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代码如下:

'******************************************************************************

'

' this code and information is provided as is without warranty of any kind,

' either expressed or implied, including but not limited to the implied

' warranties of merchantability and/or fitness for a particular purpose.

'

' copyright (c) 1999- 2002. microsoft corporation. all rights reserved.

'

'******************************************************************************

'

' cencrypt.vbs

'

' this is a sample script to illustrate how to use the capicom's encrypteddata

' to encrypt/decrypt text file.

'

' note: for simplicity, this script does not handle exception.

'

'******************************************************************************

option explicit

const forreading = 1, forwriting = 2

' command.

const unknown = 0

const encrypt = 1

const decrypt = 2

' capicom's constants.

const capicom_encryption_algorithm_rc2 = 0

const capicom_encryption_algorithm_rc4 = 1

const capicom_encryption_algorithm_des = 2

const capicom_encryption_algorithm_3des = 3

const capicom_encryption_algorithm_aes = 4

const capicom_encryption_key_length_maximum = 0

const capicom_encryption_key_length_40_bits = 1

const capicom_encryption_key_length_56_bits = 2

const capicom_encryption_key_length_128_bits = 3

const capicom_encryption_key_length_192_bits = 4

const capicom_encryption_key_length_256_bits = 5

' command line arguments.

dim command : command = unknown

dim password : password = null

dim algorithm : algorithm = capicom_encryption_algorithm_rc2

dim keylength : keylength = capicom_encryption_key_length_maximum

dim verbose : verbose = false

dim filenames()

' first make sure the script is executed by cscript.exe.

if instr(1, ucase(wscript.fullname), cscript.exe, vbtextcompare) = 0 then

wscript.echo this script can only be executed by cscript.exe. & vbcrlf & vbcrlf &_

you can either: & vbcrlf & vbcrlf & _

1. set cscript.exe as the default (run cscript //h:cscript), or & vbcrlf & _

2. run cscript.exe directly as in, cscript & wscript.scriptname & .

wscript.quit(-1)

end if

' parse the command line.

parsecommandline

' now process the command.

select case command

case encrypt

doencryptcommand filenames, algorithm, keylength, password

case decrypt

dodecryptcommand filenames, password

end select

wscript.quit(0)

' end main

'******************************************************************************

'

' subroutine: doencryptcommand

'

' synopsis : encrypt content of text file filenames(0).

'

' parameter : filenames - array of filenames.

'

' algorithm - encryption algorithm

'

' keylength - key size.

'

' password - secret password.

'

'******************************************************************************

sub doencryptcommand (filenames, algorithm, keylength, password)

dim content

dim message

dim encrypteddata

' create the encrypteddata object.

set encrypteddata = createobject(capicom.encrypteddata)

' set algorithm, key size, and encryption password.

encrypteddata.algorithm.name = algorithm

encrypteddata.algorithm.keylength = keylength

encrypteddata.setsecret password

' display main title.

wscript.stdout.writeline encrypting text file & filenames(0) & .

wscript.stdout.writeline

' display more detail for verbose operation.

if verbose then

displaydetail encrypteddata

end if

' load content of text file to be encrypted.

loadfile filenames(0), content

' now encrypt it.

encrypteddata.content = content

message = encrypteddata.encrypt

' finally, save encrypted message to filenames(1).

savefile filenames(1), message

wscript.stdout.writeline successful - encrypted message saved to & filenames(1) & .

' free resources.

set encrypteddata = nothing

end sub ' end doencryptcommand

'******************************************************************************

'

' subroutine: dodecryptcommand

'

' synopsis : decrypt an encrypted file.

'

' parameter : filenames - array of filenames.

'

' password - secret password.

'

'******************************************************************************

sub dodecryptcommand (filenames, password)

dim message

dim encrypteddata

' create the encrypteddata object.

set encrypteddata = createobject(capicom.encrypteddata)

' set decryption password.

encrypteddata.setsecret password

' display main title.

wscript.stdout.writeline decrypting encrypted text file & filenames(0) & .

wscript.stdout.writeline

' load the encrypted message.

loadfile filenames(0), message

' now decrypt it.

encrypteddata.decrypt(message)

' display more detail for verbose operation.

if verbose then

displaydetail encrypteddata

end if

' finally, save decrypted content to filenames(1).

savefile filenames(1), encrypteddata.content

wscript.stdout.writeline successful - decrypted content saved to & filenames(1) & .

