wraitii
369c2e8801
GUIObjectBase is made a IGUIObject* to avoid including those headers un-necessarily. Subsequent diffs ought to clean up the various of pointers for that with a similar type with reference semantics. Also: - Add standard C and C++ headers (mostly cstring for memcpy, string and vector) where needed. - Swap out some includes for forward declarations - Clean up un-necessary boost includes in precompiled and other headers. - Clean up precompiled headers, including fewer things. - Move ACPI to the windows-specific folder as it's included there only and mostly specific to that platform. Thanks Stan for the testing. Differential Revision: https://code.wildfiregames.com/D3129 This was SVN commit r24352.
105 lines
3.6 KiB
C++
105 lines
3.6 KiB
C++
/**
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* Copyright (c) 2008 Damien Bergamini <damien.bergamini@free.fr>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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// This file is based loosly off libutil/pkcs5_pbkdf2.c in OpenBSD.
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#include "precompiled.h"
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#include "pkcs5_pbkdf2.h"
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#include <cstring>
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// This does not match libsodium crypto_auth_hmacsha256, which has a constant key_len.
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static void hmac_sha256(unsigned char (&digest)[crypto_hash_sha256_BYTES],
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const unsigned char* text, size_t text_len,
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const unsigned char* key, size_t key_len)
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{
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crypto_hash_sha256_state state;
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crypto_hash_sha256_init(&state);
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unsigned char tk[crypto_hash_sha256_BYTES]; // temporary key in case we need to pad the key with zero unsigned chars
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if (key_len > crypto_hash_sha256_BYTES)
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{
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crypto_hash_sha256_update(&state, key, key_len);
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crypto_hash_sha256_final(&state, tk);
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key = tk;
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key_len = crypto_hash_sha256_BYTES;
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}
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unsigned char k_pad[crypto_hash_sha256_BYTES];
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memset(k_pad, 0, sizeof k_pad);
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memcpy(k_pad, key, key_len);
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for (unsigned int i = 0; i < crypto_hash_sha256_BYTES; ++i)
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k_pad[i] ^= 0x36;
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crypto_hash_sha256_init(&state);
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crypto_hash_sha256_update(&state, k_pad, crypto_hash_sha256_BYTES);
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crypto_hash_sha256_update(&state, text, text_len);
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crypto_hash_sha256_final(&state, digest);
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memset(k_pad, 0, sizeof k_pad);
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memcpy(k_pad, key, key_len);
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for (unsigned int i = 0; i < crypto_hash_sha256_BYTES; ++i)
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k_pad[i] ^= 0x5c;
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crypto_hash_sha256_init(&state);
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crypto_hash_sha256_update(&state, k_pad, crypto_hash_sha256_BYTES);
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crypto_hash_sha256_update(&state, digest, crypto_hash_sha256_BYTES);
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crypto_hash_sha256_final(&state, digest);
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}
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int pbkdf2(unsigned char (&output)[crypto_hash_sha256_BYTES],
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const unsigned char* key, size_t key_len,
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const unsigned char* salt, size_t salt_len,
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unsigned rounds)
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{
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unsigned char asalt[crypto_hash_sha256_BYTES + 4], obuf[crypto_hash_sha256_BYTES], d1[crypto_hash_sha256_BYTES], d2[crypto_hash_sha256_BYTES];
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if (rounds < 1 || key_len == 0 || salt_len == 0)
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return -1;
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if (salt_len > crypto_hash_sha256_BYTES) salt_len = crypto_hash_sha256_BYTES; // length cap for the salt
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memset(asalt, 0, salt_len);
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memcpy(asalt, salt, salt_len);
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for (unsigned count = 1; ; ++count)
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{
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asalt[salt_len + 0] = (count >> 24) & 0xff;
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asalt[salt_len + 1] = (count >> 16) & 0xff;
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asalt[salt_len + 2] = (count >> 8) & 0xff;
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asalt[salt_len + 3] = count & 0xff;
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hmac_sha256(d1, asalt, salt_len + 4, key, key_len);
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memcpy(obuf, d1, crypto_hash_sha256_BYTES);
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for (unsigned i = 1; i < rounds; i++)
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{
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hmac_sha256(d2, d1, crypto_hash_sha256_BYTES, key, key_len);
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memcpy(d1, d2, crypto_hash_sha256_BYTES);
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for (unsigned j = 0; j < crypto_hash_sha256_BYTES; j++)
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obuf[j] ^= d1[j];
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}
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memcpy(output, obuf, crypto_hash_sha256_BYTES);
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key += crypto_hash_sha256_BYTES;
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if (key_len < crypto_hash_sha256_BYTES)
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break;
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key_len -= crypto_hash_sha256_BYTES;
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};
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return 0;
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}
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