/* Copyright (c) Tom Kistner <tom@duncanthrax.net> 2004, 2015 */
/* License: GPL */
-/* Copyright (c) University of Cambridge 1995 - 2015 */
+/* Copyright (c) University of Cambridge 1995 - 2016 */
/* See the file NOTICE for conditions of use and distribution. */
#endif /*WITH_CONTENT_SCAN*/
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/*************************************************
Arguments:
code points to the coded string, zero-terminated
ptr where to put the pointer to the result, which is in
- dynamic store, and zero-terminated
+ allocated store, and zero-terminated
Returns: the number of bytes in the result,
or -1 if the input was malformed
+Whitespace in the input is ignored.
A zero is added on to the end to make it easy in cases where the result is to
be interpreted as text. This is not included in the count. */
while ((x = *code++) != 0)
{
+ if (isspace(x)) continue;
+ /* debug_printf("b64d: '%c'\n", x); */
+
if (x > 127 || (x = dec64table[x]) == 255) return -1;
- if ((y = *code++) == 0 || (y = dec64table[y]) == 255)
+
+ while (isspace(y = *code++)) ;
+ /* debug_printf("b64d: '%c'\n", y); */
+ if (y == 0 || (y = dec64table[y]) == 255)
return -1;
*result++ = (x << 2) | (y >> 4);
+ /* debug_printf("b64d: -> %02x\n", result[-1]); */
- if ((x = *code++) == '=')
+ while (isspace(x = *code++)) ;
+ /* debug_printf("b64d: '%c'\n", x); */
+ if (x == '=') /* endmarker, but there should be another */
{
- if (*code++ != '=' || *code != 0) return -1;
+ while (isspace(x = *code++)) ;
+ /* debug_printf("b64d: '%c'\n", x); */
+ if (x != '=') return -1;
+ while (isspace(y = *code++)) ;
+ if (y != 0) return -1;
+ /* debug_printf("b64d: DONE\n"); */
+ break;
}
else
{
if (x > 127 || (x = dec64table[x]) == 255) return -1;
*result++ = (y << 4) | (x >> 2);
- if ((y = (*code++)) == '=')
+ /* debug_printf("b64d: -> %02x\n", result[-1]); */
+
+ while (isspace(y = *code++)) ;
+ /* debug_printf("b64d: '%c'\n", y); */
+ if (y == '=')
{
- if (*code != 0) return -1;
+ while (isspace(y = *code++)) ;
+ if (y != 0) return -1;
+ /* debug_printf("b64d: DONE\n"); */
+ break;
}
else
{
if (y > 127 || (y = dec64table[y]) == 255) return -1;
*result++ = (x << 6) | y;
+ /* debug_printf("b64d: -> %02x\n", result[-1]); */
}
}
}
}
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* Encode byte-string in base 64 *
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