CertUtil | How CertUtil -verifykeys works internally? - cryptography

I have a CA certificate in Local Machine Certificate Store.
When I run this command - enter code here
certutil -verifyKeys gives Key "KEYNAME" verifies as the public key for Certificate "KEYNAME" V0.0
Signature test FAILED
CertUtil: -verifykeys command FAILED: 0x80070057
(WIN32: 87 ERROR_INVALID_PARAMETER)
CertUtil: The parameter is incorrect
MSDN says certutil -verifykeys - Verify public/private key set.
I was just wondering how it verifies these keys ?
Eager to know the internal working of this command.

It performs an signing operation using the registered provider and then tries to verify the signed text using the public key stored in the certificate.
Since i was using my own custom provider thus i saw a signing request falling on my provider, but no verification request. Thus i conclude that it performs signing using the registered provider but for verification it uses it own provider i.e microsoft own cng provider.

Related

Missing extended key usage in Signserver but it is marked and critical during enrollment in EJBCA

I am trying to use EJBCA enrolled certificate in signserver. There is some problem during usage it in timestamping. It gives this error using command signserver getstatus brief all
Errors:
- Missing extended key usage timeStamping
- The extended key usage extension must be present and marked as critical
Although when I checked certificate profile timestamping extended key usage is marked and critical. Is there any way that I could enroll with timestamping?
OS version: Windows Server 2016
Java: OpenJDK 8.0.242.08
Ant: ant 1.9.14
Database: MariaDB 10.4.12
Server: Wildfly 10.1.0
Signserver: 5.2.0
EJBCA: Community 6.15.2.6
https://pastebin.com/bkpNBvc1
The most likely cause is that the certificate that you import into SignServer wasn't issued using the specified profile from EJBCA, so it is missing the extended key usage you have specified. Make sure that your certificate is issued using your profile, and verify the results with for example "openssl x509 -in cert.pem -text" that the certificate really has the key usage.
This error persisted because I used one CN and Alias (or Friendly Name for OpenSSL) For issuer and subject. As it seems it was using the issuer certificate which obviously doesn't have timestamping extended key usage and was giving same Missing extended key usage timeStamping error despite all the previous tries.

WinRm - Cannot create a WinRM listener on HTTPS due to incorrect SSL certificate

I want to use WinRM with https transport. I've bought a Comodo certificate (the error states I cannot use a self-signed certificate) with the Subject matching my FQDN (Full computer name in System) of my Windows 10 computer (not domain joined):
CN = my.domain.net
OU = PositiveSSL
OU = Domain Control Validated
When trying to create a https listener with the following command:
WinRm quickconfig -transport:https
I get the error message:
Error number: -2144108267 0x80338115
Cannot create a WinRM listener on HTTPS because this machine does not have an appropriate certificate. To be used for SSL, a certificate must have a CN matching the hostname, be appropriate for Server Authentication, and not be expired, revoked, or self-signed.
I've installed (doubleclick the *.crt file) the certificate in several stores (local machine / personal and Trusted Root Certification Authorities) but WinRM fails to create the https listener. The http listener is working OK.
Some extra info: When using certreq to try to install the *.cer certificate, I get the error:
Element not found. 0x80070490 (WIN32: 1168 ERROR_NOT_FOUND)
How do I get WinRM working with https?
Here is how I solved this issue:
create a SSL CSR using DigiCert Certificate Utility for Windows from digicert.com
use the generate CSR to request a certificate. I used versio.nl but I'll guess there are a lot of CA's out there
Install the certificate by double clicking it
go to the certificate manager for user
rightclick the certificate (it should me in the personal store) and export it
- follow the wizard and be sure to export the private key
install the newly exported certificate (mark the key as exportable and include all extended properties) in the local computer certificate store
Open an console (cmd) with administrator privilidges and type:
winrm create winrm/config/Listener?Address=*+Transport=HTTPS 
#{Hostname="server.fqdn";CertificateThumbprint="YOURCERTIFICATETHUMPPRINT"}
This worked for me. Some things to check if it is not working:
is the certificate still valid (check the date range)
check if the certificate property 'Subject" has a CN value with the FQDN of your computer
check if the listener is installed (winrm e winrm/config/listener)
I took me a lot of hours to figure this out. I hope it will help some of you out there.
I also experienced this issue - the answer from RHAD was partially helpful, but I needed to use an entirely internally generated CA.
The problem was caused by the Key algorithm I had chosen. Using the same configuration, only changing the key it works:
Failed key: elliptic curve cryptography with the brainpoolP512t1 curve (in the certificate this showed as: Public Key Algorithm: id-ecPublicKey / ASN1 OID: brainpoolP512t1 )
Successful key: an RSA key: (in the certificate: RSA Public-Key: (4096 bit))
Hopefully this helps others with similar issues.

