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/************************************************************************ |
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* IRC - Internet Relay Chat, servlink/servlink.c |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 1, or (at your option) |
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* any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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* |
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* $Id$ |
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*/ |
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|
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#include "stdinc.h" |
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|
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#ifdef HAVE_LIBCRYPTO |
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#include <openssl/evp.h> |
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#include <openssl/err.h> |
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#endif |
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#ifdef HAVE_LIBZ |
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#include <zlib.h> |
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#endif |
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|
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#include "servlink.h" |
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#include "io.h" |
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#include "control.h" |
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|
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static cmd_handler cmd_set_zip_out_level; |
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static cmd_handler cmd_start_zip_out; |
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static cmd_handler cmd_start_zip_in; |
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static cmd_handler cmd_set_crypt_in_cipher; |
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static cmd_handler cmd_set_crypt_in_key; |
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static cmd_handler cmd_start_crypt_in; |
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static cmd_handler cmd_set_crypt_out_cipher; |
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static cmd_handler cmd_set_crypt_out_key; |
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static cmd_handler cmd_start_crypt_out; |
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static cmd_handler cmd_init; |
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|
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struct command_def command_table[] = |
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{ |
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{ CMD_SET_ZIP_OUT_LEVEL, cmd_set_zip_out_level, COMMAND_FLAG_DATA }, |
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{ CMD_START_ZIP_OUT, cmd_start_zip_out, 0 }, |
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{ CMD_START_ZIP_IN, cmd_start_zip_in, 0 }, |
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{ CMD_SET_CRYPT_IN_CIPHER, cmd_set_crypt_in_cipher, COMMAND_FLAG_DATA }, |
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{ CMD_SET_CRYPT_IN_KEY, cmd_set_crypt_in_key, COMMAND_FLAG_DATA }, |
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{ CMD_START_CRYPT_IN, cmd_start_crypt_in, 0 }, |
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{ CMD_SET_CRYPT_OUT_CIPHER, cmd_set_crypt_out_cipher, COMMAND_FLAG_DATA }, |
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{ CMD_SET_CRYPT_OUT_KEY, cmd_set_crypt_out_key, COMMAND_FLAG_DATA }, |
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{ CMD_START_CRYPT_OUT, cmd_start_crypt_out, 0 }, |
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{ CMD_INJECT_RECVQ, process_recvq, COMMAND_FLAG_DATA }, |
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{ CMD_INJECT_SENDQ, process_sendq, COMMAND_FLAG_DATA }, |
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{ CMD_INIT, cmd_init, 0 }, |
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{ CMD_ZIPSTATS, send_zipstats, 0 }, |
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{ 0, 0, 0 } |
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}; |
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|
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void |
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cmd_set_zip_out_level(struct ctrl_command *cmd) |
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{ |
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#ifdef HAVE_LIBZ |
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out_state.zip_state.level = *cmd->data; |
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if ((out_state.zip_state.level < -1) || |
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(out_state.zip_state.level > 9)) |
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send_error("invalid compression level %d", |
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out_state.zip_state.level); |
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#else |
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send_error("can't set compression level - no libz support!"); |
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#endif |
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} |
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|
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void |
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cmd_start_zip_out(struct ctrl_command *cmd) |
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{ |
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#ifdef HAVE_LIBZ |
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int ret; |
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|
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if (out_state.zip) |
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send_error("can't start compression - already started!"); |
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|
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out_state.zip_state.stream.total_in = 0; |
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out_state.zip_state.stream.total_out = 0; |
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out_state.zip_state.stream.zalloc = (alloc_func)0; |
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out_state.zip_state.stream.zfree = (free_func)0; |
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out_state.zip_state.stream.data_type = Z_ASCII; |
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|
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if (out_state.zip_state.level <= 0) |
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out_state.zip_state.level = Z_DEFAULT_COMPRESSION; |
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|
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if ((ret = deflateInit(&out_state.zip_state.stream, |
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out_state.zip_state.level)) != Z_OK) |
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send_error("deflateInit failed: %d (%s)", ret, zError(ret)); |
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|
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out_state.zip = 1; |
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#else |
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send_error("can't start compression - no libz support!"); |
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#endif |
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} |
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|
