mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-21 10:55:51 +02:00
285 lines
9.5 KiB
C
285 lines
9.5 KiB
C
/*
|
|
* HTTP authentication
|
|
* Copyright (c) 2010 Martin Storsjo
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "httpauth.h"
|
|
#include "libavutil/base64.h"
|
|
#include "libavutil/avstring.h"
|
|
#include "internal.h"
|
|
#include "libavutil/random_seed.h"
|
|
#include "libavutil/md5.h"
|
|
#include "urldecode.h"
|
|
|
|
static void handle_basic_params(HTTPAuthState *state, const char *key,
|
|
int key_len, char **dest, int *dest_len)
|
|
{
|
|
if (!strncmp(key, "realm=", key_len)) {
|
|
*dest = state->realm;
|
|
*dest_len = sizeof(state->realm);
|
|
}
|
|
}
|
|
|
|
static void handle_digest_params(HTTPAuthState *state, const char *key,
|
|
int key_len, char **dest, int *dest_len)
|
|
{
|
|
DigestParams *digest = &state->digest_params;
|
|
|
|
if (!strncmp(key, "realm=", key_len)) {
|
|
*dest = state->realm;
|
|
*dest_len = sizeof(state->realm);
|
|
} else if (!strncmp(key, "nonce=", key_len)) {
|
|
*dest = digest->nonce;
|
|
*dest_len = sizeof(digest->nonce);
|
|
} else if (!strncmp(key, "opaque=", key_len)) {
|
|
*dest = digest->opaque;
|
|
*dest_len = sizeof(digest->opaque);
|
|
} else if (!strncmp(key, "algorithm=", key_len)) {
|
|
*dest = digest->algorithm;
|
|
*dest_len = sizeof(digest->algorithm);
|
|
} else if (!strncmp(key, "qop=", key_len)) {
|
|
*dest = digest->qop;
|
|
*dest_len = sizeof(digest->qop);
|
|
} else if (!strncmp(key, "stale=", key_len)) {
|
|
*dest = digest->stale;
|
|
*dest_len = sizeof(digest->stale);
|
|
}
|
|
}
|
|
|
|
static void handle_digest_update(HTTPAuthState *state, const char *key,
|
|
int key_len, char **dest, int *dest_len)
|
|
{
|
|
DigestParams *digest = &state->digest_params;
|
|
|
|
if (!strncmp(key, "nextnonce=", key_len)) {
|
|
*dest = digest->nonce;
|
|
*dest_len = sizeof(digest->nonce);
|
|
}
|
|
}
|
|
|
|
static void choose_qop(char *qop, int size)
|
|
{
|
|
char *ptr = strstr(qop, "auth");
|
|
char *end = ptr + strlen("auth");
|
|
|
|
if (ptr && (!*end || av_isspace(*end) || *end == ',') &&
|
|
(ptr == qop || av_isspace(ptr[-1]) || ptr[-1] == ',')) {
|
|
av_strlcpy(qop, "auth", size);
|
|
} else {
|
|
qop[0] = 0;
|
|
}
|
|
}
|
|
|
|
void ff_http_auth_handle_header(HTTPAuthState *state, const char *key,
|
|
const char *value)
|
|
{
|
|
if (!av_strcasecmp(key, "WWW-Authenticate") || !av_strcasecmp(key, "Proxy-Authenticate")) {
|
|
const char *p;
|
|
if (av_stristart(value, "Basic ", &p) &&
|
|
state->auth_type <= HTTP_AUTH_BASIC) {
|
|
state->auth_type = HTTP_AUTH_BASIC;
|
|
state->realm[0] = 0;
|
|
state->stale = 0;
|
|
ff_parse_key_value(p, (ff_parse_key_val_cb) handle_basic_params,
|
|
state);
|
|
} else if (av_stristart(value, "Digest ", &p) &&
|
|
state->auth_type <= HTTP_AUTH_DIGEST) {
|
|
state->auth_type = HTTP_AUTH_DIGEST;
|
|
memset(&state->digest_params, 0, sizeof(DigestParams));
|
|
state->realm[0] = 0;
|
|
state->stale = 0;
|
|
ff_parse_key_value(p, (ff_parse_key_val_cb) handle_digest_params,
|
|
state);
|
|
choose_qop(state->digest_params.qop,
|
|
sizeof(state->digest_params.qop));
|
|
if (!av_strcasecmp(state->digest_params.stale, "true"))
|
|
state->stale = 1;
|
|
}
|
|
} else if (!av_strcasecmp(key, "Authentication-Info")) {
|
|
ff_parse_key_value(value, (ff_parse_key_val_cb) handle_digest_update,
|
|
state);
|
|
}
|
|
}
|
|
|
|
|
|
static void update_md5_strings(struct AVMD5 *md5ctx, ...)
