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Diffstat (limited to 'Build/source/libs/curl/lib/base64.c')
-rw-r--r-- | Build/source/libs/curl/lib/base64.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/Build/source/libs/curl/lib/base64.c b/Build/source/libs/curl/lib/base64.c new file mode 100644 index 00000000000..07685f2df8b --- /dev/null +++ b/Build/source/libs/curl/lib/base64.c @@ -0,0 +1,270 @@ +/***************************************************************************** + * _ _ ____ _ + * Project ___| | | | _ \| | + * / __| | | | |_) | | + * | (__| |_| | _ <| |___ + * \___|\___/|_| \_\_____| + * + * Copyright (C) 2001, Andrew Francis and Daniel Stenberg + * + * In order to be useful for every potential user, curl and libcurl are + * dual-licensed under the MPL and the MIT/X-derivate licenses. + * + * You may opt to use, copy, modify, merge, publish, distribute and/or sell + * copies of the Software, and permit persons to whom the Software is + * furnished to do so, under the terms of the MPL or the MIT/X-derivate + * licenses. You may pick one of these licenses. + * + * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY + * KIND, either express or implied. + * + * $Id: base64.c,v 1.12 2001/10/11 09:32:19 bumblebury Exp $ + *****************************************************************************/ + +/* Base64 encoding/decoding + * + * Test harnesses down the bottom - compile with -DTEST_ENCODE for + * a program that will read in raw data from stdin and write out + * a base64-encoded version to stdout, and the length returned by the + * encoding function to stderr. Compile with -DTEST_DECODE for a program that + * will go the other way. + * + * This code will break if int is smaller than 32 bits + */ + +#include "setup.h" + +#include <stdlib.h> +#include <string.h> + +#define _MPRINTF_REPLACE /* use our functions only */ +#include <curl/mprintf.h> + +#include "base64.h" + +#ifdef MALLOCDEBUG +#include "memdebug.h" +#endif + +static void decodeQuantum(unsigned char *dest, char *src) +{ + unsigned int x = 0; + int i; + for(i = 0; i < 4; i++) { + if(src[i] >= 'A' && src[i] <= 'Z') + x = (x << 6) + (unsigned int)(src[i] - 'A' + 0); + else if(src[i] >= 'a' && src[i] <= 'z') + x = (x << 6) + (unsigned int)(src[i] - 'a' + 26); + else if(src[i] >= '0' && src[i] <= '9') + x = (x << 6) + (unsigned int)(src[i] - '0' + 52); + else if(src[i] == '+') + x = (x << 6) + 62; + else if(src[i] == '/') + x = (x << 6) + 63; + } + + dest[2] = (unsigned char)(x & 255); x >>= 8; + dest[1] = (unsigned char)(x & 255); x >>= 8; + dest[0] = (unsigned char)(x & 255); x >>= 8; +} + +/* base64Decode + * Given a base64 string at src, decode it into the memory pointed + * to by dest. If rawLength points to a valid address (ie not NULL), + * store the length of the decoded data to it. + */ +static void base64Decode(unsigned char *dest, char *src, int *rawLength) +{ + int length = 0; + int equalsTerm = 0; + int i; + unsigned char lastQuantum[3]; + + while((src[length] != '=') && src[length]) + length++; + while(src[length+equalsTerm] == '=') + equalsTerm++; + + if(rawLength) + *rawLength = (length * 3 / 4) - equalsTerm; + + for(i = 0; i < length/4 - 1; i++) { + decodeQuantum(dest, src); + dest += 3; src += 4; + } + + decodeQuantum(lastQuantum, src); + for(i = 0; i < 3 - equalsTerm; i++) dest[i] = lastQuantum[i]; + +} + +/* ---- Base64 Encoding --- */ +static char table64[]= + "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"; + +/* + * Curl_base64_encode() + * + * Returns the length of