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usbloadergx/source/network/https.c
wiidev b3e4b2401d Update wolfSSL and networking code
2020-07-06 17:06:35 +01:00

532 lines
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/*
Code by blackb0x @ GBAtemp.net
This allows the Wii to download from servers that use SNI.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <network.h>
#include <ogc/lwp_watchdog.h>
#include <unistd.h>
#include "https.h"
#include "gecko.h"
#include "../svnrev.h"
#include "picohttpparser.h"
#include "prompts/ProgressWindow.h"
u8 loop;
WOLFSSL_SESSION *session;
int https_write(HTTP_INFO *httpinfo, char *buffer, int len)
{
int ret, slen = 0;
while (1)
{
if (httpinfo->use_https)
ret = wolfSSL_write(httpinfo->ssl, &buffer[slen], len - slen);
else
ret = net_write(httpinfo->sock, &buffer[slen], len - slen);
if (ret == 0)
continue;
else if (ret <= 0)
return ret; // Timeout would return -1
slen += ret;
if (slen >= len)
break;
}
return slen;
}
int https_read(HTTP_INFO *httpinfo, char *buffer, int len)
{
struct pollsd fds[1];
fds[0].socket = httpinfo->sock;
fds[0].events = POLLIN;
net_fcntl(httpinfo->sock, F_SETFL, 4);
switch (net_poll(fds, 1, READ_WRITE_TIMEOUT))
{
case -1:
#ifdef DEBUG_NETWORK
gprintf("net_poll error\n");
#endif
return -1;
case 0:
#ifdef DEBUG_NETWORK
gprintf("The connection timed out\n");
#endif
return -ETIMEDOUT;
default:
net_fcntl(httpinfo->sock, F_SETFL, 0);
if (len > 8192)
len = 8192; // 16KB is the max on a Wii, but 8KB is safe
if (httpinfo->use_https)
return wolfSSL_read(httpinfo->ssl, buffer, len);
return net_read(httpinfo->sock, buffer, len);
}
}
void https_close(HTTP_INFO *httpinfo)
{
if (httpinfo->use_https)
{
if (wolfSSL_shutdown(httpinfo->ssl) == SSL_SHUTDOWN_NOT_DONE)
wolfSSL_shutdown(httpinfo->ssl);
wolfSSL_free(httpinfo->ssl);
wolfSSL_CTX_free(httpinfo->ctx);
}
net_close(httpinfo->sock);
#ifdef DEBUG_NETWORK
gprintf("Closed socket and cleaned up\n");
#endif
}
u8 get_header_value(struct phr_header *headers, size_t num_headers, char *dst, char *header)
{
for (size_t i = 0; i != num_headers; ++i)
{
if (strncasecmp(header, headers[i].name, headers[i].name_len) == 0)
{
strlcpy(dst, headers[i].value, headers[i].value_len + 1);
return 1;
}
}
return 0;
}
u64 get_header_value_int(struct phr_header *headers, size_t num_headers, char *header)
{
char header_value[30] = {};
if (!get_header_value(headers, num_headers, header_value, header))
return 0;
return strtoull(header_value, NULL, 0);
}
u8 is_chunked(struct phr_header *headers, size_t num_headers)
{
char encoding[10] = {};
if (!get_header_value(headers, num_headers, encoding, "transfer-encoding"))
return 0;
return (strcasecmp(encoding, "chunked") == 0) ? 1 : 0;
}
u8 read_chunked(HTTP_INFO *httpinfo, struct download *buffer, size_t start_pos)
{
struct phr_chunked_decoder decoder = {};
size_t capacity = 4096, rsize;
ssize_t rret, pret;
decoder.consume_trailer = 1;
#ifdef DEBUG_NETWORK
gprintf("Data is chunked\n");
#endif
do
{
if (buffer->show_progress)
{
if (ProgressCanceled())
return 0;
