/* base64 url encoding */
-static const int BASE64URL_UINT6[] = {
+#define N6 (unsigned int)-1
+
+static const unsigned int BASE64URL_UINT6[] = {
/* 0 1 2 3 4 5 6 7 8 9 a b c d e f */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0 */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 1 */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, /* 2 */
- 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, /* 3 */
- -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 4 */
- 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, 63, /* 5 */
- -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 6 */
- 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1, /* 7 */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 8 */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 9 */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* a */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* b */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* c */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* d */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* e */
- -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 /* f */
+ N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, /* 0 */
+ N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, /* 1 */
+ N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, 62, N6, N6, /* 2 */
+ 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, N6, N6, N6, N6, N6, N6, /* 3 */
+ N6, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 4 */
+ 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, N6, N6, N6, N6, 63, /* 5 */
+ N6, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 6 */
+ 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, N6, N6, N6, N6, N6, /* 7 */
+ N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, /* 8 */
+ N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, /* 9 */
+ N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, /* a */
+ N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, /* b */
+ N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, /* c */
+ N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, /* d */
+ N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, /* e */
+ N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6, N6 /* f */
};
-static const char BASE64URL_CHARS[] = {
+static const unsigned char BASE64URL_CHARS[] = {
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', /* 0 - 9 */
'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', /* 10 - 19 */
'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', /* 20 - 29 */
'8', '9', '-', '_', ' ', ' ', ' ', ' ', ' ', ' ', /* 60 - 69 */
};
+#define BASE64URL_CHAR(x) BASE64URL_CHARS[ (unsigned int)(x) & 0x3fu ]
+
apr_size_t h2_util_base64url_decode(const char **decoded, const char *encoded,
apr_pool_t *pool)
{
const unsigned char *e = (const unsigned char *)encoded;
const unsigned char *p = e;
unsigned char *d;
- int n;
- apr_size_t len, mlen, remain, i;
+ unsigned int n;
+ long len, mlen, remain, i;
- while (*p && BASE64URL_UINT6[ *p ] != -1) {
+ while (*p && BASE64URL_UINT6[ *p ] != N6) {
++p;
}
- len = p - e;
+ len = (int)(p - e);
mlen = (len/4)*4;
- *decoded = apr_pcalloc(pool, len+1);
+ *decoded = apr_pcalloc(pool, (apr_size_t)len + 1);
i = 0;
d = (unsigned char*)*decoded;
(BASE64URL_UINT6[ e[i+1] ] << 12) +
(BASE64URL_UINT6[ e[i+2] ] << 6) +
(BASE64URL_UINT6[ e[i+3] ]));
- *d++ = n >> 16;
- *d++ = n >> 8 & 0xffu;
- *d++ = n & 0xffu;
+ *d++ = (unsigned char)(n >> 16);
+ *d++ = (unsigned char)(n >> 8 & 0xffu);
+ *d++ = (unsigned char)(n & 0xffu);
}
remain = len - mlen;
switch (remain) {
case 2:
n = ((BASE64URL_UINT6[ e[mlen+0] ] << 18) +
(BASE64URL_UINT6[ e[mlen+1] ] << 12));
- *d++ = n >> 16;
+ *d++ = (unsigned char)(n >> 16);
remain = 1;
break;
case 3:
n = ((BASE64URL_UINT6[ e[mlen+0] ] << 18) +
(BASE64URL_UINT6[ e[mlen+1] ] << 12) +
(BASE64URL_UINT6[ e[mlen+2] ] << 6));
- *d++ = n >> 16;
- *d++ = n >> 8 & 0xffu;
+ *d++ = (unsigned char)(n >> 16);
+ *d++ = (unsigned char)(n >> 8 & 0xffu);
remain = 2;
break;
default: /* do nothing */
break;
}
- return mlen/4*3 + remain;
+ return (apr_size_t)(mlen/4*3 + remain);
}
const char *h2_util_base64url_encode(const char *data,
apr_size_t dlen, apr_pool_t *pool)
{
- long i, len = (int)dlen;
+ int i, len = (int)dlen;
apr_size_t slen = ((dlen+2)/3)*4 + 1; /* 0 terminated */
const unsigned char *udata = (const unsigned char*)data;
- char *enc, *p = apr_pcalloc(pool, slen);
+ unsigned char *enc, *p = apr_pcalloc(pool, slen);
enc = p;
for (i = 0; i < len-2; i+= 3) {
- *p++ = BASE64URL_CHARS[ (udata[i] >> 2) & 0x3fu ];
- *p++ = BASE64URL_CHARS[ ((udata[i] << 4) + (udata[i+1] >> 4)) & 0x3fu ];
- *p++ = BASE64URL_CHARS[ ((udata[i+1] << 2) + (udata[i+2] >> 6)) & 0x3fu ];
- *p++ = BASE64URL_CHARS[ udata[i+2] & 0x3fu ];
+ *p++ = BASE64URL_CHAR( (udata[i] >> 2) );
+ *p++ = BASE64URL_CHAR( (udata[i] << 4) + (udata[i+1] >> 4) );
+ *p++ = BASE64URL_CHAR( (udata[i+1] << 2) + (udata[i+2] >> 6) );
+ *p++ = BASE64URL_CHAR( (udata[i+2]) );
}
if (i < len) {
- *p++ = BASE64URL_CHARS[ (udata[i] >> 2) & 0x3fu ];
+ *p++ = BASE64URL_CHAR( (udata[i] >> 2) );
if (i == (len - 1)) {
- *p++ = BASE64URL_CHARS[ (udata[i] << 4) & 0x3fu ];
+ *p++ = BASE64URL_CHARS[ ((unsigned int)udata[i] << 4) & 0x3fu ];
}
else {
- *p++ = BASE64URL_CHARS[ ((udata[i] << 4) + (udata[i+1] >> 4)) & 0x3fu ];
- *p++ = BASE64URL_CHARS[ (udata[i+1] << 2) & 0x3fu ];
+ *p++ = BASE64URL_CHAR( (udata[i] << 4) + (udata[i+1] >> 4) );
+ *p++ = BASE64URL_CHAR( (udata[i+1] << 2) );
}
}
*p++ = '\0';
- return enc;
+ return (char *)enc;
}
/*******************************************************************************