75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
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/****************************************************************
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* *
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* Copyright 2009 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "gtm_string.h"
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#include "gtm_stdio.h"
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#include "gdsroot.h"
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#include "gdsbt.h"
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#include "gtm_facility.h"
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#include "fileinfo.h"
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#include "gdsfhead.h"
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#include "filestruct.h"
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#include "jnl.h"
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#include "util.h"
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#include "gtmio.h"
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#include "gtmcrypt.h"
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#include "mu_decrypt.h"
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#define WITHIN_PRINTABLE_RANGE(c) (31 < (unsigned char)c && 127 > (unsigned char)c)
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/* Given a file (journal or database), the function extracts the buffer of the given length at the given offset and displays it
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* on the STDIN. Note that, the offset and length should match the values at the encryption time. In case of journal files,
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* this offset could be obtained for every record using a detailed journal extract. */
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int mu_decrypt(char *fname, uint4 off, uint4 len)
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{
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# ifdef GTM_CRYPT
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int fd, n_len, save_errno, status, i;
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char hash[GTMCRYPT_HASH_LEN], *buff;
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boolean_t is_encrypted;
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gtmcrypt_key_t key_handle;
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assert(fname);
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assert(STRLEN(fname));
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n_len = STRLEN(fname);
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GET_FD_HASH(fname, n_len, fd, hash, is_encrypted);
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buff = (char *)malloc(len);
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LSEEKREAD(fd, off, buff, len, save_errno);
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if (0 != save_errno)
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{
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close(fd);
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GC_DISPLAY_FILE_ERROR_AND_RETURN("Error reading from file !AD", fname, n_len, save_errno);
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}
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if (is_encrypted)
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{
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INIT_PROC_ENCRYPTION(status);
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GTMCRYPT_GETKEY(hash, key_handle, status);
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if (0 == status)
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GTMCRYPT_DECODE_FAST(key_handle, buff, len, NULL, status);
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if (0 != status)
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{
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close(fd);
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free(buff);
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GC_RTS_ERROR(status, fname);
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}
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}
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for (i = 0; i < len; i++)
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{
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if (WITHIN_PRINTABLE_RANGE(buff[i]))
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PRINTF("%c", buff[i]);
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else
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PRINTF("%c", '.');
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}
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free(buff);
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close(fd);
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#endif
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return SS_NORMAL;
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}
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