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feat(deps): Skips whitespace for base64 decoding

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Julius Pfrommer 2025-03-30 20:47:35 +02:00 committed by Julius Pfrommer
parent 657546711c
commit d0e08b4bb0
1 changed files with 15 additions and 8 deletions
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23
deps/base64.c vendored
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@ -61,9 +61,9 @@ UA_base64_buf(const unsigned char *src, size_t len, unsigned char *out) {
} }
static unsigned char dtable[128] = { static unsigned char dtable[128] = {
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x7f, 0x7f, 0x80, 0x80, 0x7f, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x7f, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 62 , 0x80, 62 , 0x80, 63 ,
0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 62 , 0x80, 62 , 0x80, 63 ,
52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 0x80, 0x80, 0x80, 0 , 0x80, 0x80, 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 0x80, 0x80, 0x80, 0 , 0x80, 0x80,
0x80, 0 , 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 0x80, 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 , 0x80, 0x80, 0x80, 0x80, 63 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 0x80, 0x80, 0x80, 0x80, 63 ,
@ -92,9 +92,12 @@ UA_unbase64(const unsigned char *src, size_t len, size_t *out_len) {
unsigned char *pos = out; unsigned char *pos = out;
for(size_t i = 0; i < len; i++) { for(size_t i = 0; i < len; i++) {
/* Process character */ /* Process character */
unsigned char tmp = dtable[src[i] & 0x07f]; unsigned char tmp = dtable[src[i] & 0x7f];
if(tmp == 0x80) if(tmp == 0x80)
goto error; /* Invalid input */ goto error;
if(tmp == 0x7f)
continue; /* Whitespace is ignored to accomodate RFC 2045, used in
* XML for xs:base64Binary. */
block[count++] = tmp; block[count++] = tmp;
/* Allow padding in the middle. /* Allow padding in the middle.
@ -105,10 +108,10 @@ UA_unbase64(const unsigned char *src, size_t len, size_t *out_len) {
/* Premature end of input. Fill up the block with padding. */ /* Premature end of input. Fill up the block with padding. */
if(i + 1 == len) { if(i + 1 == len) {
len = (len + 3) & ~0x03; /* Next multiple of four */ len = (len + 3) & ~0x03; /* Next multiple of four */
for(i++; i < len; i++) { for(i++; i < len; i++)
block[count++] = 0;
pad++; pad++;
} for(; count < 4; count++)
block[count] = 0;
} }
/* Write three output characters for four characters of input */ /* Write three output characters for four characters of input */
@ -125,7 +128,11 @@ UA_unbase64(const unsigned char *src, size_t len, size_t *out_len) {
} }
*out_len = (size_t)(pos - out); *out_len = (size_t)(pos - out);
return out; if(*out_len == 0) {
UA_free(out);
return (unsigned char*)UA_EMPTY_ARRAY_SENTINEL;
}
return out;
error: error:
UA_free(out); UA_free(out);