PJSIP TLS verify error (PJSIP_TLS_ECERTVERIF)

I have recently started to develop a tiny SIP softphone application using the PJ Project and GTK+. My main goal was to create a softphone which supports both TLS and SRTP encryption (and MWI). However I have got stuck right at the part where the library registers an account because the application has failed to verify the server when I asked it for it.
I thought that I misunderstood something while I was coding as I'm a newbie but today I've just tested the library using the PJSUA application which was attached in the source code and it could register my SIP account unless I've started the program with the --tls-verify-server flag.
To make it clear I've created for Asterisk my own certificate authority, keys and certificate and I've installed the CA to my machine.
I must note that this setup works with a commercial software, it can verify the certificate without any problem.
The PJSUA flags I've used:
--use-tls
--tls-ca-file /etc/ssl/certs/ca-certificates.crt
--id=sip:u-kuklinistvan1#kingdom.info.tm;transport=tls
--registrar=sip:kingdom.info.tm;transport=tls
--realm=kingdom.info.tm
--username=u-kuklinistvan1
--password=xxxxxx
--use-srtp=2
--mwi
--tls-verify-server
It says(please follow the link for the long version):
19:21:44.728 pjsua_app.c TLS cert verification result of [94.21.11.229:5061] : The server identity does not match to any identities specified in the certificate
...which could not be true as OpenSSL itself accepts the certificate:
openssl s_client -CAfile /etc/ssl/certs/ca-certificates.crt -connect kingdom.info.tm:5061
(click here for the rest)
Verify return code: 0 (ok)
Extra information
I connect PJSUA as endpoint to registrar by hostname kingdom.info.tm.
Is it possible that I've encountered a bug or I just don't understand something?
Thank you for your help!
... does not match to any identities specified in the certificate
... which could be not true as OpenSSL itself accepts the certificate: ... openssl s_client ...
The error messages refers to checking the identity against the certificate, i.e. the hostname you provide against the names in the certificate (subject alternative names, common name). openssl s_client does not do any identity checks but only checks for a valid trust chain.
Looking at the certificate provided by the server it actually contains contain a common name for kingdom.info.tm. But from the error message it looks that it expects the IP address: TLS cert verification result of [94.21.11.229:5061]: .... Did you specify the SIP URL of the peer with an IP address?