' free resources.

set encrypteddata = nothing

end sub ' end dodecryptcommand

'******************************************************************************

'

' subroutine: loadfile

'

' synopsis : read content of a text file.

'

' parameter : filename - input text filename.

'

' buffer - string buffer to receive the text file content.

'

'******************************************************************************

sub loadfile (filename, buffer)

dim fso

set fso = createobject(scripting.filesystemobject)

if not fso.fileexists(filename) then

wscript.stdout.writeline error: file & filename & not found.

wscript.quit(-5)

end if

dim ts

set ts = fso.opentextfile(filename, forreading)

buffer = ts.readall

end sub ' end loadfile

'******************************************************************************

'

' subroutine: savefile

'

' synopsis : save string to file.

'

' parameter : filename - output filename.

'

' buffer - string buffer to be saved.

'

'******************************************************************************

sub savefile (filename, buffer)

dim fso

set fso = createobject(scripting.filesystemobject)

dim ts

set ts = fso.opentextfile(filename, forwriting, true)

ts.write buffer

end sub ' end savefile

'******************************************************************************

'

' subroutine: displaydetail

'

' synopsis : display detail information.

'

' parameter : encrypteddata - encrypteddata object.

'

'******************************************************************************

sub displaydetail (encrypteddata)

dim algonames(4)

algonames(0) = rc2

algonames(1) = rc4

algonames(2) = des

algonames(3) = 3des

algonames(4) = aes

wscript.stdout.writeline algorithm : & algonames(encrypteddata.algorithm.name)

wscript.stdout.write key length:

select case encrypteddata.algorithm.keylength

case capicom_encryption_key_length_40_bits

wscript.stdout.writeline 40 bits

case capicom_encryption_key_length_56_bits

wscript.stdout.writeline 56 bits

case capicom_encryption_key_length_128_bits

wscript.stdout.writeline 128 bits

case capicom_encryption_key_length_192_bits

wscript.stdout.writeline 192 bits

case capicom_encryption_key_length_256_bits

wscript.stdout.writeline 256 bits

case else

wscript.stdout.writeline maximum

end select

wscript.stdout.writeline

end sub ' end displaydetail

'******************************************************************************

'

' subroutine: parsecommandline

'

' synopsis : parse the command line, and set the options accordingly.

'

' parameter : none

'

'******************************************************************************

sub parsecommandline

' constants for command line parsing states.

const arg_state_command = 0

const arg_state_options = 1

const arg_state_algorithm = 2

const arg_state_length = 3

const arg_state_filename = 4

const arg_state_password = 5

const arg_state_end = 6

' parse command line.

dim arg

dim argstate : argstate = arg_state_command

for each arg in wscript.arguments

select case argstate

case arg_state_command

select case ucase(arg)

case encrypt

command = encrypt

case decrypt

command = decrypt

case else

displayusage

end select

argstate = arg_state_options

case arg_state_options

select case ucase(arg)

case -alg, /alg

argstate = arg_state_algorithm

case -length, /length

argstate = arg_state_length

case -v, /v

verbose = true

case -?, /?

displayusage

case else

if left(arg, 1) = - or left(arg, 1) = / then

displayusage

else

redim filenames(0)

filenames(0) = arg

end if

argstate = arg_state_filename

end select

case arg_state_algorithm

if left(arg, 1) = - or left(arg, 1) = / then

displayusage

else

select case ucase(arg)

case rc2

algorithm = capicom_encryption_algorithm_rc2

case rc4

algorithm = capicom_encryption_algorithm_rc4

case des

algorithm = capicom_encryption_algorithm_des

case 3des

algorithm = capicom_encryption_algorithm_3des

case aes

algorithm = capicom_encryption_algorithm_aes

case else

displayusage

end select

end if

argstate = arg_state_options

case arg_state_length

if left(arg, 1) = - or left(arg, 1) = / then

displayusage

else

select case ucase(arg)