|
|
{
|
|
va_list vl;
|
|
|
|
va_start(vl, md5ctx);
|
|
while (1) {
|
|
const char* str = va_arg(vl, const char*);
|
|
if (!str)
|
|
break;
|
|
av_md5_update(md5ctx, str, strlen(str));
|
|
}
|
|
va_end(vl);
|
|
}
|
|
|
|
/* Generate a digest reply, according to RFC 2617. */
|
|
static char *make_digest_auth(HTTPAuthState *state, const char *username,
|
|
const char *password, const char *uri,
|
|
const char *method)
|
|
{
|
|
DigestParams *digest = &state->digest_params;
|
|
int len;
|
|
uint32_t cnonce_buf[2];
|
|
char cnonce[17];
|
|
char nc[9];
|
|
int i;
|
|
char A1hash[33], A2hash[33], response[33];
|
|
struct AVMD5 *md5ctx;
|
|
uint8_t hash[16];
|
|
char *authstr;
|
|
|
|
digest->nc++;
|
|
snprintf(nc, sizeof(nc), "%08x", digest->nc);
|
|
|
|
/* Generate a client nonce. */
|
|
for (i = 0; i < 2; i++)
|
|
cnonce_buf[i] = av_get_random_seed();
|
|
ff_data_to_hex(cnonce, (const uint8_t*) cnonce_buf, sizeof(cnonce_buf), 1);
|
|
|
|
md5ctx = av_md5_alloc();
|
|
if (!md5ctx)
|
|
return NULL;
|
|
|
|
av_md5_init(md5ctx);
|
|
update_md5_strings(md5ctx, username, ":", state->realm, ":", password, NULL);
|
|
av_md5_final(md5ctx, hash);
|
|
ff_data_to_hex(A1hash, hash, 16, 1);
|
|
|
|
if (!strcmp(digest->algorithm, "") || !strcmp(digest->algorithm, "MD5")) {
|
|
} else if (!strcmp(digest->algorithm, "MD5-sess")) {
|
|
av_md5_init(md5ctx);
|
|
update_md5_strings(md5ctx, A1hash, ":", digest->nonce, ":", cnonce, NULL);
|
|
av_md5_final(md5ctx, hash);
|
|
ff_data_to_hex(A1hash, hash, 16, 1);
|
|
} else {
|
|
/* Unsupported algorithm */
|
|
av_free(md5ctx);
|
|
return NULL;
|
|
}
|
|
|
|
av_md5_init(md5ctx);
|
|
update_md5_strings(md5ctx, method, ":", uri, NULL);
|
|
av_md5_final(md5ctx, hash);
|
|
ff_data_to_hex(A2hash, hash, 16, 1);
|
|
|
|
av_md5_init(md5ctx);
|
|
update_md5_strings(md5ctx, A1hash, ":", digest->nonce, NULL);
|
|
if (!strcmp(digest->qop, "auth") || !strcmp(digest->qop, "auth-int")) {
|
|
update_md5_strings(md5ctx, ":", nc, ":", cnonce, ":", digest->qop, NULL);
|
|
}
|
|
update_md5_strings(md5ctx, ":", A2hash, NULL);
|
|
av_md5_final(md5ctx, hash);
|
|
ff_data_to_hex(response, hash, 16, 1);
|
|
|
|
av_free(md5ctx);
|
|
|
|
if (!strcmp(digest->qop, "") || !strcmp(digest->qop, "auth")) {
|
|
} else if (!strcmp(digest->qop, "auth-int")) {
|
|
/* qop=auth-int not supported */
|
|
return NULL;
|
|
} else {
|
|
/* Unsupported qop value. */
|
|
return NULL;
|
|
}
|
|
|
|
len = strlen(username) + strlen(state->realm) + strlen(digest->nonce) +
|
|
