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Diffstat (limited to 'plugins/FTPFileYM/src/zip/crypt.h')
| -rw-r--r-- | plugins/FTPFileYM/src/zip/crypt.h | 131 | 
1 files changed, 0 insertions, 131 deletions
diff --git a/plugins/FTPFileYM/src/zip/crypt.h b/plugins/FTPFileYM/src/zip/crypt.h deleted file mode 100644 index a01d08d932..0000000000 --- a/plugins/FTPFileYM/src/zip/crypt.h +++ /dev/null @@ -1,131 +0,0 @@ -/* crypt.h -- base code for crypt/uncrypt ZIPfile - - -   Version 1.01e, February 12th, 2005 - -   Copyright (C) 1998-2005 Gilles Vollant - -   This code is a modified version of crypting code in Infozip distribution - -   The encryption/decryption parts of this source code (as opposed to the -   non-echoing password parts) were originally written in Europe.  The -   whole source package can be freely distributed, including from the USA. -   (Prior to January 2000, re-export from the US was a violation of US law.) - -   This encryption code is a direct transcription of the algorithm from -   Roger Schlafly, described by Phil Katz in the file appnote.txt.  This -   file (appnote.txt) is distributed with the PKZIP program (even in the -   version without encryption capabilities). - -   If you don't need crypting in your application, just define symbols -   NOCRYPT and NOUNCRYPT. - -   This code support the "Traditional PKWARE Encryption". - -   The new AES encryption added on Zip format by Winzip (see the page -   http://www.winzip.com/aes_info.htm ) and PKWare PKZip 5.x Strong -   Encryption is not supported. -*/ - -#define CRC32(c, b) ((*(pcrc_32_tab+(((int)(c) ^ (b)) & 0xff))) ^ ((c) >> 8)) - -/*********************************************************************** - * Return the next byte in the pseudo-random sequence - */ -static int decrypt_byte(unsigned long* pkeys, const unsigned long* pcrc_32_tab) -{ -    unsigned temp;  /* POTENTIAL BUG:  temp*(temp^1) may overflow in an -                     * unpredictable manner on 16-bit systems; not a problem -                     * with any known compiler so far, though */ - -    temp = ((unsigned)(*(pkeys+2)) & 0xffff) | 2; -    return (int)(((temp * (temp ^ 1)) >> 8) & 0xff); -} - -/*********************************************************************** - * Update the encryption keys with the next byte of plain text - */ -static int update_keys(unsigned long* pkeys,const unsigned long* pcrc_32_tab,int c) -{ -    (*(pkeys+0)) = CRC32((*(pkeys+0)), c); -    (*(pkeys+1)) += (*(pkeys+0)) & 0xff; -    (*(pkeys+1)) = (*(pkeys+1)) * 134775813L + 1; -    { -      register int keyshift = (int)((*(pkeys+1)) >> 24); -      (*(pkeys+2)) = CRC32((*(pkeys+2)), keyshift); -    } -    return c; -} - - -/*********************************************************************** - * Initialize the encryption keys and the random header according to - * the given password. - */ -static void init_keys(const char* passwd,unsigned long* pkeys,const unsigned long* pcrc_32_tab) -{ -    *(pkeys+0) = 305419896L; -    *(pkeys+1) = 591751049L; -    *(pkeys+2) = 878082192L; -    while (*passwd != '\0') { -        update_keys(pkeys,pcrc_32_tab,(int)*passwd); -        passwd++; -    } -} - -#define zdecode(pkeys,pcrc_32_tab,c) \ -    (update_keys(pkeys,pcrc_32_tab,c ^= decrypt_byte(pkeys,pcrc_32_tab))) - -#define zencode(pkeys,pcrc_32_tab,c,t) \ -    (t=decrypt_byte(pkeys,pcrc_32_tab), update_keys(pkeys,pcrc_32_tab,c), t^(c)) - -#ifdef INCLUDECRYPTINGCODE_IFCRYPTALLOWED - -#define RAND_HEAD_LEN  12 -   /* "last resort" source for second part of crypt seed pattern */ -#  ifndef ZCR_SEED2 -#    define ZCR_SEED2 3141592654UL     /* use PI as default pattern */ -#  endif - -static int crypthead(const char* passwd,      /* password string */ -                     unsigned char* buf,      /* where to write header */ -                     int bufSize, -                     unsigned long* pkeys, -                     const unsigned long* pcrc_32_tab, -                     unsigned long crcForCrypting) -{ -    int n;                       /* index in random header */ -    int t;                       /* temporary */ -    int c;                       /* random byte */ -    unsigned char header[RAND_HEAD_LEN-2]; /* random header */ -    static unsigned calls = 0;   /* ensure different random header each time */ - -    if (bufSize<RAND_HEAD_LEN) -      return 0; - -    /* First generate RAND_HEAD_LEN-2 random bytes. We encrypt the -     * output of rand() to get less predictability, since rand() is -     * often poorly implemented. -     */ -    if (++calls == 1) -    { -        srand((unsigned)(time(NULL) ^ ZCR_SEED2)); -    } -    init_keys(passwd, pkeys, pcrc_32_tab); -    for (n = 0; n < RAND_HEAD_LEN-2; n++) -    { -        c = (rand() >> 7) & 0xff; -        header[n] = (unsigned char)zencode(pkeys, pcrc_32_tab, c, t); -    } -    /* Encrypt random header (last two bytes is high word of crc) */ -    init_keys(passwd, pkeys, pcrc_32_tab); -    for (n = 0; n < RAND_HEAD_LEN-2; n++) -    { -        buf[n] = (unsigned char)zencode(pkeys, pcrc_32_tab, header[n], t); -    } -    buf[n++] = (unsigned char)zencode(pkeys, pcrc_32_tab, (int)(crcForCrypting >> 16) & 0xff, t); -    buf[n++] = (unsigned char)zencode(pkeys, pcrc_32_tab, (int)(crcForCrypting >> 24) & 0xff, t); -    return n; -} - -#endif  | 