case 40

keylength = capicom_encryption_key_length_40_bits

case 56

keylength = capicom_encryption_key_length_56_bits

case 128

keylength = capicom_encryption_key_length_128_bits

case 192

keylength = capicom_encryption_key_length_192_bits

case 256

keylength = capicom_encryption_key_length_256_bits

case max

keylength = capicom_encryption_key_length_maximum

case else

displayusage

end select

end if

argstate = arg_state_options

case arg_state_filename

if left(arg, 1) = - or left(arg, 1) = / then

displayusage

else

redim preserve filenames(ubound(filenames) + 1)

filenames(ubound(filenames)) = arg

end if

argstate = arg_state_password

case arg_state_password

if left(arg, 1) = - or left(arg, 1) = / then

displayusage

else

password = arg

end if

argstate = arg_state_end

case else

wscript.stdout.writeline internal script error: unknown argument state ( & cstr(argstate) & ) encountered.

wscript.quit(-3)

end select

next

' make sure we are in good state.

if argstate <> arg_state_end then

displayusage

end if

end sub ' parsecommandline

'******************************************************************************

'

' subroutine: displayusage

'

' synopsis : display the usage screen, and then exit with a negative error

' code.

'

' parameter : none.

'

'******************************************************************************

sub displayusage

select case command

case unknown

wscript.stdout.writeline usage: cencrypt command [options] infile outfile password

wscript.stdout.writeline

wscript.stdout.writeline command:

wscript.stdout.writeline

wscript.stdout.writeline encrypt -- encrypt a text file

wscript.stdout.writeline decrypt -- decrypt an encrypted text file

wscript.stdout.writeline

wscript.stdout.writeline for help on a specific command, enter cencrypt command -?

case encrypt

wscript.stdout.writeline usage: cencrypt encrypt [options] contentfile encryptedfile password

wscript.stdout.writeline

wscript.stdout.writeline the encrypt command is used to encrypt a text file based on a secret password.

wscript.stdout.writeline encrypting protects the data from being read by others except those who know

wscript.stdout.writeline the secret password.

wscript.stdout.writeline

wscript.stdout.writeline options:

wscript.stdout.writeline

wscript.stdout.writeline -alg <algorithm> -- rc2, rc4, des, 3des, or aes (default to rc2)

wscript.stdout.writeline -length <key length> -- 40, 56, 128, 192, 256, or max (default to max,

wscript.stdout.writeline and ignored for des or 3des)

wscript.stdout.writeline -v -- verbose operation

wscript.stdout.writeline -? -- this help screen

wscript.stdout.writeline

wscript.stdout.writeline contentfile -- text file to be encrypted

wscript.stdout.writeline

wscript.stdout.writeline encryptedfile -- encrypted text file

wscript.stdout.writeline

wscript.stdout.writeline note: all non-fatal invalid options for this specific command will be ignored.

wscript.stdout.writeline

case decrypt

wscript.stdout.writeline usage: cencrypt decrypt [options] encryptedfile contentfile password

wscript.stdout.writeline

wscript.stdout.writeline the decrypt command is used to decrypt an encrypted text file.

wscript.stdout.writeline

wscript.stdout.writeline options:

wscript.stdout.writeline

wscript.stdout.writeline -v -- verbose operation

wscript.stdout.writeline -? -- this help screen

wscript.stdout.writeline

wscript.stdout.writeline encryptedfile -- encrypted text file

wscript.stdout.writeline

wscript.stdout.writeline contentfile -- decrypted text file

wscript.stdout.writeline

wscript.stdout.writeline note: all non-fatal invalid options for this specific command will be ignored.

wscript.stdout.writeline

case else

wscript.stdout.writeline internal script error: unknown help state (command = & cstr(command) & ).

wscript.quit(-2)

end select

wscript.quit(-1)

end sub ' end displayusage