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void |
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cmd_start_zip_in(struct ctrl_command *cmd) |
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{ |
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#ifdef HAVE_LIBZ |
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int ret; |
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|
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if (in_state.zip) |
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send_error("can't start decompression - already started!"); |
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|
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in_state.zip_state.stream.total_in = 0; |
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in_state.zip_state.stream.total_out = 0; |
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in_state.zip_state.stream.zalloc = (alloc_func)0; |
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in_state.zip_state.stream.zfree = (free_func)0; |
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in_state.zip_state.stream.data_type = Z_ASCII; |
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if ((ret = inflateInit(&in_state.zip_state.stream)) != Z_OK) |
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send_error("inflateInit failed: %d (%s)", ret, zError(ret)); |
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in_state.zip = 1; |
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#else |
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send_error("can't start decompression - no libz support!"); |
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#endif |
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} |
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|
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void |
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cmd_set_crypt_in_cipher(struct ctrl_command *cmd) |
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{ |
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#ifdef HAVE_LIBCRYPTO |
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unsigned int cipher = *cmd->data; |
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|
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if (in_state.crypt_state.cipher) |
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send_error("can't set decryption cipher - already set!"); |
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|
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switch (cipher) |
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{ |
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#ifdef HAVE_EVP_BF_CFB |
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case CIPHER_BF: |
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in_state.crypt_state.cipher = EVP_bf_cfb(); |
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break; |
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#endif |
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#ifdef HAVE_EVP_CAST5_CFB |
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case CIPHER_CAST: |
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in_state.crypt_state.cipher = EVP_cast5_cfb(); |
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break; |
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#endif |
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#ifdef HAVE_EVP_DES_CFB |
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case CIPHER_DES: |
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in_state.crypt_state.cipher = EVP_des_cfb(); |
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break; |
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#endif |
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#ifdef HAVE_EVP_DES_EDE3_CFB |
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case CIPHER_3DES: |
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in_state.crypt_state.cipher = EVP_des_ede3_cfb(); |
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break; |
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#endif |
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#ifdef HAVE_EVP_IDEA_CFB |
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case CIPHER_IDEA: |
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in_state.crypt_state.cipher = EVP_idea_cfb(); |
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break; |
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#endif |
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#ifdef HAVE_EVP_RC5_32_12_16_CFB |
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case CIPHER_RC5_8: |
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in_state.crypt_state.cipher = EVP_rc5_32_12_16_cfb(); |
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in_state.crypt_state.rounds = 8; |
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break; |
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case CIPHER_RC5_12: |
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in_state.crypt_state.cipher = EVP_rc5_32_12_16_cfb(); |
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in_state.crypt_state.rounds = 12; |
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break; |
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case CIPHER_RC5_16: |
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in_state.crypt_state.cipher = EVP_rc5_32_12_16_cfb(); |
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in_state.crypt_state.rounds = 16; |
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break; |
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#endif |
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default: |
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send_error("can't set decryption cipher - invalid cipher: %d!", |
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cipher); /* invalid cipher */ |
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break; |
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} |
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#else |
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send_error("can't set decryption cipher - no OpenSSL support!"); |
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#endif |
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} |
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|
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void |
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cmd_set_crypt_in_key(struct ctrl_command *cmd) |
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{ |
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#ifdef HAVE_LIBCRYPTO |
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if (in_state.crypt_state.key) |
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send_error("can't set decryption key - already set!"); |
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|
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in_state.crypt_state.keylen = cmd->datalen; |
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in_state.crypt_state.key = malloc(cmd->datalen); |
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|
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memcpy(in_state.crypt_state.key, cmd->data, cmd->datalen); |
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#else |
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send_error("can't set decryption key - no OpenSSL support!"); |
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#endif |
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} |
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|
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void |
