From 13106ac8bb95e325cf522817f91ad1f3b0fcecb0 Mon Sep 17 00:00:00 2001 From: Lars-Dominik Braun Date: Tue, 23 Nov 2010 21:59:31 +0100 Subject: Better directory layout Removed useless AUTHORS, COPYING and README files. Move manpage to contrib (it's not exactly source code). --- libpiano/src/crypt.c | 197 --------------------------------------------------- 1 file changed, 197 deletions(-) delete mode 100644 libpiano/src/crypt.c (limited to 'libpiano/src/crypt.c') diff --git a/libpiano/src/crypt.c b/libpiano/src/crypt.c deleted file mode 100644 index 8a8ad01..0000000 --- a/libpiano/src/crypt.c +++ /dev/null @@ -1,197 +0,0 @@ -/* -Copyright (c) 2008-2010 - Lars-Dominik Braun - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in -all copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -THE SOFTWARE. -*/ - -#include -#include -#include -#include -#include - -#include "crypt_key_output.h" -#include "crypt_key_input.h" -#include "piano_private.h" - -#define byteswap32(x) ((((x) >> 24) & 0x000000ff) | \ - (((x) >> 8) & 0x0000ff00) | \ - (((x) << 8) & 0x00ff0000) | \ - (((x) << 24) & 0xff000000)) - -#define hostToBigEndian32(x) htonl(x) -#define bigToHostEndian32(x) ntohl(x) - -/* decrypt hex-encoded, blowfish-crypted string: decode 2 hex-encoded blocks, - * decrypt, byteswap - * @param hex string - * @return decrypted string or NULL - */ -#define INITIAL_SHIFT 28 -#define SHIFT_DEC 4 -unsigned char *PianoDecryptString (const unsigned char *strInput) { - /* hex-decode => strlen/2 + null-byte */ - uint32_t *iDecrypt; - unsigned char *strDecrypted; - unsigned char shift = INITIAL_SHIFT, intsDecoded = 0, j; - /* blowfish blocks, 32-bit */ - uint32_t f, l, r, lrExchange; - - if ((iDecrypt = calloc (strlen ((char *) strInput)/2/sizeof (*iDecrypt)+1, - sizeof (*iDecrypt))) == NULL) { - return NULL; - } - strDecrypted = (unsigned char *) iDecrypt; - - while (*strInput != '\0') { - /* hex-decode string */ - if (*strInput >= '0' && *strInput <= '9') { - *iDecrypt |= (*strInput & 0x0f) << shift; - } else if (*strInput >= 'a' && *strInput <= 'f') { - /* 0xa (hex) = 10 (decimal), 'a' & 0x0f == 1 => +9 */ - *iDecrypt |= ((*strInput+9) & 0x0f) << shift; - } - if (shift > 0) { - shift -= SHIFT_DEC; - } else { - shift = INITIAL_SHIFT; - /* initialize next dword */ - *(++iDecrypt) = 0; - ++intsDecoded; - } - - /* two 32-bit hex-decoded boxes available => blowfish decrypt */ - if (intsDecoded == 2) { - l = *(iDecrypt-2); - r = *(iDecrypt-1); - - for (j = in_key_n + 1; j > 1; --j) { - l ^= in_key_p [j]; - - f = in_key_s [0][(l >> 24) & 0xff] + - in_key_s [1][(l >> 16) & 0xff]; - f ^= in_key_s [2][(l >> 8) & 0xff]; - f += in_key_s [3][l & 0xff]; - r ^= f; - /* exchange l & r */ - lrExchange = l; - l = r; - r = lrExchange; - } - /* exchange l & r */ - lrExchange = l; - l = r; - r = lrExchange; - r ^= in_key_p [1]; - l ^= in_key_p [0]; - - *(iDecrypt-2) = bigToHostEndian32 (l); - *(iDecrypt-1) = bigToHostEndian32 (r); - - intsDecoded = 0; - } - ++strInput; - } - - return strDecrypted; -} -#undef INITIAL_SHIFT -#undef SHIFT_DEC - -/* blowfish-encrypt/hex-encode string - * @param encrypt this - * @return encrypted, hex-encoded string - */ -unsigned char *PianoEncryptString (const unsigned char *strInput) { - const size_t strInputN = strlen ((char *) strInput); - /* num of 64-bit blocks, rounded to next block */ - size_t blockN = strInputN / 8 + 1; - uint32_t *blockInput, *blockPtr; - /* output string */ - unsigned char *strHex, *hexPtr; - const char *hexmap = "0123456789abcdef"; - - if ((blockInput = calloc (blockN*2, sizeof (*blockInput))) == NULL) { - return NULL; - } - blockPtr = blockInput; - - if ((strHex = calloc (blockN*8*2 + 1, sizeof (*strHex))) == NULL) { - return NULL; - } - hexPtr = strHex; - - memcpy (blockInput, strInput, strInputN); - - while (blockN > 0) { - /* encryption blocks */ - uint32_t f, lrExchange; - register uint32_t l, r; - int i; - - l = hostToBigEndian32 (*blockPtr); - r = hostToBigEndian32 (*(blockPtr+1)); - - /* encrypt blocks */ - for (i = 0; i < out_key_n; i++) { - l ^= out_key_p[i]; - - f = out_key_s[0][(l >> 24) & 0xff] + - out_key_s[1][(l >> 16) & 0xff]; - f ^= out_key_s[2][(l >> 8) & 0xff]; - f += out_key_s[3][l & 0xff]; - r ^= f; - /* exchange l & r */ - lrExchange = l; - l = r; - r = lrExchange; - } - /* exchange l & r again */ - lrExchange = l; - l = r; - r = lrExchange; - r ^= out_key_p [out_key_n]; - l ^= out_key_p [out_key_n+1]; - - /* swap bytes again... */ - l = byteswap32 (l); - r = byteswap32 (r); - - /* hex-encode encrypted blocks */ - for (i = 0; i < 4; i++) { - *hexPtr++ = hexmap[(l & 0xf0) >> 4]; - *hexPtr++ = hexmap[l & 0x0f]; - l >>= 8; - } - for (i = 0; i < 4; i++) { - *hexPtr++ = hexmap[(r & 0xf0) >> 4]; - *hexPtr++ = hexmap[r & 0x0f]; - r >>= 8; - } - - /* two! 32-bit blocks encrypted (l & r) */ - blockPtr += 2; - --blockN; - } - - free (blockInput); - - return strHex; -} -- cgit v1.2.3