Network Security with OpenSSL

Name

dgst

Synopsis

The dgst command is used to compute the hash of a block of data using a message digest algorithm. It can also be used to sign data and verify signatures.

Options

-dss1, -md2, -md4, -md5, -mdc2, -rmd160, -sha, -sha1

Specify the message digest algorithm to use. If this option is omitted, the default is to use MD5.

-out filename

Specify the name of a file to write the results from the command to. If this option is omitted, stdout is used.

-hex

Cause the output to be written in hexadecimal format. When computing a hash, this is the default.

-c

Cause the hexadecimal output to be grouped by two digits, each group separated by a colon. This option is ignored if the output format is not hexadecimal.

-binary

Cause the output to be written in binary format. When signing, this is the default.

-rand filename

Specify the name of a file or files to use to seed the pseudorandom number generator. This option uses the format described in Chapter 2.

-sign filename

Sign the contents of the specified file. The hash value of the data computed using the specified message digest algorithm is actually the only data that is signed.

-verify filename

Verify a signature using the public key contained in the specified file.

-prverify filename

Verify a signature using the private key contained in the specified file.

-signature

Specify the name of a file containing the signature to be verified. This option is ignored unless used with the verify or prverify options.

Notes

Any arguments ...