the newly created base64 string. The third argument + * is a pointer to an allocated area holding the base64 data. If something + * went wrong, -1 is returned. + * + */ +int Curl_base64_encode(const void *inp, int insize, char **outptr) +{ + unsigned char ibuf[3]; + unsigned char obuf[4]; + int i; + int inputparts; + char *output; + char *base64data; + + char *indata = (char *)inp; + + if(0 == insize) + insize = strlen(indata); + + base64data = output = (char*)malloc(insize*4/3+4); + if(NULL == output) + return -1; + + while(insize > 0) { + for (i = inputparts = 0; i < 3; i++) { + if(*indata) { + inputparts++; + ibuf[i] = *indata; + indata++; + insize--; + } + else + ibuf[i] = 0; + } + + obuf [0] = (ibuf [0] & 0xFC) >> 2; + obuf [1] = ((ibuf [0] & 0x03) << 4) | ((ibuf [1] & 0xF0) >> 4); + obuf [2] = ((ibuf [1] & 0x0F) << 2) | ((ibuf [2] & 0xC0) >> 6); + obuf [3] = ibuf [2] & 0x3F; + + switch(inputparts) { + case 1: /* only one byte read */ + sprintf(output, "%c%c==", + table64[obuf[0]], + table64[obuf[1]]); + break; + case 2: /* two bytes read */ + sprintf(output, "%c%c%c=", + table64[obuf[0]], + table64[obuf[1]], + table64[obuf[2]]); + break; + default: + sprintf(output, "%c%c%c%c", + table64[obuf[0]], + table64[obuf[1]], + table64[obuf[2]], + table64[obuf[3]] ); + break; + } + output += 4; + } + *output=0; + *outptr = base64data; /* make it return the actual data memory */ + + return strlen(base64data); /* return the length of the new data */ +} +/* ---- End of Base64 Encoding ---- */ + +int Curl_base64_decode(const char *str, void *data) +{ + int ret; + + base64Decode((unsigned char *)data, (char *)str, &ret); + return ret; +} + +/************* TEST HARNESS STUFF ****************/ + + +#ifdef TEST_ENCODE +/* encoding test harness. Read in standard input and write out the length + * returned by Curl_base64_encode, followed by the base64'd data itself + */ +#include <stdio.h> + +#define TEST_NEED_SUCK +void *suck(int *); + +int main(int argc, char **argv, char **envp) { + char *base64; + int base64Len; + unsigned char *data; + int dataLen; + + data = (unsigned char *)suck(&dataLen); + base64Len = Curl_base64_encode(data, dataLen, &base64); + + fprintf(stderr, "%d\n", base64Len); + fprintf(stdout, "%s", base64); + + free(base64); free(data); + return 0; +} +#endif + +#ifdef TEST_DECODE +/* decoding test harness. Read in a base64 string from stdin and write out the + * length returned by Curl_base64_decode, followed by the decoded data itself + */ +#include <stdio.h> + +#define TEST_NEED_SUCK +void *suck(int *); + +int main(int argc, char **argv, char **envp) { + char *base64; + int base64Len; + unsigned char *data; + int dataLen; + + base64 = (char *)suck(&base64Len); + data = (unsigned char *)malloc(base64Len * 3/4 + 8); + dataLen = Curl_base64_decode(base64, data); + + fprintf(stderr, "%d\n", dataLen); + fwrite(data,1,dataLen,stdout); + + + free(base64); free(data); + return 0; +} +#endif + +#ifdef TEST_NEED_SUCK +/* this function 'sucks' in as much as possible from stdin */ +void *suck(int *lenptr) { + int cursize = 8192; + unsigned char *buf = NULL; + int lastread; + int len = 0; + + do { + cursize *= 2; + buf = (unsigned char *)realloc(buf, cursize); + memset(buf + len, 0, cursize - len); + lastread = fread(buf + len, 1, cursize - len, stdin); + len += lastread; + } while(!feof(stdin)); + + lenptr[0] = len; + return (void *)buf; +} +#endif + + +/* + * local variables: + * eval: (load-file "../curl-mode.el") + * end: + * vim600: fdm=marker + * vim: et sw=2 ts=2 sts=2 tw=78 + */ |