UniBasic Commands Reference - Rocket Software

SIGNATURE
Syntax
SIGNATURE(algorithm, action, data, dataLoc, key, keyLoc, keyFmt, pass, sigIn,
result)
Description
The SIGNATURE() function generates a digital signature or verifies a signature
using the supplied key.
The algorithm parameter specifies the digest algorithm used to construct the
signature. UniData supports the MD5 and SHA1 algorithms. There are four actions
you can be specify: RSA-Sign, RSA-Verify, DSA-Sign, and DSA-Verify. If you
choose DSA, you can only specify SHA1 in algorithm.
The data to be signed or verified against a signature can be supplied either directly in
data, or read from a file whose names is in data.
For signing action, you should specify a private key. For verification, a public key is
usually expected. However, UniData also accepts a private key for verification
purposes. Key can be either in PEM or DER format. If a private key is password
protected, the password must be supplied with pass.
For verification, key can also contain a certificate or name of a certificate file. A
signature is expected in sigIn.
For signing action, the generated signature is put into result.
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