SSL Certificate add failed when binding to port

I created a WebService using WCF. I'm doing self hosting and I want to enable HTTPS. From my understanding for this to happen, I need to create a certificate and bind to the port that I want to use.
Here are the steps that I've done to handle this:
Created a Certificate on my local machine to act as the Root Certificate Authority
makecert -n "CN=My Root Certificate Authority" -r -sv RootCATest.pvk RootCATest.cer
Opened MMC.exe and imported the saved .cer file into the "Trusted Root Certificate\Certificates\ folder
makecert -sk MyKeyName -iv RootCATest.pvk -n "CN=MyMachineName" -ic RootCATest.cer -sr localmachine -ss my -sky exchange -pe MyMachineName.cer
Created a temporary service certificate from the signed Root Certificate Authority
makecert -sk MyKeyName -iv RootCATest.pvk -n "CN=MyMachineName" -ic RootCATest.cer -sr localmachine -ss my -sky exchange -pe MyMachineName.cer
Tried to Bind the Certificate to the Port number (443 in this case)
netsh http add sslcert ipport=0.0.0.0:443 certhash=2c5ba85bcbca412a74fece02878a44b285c63981 appid={646937c0-1042-4e81-a3b6-47d678d68ba9}
The result from step 4 is the following error:
SSL Certificate add failed, Error 1312
A specified logon session does not exist. It may already have been terminated.
Does anyone have a clue why I might be getting this error?
I had the same error. The first time it occurred, as Micheal said, I had to move the certificate under Certificates(Local Computer) -->Personal -->Certificate folder. I had the same error when I imported the same certificate on another machine. The reason was that I was using certmgr.msc to import the certificate. . The window opened thus shows “Certificates – Current User”. Certificates imported using this window cause netsh to fail with the 1312 error. Make sure to use certificate snap-in in MMC to import certificates. The certificate snap-in from MMC shows “Certificates (Local Computer)”. This lets the netsh execution sail through.
SSL Certificate add failed, Error 1312
A specified logon session does not exist. It may already have been terminated.
I used to have the exact same problem and spent a couple days trying to figure out what the reason was.
To make the long story short: the problem is that you have installed the certificate on the winrm server that does not have PRIVATE KEY.
I have checked this several times. You have to delete your certificate and rebuild it by using makecert for instance, as it is described perfectly here: http://blogs.technet.com/b/jhoward/archive/2005/02/02/365323.aspx
You can easily check if your certificate has private a key as so: mmc - certificates - local machine - personal. Look at the icon of the certificate - it MUST have key sign on the icon.
I have bought an official Thawte certificate to secure a self hosted (console application) web service over a specific port on our internet server.
I then have received the Thawte certificate and installed it with mmc on our Internet server (the certificate then was viewable under „Trusted Root Certification Authorities“ (with the key icon on the image, what shows that the certificate contains a private key what is mandatory to be able to bind it to a port b.t.w.) .
Next step was to enable the <port> for https:
netsh http add urlacl url=https://+:<port>/ user=everyone
(what was no problem)
Next step was to enable the port () for https:
netsh http add sslcert ipport=0.0.0.0:<port> certhash=<thumbprint to certificate> appid={<guid to application>}
This has failed with the error message:
SSL Certificate add failed, Error: 1312 A specified logon session does not exists. It may be already have been terminated.
I then have searched the Internet and tried various suggested workaround’s (without success).
The solution for my case was to add certstorename=Root to the netsh command:
netsh http add sslcert ipport=0.0.0.0:<port *1)> certstorename=Root certhash=<thumbprint to certificate *2)> appid={<guid to application *3)>}
Notes:
If no certstorename is applied to net netsh command, netsh takes the default, what is MY (what targets the certificate store: “Personal” where self signed certificates are stored normally).
Root targets the certificate store: „Trusted Root Certification Authorities“
*1): The port, you want to use the connection
*2): You can extract the thumbprint to the certificate, if you open the certificate (on a windows system, just doubleclick the certificate in explorer) - select tab “Details” and click on “Thumbprint”. The “thumbprint” then is showed and can be copied. Copy the Thumbprint and remove all spaces...
*3): As appid you can take any ID in the form {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} as the APPID is only informative.
With the command “netsh http show sslcert” you can query the bound certificates on the whole machine and the will see informative, which appid is bound to which certificate (not really helpful in practice b.t.w.)
In my case, I have took the (from VS generated) GUID to my web service application
I had been dealing with this issue and I'm using a self-hosted WCF service. I just made the breakthrough:
I had a certificate in the personnel folder for the Machine store. It expired and my manager issued a new one. The new one failed for me with this error. I tried a lot of stuff from Google but in the end, resolved the issue using a completely different solution.
I installed both certificates- the expired one and the newer one. Then I used this command to get a list of them:
certutil -store My
I get this output (info is fake and other certificate are not listed):
================ Certificate 1 ================
Serial Number: 6d
Issuer: E=operations#voicetrust.com, CN=VoiceTrust Server CA, OU=VoiceTrust Oper
ations, O=VoiceTrust
NotBefore: 03-Jan-2013 3:33 PM
NotAfter: 03-Mar-2013 3:33 PM
Subject: E=hgulzar#voicetrust.com, CN=hornet.voicetrust.com, OU=Software Develop
ment, O=VoiceTrust eServices MENA FZ LLC, L=Dubai, C=AE
Non-root Certificate
Cert Hash(sha1): 98 5f a0 d3 11 6a 4b 64 3b db 0a a4 11 66 fc 08 28 74 7e 53
Key Container = {E5BC0912-7808-4B89-B457-31946DE5990E}
Unique container name: dfedfcc149408fb990a3bacd6d31126b_3277b2c9-9894-46d0-9b6
4-30f0d6589239
Provider = Microsoft Enhanced Cryptographic Provider v1.0
Private key is NOT exportable
Encryption test passed
================ Certificate 2 ================
Serial Number: 6d
Issuer: E=operations#voicetrust.com, CN=VoiceTrust Server CA, OU=VoiceTrust Oper
ations, O=VoiceTrust
NotBefore: 03-Nov-2013 3:33 PM
NotAfter: 03-Dec-2013 3:33 PM
Subject: E=hgulzar#voicetrust.com, CN=hornet.voicetrust.com, OU=Software Develop
ment, O=VoiceTrust eServices MENA FZ LLC, L=Dubai, C=AE
Non-root Certificate
Cert Hash(sha1): 30 5f a0 d3 11 6a 4b 64 3b db 0a a4 11 66 fc 08 28 74 7e 53
Key Container = {E5BC0912-7808-4B89-B457-31946DE5960E}
*Unique container name:* 55edfcc149408fb990a3bacd6d31126b_3277b2c9-9894-46d0-9b6
4-30f0d6589239
Provider = Microsoft Enhanced Cryptographic Provider v1.0
Private key is NOT exportable
Encryption test passed
Now, everything seems OK but certificate 1 is expired and works if I try to bind it to a port whereas Certificate 2 fails with Error 1312.
The key difference that baffled me was the Unique container name property. It should be representing a physical key file on the hard drive in the %ProgramData%\Microsoft\Crypto\RSA\MachineKeys\
For Certificate 1, the file was there but for Certificate 2, there was no such file. After searching I found the file against Certificate 2 in the sub folder of %AppData%\Microsoft\Crypto\ folder. That's user specific keys not Machine level keys. It's amazing that the certificate is being imported into Computer store yet it always keeps the container key of User's store.
I deleted the '55edfcc149408fb990a3bacd6d31126b_3277b2c9-9894-46d0-9b64-30f0d6589239' file under the AppData folder and ran the repair command for my certificate 2 on the store:
certutil -repairstore My 2
This time, the Unique container name was reflecting a file in the proper folder under '%ProgramData%\Microsoft\Crypto\' and everything started working.
Hope this is helpful to someone.
I've been fighting error 1312 all day, what fixed it for me was to import the certificate in mmc as a .p12 file instead of a .crt. If you are creating it with OpenSSL then once you have created the .crt, do:
pkcs12 -export -in server.crt -inkey server.key -name “Your Name” -out server.p12
As described. When you go to import it in mmc it will be a called "Personal Information Exchange" file (and apparently a .pfx file would also work).
I'm new to writing servers and dealing with SSL and I have no idea why this works, but I hope it helps.
The problem was in step 4. I was using the Thumbprint from the Root Certificate for the value in certhash. To solve this I had to go back to the MMC and refresh the Certificates(Local Computer) -->Personal -->Certificate folder. Then use the Thumbprint from the certificate that is "Issued By" the Root Certificate Authority.
I my case the problem was that the CER file hasn't private key attached.
I've attached PK using those OpenSSL commands:
openssl x509 -in server.der -inform DER -out server.pem -outform PEM
openssl pkcs12 -export -in server.pem -inkey serverkey.pem -out server.p12
Works for CER/DER files.
I had the same problem and solved importing the certificate using this command:
c:> certutil -importPFX certname.pfx
Now the certificate appear using this command:
c:> certutil -store my
before this command the certificate doesn't appear
This might seem obvious; however, I think it can save someone some time of head scratching. I had imported a file with .cer extension under my Personal certificates folder (for the Personal Computer account). After a while, I realized that I needed to import the file with the *.pfx extension instead. Fixed that and voilà! Problem solved!
There are multiple ways of receiving this error (see above for other answers).
Another way to receive this specific error is to attempt to bind a certificate to a port when the certificate is not in the appropriate store.
Verify that the certificate is stored in the localMachine Root store (you can use certutil or certmgr.exe from command line to dump it correctly).
updated grammar :)