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cmd_start_crypt_in(struct ctrl_command *cmd) |
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{ |
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#ifdef HAVE_LIBCRYPTO |
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if (in_state.crypt) |
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send_error("can't start decryption - already started!"); |
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|
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if (!in_state.crypt_state.cipher) |
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send_error("can't start decryption - no cipher set!"); |
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|
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if (!in_state.crypt_state.key) |
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send_error("can't start decryption - no key set!"); |
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|
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in_state.crypt = 1; |
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if (!EVP_DecryptInit(&in_state.crypt_state.ctx, |
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in_state.crypt_state.cipher, NULL, NULL)) |
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send_error("can't start decryption - DecryptInit (1) failed: %s!", |
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ERR_error_string(ERR_get_error(), NULL)); |
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|
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if (!EVP_CIPHER_CTX_set_key_length(&in_state.crypt_state.ctx, |
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in_state.crypt_state.keylen)) |
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send_error("can't start decryption - set_key_length failed: %s!", |
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ERR_error_string(ERR_get_error(), NULL)); |
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|
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in_state.crypt_state.ivlen = |
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EVP_CIPHER_CTX_iv_length(&in_state.crypt_state.ctx); |
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|
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if (in_state.crypt_state.ivlen) |
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in_state.crypt_state.iv = calloc(in_state.crypt_state.ivlen, 1); |
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|
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if (in_state.crypt_state.rounds) |
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{ |
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if (!EVP_CIPHER_CTX_ctrl(&in_state.crypt_state.ctx, |
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EVP_CTRL_SET_RC5_ROUNDS, |
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in_state.crypt_state.rounds, |
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NULL)) |
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send_error("can't start decryption - SET_RC5_ROUNDS failed: %s!", |
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ERR_error_string(ERR_get_error(), NULL)); |
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} |
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|
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if (!EVP_DecryptInit(&in_state.crypt_state.ctx, |
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NULL, |
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in_state.crypt_state.key, |
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in_state.crypt_state.iv)) |
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send_error("can't start decryption - DecryptInit (2) failed: %s!", |
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ERR_error_string(ERR_get_error(), NULL)); |
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#else |
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send_error("can't start decryption - no OpenSSL support!"); |
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#endif |
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} |
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|
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void |
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cmd_set_crypt_out_cipher(struct ctrl_command *cmd) |
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{ |
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#ifdef HAVE_LIBCRYPTO |
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unsigned int cipher = *cmd->data; |
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|
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if (out_state.crypt_state.cipher) |
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send_error("can't set encryption cipher - already set!"); |
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|
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switch (cipher) |
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{ |
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#ifdef HAVE_EVP_BF_CFB |
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case CIPHER_BF: |
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out_state.crypt_state.cipher = EVP_bf_cfb(); |
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break; |
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#endif |
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#ifdef HAVE_EVP_CAST5_CFB |
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case CIPHER_CAST: |
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out_state.crypt_state.cipher = EVP_cast5_cfb(); |
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break; |
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#endif |
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#ifdef HAVE_EVP_DES_CFB |
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case CIPHER_DES: |
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out_state.crypt_state.cipher = EVP_des_cfb(); |
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break; |
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#endif |
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#ifdef HAVE_EVP_DES_EDE3_CFB |
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case CIPHER_3DES: |
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out_state.crypt_state.cipher = EVP_des_ede3_cfb(); |
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break; |
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#endif |
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#ifdef HAVE_EVP_IDEA_CFB |
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case CIPHER_IDEA: |
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out_state.crypt_state.cipher = EVP_idea_cfb(); |
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break; |
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#endif |
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#ifdef HAVE_EVP_RC5_32_12_16_CFB |
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case CIPHER_RC5_8: |
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out_state.crypt_state.cipher = EVP_rc5_32_12_16_cfb(); |
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out_state.crypt_state.rounds = 8; |
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break; |
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case CIPHER_RC5_12: |
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out_state.crypt_state.cipher = EVP_rc5_32_12_16_cfb(); |
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out_state.crypt_state.rounds = 12; |
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break; |
