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Diffstat (limited to 'indra/llmessage/llblowfishcipher.cpp')
| -rw-r--r-- | indra/llmessage/llblowfishcipher.cpp | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/indra/llmessage/llblowfishcipher.cpp b/indra/llmessage/llblowfishcipher.cpp deleted file mode 100644 index 3973565e22..0000000000 --- a/indra/llmessage/llblowfishcipher.cpp +++ /dev/null @@ -1,129 +0,0 @@ -/** - * @file llblowfishcipher.cpp - * @brief Wrapper around OpenSSL Blowfish encryption algorithm. - * - * $LicenseInfo:firstyear=2007&license=viewerlgpl$ - * Second Life Viewer Source Code - * Copyright (C) 2010, Linden Research, Inc. - * - * This library 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; - * version 2.1 of the License only. - * - * This library 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 this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA - * $/LicenseInfo$ - */ - -#include "linden_common.h" -#include "llblowfishcipher.h" -#include <openssl/evp.h> - - -LLBlowfishCipher::LLBlowfishCipher(const U8* secret, size_t secret_size) -: LLCipher() -{ - llassert(secret); - - mSecretSize = secret_size; - mSecret = new U8[mSecretSize]; - memcpy(mSecret, secret, mSecretSize); -} - -LLBlowfishCipher::~LLBlowfishCipher() -{ - delete [] mSecret; - mSecret = NULL; -} - -// virtual -U32 LLBlowfishCipher::encrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len) -{ - if (!src || !src_len || !dst || !dst_len) return 0; - if (src_len > dst_len) return 0; - - // OpenSSL uses "cipher contexts" to hold encryption parameters. - EVP_CIPHER_CTX *context = EVP_CIPHER_CTX_new(); - if (!context) - { - LL_WARNS() << "LLBlowfishCipher::encrypt EVP_CIPHER_CTX initiation failure" << LL_ENDL; - return 0; - } - - // We want a blowfish cyclic block chain cipher, but need to set - // the key length before we pass in a key, so call EncryptInit - // first with NULLs. - EVP_EncryptInit_ex(context, EVP_bf_cbc(), NULL, NULL, NULL); - EVP_CIPHER_CTX_set_key_length(context, (int)mSecretSize); - - // Complete initialization. Per EVP_EncryptInit man page, the - // cipher pointer must be NULL. Apparently initial_vector must - // be 8 bytes for blowfish, as this is the block size. - unsigned char initial_vector[] = { 0, 0, 0, 0, 0, 0, 0, 0 }; - EVP_EncryptInit_ex(context, NULL, NULL, mSecret, initial_vector); - - int blocksize = EVP_CIPHER_CTX_block_size(context); - int keylen = EVP_CIPHER_CTX_key_length(context); - int iv_length = EVP_CIPHER_CTX_iv_length(context); - LL_DEBUGS() << "LLBlowfishCipher blocksize " << blocksize - << " keylen " << keylen - << " iv_len " << iv_length - << LL_ENDL; - - int output_len = 0; - int temp_len = 0; - if (!EVP_EncryptUpdate(context, - dst, - &output_len, - src, - src_len)) - { - LL_WARNS() << "LLBlowfishCipher::encrypt EVP_EncryptUpdate failure" << LL_ENDL; - goto BF_ENCRYPT_ERROR; - } - - // There may be some final data left to encrypt if the input is - // not an exact multiple of the block size. - if (!EVP_EncryptFinal_ex(context, (unsigned char*)(dst + output_len), &temp_len)) - { - LL_WARNS() << "LLBlowfishCipher::encrypt EVP_EncryptFinal failure" << LL_ENDL; - goto BF_ENCRYPT_ERROR; - } - output_len += temp_len; - - EVP_CIPHER_CTX_free(context); - return output_len; - -BF_ENCRYPT_ERROR: - EVP_CIPHER_CTX_free(context); - return 0; -} - -// virtual -U32 LLBlowfishCipher::decrypt(const U8* src, U32 src_len, U8* dst, U32 dst_len) -{ - LL_ERRS() << "LLBlowfishCipher decrypt unsupported" << LL_ENDL; - return 0; -} - -// virtual -U32 LLBlowfishCipher::requiredEncryptionSpace(U32 len) const -{ - // *HACK: We know blowfish uses an 8 byte block size. - // Oddly, sometimes EVP_Encrypt produces an extra block - // if the input is an exact multiple of the block size. - // So round up. - const U32 BLOCK_SIZE = 8; - len += BLOCK_SIZE; - len -= (len % BLOCK_SIZE); - return len; -} |