If anyone else runs into this problem and the answers in here do not clearly answer it, the underlying core problem is the private key needs to be imported. If you do not mark the certificate as exportable when you import it, the private key is not imported and you cannot bind it. If you delete it and re-import it and mark it as exportable, then it will work.
It also needs to be the local machine store as others have pointed out.
If:
you didn't have IIS on your machine (working with self-hosted WCF let's say), and
you made your cert request on another machine using IIS Manager (because you didn't understand that the private key comes from ciphers embedded in the cert request - and later the issued .pb7)
then:
just go install the .pb7 on the IIS machine you used to make the cert request (local machine/personal/certificates - using mmc);
export the cert from that machine, including its private key (assign password); and
install it using mmc on the WCF server (local machine/personal/certificates - using mmc).
Then, netsh will let you bind to port 443. No more 1312 errors.
Just to throw yet another answer into the ring, this is the problem I had:
Although I imported my certificate into the (Local Computer)\... certificate store, I had imported it into the Trusted Root Certification Authorities section. I needed to import it into the Personal section, otherwise this error occurred.
In my case, i have missing the certificate private key.
IF you imported the certificate using .NET, specific import flags must be used:
/// <summary>
/// Imports X.509 certificate from file to certificate store.
/// </summary>
/// <param name="fileName">Certificate file.</param>
/// <param name="password">Password.</param>
/// <param name="storeName">Store name.</param>
/// <param name="storeLocation">Store location.</param>
public static void ImportCertificate(string fileName, string password, StoreName storeName, StoreLocation storeLocation) {
var keyStorageFlags =
X509KeyStorageFlags.PersistKeySet
| (storeLocation == StoreLocation.LocalMachine ? X509KeyStorageFlags.MachineKeySet : X509KeyStorageFlags.UserKeySet);
var cert = new X509Certificate2(fileName, password, keyStorageFlags);
var store = new X509Store(storeName, storeLocation);
store.Open(OpenFlags.MaxAllowed);
store.Add(cert);
store.Close();
}
The ImportCertificate method is a part of the Woof.Security package created by me.
https://github.com/HTD/Woof.Security
https://www.nuget.org/packages/Woof.Security/
This is my summary of all the fixes in this thread and how it worked for me:
Find "Windows PowerShell", right-click on the icon, and choose "run as administrator".
Find "Wordpad", right-click on the icon, and choose "run as administrator". (this is so you can copy and paste between PowerShell and Wordpad.)
In PowerShell run "netsh HTTP show sslcert".
From the info that shows, copy the "Certificate Hash", "Application Id", and "Certificate Store Name". (You'll need all these in a moment.)
(If you need to) locate your *.cer or *.crt file and export it as a *.pfx file.
In Powershell, navigate to the folder of your *.pfx file.
Now run "certutil -importPFX .pfx".
Then run "certutil -store my" to show the installed certs.
Now using the info from step #4 run this "netsh http add sslcert ipport=0.0.0.0:8000 certstorename= certhash= appid='' (I had to put them in this order, with my cert store name, and single quotes around the app id.)
Check that the SSL cert was added by running "netsh HTTP show sslcert" again.
I had exact same problem eventhough my .pfx file had private key. Adding of certificate with MMC console was successful, but adding programatically using .Net X509Store.Add(X509Certificate2) method failed every time with error 1312. Certificate even had a key sign on the icon.
After several days finaly decided to make new certificate using makecert.exe as suggested in posts here. After that everything was fine. Key appeared in %ProgramData%\Microsoft\Crypto\RSA\MachineKeys. For some reason my earlier pfx file was not compatible.
In my experience, as long as your key in not appearing in %ProgramData%\Microsoft\Crypto\RSA\MachineKeys\, binding with 'netsh http add sslcert ....' will fail.
The certstorename argument should be the string value of the StoreName enumeration from the .net framework namespace System.Security.Cryptography.X509Certificates.
I've being working on this for hours, and basically read through what #DoomerDGR8 said above, but my fix was a lot more simple. I ran
C:\Windows\system32> certutil -store TRUSTEDPUBLISHER
This listed several certificates I have installed, I then ran repair store on the certificate that I was having a problem installing with netsh.
C:\Windows\system32> certutil -repairstore TRUSTEDPUBLISHER 6
The number 6 at the end represents the index of your certificate, found at in the store, hope this helps
In my case while creating the certificate I chose a different name than My for my Cert Store name. The default name is MY. So if yours is different append certstorename=Your provided store name to the command.
I had the same error when creating self signed certificate with OpenSSL(BouncyCastle) I resolved it with help from this post:
Cannot export generated certificate with private key to byte array in .net 4.0/4.5
I had to add:
RsaPrivateKeyStructure rsa = RsaPrivateKeyStructure.GetInstance(seq); //new RsaPrivateKeyStructure(seq);
RsaPrivateCrtKeyParameters rsaparams = new RsaPrivateCrtKeyParameters(
rsa.Modulus, rsa.PublicExponent, rsa.PrivateExponent, rsa.Prime1, rsa.Prime2, rsa.Exponent1, rsa.Exponent2, rsa.Coefficient);
var rsaPriv = DotNetUtilities.ToRSA(rsaparams);
var cspParams = new CspParameters
{
KeyContainerName = Guid.NewGuid().ToString(),
KeyNumber = (int)KeyNumber.Exchange,
Flags = CspProviderFlags.UseMachineKeyStore
};
var rsaPrivate = new RSACryptoServiceProvider(cspParams);**
// Import private key from BouncyCastle's rsa
rsaPrivate.ImportParameters(rsaPriv.ExportParameters(true));
// Set private key on our X509Certificate2
x509.PrivateKey = rsaPrivate;
So to add (yet) fix/situation.
I had C# code that used BouncyCastle to create self-signed certificates.
<packages>
<package id="BouncyCastle" version="1.8.1" targetFramework="net45" />
So my code created the certificates AND placed them in the correct locations in the Cert-Store.
Using the hints here, my install of On Premise Service Bus 1.1 was failing...and that led me here.
I ended up DELETING both certificates my BouncyCastle code had created (from the cert store) and reimporting them (with private keys)....and it all worked.
I imported FIRST to the
Certificates (Local Computer) / Personal / Certificates
then I copied pasted (in the mmc) to any other places (stores) I needed them.
My "before" and "after" looked exactly the same from my eyes in MMC, BUT it fixed the issue. Go figure.
I just had yet another error. I renewed an expired cert for our WorkFolders service from our CA using the same private key. Then I always got Error 1312. Even if Certificate Management shows I have a private key.
I could only solve the problem by re-issuing a new certificate (without the renew option). Then it worked on the first try.
Maybe this will help someone who also tried the renew option.
For me the problem was solved by ensuring that the certificate hash I was using in my command line, corresponded to the certificate installed on my server:
netsh http add sslcert ipport=0.0.0.0:8081 certhash=1061a577f0cc1c428186000dc84f02a7111ca1b2 appid={GUID}
On my side, the files provided were a P7B file together with a bunch of cert files. After getting stuck, I asked for my colleague's help and he gave me an idea to import the certificates together with the private key via a PFX.
This article gave me the instruction to convert the P7B file into PFX. To summarize, you simply have to do the following:
Use openssl to convert the P7B file into PEM first
Convert the PEM file into PFX
You can now import the PFX file. Better to read the article I stated above because it has significant information to note.
Finally I solved it. The problem is the certificate file. I tested it other mac and failed it. Here is my solution.
Remove .cer file
Re-create certificate file.
If failed, also re-create CSR file.
Thank you.
Looks like this is a generic error. My fix is unlike all the rest.
Using Azure Devops for a deployment, the step IIS Web App Manage has the cert hash buried/hidden in IIS Bindings (which the only way to see the cert hash is to edit that specific piece), so you have to update the hash so it matches on the server you're deploying to. And voila, you're set.
I was getting this error when trying to deploy from an Azure Devops pipeline to a Windows Server box running IIS. The pipeline should deploy the site to IIS and then create an https binding where the existing certificate in the computer cert store was referenced by it's thumbprint. In the pipeline the thumbprint was meant to be drawn from variable group - however the correct variable group wasn't linked to the pipeline (and the variable name was wrong) - so it got nothing.
Basically the wrong thumbprint was being used to identify the cert, I suspect it wasn't giving a standard "can't find the SSL cert" message because I was attempting to find the cert with a null.

WCF client certificare not valid

I try to send a message to MSMQ using WCF. I want to use Transport security and sign messages. However, when I set clientcertificate credentials and try to send message, an error is being thrown: "An error occurred while sending to the queue: The user certificate is invalid. (-1072824276, 0xc00e002c)". Certificate is stored in LocalMachine\My location and has read only access set for ASPNET process.
Here are two common reasons a certificate is considered "invalid":
You don't have the private key associated with the certificate. If you don't have the private key, you need to re-install the cert with the private key, or get a new cert for which you do have the private key.
The certificate is issued by a certificate authority that is not trusted by your computer. If this is the problem, you need to install the issuing authority's certificate into your "Trusted Root Certificate Authority" store (there are security risks involved with doing this so make sure you read the pop-up warning that will come up when trying to do this).
View the certificate in the CertMgr.msc to see if its one of these issues. (Start > Run > CertMgr.msc > Personal > Certificates).