strlen(uri) + strlen(response) + strlen(digest->algorithm) +
|
|
strlen(digest->opaque) + strlen(digest->qop) + strlen(cnonce) +
|
|
strlen(nc) + 150;
|
|
|
|
authstr = av_malloc(len);
|
|
if (!authstr)
|
|
return NULL;
|
|
snprintf(authstr, len, "Authorization: Digest ");
|
|
|
|
/* TODO: Escape the quoted strings properly. */
|
|
av_strlcatf(authstr, len, "username=\"%s\"", username);
|
|
av_strlcatf(authstr, len, ", realm=\"%s\"", state->realm);
|
|
av_strlcatf(authstr, len, ", nonce=\"%s\"", digest->nonce);
|
|
av_strlcatf(authstr, len, ", uri=\"%s\"", uri);
|
|
av_strlcatf(authstr, len, ", response=\"%s\"", response);
|
|
|
|
// we are violating the RFC and use "" because all others seem to do that too.
|
|
if (digest->algorithm[0])
|
|
av_strlcatf(authstr, len, ", algorithm=\"%s\"", digest->algorithm);
|
|
|
|
if (digest->opaque[0])
|
|
av_strlcatf(authstr, len, ", opaque=\"%s\"", digest->opaque);
|
|
if (digest->qop[0]) {
|
|
av_strlcatf(authstr, len, ", qop=\"%s\"", digest->qop);
|
|
av_strlcatf(authstr, len, ", cnonce=\"%s\"", cnonce);
|
|
av_strlcatf(authstr, len, ", nc=%s", nc);
|
|
}
|
|
|
|
av_strlcatf(authstr, len, "\r\n");
|
|
|
|
return authstr;
|
|
}
|
|
|
|
char *ff_http_auth_create_response(HTTPAuthState *state, const char *auth,
|
|
const char *path, const char *method)
|
|
{
|
|
char *authstr = NULL;
|
|
|
|
/* Clear the stale flag, we assume the auth is ok now. It is reset
|
|
* by the server headers if there's a new issue. */
|
|
state->stale = 0;
|
|
if (!auth || !strchr(auth, ':'))
|
|
return NULL;
|
|
|
|
if (state->auth_type == HTTP_AUTH_BASIC) {
|
|
int auth_b64_len, len;
|
|
char *ptr, *decoded_auth = ff_urldecode(auth, 0);
|
|
|
|
if (!decoded_auth)
|
|
return NULL;
|
|
|
|
auth_b64_len = AV_BASE64_SIZE(strlen(decoded_auth));
|
|
len = auth_b64_len + 30;
|
|
|
|
authstr = av_malloc(len);
|
|
if (!authstr) {
|
|
av_free(decoded_auth);
|
|
return NULL;
|
|
}
|
|
|
|
snprintf(authstr, len, "Authorization: Basic ");
|
|
ptr = authstr + strlen(authstr);
|
|
av_base64_encode(ptr, auth_b64_len, decoded_auth, strlen(decoded_auth));
|
|
av_strlcat(ptr, "\r\n", len - (ptr - authstr));
|
|
av_free(decoded_auth);
|
|
} else if (state->auth_type == HTTP_AUTH_DIGEST) {
|
|
char *username = ff_urldecode(auth, 0), *password;
|
|
|
|
if (!username)
|
|
return NULL;
|
|
|
|
if ((password = strchr(username, ':'))) {
|
|
*password++ = 0;
|
|
authstr = make_digest_auth(state, username, password, path, method);
|
|
}
|
|
av_free(username);
|
|
}
|
|
return authstr;
|
|
}
|