dgst, md5, md4, md2, sha1, sha, mdc2, ripemd160 - message digests
] [ -c
] [ -hex
] [ -binary
] [ -hmac arg
] [ -out filename
] [ -sign filename
] [ -passin arg
] [ -verify filename
] [ -signature filename
] [ -hmac key
] [ -c
] [ -d
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.
- print out the digest in two digit groups separated by
colons, only relevant if hex format output is used.
- print out BIO debugging information.
- digest is to be output as a hex dump. This is the default
case for a "normal" digest as opposed to a digital
- output the digest or signature in binary form.
- -hmac arg
- set the HMAC key to "arg".
- allow use of non FIPS digest.
- -out filename
- filename to output to, or standard output by default.
- -sign filename
- digitally sign the digest using the private key in
- -keyform arg
- Specifies the key format to sign digest with. Only PEM and
ENGINE formats are supported by the dgst command.
- -engine id
- Use engine id for operations (including private key
storage). This engine is not used as source for digest algorithms, unless
it is also specified in the configuration file.
- -sigopt nm:v
- Pass options to the signature algorithm during sign or
verify operations. Names and values of these options are
- -passin arg
- the private key password source. For more information about
the format of arg see the PASS PHRASE ARGUMENTS section in
- -verify filename
- verify the signature using the the public key in
"filename". The output is either "Verification OK" or
- -prverify filename
- verify the signature using the the private key in
- -signature filename
- the actual signature to verify.
- -hmac key
- create a hashed MAC using "key".
- -mac alg
- create MAC (keyed Message Authentication Code). The most
popular MAC algorithm is HMAC (hash-based MAC), but there are other MAC
algorithms which are not based on hash, for instance gost-mac
algorithm, supported by ccgost engine. MAC keys and other options
should be set via -macopt parameter.
- -macopt nm:v
- Passes options to MAC algorithm, specified by -mac
key. Following options are supported by both by HMAC and
- Specifies MAC key as alphnumeric string (use if key contain
printable characters only). String length must conform to any restrictions
of the MAC algorithm for example exactly 32 chars for gost-mac.
- Specifies MAC key in hexadecimal form (two hex digits per
byte). Key length must conform to any restrictions of the MAC algorithm
for example exactly 32 chars for gost-mac.
- -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 a OS-dependent character. The
separator is ; for MS-Windows, , for OpenVMS, and :
for all others.
- file or files to digest. If no files are specified then
standard input is used.
The digest of choice for all new applications is SHA1. Other digests are however
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
The signing and verify options should only be used if a single file is being
signed or verified.