# nginx.conf:

    lua_package_path "/path/to/lua-resty-ecdsa/lib/?.lua;;";

    server {
        location = /test {
            content_by_lua_file conf/test.lua;
        }
    }

    -- conf/test.lua:
    local cjson = require "cjson"
    local ec =require "resty.ecdsa"

    local suported_nids = ec:get_curves_id()
    ngx.say(cjson.encode(suported_nids))

    local pub, pri, err = ec:generate_ec_keys(415)
    if not pub then
        ngx.say('generate ec keys err: ', err)
    end

    ngx.say(pub)

    --[[
    -----BEGIN PUBLIC KEY-----
    MIIBSzCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAABAAAA
    AAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA////
    ///////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMVAMSd
    NgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg9KE5
    RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8AAAAA
    //////////+85vqtpxeehPO5ysL8YyVRAgEBA0IABHzFqWQ2vI78DuGJ0CWYR2CH
    tQfN6+6lixGBoetXl36Dlyu2P55Ni7uTd5iW9aUxPHhcIHg6oUR1+LyLuxcH5xI=
    -----END PUBLIC KEY-----
    ]]

    ngx.say(pri)
    --[[
    -----BEGIN PRIVATE KEY-----
    MIIBeQIBADCCAQMGByqGSM49AgEwgfcCAQEwLAYHKoZIzj0BAQIhAP////8AAAAB
    AAAAAAAAAAAAAAAA////////////////MFsEIP////8AAAABAAAAAAAAAAAAAAAA
    ///////////////8BCBaxjXYqjqT57PrvVV2mIa8ZR0GsMxTsPY7zjw+J9JgSwMV
    AMSdNgiG5wSTamZ44ROdJreBn36QBEEEaxfR8uEsQkf4vOblY6RA8ncDfYEt6zOg
    9KE5RdiYwpZP40Li/hp/m47n60p8D54WK84zV2sxXs7LtkBoN79R9QIhAP////8A
    AAAA//////////+85vqtpxeehPO5ysL8YyVRAgEBBG0wawIBAQQgqwUV1ZBm6a8C
    z9TlUJc2f/RWJJnbXdeoV/Tnf4bVIgahRANCAAR8xalkNryO/A7hidAlmEdgh7UH
    zevupYsRgaHrV5d+g5crtj+eTYu7k3eYlvWlMTx4XCB4OqFEdfi8i7sXB+cS
    -----END PRIVATE KEY-----
    ]]
    
    local public, err = ec:new({public_key = pub})
    if not public then
        ngx.say('new ec err: ', err)
        return ngx.exit(500)
    end

    local private, err = ec:new({private_key = pri})
    if not private then
        ngx.say('new ec err: ', err)
        return ngx.exit(500)
    end

    local sig, err = private:sign("hello")
    if err then
        ngx.say('sign with ec err: ', err)
        return ngx.exit(500)    
    end
    
    local flag, err = public:verify("hello", sig)
    if err then
        ngx.say('verify with ec err: ', err)
        return ngx.exit(500)    
    end

    ngx.say(flag)

    local ec = require "resty.ecdsa"