69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
|
|
/*
|
|
* Copyright (C) NGINX, Inc.
|
|
*/
|
|
|
|
#include <nxt_main.h>
|
|
#include <nxt_websocket.h>
|
|
#include <nxt_sha1.h>
|
|
|
|
|
|
static void
|
|
nxt_websocket_base64_encode(u_char *d, const uint8_t *s, size_t len)
|
|
{
|
|
u_char c0, c1, c2;
|
|
static u_char basis[] =
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
|
while (len > 2) {
|
|
c0 = s[0];
|
|
c1 = s[1];
|
|
c2 = s[2];
|
|
|
|
*d++ = basis[c0 >> 2];
|
|
*d++ = basis[((c0 & 0x03) << 4) | (c1 >> 4)];
|
|
*d++ = basis[((c1 & 0x0f) << 2) | (c2 >> 6)];
|
|
*d++ = basis[c2 & 0x3f];
|
|
|
|
s += 3;
|
|
len -= 3;
|
|
}
|
|
|
|
if (len > 0) {
|
|
c0 = s[0];
|
|
*d++ = basis[c0 >> 2];
|
|
|
|
if (len == 1) {
|
|
*d++ = basis[(c0 & 0x03) << 4];
|
|
*d++ = '=';
|
|
*d++ = '=';
|
|
|
|
} else {
|
|
c1 = s[1];
|
|
|
|
*d++ = basis[((c0 & 0x03) << 4) | (c1 >> 4)];
|
|
*d++ = basis[(c1 & 0x0f) << 2];
|
|
|
|
*d++ = '=';
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void
|
|
nxt_websocket_accept(u_char *accept, const void *key)
|
|
{
|
|
u_char bin_accept[20];
|
|
nxt_sha1_t ctx;
|
|
static const char accept_guid[] = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
|
|
|
|
nxt_sha1_init(&ctx);
|
|
nxt_sha1_update(&ctx, key, 24);
|
|
nxt_sha1_update(&ctx, accept_guid, nxt_length(accept_guid));
|
|
nxt_sha1_final(bin_accept, &ctx);
|
|
|
|
nxt_websocket_base64_encode(accept, bin_accept, sizeof(bin_accept));
|
|
}
|
|
|
|
|