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Core: added ngx_encode_base64url().

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This commit is contained in:
Maxim Dounin 2014-02-04 04:59:21 +04:00
parent 2e57e0609b
commit 7ac48da41d
2 changed files with 38 additions and 12 deletions
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49
src/core/ngx_string.c
View File

@ -11,6 +11,8 @@
static u_char *ngx_sprintf_num(u_char *buf, u_char *last, uint64_t ui64,
u_char zero, ngx_uint_t hexadecimal, ngx_uint_t width);
static void ngx_encode_base64_internal(ngx_str_t *dst, ngx_str_t *src,
const u_char *basis, ngx_uint_t padding);
static ngx_int_t ngx_decode_base64_internal(ngx_str_t *dst, ngx_str_t *src,
const u_char *basis);
@ -1100,38 +1102,61 @@ ngx_hex_dump(u_char *dst, u_char *src, size_t len)
void
ngx_encode_base64(ngx_str_t *dst, ngx_str_t *src)
{
u_char *d, *s;
size_t len;
static u_char basis64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
ngx_encode_base64_internal(dst, src, basis64, 1);
}
void
ngx_encode_base64url(ngx_str_t *dst, ngx_str_t *src)
{
static u_char basis64[] =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
ngx_encode_base64_internal(dst, src, basis64, 0);
}
static void
ngx_encode_base64_internal(ngx_str_t *dst, ngx_str_t *src, const u_char *basis,
ngx_uint_t padding)
{
u_char *d, *s;
size_t len;
len = src->len;
s = src->data;
d = dst->data;
while (len > 2) {
*d++ = basis64[(s[0] >> 2) & 0x3f];
*d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
*d++ = basis64[((s[1] & 0x0f) << 2) | (s[2] >> 6)];
*d++ = basis64[s[2] & 0x3f];
*d++ = basis[(s[0] >> 2) & 0x3f];
*d++ = basis[((s[0] & 3) << 4) | (s[1] >> 4)];
*d++ = basis[((s[1] & 0x0f) << 2) | (s[2] >> 6)];
*d++ = basis[s[2] & 0x3f];
s += 3;
len -= 3;
}
if (len) {
*d++ = basis64[(s[0] >> 2) & 0x3f];
*d++ = basis[(s[0] >> 2) & 0x3f];
if (len == 1) {
*d++ = basis64[(s[0] & 3) << 4];
*d++ = '=';
*d++ = basis[(s[0] & 3) << 4];
if (padding) {
*d++ = '=';
}
} else {
*d++ = basis64[((s[0] & 3) << 4) | (s[1] >> 4)];
*d++ = basis64[(s[1] & 0x0f) << 2];
*d++ = basis[((s[0] & 3) << 4) | (s[1] >> 4)];
*d++ = basis[(s[1] & 0x0f) << 2];
}
*d++ = '=';
if (padding) {
*d++ = '=';
}
}
dst->len = d - dst->data;

1
src/core/ngx_string.h
View File

@ -183,6 +183,7 @@ u_char *ngx_hex_dump(u_char *dst, u_char *src, size_t len);
#define ngx_base64_decoded_length(len) (((len + 3) / 4) * 3)
void ngx_encode_base64(ngx_str_t *dst, ngx_str_t *src);
void ngx_encode_base64url(ngx_str_t *dst, ngx_str_t *src);
ngx_int_t ngx_decode_base64(ngx_str_t *dst, ngx_str_t *src);
ngx_int_t ngx_decode_base64url(ngx_str_t *dst, ngx_str_t *src);