diff options
Diffstat (limited to 'external/libcurl_android/jni/libcurl/lib/security.c')
| -rwxr-xr-x | external/libcurl_android/jni/libcurl/lib/security.c | 601 |
1 files changed, 0 insertions, 601 deletions
diff --git a/external/libcurl_android/jni/libcurl/lib/security.c b/external/libcurl_android/jni/libcurl/lib/security.c deleted file mode 100755 index 508c7b41..00000000 --- a/external/libcurl_android/jni/libcurl/lib/security.c +++ /dev/null @@ -1,601 +0,0 @@ -/* This source code was modified by Martin Hedenfalk <mhe@stacken.kth.se> for - * use in Curl. His latest changes were done 2000-09-18. - * - * It has since been patched and modified a lot by Daniel Stenberg - * <daniel@haxx.se> to make it better applied to curl conditions, and to make - * it not use globals, pollute name space and more. This source code awaits a - * rewrite to work around the paragraph 2 in the BSD licenses as explained - * below. - * - * Copyright (c) 1998, 1999, 2013 Kungliga Tekniska Högskolan - * (Royal Institute of Technology, Stockholm, Sweden). - * - * Copyright (C) 2001 - 2013, Daniel Stenberg, <daniel@haxx.se>, et al. - * - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * 3. Neither the name of the Institute nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. */ - -#include "curl_setup.h" - -#ifndef CURL_DISABLE_FTP -#ifdef HAVE_GSSAPI - -#ifdef HAVE_NETDB_H -#include <netdb.h> -#endif - -#ifdef HAVE_LIMITS_H -#include <limits.h> -#endif - -#include "urldata.h" -#include "curl_base64.h" -#include "curl_memory.h" -#include "curl_sec.h" -#include "ftp.h" -#include "sendf.h" -#include "rawstr.h" -#include "warnless.h" - -/* The last #include file should be: */ -#include "memdebug.h" - -static const struct { - enum protection_level level; - const char *name; -} level_names[] = { - { PROT_CLEAR, "clear" }, - { PROT_SAFE, "safe" }, - { PROT_CONFIDENTIAL, "confidential" }, - { PROT_PRIVATE, "private" } -}; - -static enum protection_level -name_to_level(const char *name) -{ - int i; - for(i = 0; i < (int)sizeof(level_names)/(int)sizeof(level_names[0]); i++) - if(checkprefix(name, level_names[i].name)) - return level_names[i].level; - return PROT_NONE; -} - -/* Convert a protocol |level| to its char representation. - We take an int to catch programming mistakes. */ -static char level_to_char(int level) { - switch(level) { - case PROT_CLEAR: - return 'C'; - case PROT_SAFE: - return 'S'; - case PROT_CONFIDENTIAL: - return 'E'; - case PROT_PRIVATE: - return 'P'; - case PROT_CMD: - /* Fall through */ - default: - /* Those 2 cases should not be reached! */ - break; - } - DEBUGASSERT(0); - /* Default to the most secure alternative. */ - return 'P'; -} - -static const struct Curl_sec_client_mech * const mechs[] = { -#ifdef HAVE_GSSAPI - &Curl_krb5_client_mech, -#endif - NULL -}; - -/* Send an FTP command defined by |message| and the optional arguments. The - function returns the ftp_code. If an error occurs, -1 is returned. */ -static int ftp_send_command(struct connectdata *conn, const char *message, ...) -{ - int ftp_code; - ssize_t nread; - va_list args; - char print_buffer[50]; - - va_start(args, message); - vsnprintf(print_buffer, sizeof(print_buffer), message, args); - va_end(args); - - if(Curl_ftpsendf(conn, print_buffer) != CURLE_OK) { - ftp_code = -1; - } - else { - if(Curl_GetFTPResponse(&nread, conn, &ftp_code) != CURLE_OK) - ftp_code = -1; - } - - (void)nread; /* Unused */ - return ftp_code; -} - -/* Read |len| from the socket |fd| and store it in |to|. Return a CURLcode - saying whether an error occurred or CURLE_OK if |len| was read. */ -static CURLcode -socket_read(curl_socket_t fd, void *to, size_t len) -{ - char *to_p = to; - CURLcode code; - ssize_t nread; - - while(len > 0) { - code = Curl_read_plain(fd, to_p, len, &nread); - if(code == CURLE_OK) { - len -= nread; - to_p += nread; - } - else { - /* FIXME: We are doing a busy wait */ - if(code == CURLE_AGAIN) - continue; - return code; - } - } - return CURLE_OK; -} - - -/* Write |len| bytes from the buffer |to| to the socket |fd|. Return a - CURLcode saying whether an error occurred or CURLE_OK if |len| was - written. */ -static CURLcode -socket_write(struct connectdata *conn, curl_socket_t fd, const void *to, - size_t len) -{ - const char *to_p = to; - CURLcode code; - ssize_t written; - - while(len > 0) { - code = Curl_write_plain(conn, fd, to_p, len, &written); - if(code == CURLE_OK) { - len -= written; - to_p += written; - } - else { - /* FIXME: We are doing a busy wait */ - if(code == CURLE_AGAIN) - continue; - return code; - } - } - return CURLE_OK; -} - -static CURLcode read_data(struct connectdata *conn, - curl_socket_t fd, - struct krb5buffer *buf) -{ - int len; - void* tmp; - CURLcode ret; - - ret = socket_read(fd, &len, sizeof(len)); - if(ret != CURLE_OK) - return ret; - - len = ntohl(len); - tmp = realloc(buf->data, len); - if(tmp == NULL) - return CURLE_OUT_OF_MEMORY; - - buf->data = tmp; - ret = socket_read(fd, buf->data, len); - if(ret != CURLE_OK) - return ret; - buf->size = conn->mech->decode(conn->app_data, buf->data, len, - conn->data_prot, conn); - buf->index = 0; - return CURLE_OK; -} - -static size_t -buffer_read(struct krb5buffer *buf, void *data, size_t len) -{ - if(buf->size - buf->index < len) - len = buf->size - buf->index; - memcpy(data, (char*)buf->data + buf->index, len); - buf->index += len; - return len; -} - -/* Matches Curl_recv signature */ -static ssize_t sec_recv(struct connectdata *conn, int sockindex, - char *buffer, size_t len, CURLcode *err) -{ - size_t bytes_read; - size_t total_read = 0; - curl_socket_t fd = conn->sock[sockindex]; - - *err = CURLE_OK; - - /* Handle clear text response. */ - if(conn->sec_complete == 0 || conn->data_prot == PROT_CLEAR) - return read(fd, buffer, len); - - if(conn->in_buffer.eof_flag) { - conn->in_buffer.eof_flag = 0; - return 0; - } - - bytes_read = buffer_read(&conn->in_buffer, buffer, len); - len -= bytes_read; - total_read += bytes_read; - buffer += bytes_read; - - while(len > 0) { - if(read_data(conn, fd, &conn->in_buffer) != CURLE_OK) - return -1; - if(conn->in_buffer.size == 0) { - if(bytes_read > 0) - conn->in_buffer.eof_flag = 1; - return bytes_read; - } - bytes_read = buffer_read(&conn->in_buffer, buffer, len); - len -= bytes_read; - total_read += bytes_read; - buffer += bytes_read; - } - /* FIXME: Check for overflow */ - return total_read; -} - -/* Send |length| bytes from |from| to the |fd| socket taking care of encoding - and negociating with the server. |from| can be NULL. */ -/* FIXME: We don't check for errors nor report any! */ -static void do_sec_send(struct connectdata *conn, curl_socket_t fd, - const char *from, int length) -{ - int bytes, htonl_bytes; /* 32-bit integers for htonl */ - char *buffer = NULL; - char *cmd_buffer; - size_t cmd_size = 0; - CURLcode error; - enum protection_level prot_level = conn->data_prot; - bool iscmd = (prot_level == PROT_CMD)?TRUE:FALSE; - - DEBUGASSERT(prot_level > PROT_NONE && prot_level < PROT_LAST); - - if(iscmd) { - if(!strncmp(from, "PASS ", 5) || !strncmp(from, "ACCT ", 5)) - prot_level = PROT_PRIVATE; - else - prot_level = conn->command_prot; - } - bytes = conn->mech->encode(conn->app_data, from, length, prot_level, - (void**)&buffer, conn); - if(!buffer || bytes <= 0) - return; /* error */ - - if(iscmd) { - error = Curl_base64_encode(conn->data, buffer, curlx_sitouz(bytes), - &cmd_buffer, &cmd_size); - if(error) { - free(buffer); - return; /* error */ - } - if(cmd_size > 0) { - static const char *enc = "ENC "; - static const char *mic = "MIC "; - if(prot_level == PROT_PRIVATE) - socket_write(conn, fd, enc, 4); - else - socket_write(conn, fd, mic, 4); - - socket_write(conn, fd, cmd_buffer, cmd_size); - socket_write(conn, fd, "\r\n", 2); - infof(conn->data, "Send: %s%s\n", prot_level == PROT_PRIVATE?enc:mic, - cmd_buffer); - free(cmd_buffer); - } - } - else { - htonl_bytes = htonl(bytes); - socket_write(conn, fd, &htonl_bytes, sizeof(htonl_bytes)); - socket_write(conn, fd, buffer, curlx_sitouz(bytes)); - } - free(buffer); -} - -static ssize_t sec_write(struct connectdata *conn, curl_socket_t fd, - const char *buffer, size_t length) -{ - /* FIXME: Check for overflow */ - ssize_t tx = 0, len = conn->buffer_size; - - len -= conn->mech->overhead(conn->app_data, conn->data_prot, - curlx_sztosi(len)); - if(len <= 0) - len = length; - while(length) { - if(len >= 0 || length < (size_t)len) { - /* FIXME: Check for overflow. */ - len = length; - } - do_sec_send(conn, fd, buffer, curlx_sztosi(len)); - length -= len; - buffer += len; - tx += len; - } - return tx; -} - -/* Matches Curl_send signature */ -static ssize_t sec_send(struct connectdata *conn, int sockindex, - const void *buffer, size_t len, CURLcode *err) -{ - curl_socket_t fd = conn->sock[sockindex]; - *err = CURLE_OK; - return sec_write(conn, fd, buffer, len); -} - -int Curl_sec_read_msg(struct connectdata *conn, char *buffer, - enum protection_level level) -{ - /* decoded_len should be size_t or ssize_t but conn->mech->decode returns an - int */ - int decoded_len; - char *buf; - int ret_code; - size_t decoded_sz = 0; - CURLcode error; - - DEBUGASSERT(level > PROT_NONE && level < PROT_LAST); - - error = Curl_base64_decode(buffer + 4, (unsigned char **)&buf, &decoded_sz); - if(error || decoded_sz == 0) - return -1; - - if(decoded_sz > (size_t)INT_MAX) { - free(buf); - return -1; - } - decoded_len = curlx_uztosi(decoded_sz); - - decoded_len = conn->mech->decode(conn->app_data, buf, decoded_len, - level, conn); - if(decoded_len <= 0) { - free(buf); - return -1; - } - - if(conn->data->set.verbose) { - buf[decoded_len] = '\n'; - Curl_debug(conn->data, CURLINFO_HEADER_IN, buf, decoded_len + 1, conn); - } - - buf[decoded_len] = '\0'; - DEBUGASSERT(decoded_len > 3); - if(buf[3] == '-') - ret_code = 0; - else { - /* Check for error? */ - sscanf(buf, "%d", &ret_code); - } - - if(buf[decoded_len - 1] == '\n') - buf[decoded_len - 1] = '\0'; - /* FIXME: Is |buffer| length always greater than |decoded_len|? */ - strcpy(buffer, buf); - free(buf); - return ret_code; -} - -/* FIXME: The error code returned here is never checked. */ -static int sec_set_protection_level(struct connectdata *conn) -{ - int code; - char* pbsz; - static unsigned int buffer_size = 1 << 20; /* 1048576 */ - enum protection_level level = conn->request_data_prot; - - DEBUGASSERT(level > PROT_NONE && level < PROT_LAST); - - if(!conn->sec_complete) { - infof(conn->data, "Trying to change the protection level after the" - "completion of the data exchange.