-/*
- * Copyright (c) 1995 - 1999 Kungliga Tekniska Högskolan
- * (Royal Institute of Technology, Stockholm, Sweden).
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * 3. Neither the name of the Institute nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * 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 COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+/* Base64 encoding/decoding */
+
+#include "curl_setup.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include <stdlib.h>
-#include <string.h>
-#include "base64.h"
+#include "urldata.h" /* for the SessionHandle definition */
+#include "warnless.h"
+#include "curl_base64.h"
+#include "curl_memory.h"
+#include "non-ascii.h"
-/* The last #include file should be: */
-#ifdef MALLOCDEBUG
+/* include memdebug.h last */
#include "memdebug.h"
-#endif
-static char base64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+/* ---- Base64 Encoding/Decoding Table --- */
+static const char base64[]=
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-static int pos(char c)
+/* The Base 64 encoding with an URL and filename safe alphabet, RFC 4648
+ section 5 */
+static const char base64url[]=
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
+
+static size_t decodeQuantum(unsigned char *dest, const char *src)
{
- char *p;
- for(p = base64; *p; p++)
- if(*p == c)
- return p - base64;
- return -1;
+ size_t padding = 0;
+ const char *s, *p;
+ unsigned long i, x = 0;
+
+ for(i = 0, s = src; i < 4; i++, s++) {
+ unsigned long v = 0;
+
+ if(*s == '=') {
+ x = (x << 6);
+ padding++;
+ }
+ else {
+ p = base64;
+
+ while(*p && (*p != *s)) {
+ v++;
+ p++;
+ }
+
+ if(*p == *s)
+ x = (x << 6) + v;
+ else
+ return 0;
+ }
+ }
+
+ if(padding < 1)
+ dest[2] = curlx_ultouc(x & 0xFFUL);
+
+ x >>= 8;
+ if(padding < 2)
+ dest[1] = curlx_ultouc(x & 0xFFUL);
+
+ x >>= 8;
+ dest[0] = curlx_ultouc(x & 0xFFUL);
+
+ return 3 - padding;
}
-#if 1
-int Curl_base64_encode(const void *data, int size, char **str)
+/*
+ * Curl_base64_decode()
+ *
+ * Given a base64 NUL-terminated string at src, decode it and return a
+ * pointer in *outptr to a newly allocated memory area holding decoded
+ * data. Size of decoded data is returned in variable pointed by outlen.
+ *
+ * Returns CURLE_OK on success, otherwise specific error code. Function
+ * output shall not be considered valid unless CURLE_OK is returned.
+ *
+ * When decoded data length is 0, returns NULL in *outptr.
+ *
+ * @unittest: 1302
+ */
+CURLcode Curl_base64_decode(const char *src,
+ unsigned char **outptr, size_t *outlen)
{
- char *s, *p;
- int i;
- int c;
- const unsigned char *q;
-
- p = s = (char*)malloc(size*4/3+4);
- if (p == NULL)
- return -1;
- q = (const unsigned char*)data;
- i=0;
- for(i = 0; i < size;){
- c=q[i++];
- c*=256;
- if(i < size)
- c+=q[i];
- i++;
- c*=256;
- if(i < size)
- c+=q[i];
- i++;
- p[0]=base64[(c&0x00fc0000) >> 18];
- p[1]=base64[(c&0x0003f000) >> 12];
- p[2]=base64[(c&0x00000fc0) >> 6];
- p[3]=base64[(c&0x0000003f) >> 0];
- if(i > size)
- p[3]='=';
- if(i > size+1)
- p[2]='=';
- p+=4;
+ size_t srclen = 0;
+ size_t length = 0;
+ size_t padding = 0;
+ size_t i;
+ size_t numQuantums;
+ size_t rawlen = 0;
+ unsigned char *pos;
+ unsigned char *newstr;
+
+ *outptr = NULL;
+ *outlen = 0;
+ srclen = strlen(src);
+
+ /* Check the length of the input string is valid */
+ if(!srclen || srclen % 4)
+ return CURLE_BAD_CONTENT_ENCODING;
+
+ /* Find the position of any = padding characters */
+ while((src[length] != '=') && src[length])
+ length++;
+
+ /* A maximum of two = padding characters is allowed */
+ if(src[length] == '=') {
+ padding++;
+ if(src[length + 1] == '=')
+ padding++;
+ }
+
+ /* Check the = padding characters weren't part way through the input */
+ if(length + padding != srclen)
+ return CURLE_BAD_CONTENT_ENCODING;
+
+ /* Calculate the number of quantums */
+ numQuantums = srclen / 4;
+
+ /* Calculate the size of the decoded string */
+ rawlen = (numQuantums * 3) - padding;
+
+ /* Allocate our buffer including room for a zero terminator */
+ newstr = malloc(rawlen + 1);
+ if(!newstr)
+ return CURLE_OUT_OF_MEMORY;
+
+ pos = newstr;
+
+ /* Decode the quantums */
+ for(i = 0; i < numQuantums; i++) {
+ size_t result = decodeQuantum(pos, src);
+ if(!result) {
+ Curl_safefree(newstr);
+
+ return CURLE_BAD_CONTENT_ENCODING;
+ }
+
+ pos += result;
+ src += 4;
}
- *p=0;
- *str = s;
- return strlen(s);
+
+ /* Zero terminate */
+ *pos = '\0';
+
+ /* Return the decoded data */
+ *outptr = newstr;
+ *outlen = rawlen;
+
+ return CURLE_OK;
}
-#endif
-int Curl_base64_decode(const char *str, void *data)
+static CURLcode base64_encode(const char *table64,
+ struct SessionHandle *data,
+ const char *inputbuff, size_t insize,
+ char **outptr, size_t *outlen)
{
- const char *p;
- unsigned char *q;
- int c;
- int x;
- int done = 0;
- q=(unsigned char*)data;
- for(p=str; *p && !done; p+=4){
- x = pos(p[0]);
- if(x >= 0)
- c = x;
- else{
- done = 3;
- break;
- }
- c*=64;
-
- x = pos(p[1]);
- if(x >= 0)
- c += x;
- else
- return -1;
- c*=64;
-
- if(p[2] == '=')
- done++;
- else{
- x = pos(p[2]);
- if(x >= 0)
- c += x;
+ CURLcode error;
+ unsigned char ibuf[3];
+ unsigned char obuf[4];
+ int i;
+ int inputparts;
+ char *output;
+ char *base64data;
+ char *convbuf = NULL;
+
+ const char *indata = inputbuff;
+
+ *outptr = NULL;
+ *outlen = 0;
+
+ if(0 == insize)
+ insize = strlen(indata);
+
+ base64data = output = malloc(insize*4/3+4);
+ if(NULL == output)
+ return CURLE_OUT_OF_MEMORY;
+
+ /*
+ * The base64 data needs to be created using the network encoding
+ * not the host encoding. And we can't change the actual input
+ * so we copy it to a buffer, translate it, and use that instead.
