SSL_connect returned=1 errno=0 state=error: certificate verify failed (unable to get local issuer certificate)

Question

I am trying to post to a web service from my app and I am getting the following error frequently.

SSL_connect returned=1 errno=0 state=error: certificate ver         


        

Answer 1

After lots of testing, I found the correct solution. The problem was with the cert file declaration.

I tried sending the post request using the bundled cert files (example.com.pem)

http.ca_file = File.read(File.join(Rails.root, "/crt/example.com.pem"))

So, I changed the above declaration with the each crt and key files

http.cert = OpenSSL::X509::Certificate.new(File.read(File.join(Rails.root, "/crt/example.com.crt")))
http.key = OpenSSL::PKey::RSA.new(File.read(File.join(Rails.root, "/crt/example.com.key")))
req = Net::HTTP::Post.new(uri.path, initheader = {'Content-Type' =>'application/xml'}).

It now worked.

Complete code

uri = URI("https://test.compassplus.com:8444/Exec")
xml = "
<TKKPG>
    <Request>
    <Operation>CreateOrder</Operation> 
    <Language></Language>
    <Order>
        <OrderType>Purchase</OrderType>
        <Merchant>99999</Merchant>
        <Amount>10000</Amount>
        <Currency>524</Currency>
        <Description>Tour Purchase</Description>
        <ApproveURL>/approve.html</ApproveURL>
        <CancelURL>/cancel.html</CancelURL>
        <DeclineURL></DeclineURL>
        <email></email>
        <phone></phone>
        <AddParams>
            <FA-DATA></FA-DATA>
            <SenderPostalCode></SenderPostalCode>
            <AcctType></AcctType> 
            <TranAddendums></TranAddendums> 
            <TranAddendumsVISA></TranAddendumsVISA> 
            <TranAddendumsMC></TranAddendumsMC> 
            <TranAddendumsAMEX></TranAddendumsAMEX> 
            <TranAddendumsJCB></TranAddendumsJCB> 
            <OrderExpirationPeriod></OrderExpirationPeriod> 
            <OrigAmount></OrigAmount> 
            <OrigCurrency></OrigCurrency>
        </AddParams>
        <Fee></Fee> 
    </Order>
    </Request>
</TKKPG>
"
http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl  = true
http.ssl_version = :TLSv1_2
http.cert = OpenSSL::X509::Certificate.new(File.read(File.join(Rails.root, "/crt/example.com.crt")))
http.key = OpenSSL::PKey::RSA.new(File.read(File.join(Rails.root, "/crt/example.com.key")))
req = Net::HTTP::Post.new(uri.path, initheader = {'Content-Type' =>'application/xml'})
@res = http.request(req, xml)

Reference.

HTTP library for Ruby with HTTPS, SSL Client Certificate and Keep-Alive support?