\n"); - return -1; - } - - /* Bail out if we try to set up the same level */ - if(conn->data_prot == level) - return 0; - - if(level) { - code = ftp_send_command(conn, "PBSZ %u", buffer_size); - if(code < 0) - return -1; - - if(code/100 != 2) { - failf(conn->data, "Failed to set the protection's buffer size."); - return -1; - } - conn->buffer_size = buffer_size; - - pbsz = strstr(conn->data->state.buffer, "PBSZ="); - if(pbsz) { - /* FIXME: Checks for errors in sscanf? */ - sscanf(pbsz, "PBSZ=%u", &buffer_size); - if(buffer_size < conn->buffer_size) - conn->buffer_size = buffer_size; - } - } - - /* Now try to negiociate the protection level. */ - code = ftp_send_command(conn, "PROT %c", level_to_char(level)); - - if(code < 0) - return -1; - - if(code/100 != 2) { - failf(conn->data, "Failed to set the protection level."); - return -1; - } - - conn->data_prot = level; - if(level == PROT_PRIVATE) - conn->command_prot = level; - - return 0; -} - -int -Curl_sec_request_prot(struct connectdata *conn, const char *level) -{ - enum protection_level l = name_to_level(level); - if(l == PROT_NONE) - return -1; - DEBUGASSERT(l > PROT_NONE && l < PROT_LAST); - conn->request_data_prot = l; - return 0; -} - -static CURLcode choose_mech(struct connectdata *conn) -{ - int ret; - struct SessionHandle *data = conn->data; - const struct Curl_sec_client_mech * const *mech; - void *tmp_allocation; - const char *mech_name; - - for(mech = mechs; (*mech); ++mech) { - mech_name = (*mech)->name; - /* We have no mechanism with a NULL name but keep this check */ - DEBUGASSERT(mech_name != NULL); - if(mech_name == NULL) { - infof(data, "Skipping mechanism with empty name (%p)\n", (void *)mech); - continue; - } - tmp_allocation = realloc(conn->app_data, (*mech)->size); - if(tmp_allocation == NULL) { - failf(data, "Failed realloc of size %u", (*mech)->size); - mech = NULL; - return CURLE_OUT_OF_MEMORY; - } - conn->app_data = tmp_allocation; - - if((*mech)->init) { - ret = (*mech)->init(conn->app_data); - if(ret != 0) { - infof(data, "Failed initialization for %s. Skipping it.\n", mech_name); - continue; - } - } - - infof(data, "Trying mechanism %s...\n", mech_name); - ret = ftp_send_command(conn, "AUTH %s", mech_name); - if(ret < 0) - /* FIXME: This error is too generic but it is OK for now. */ - return CURLE_COULDNT_CONNECT; - - if(ret/100 != 3) { - switch(ret) { - case 504: - infof(data, "Mechanism %s is not supported by the server (server " - "returned ftp code: 504).\n", mech_name); - break; - case 534: - infof(data, "Mechanism %s was rejected by the server (server returned " - "ftp code: 534).\n", mech_name); - break; - default: - if(ret/100 == 5) { - infof(data, "server does not support the security extensions\n"); - return CURLE_USE_SSL_FAILED; - } - break; - } - continue; - } - - /* Authenticate */ - ret = (*mech)->auth(conn->app_data, conn); - - if(ret == AUTH_CONTINUE) - continue; - else if(ret != AUTH_OK) { - /* Mechanism has dumped the error to stderr, don't error here. */ - return -1; - } - DEBUGASSERT(ret == AUTH_OK); - - conn->mech = *mech; - conn->sec_complete = 1; - conn->recv[FIRSTSOCKET] = sec_recv; - conn->send[FIRSTSOCKET] = sec_send; - conn->recv[SECONDARYSOCKET] = sec_recv; - conn->send[SECONDARYSOCKET] = sec_send; - conn->command_prot = PROT_SAFE; - /* Set the requested protection level */ - /* BLOCKING */ - (void)sec_set_protection_level(conn); - break; - } - - return mech != NULL ? CURLE_OK : CURLE_FAILED_INIT; -} - -CURLcode -Curl_sec_login(struct connectdata *conn) -{ - return choose_mech(conn); -} - - -void -Curl_sec_end(struct connectdata *conn) -{ - if(conn->mech != NULL && conn->mech->end) - conn->mech->end(conn->app_data); - if(conn->app_data) { - free(conn->app_data); - conn->app_data = NULL; - } - if(conn->in_buffer.data) { - free(conn->in_buffer.data); - conn->in_buffer.data = NULL; - conn->in_buffer.size = 0; - conn->in_buffer.index = 0; - /* FIXME: Is this really needed? */ - conn->in_buffer.eof_flag = 0; - } - conn->sec_complete = 0; - conn->data_prot = PROT_CLEAR; - conn->mech = NULL; -} - -#endif /* HAVE_GSSAPI */ - -#endif /* CURL_DISABLE_FTP */ |