dgst(1ssl) — Commands

NAME

dgst, md5, md4, md2, sha1, sha, mdc2, ripemd160 − Message digests

SYNOPSIS

openssl dgst [−md5 | −md4 | −md2 |−sha1 | −sha | −mdc2 | −ripemd160 | −dss1] [−c] [−d] [−hex] [−binary] [−out filename] [−sign filename] [−verify filename] [−prverify filename] [−signature filename] [file..]

[−md5 | −md4 | −md2 | −sha1 | −sha | −mdc2 | −ripemd160] [−c] [−d] [file...]

OPTIONS

−cPrints out the digest in two digit groups separated by colons, only relevant if hex format output is used.

−dPrints out BIO debugging information.

−hexDigest is to be output as a hex dump. This is the default case for a typical digest as opposed to a digital signature.

−binary
Outputs the digest or signature in binary form.

−out filename
Filename to output to, or standard output by default.

−sign filename
Digitally signs the digest using the private key in filename.

−verifyfilename
Verifies the signature using the public key in filename. The output is either Verification OK or Verification Failure.

−prverify filename
Verifies the signature using the private key in filename.

−signature filename
The actual signature to verify.

−rand file(s)
A file or files containing random data used to seed the random number generator, or an EGD socket. (See RAND_egd(3).) Multiple files can be specified separated by an OS-dependent character. The separator is a semicolon (;) for MS-Windows, a comma (,) for OpenVMS, and a colon (:) for all others.

file...File or files to digest. If no files are specified then standard input is used.

DESCRIPTION

The digest functions output the message digest of a supplied file or files in hexadecimal form. They can also be used for digital signing and verification.

NOTES

The digest of choice for all new applications is SHA1. However, other digests are still widely used.

If you wish to sign or verify data using the DSA algorithm then the dss1 digest must be used.

A source of random numbers is required for certain signing algorithms, in particular DSA.