ShowProgress(start_pos, capacity); // Unknown size for chunked transfers
}
if (start_pos == capacity)
{
#ifdef DEBUG_NETWORK
gprintf("Increased buffer size\n");
#endif
capacity *= 2;
buffer->data = realloc(buffer->data, capacity);
}
while ((rret = https_read(httpinfo, &buffer->data[start_pos], capacity - start_pos)) == -1 && errno == EINTR)
;
if (rret <= 0)
{
#ifdef DEBUG_NETWORK
gprintf("IO error\n");
#endif
return 0;
}
rsize = rret;
pret = phr_decode_chunked(&decoder, &buffer->data[start_pos], &rsize);
if (pret == -1)
{
#ifdef DEBUG_NETWORK
gprintf("Parse error\n");
#endif
return 0;
}
start_pos += rsize;
} while (pret == -2);
buffer->size = start_pos;
buffer->data = realloc(buffer->data, buffer->size);
return 1;
}
u8 read_all(HTTP_INFO *httpinfo, struct download *buffer, size_t start_pos)
{
size_t capacity = 4096;
ssize_t ret;
#ifdef DEBUG_NETWORK
gprintf("Data is not chunked\n");
#endif
while (1)
{
if (buffer->show_progress)
{
if (ProgressCanceled())
return 0;
ShowProgress(start_pos, buffer->content_length);
}
if (start_pos == capacity)
{
#ifdef DEBUG_NETWORK
gprintf("Increased buffer size\n");
#endif
capacity *= 2;
buffer->data = realloc(buffer->data, capacity);
}
while ((ret = https_read(httpinfo, &buffer->data[start_pos], capacity - start_pos)) == -1 && errno == EINTR)
;
if (ret == 0)
break;
if (ret < 0)
return 0;
start_pos += ret;
};
buffer->size = start_pos;
buffer->data = realloc(buffer->data, buffer->size);
return 1;
}
int connect(char *host, u16 port)
{
struct sockaddr_in sin;
s32 sock, ret;
u64 t;
u32 ipaddress = getipbynamecached(host);
if (ipaddress == 0)
return -1;
sock = net_socket(AF_INET, SOCK_STREAM, IPPROTO_IP);
if (sock < 0)
return sock;
memset(&sin, 0, sizeof(struct sockaddr_in));
sin.sin_family = AF_INET;
sin.sin_port = htons(port);
sin.sin_addr.s_addr = ipaddress;
#ifdef DEBUG_NETWORK
gprintf("Connecting to %s (%s)\n", host, inet_ntoa(sin.sin_addr));
#endif
net_fcntl(sock, F_SETFL, 4);
t = gettime();
while (1)
{
if (ticks_to_millisecs(diff_ticks(t, gettime())) > TCP_CONNECT_TIMEOUT)
{
#ifdef DEBUG_NETWORK
gprintf("The connection timed out\n");
#endif
net_close(sock);
return -ETIMEDOUT;
}
ret = net_connect(sock, (struct sockaddr *)&sin, sizeof(sin));
if (ret < 0)
{
if (ret == -EISCONN)
break;
if (ret == -EINPROGRESS || ret == -EALREADY)
{
usleep(20 * 1000);
continue;
}
net_close(sock);
return ret;
}
break;
}
net_fcntl(sock, F_SETFL, 0);
return sock;
}
void downloadfile(const char *url, struct download *buffer)
{
HTTP_INFO httpinfo;
memset(&httpinfo, 0, sizeof(HTTP_INFO));
// Always reset the size due to the image downloader looping
buffer->size = 0;
// Check if we're using HTTPS and set the path
char *path;
if (strncmp(url, "https://", 8) == 0)
{
httpinfo.use_https = 1;
path = strchr(url + 8, '/');
}
else if (strncmp(url, "http://", 7) == 0)
{
httpinfo.use_https = 0;
path = strchr(url + 7, '/');
}
else
return; // Prevents uninitialized warning
if (path == NULL)
return;
// Get the host
int domainlength = path - url - 7 - httpinfo.use_https;
char host[domainlength + 1];
