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For more information on the SHA algorithm and pseudocode, visit the Wikipedia article
Code snippets[]
C#[]
The following is an example of an SHA checksum in C# (using the System.Security.Cryptography namespace).
public class SHA1Test { public static byte[] Compute(byte[] input) { // Initialize the engine SHA1 engine = new SHA1CryptoServiceProvider(); // Compute the hash byte[] hash = engine.ComputeHash(input); // Return the result return hash; } }
MSDN documentation for the SHA1CryptoServiceProvider class
Java[]
The following is an example of an SHA checksum in Java. Java Code Examples
import java.security.MessageDigest; public static String SHAsum(byte[] convertme) { MessageDigest md = MessageDigest.getInstance("SHA-1"); //This could also be SHA1withDSA, no exception handling return new String(md.digest(convertme)); }
Java Cryptography Architecture
Perl[]
The following is an example of an SHA checksum in Perl.
# Functional style Perl 5.6.x or earlier use Digest::file qw(digest_file_base64); my $full_filename='c:/yourpath/yourfile.ext'; # on Linux # my $full_filename='c:\\yourpath\\yourfile.ext'; # on Windows my $digest=''; $digest = digest_file_base64( $file, 'SHA1' ) unless -d $file; # skip directories! __END__
# Functional style Perl 5.8.x or later use Digest::SHA1 qw(sha1 sha1_hex sha1_base64); $digest = sha1($data); $digest = sha1_hex($data); $digest = sha1_base64($data); $digest = sha1_transform($data);
PHP[]
The following is an example of an SHA checksum in PHP.
$digest = sha1($data);
$digest = hash('sha1',$data);
Note that hash() is available in PHP 5 and above.
Python[]
The following is an example of an SHA checksum in Python.
import hashlib converted = hashlib.sha1("My text").hexdigest()
Tcl[]
The following is an example of a SHA1 checksum using Tcl.
package require sha1 set digest [sha1::sha1 -hex "My text"]