+ */
+ error = Curl_convert_clone(data, indata, insize, &convbuf);
+ if(error) {
+ free(output);
+ return error;
+ }
+
+ if(convbuf)
+ indata = (char *)convbuf;
+
+ while(insize > 0) {
+ for(i = inputparts = 0; i < 3; i++) {
+ if(insize > 0) {
+ inputparts++;
+ ibuf[i] = (unsigned char) *indata;
+ indata++;
+ insize--;
+ }
else
- return -1;
+ ibuf[i] = 0;
}
- c*=64;
-
- if(p[3] == '=')
- done++;
- else{
- if(done)
- return -1;
- x = pos(p[3]);
- if(x >= 0)
- c += x;
- else
- return -1;
+
+ obuf[0] = (unsigned char) ((ibuf[0] & 0xFC) >> 2);
+ obuf[1] = (unsigned char) (((ibuf[0] & 0x03) << 4) | \
+ ((ibuf[1] & 0xF0) >> 4));
+ obuf[2] = (unsigned char) (((ibuf[1] & 0x0F) << 2) | \
+ ((ibuf[2] & 0xC0) >> 6));
+ obuf[3] = (unsigned char) (ibuf[2] & 0x3F);
+
+ switch(inputparts) {
+ case 1: /* only one byte read */
+ snprintf(output, 5, "%c%c==",
+ table64[obuf[0]],
+ table64[obuf[1]]);
+ break;
+ case 2: /* two bytes read */
+ snprintf(output, 5, "%c%c%c=",
+ table64[obuf[0]],
+ table64[obuf[1]],
+ table64[obuf[2]]);
+ break;
+ default:
+ snprintf(output, 5, "%c%c%c%c",
+ table64[obuf[0]],
+ table64[obuf[1]],
+ table64[obuf[2]],
+ table64[obuf[3]] );
+ break;
}
- if(done < 3)
- *q++=(c&0x00ff0000)>>16;
-
- if(done < 2)
- *q++=(c&0x0000ff00)>>8;
- if(done < 1)
- *q++=(c&0x000000ff)>>0;
+ output += 4;
}
- return q - (unsigned char*)data;
+ *output = '\0';
+ *outptr = base64data; /* return pointer to new data, allocated memory */
+
+ if(convbuf)
+ free(convbuf);
+
+ *outlen = strlen(base64data); /* return the length of the new data */
+
+ return CURLE_OK;
+}
+
+/*
+ * Curl_base64_encode()
+ *
+ * Given a pointer to an input buffer and an input size, encode it and
+ * return a pointer in *outptr to a newly allocated memory area holding
+ * encoded data. Size of encoded data is returned in variable pointed by
+ * outlen.
+ *
+ * Input length of 0 indicates input buffer holds a NUL-terminated string.
+ *
+ * Returns CURLE_OK on success, otherwise specific error code. Function
+ * output shall not be considered valid unless CURLE_OK is returned.
+ *
+ * When encoded data length is 0, returns NULL in *outptr.
+ *
+ * @unittest: 1302
+ */
+CURLcode Curl_base64_encode(struct SessionHandle *data,
+ const char *inputbuff, size_t insize,
+ char **outptr, size_t *outlen)
+{
+ return base64_encode(base64, data, inputbuff, insize, outptr, outlen);
+}
+
+/*
+ * Curl_base64url_encode()
+ *
+ * Given a pointer to an input buffer and an input size, encode it and
+ * return a pointer in *outptr to a newly allocated memory area holding
+ * encoded data. Size of encoded data is returned in variable pointed by
+ * outlen.
+ *
+ * Input length of 0 indicates input buffer holds a NUL-terminated string.
+ *
+ * Returns CURLE_OK on success, otherwise specific error code. Function
+ * output shall not be considered valid unless CURLE_OK is returned.
+ *
+ * When encoded data length is 0, returns NULL in *outptr.
+ *
+ * @unittest: 1302
+ */
+CURLcode Curl_base64url_encode(struct SessionHandle *data,
+ const char *inputbuff, size_t insize,
+ char **outptr, size_t *outlen)
+{
+ return base64_encode(base64url, data, inputbuff, insize, outptr, outlen);
}
+/* ---- End of Base64 Encoding ---- */
projects / platform / upstream / curl.git / blobdiff