, 213, + 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 179, 219, 220, 217, 218, 159 +}; + +#endif /* __OS400__ */ + +AXIS2_EXTERN int AXIS2_CALL +axutil_base64_decode_len( + const char *bufcoded) +{ + int nbytesdecoded; + register const unsigned char *bufin; + register int nprbytes; + + if(!bufcoded) + { + return -1; + } + + bufin = (const unsigned char *)bufcoded; + while(pr2six[*(bufin++)] <= 63) + ; + + nprbytes = (int)(bufin - (const unsigned char *)bufcoded) - 1; + /* We are sure that the difference lies within the int range */ + + nbytesdecoded = ((nprbytes >> 2) * 3); + + if(nprbytes & 0x03) + nbytesdecoded += (nprbytes & 0x03) - 1; + + return nbytesdecoded; + +} + +AXIS2_EXTERN int AXIS2_CALL +axutil_base64_decode( + char *bufplain, + const char *bufcoded) +{ + int len; + len = axutil_base64_decode_binary((unsigned char *)bufplain, bufcoded); + bufplain[len] = '\0'; + return len; +} + +/* This is the same as axutil_base64_decode() except on EBCDIC machines, where + * the conversion of the output to ebcdic is left out. + */ + +AXIS2_EXTERN int AXIS2_CALL +axutil_base64_decode_binary( + unsigned char *bufplain, + const char *bufcoded) +{ + int nbytesdecoded; + register const unsigned char *bufin; + register unsigned char *bufout; + register int nprbytes; + + if(!bufcoded) + { + return -1; + } + + bufin = (const unsigned char *)bufcoded; + while(pr2six[*(bufin++)] <= 63) + ; + nprbytes = (int)(bufin - (const unsigned char *)bufcoded) - 1; + /* We are sure that the difference lies within the int range */ + 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+/"; + +AXIS2_EXTERN int AXIS2_CALL +axutil_base64_encode_len( + int len) +{ + return ((len + 2) / 3 * 4) + 1; +} + +AXIS2_EXTERN int AXIS2_CALL +axutil_base64_encode( + char *encoded, + const char *string, + int len) +{ +#ifndef __OS400__ + return axutil_base64_encode_binary(encoded, (const unsigned char *)string, len); +#else /* __OS400__ */ + 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 /* __OS400__ */ +} + +/* This is the same as axutil_base64_encode() except on EBCDIC machines, where + * the conversion of the input to ascii is left out. + */ +AXIS2_EXTERN int AXIS2_CALL +axutil_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 (int)(p - encoded); + /* We are sure that the difference lies within the int range */ +} |