strlcpy(host, url + 7 + httpinfo.use_https, domainlength + 1);
// Start connecting
if ((httpinfo.sock = connect(host, httpinfo.use_https ? 443 : 80)) < 0)
{
#ifdef DEBUG_NETWORK
gprintf("Failed to connect to %s\n", host);
#endif
return;
}
#ifdef DEBUG_NETWORK
else
gprintf("Connected\n");
#endif
if (httpinfo.use_https)
{
// Create a new SSL context
// wolfSSLv23_client_method() works, but resume would require further changes
if ((httpinfo.ctx = wolfSSL_CTX_new(wolfTLSv1_2_client_method())) == NULL)
{
#ifdef DEBUG_NETWORK
gprintf("Failed to create WOLFSSL_CTX\n");
#endif
https_close(&httpinfo);
return;
}
// Don't verify certificates
wolfSSL_CTX_set_verify(httpinfo.ctx, WOLFSSL_VERIFY_NONE, 0);
// Enable SNI
if (wolfSSL_CTX_UseSNI(httpinfo.ctx, 0, host, strlen(host)) != WOLFSSL_SUCCESS)
{
#ifdef DEBUG_NETWORK
gprintf("Failed to set SNI\n");
#endif
https_close(&httpinfo);
return;
}
// Create a new wolfSSL session
if ((httpinfo.ssl = wolfSSL_new(httpinfo.ctx)) == NULL)
{
#ifdef DEBUG_NETWORK
gprintf("SSL session creation failed\n");
#endif
https_close(&httpinfo);
return;
}
// Set the file descriptor
if (wolfSSL_set_fd(httpinfo.ssl, httpinfo.sock) != SSL_SUCCESS)
{
#ifdef DEBUG_NETWORK
gprintf("Failed to set SSL file descriptor\n");
#endif
https_close(&httpinfo);
return;
}
// Attempt to resume the session
if (session != NULL && wolfSSL_set_session(httpinfo.ssl, session) != SSL_SUCCESS)
{
#ifdef DEBUG_NETWORK
gprintf("Failed to set session (session timed out?)\n");
#endif
session = NULL;
}
// Initiate a handshake
if (wolfSSL_connect(httpinfo.ssl) != SSL_SUCCESS)
{
#ifdef DEBUG_NETWORK
gprintf("SSL handshake failed\n");
#endif
https_close(&httpinfo);
return;
}
// Check if we resumed successfully
if (session != NULL && !wolfSSL_session_reused(httpinfo.ssl))
{
#ifdef DEBUG_NETWORK
gprintf("Failed to resume session\n");
#endif
session = NULL;
}
// Cipher info
#ifdef DEBUG_NETWORK
/*char ciphers[4096];
wolfSSL_get_ciphers(ciphers, (int)sizeof(ciphers));
gprintf("All supported ciphers: %s\n", ciphers);*/
WOLFSSL_CIPHER *cipher = wolfSSL_get_current_cipher(httpinfo.ssl);
gprintf("Using: %s - %s\n", wolfSSL_get_version(httpinfo.ssl), wolfSSL_CIPHER_get_name(cipher));
#endif
}
// Send our request
char request[2300];
char isgecko[36] = "Cookie: challenge=BitMitigate.com\r\n";
char method[5] = "HEAD"; // The only way to get the GameTDB timestamp
int ret, len;
if (strcmp(host, "www.geckocodes.org") != 0)
memset(isgecko, 0, sizeof(isgecko)); // Not geckocodes, so don't set a cookie
if (!buffer->gametdbcheck)
strcpy(method, "GET");
len = snprintf(request, 2300,
"%s %s HTTP/1.1\r\n"
"Host: %s\r\n"
"User-Agent: USBLoaderGX/%s\r\n"
"Connection: close\r\n"
"%s"
"Pragma: no-cache\r\n"
"Cache-Control: no-cache\r\n\r\n",
method, path, host, GetRev(), isgecko);
if ((ret = https_write(&httpinfo, request, len)) != len)
{
#ifdef DEBUG_NETWORK
gprintf("https_write error: %i\n", ret);
#endif
https_close(&httpinfo);
return;
}
// Check if we want a response
if (buffer->skip_response)
{
#ifdef DEBUG_NETWORK
