HASH Generate a Message Authentication Code.
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Syntax: |
HASH |
[ file name ] [ variable ] [ /options ] |
Arguments: |
[ input source ] |
A variable or string to specify the file name to read or in memory string data to hash |
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[ variable ] |
A variable to store resulting Message Authentication Code; The variable is created if it did not previously exist. |
Options: |
/hashstring |
Treat the input source as raw data rather than as a file to read from. |
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/type=xx |
The hash algorithm to be used. This must be one of md5, crc, sha1, sha256, sha384, sha512. The default is md5. |
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/encoding=[hex|base64] |
This specifies the output encoding for the generated hash. The default is hex and should not be changed unless you are sure you need base64. |
This script command generates a Message Authentication Code. This code can be used to verify data has not been altered. If the hash for a file changes then the contents of the file changed. Some servers have signature files of the form <filename>.md5 or <filename>.sha1 for <filename> that allow you to verify the copy of the file you have has not been altered.
RCVFILE %sitefile
SET hashfile = %sitefile & ".md5"
RCVFILE hashfile
READFILE hashfile realhash
HASH %sitefile genhash
IFNSTRCMPI realhash genhash GOTO file_altered