Ruby

Load EC Public Key from X,Y Values

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Demonstrates how to load an EC public key from X and Y values. Ruby

require 'chilkat'

success = false

# We have the following x and y values in base64 (for an EC point on the P-256 curve).
x = "Dn7uB1O7kgk74G6qfQwFJESeDnxO6lLjGZFWZJE16tw"
y = "iOWA5DInzK6nuUGvHJbMVq1Dpj248FqSV2teN3HzmhU"

# Build a JWK that looks like this:

# {
#   "kty": "EC",
#   "crv": "P-256",
#   "x": "Dn7uB1O7kgk74G6qfQwFJESeDnxO6lLjGZFWZJE16tw",
#   "y": "iOWA5DInzK6nuUGvHJbMVq1Dpj248FqSV2teN3HzmhU"
# }

json = Chilkat::CkJsonObject.new()
json.UpdateString("kty","EC")
json.UpdateString("crv","P-256")
json.UpdateString("x",x)
json.UpdateString("y",y)

# Load from the JWK.
pubkey = Chilkat::CkPublicKey.new()
success = pubkey.LoadFromString(json.emit())
if (success == false)
    print pubkey.lastErrorText() + "\n";
    exit
end

print "Success." + "\n";