gprintf("Sent request to %s and skipping response\n", host);
#endif
https_close(&httpinfo);
return;
}
// Get the response
char response[4096];
struct phr_header headers[100];
int pret, minor_version, status, dl_valid;
size_t buflen = 0, prevbuflen = 0, num_headers, msg_len;
ssize_t rret;
const char *msg;
while (1)
{
// Read the response
while ((rret = https_read(&httpinfo, &response[buflen], 1)) == -1 && errno == EINTR)
;
if (rret <= 0)
{
#ifdef DEBUG_NETWORK
gprintf("rret error %i\n", rret);
#endif
https_close(&httpinfo);
return;
}
prevbuflen = buflen;
buflen += rret;
// Parse the response
num_headers = sizeof(headers) / sizeof(headers[0]);
pret = phr_parse_response(response, buflen, &minor_version, &status, &msg, &msg_len, headers, &num_headers, prevbuflen);
if (pret > 0)
break; // Successfully parsed the response
else if (pret == -1)
{
#ifdef DEBUG_NETWORK
gprintf("pret error %i\n", pret);
#endif
https_close(&httpinfo);
return;
}
// Response is incomplete so continue the loop
if (buflen == sizeof(response))
{
#ifdef DEBUG_NETWORK
gprintf("buflen error %i\n", buflen);
#endif
https_close(&httpinfo);
return;
}
}
// The website wants to redirect us
if (status == 301 || status == 302)
{
https_close(&httpinfo);
if (loop == REDIRECT_LIMIT)
{
#ifdef DEBUG_NETWORK
gprintf("Reached redirect limit\n");
#endif
return;
}
loop++;
char location[2100] = {};
if (!get_header_value(headers, num_headers, location, "location"))
return;
#ifdef DEBUG_NETWORK
gprintf("Redirect #%i - %s\n", loop, location);
#endif
downloadfile(location, buffer);
return;
}
// It's not 301 or 302, so reset the loop
loop = 0;
// Exit if it's a GameTDB HEAD request
if (buffer->gametdbcheck)
{
buffer->gametdbcheck = get_header_value_int(headers, num_headers, "x-gametdb-timestamp");
https_close(&httpinfo);
return;
}
// We got what we wanted
if (status == 200)
{
buffer->data = malloc(4096);
memcpy(buffer->data, &response[pret], buflen - pret);
if (buffer->show_progress)
buffer->content_length = get_header_value_int(headers, num_headers, "content-length");
// Determine how to read the data
if (is_chunked(headers, num_headers))
dl_valid = read_chunked(&httpinfo, buffer, buflen - pret);
else
dl_valid = read_all(&httpinfo, buffer, buflen - pret);
// Check if the download is incomplete
if (!dl_valid || buffer->size <= 0)
{
buffer->size = 0;
free(buffer->data);
#ifdef DEBUG_NETWORK
gprintf("Removed incomplete download\n");
#endif
https_close(&httpinfo);
return;
}
// Save the session
if (httpinfo.use_https)
session = wolfSSL_get_session(httpinfo.ssl);
// Finished
https_close(&httpinfo);
#ifdef DEBUG_NETWORK
gprintf("Download size: %llu\n", buffer->size);
gprintf("Headers:\n");
for (size_t i = 0; i != num_headers; ++i)
gprintf("%.*s: %.*s\n", (int)headers[i].name_len, headers[i].name, (int)headers[i].value_len, headers[i].value);
#endif
return;
}
// Close on all other status codes
#ifdef DEBUG_NETWORK
gprintf("Status code: %i - %s\n", status, url);
#endif
https_close(&httpinfo);
}
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