ECDSA verification


 
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Old 05-24-2016
ECDSA verification

Using ECDSA, how do you verify integrity of Data (D), Given the value for the following:
Random number (r)
Signature (s)
ECpublic Key (K)

Thanks.
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GnuPG::Signature(3pm)					User Contributed Perl Documentation				     GnuPG::Signature(3pm)

NAME
GnuPG::Signature - GnuPG Key Signature Objects SYNOPSIS
# assumes a GnuPG::Key or GnuPG::UserID or GnuPG::UserAttribute object in $signed my $signing_id = $signed->signatures->[0]->hex_id(); DESCRIPTION
GnuPG::Signature objects are generally not instantiated on their own, but rather as part of GnuPG::Key objects. They embody various aspects of a GnuPG signature on a key. OBJECT METHODS
new( %initialization_args ) This methods creates a new object. The optional arguments are initialization of data members. is_valid() Returns 1 if GnuPG was able to cryptographically verify the signature, otherwise 0. compare( $other ) Returns non-zero only when this Signature is identical to the other GnuPG::Signature. OBJECT DATA MEMBERS
validity A character indicating the cryptographic validity of the key. GnuPG uses at least the following characters: "!" means valid, "-" means not valid, "?" means unknown (e.g. if the supposed signing key is not present in the local keyring), and "%" means an error occurred (e.g. a non-supported algorithm). See the documentation for --check-sigs in gpg(1). algo_num The number of the algorithm used for the signature. hex_id The hex id of the signing key. user_id_string The first user id string on the key that made the signature. This may not be defined if the signing key is not on the local keyring. sig_class Signature class. This is the numeric value of the class of signature. A table of possible classes of signatures and their numeric types can be found at http://tools.ietf.org/html/rfc4880#section-5.2.1 is_exportable returns 0 for local-only signatures, non-zero for exportable signatures. date_string The formatted date the signature was performed on. date The date the signature was performed, represented as the number of seconds since midnight 1970-01-01 UTC. expiration_date_string The formatted date the signature will expire (signatures without expiration return undef). expiration_date The date the signature will expire, represented as the number of seconds since midnight 1970-01-01 UTC (signatures without expiration return undef) SEE ALSO
perl v5.12.4 2010-05-10 GnuPG::Signature(3pm)