computeMessageDigest
Compute
Description
Computes the message digests of one or more files.
Usage
computeMessageDigest(files, algorithm)
listMessageDigestAlgorithms()
Arguments
| files |
character vector specifying the file names to compute the message digests of. NAs or NULL are not allowed.
|
| algorithm |
character value specifying the name of the message digest algorithm to use. If the specified algorithm is unknown, an error will be thrown.
|
Details
These functions use OpenSSL to compute message digests of files on disk.
Value
computeMessageDigest returns a character vector containing the string representations of the calculated message digests. The names of this vector are the given filenames.
If the filename does not exist, is not a regular file, or the function encounters any failures during computation, NA will be given
as a result for that filename.
listMessageDigestAlgorithms returns a character vector containing the names of the supported message digest algorithms.
See Also
Examples
## list the supported message digest algorithms
listMessageDigestAlgorithms()
## Not run:
## equivalent to tools::md5sum(...)
computeMessageDigest(c("file1.txt", "file2.bin", "file3.doc"), "MD5")
## SHA-1
computeMessageDigest("file4.zip", "SHA1")
## End(Not run)