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case CIPHER_RC5_16: |
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out_state.crypt_state.cipher = EVP_rc5_32_12_16_cfb(); |
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out_state.crypt_state.rounds = 16; |
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break; |
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#endif |
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default: |
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send_error("can't set encryption cipher - invalid cipher %d!", |
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cipher); /* invalid cipher */ |
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} |
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#else |
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send_error("can't set encryption cipher - no OpenSSL support!"); |
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#endif |
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} |
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|
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void |
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cmd_set_crypt_out_key(struct ctrl_command *cmd) |
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{ |
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#ifdef HAVE_LIBCRYPTO |
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if (out_state.crypt_state.key) |
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send_error("can't set encryption key - already set!"); |
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|
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out_state.crypt_state.keylen = cmd->datalen; |
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out_state.crypt_state.key = malloc(cmd->datalen); |
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|
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memcpy(out_state.crypt_state.key, cmd->data, cmd->datalen); |
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#else |
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send_error("can't set encryption key - no OpenSSL support!"); |
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#endif |
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} |
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|
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void |
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cmd_start_crypt_out(struct ctrl_command *cmd) |
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{ |
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#ifdef HAVE_LIBCRYPTO |
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if (out_state.crypt) |
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send_error("can't start encryption - already started!"); |
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|
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if (!out_state.crypt_state.cipher) |
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send_error("can't start encryption - no cipher set!"); |
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|
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if (!out_state.crypt_state.key) |
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send_error("can't start encryption - no key set!"); |
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|
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out_state.crypt = 1; |
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if (!EVP_EncryptInit(&out_state.crypt_state.ctx, |
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out_state.crypt_state.cipher, NULL, NULL)) |
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send_error("can't start encryption - EncryptInit (1) failed: %s!", |
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ERR_error_string(ERR_get_error(), NULL)); |
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|
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if (!EVP_CIPHER_CTX_set_key_length(&out_state.crypt_state.ctx, |
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out_state.crypt_state.keylen)) |
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send_error("can't start encryption - set_key_length failed: %s!", |
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ERR_error_string(ERR_get_error(), NULL)); |
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|
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out_state.crypt_state.ivlen = |
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EVP_CIPHER_CTX_iv_length(&out_state.crypt_state.ctx); |
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|
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if (out_state.crypt_state.ivlen) |
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out_state.crypt_state.iv = calloc(out_state.crypt_state.ivlen, 1); |
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|
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if (out_state.crypt_state.rounds) |
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{ |
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if (!EVP_CIPHER_CTX_ctrl(&out_state.crypt_state.ctx, |
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EVP_CTRL_SET_RC5_ROUNDS, |
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out_state.crypt_state.rounds, NULL)) |
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send_error("can't start encryption - SET_RC5_ROUNDS failed: %s!", |
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ERR_error_string(ERR_get_error(), NULL)); |
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} |
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|
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if (!EVP_EncryptInit(&out_state.crypt_state.ctx, |
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NULL, |
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out_state.crypt_state.key, |
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out_state.crypt_state.iv)) |
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send_error("can't start encryption - EncryptInit (2) failed: %s!", |
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ERR_error_string(ERR_get_error(), NULL)); |
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#else |
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send_error("can't start encryption - no OpenSSL suppport!"); |
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#endif |
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} |
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|
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void |
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cmd_init(struct ctrl_command *cmd) |
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{ |
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if (in_state.active || out_state.active) |
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send_error("CMD_INIT sent twice!"); |
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|
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in_state.active = 1; |
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out_state.active = 1; |
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CONTROL_R.read_cb = read_ctrl; |
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CONTROL_W.write_cb = NULL; |
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LOCAL_R.read_cb = read_data; |
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LOCAL_W.write_cb = NULL; |
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REMOTE_R.read_cb = read_net; |
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REMOTE_W.write_cb = NULL; |
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} |
