Scripts for signing using KSP library on GitLab

Prerequisites

A GitLab repository
DigiCert® KeyLocker credentials
DigiCert® KeyLocker client tools

Client tools

DigiCert® KeyLocker clients can be downloaded in a package.

Download Client tools

Sign in to DigiCert ONE.
Navigate to DigiCert® KeyLocker > Resources > Client tool repository.
Select your operating system.
Click the download icon next to DigiCert® KeyLocker clients.

Register the KSP

To register the KSP, open a command prompt and run:

smksp_registrar.exe register

Verify the KSP

To verify that your KSP is configured properly, and that your client can properly authenticate to the DigiCert® KeyLocker service, run:

certutil.exe -csp "DigiCert Software Trust Manager KSP" -key -user

Synchronize certificates

For the client tools to access the private keys in the service through the Key Storage Provider (KSP), your certificates must be synchronized to the local certificate store. Only if the certificate is synchronized, the private key remains stored securely in DigiCert® KeyLocker.

To synchronize your certificates to the local certificate store, open a command prompt and run:

smksp_cert_sync.exe

To view the certificates, open Certificate Manager for the user account used to run the certificate sync utility:

certmgr.msc

If you do not see your certificates in the Certificate Manager, verify that you have opened the correct certificate store. There is a different certificate store for each Windows user account.

Note

All certificates are synched to the user store only. The certificates are not synchronized to the machine store (yet).

Set PATH environment variables

Operating systems use the environment variable called PATH to determine where executable files are stored on your system. Use the PATH environment variable to store the file path to your signing tools to ensure that the CLI can reference these signing tools.

Example 1. Windows

You can set the PATH environment variable using command line or via the environment variables.

To set the path to your signing tools via command line:

set PATH=%path%;<path to DigiCert Keylocker Tools>

Command sample:

set PATH=%path%;C:\Program Files\DigiCert\DigiCert Keylocker Tools

To set the path to your signing tools for your system or account:

Search for environment variables in the Windows start menu.
Select Edit environment variables for your account or Edit system environment variables.
Double click on the Path variable.
Click New.
Select Browse.
Select the path to the signing tool.
Click OK to save the path.
Click on OK to close the dialog.

Example 2. Linux

To set the path to your signing tools via command line:

Launch the Terminal application.
Open the file in an editor:
```
nano ~/.profile
```

Add any exports definitions you need:

export PATH=<Path to DigiCert Keylocker Tools>

Click CTRL+X to exit.
Click Y to save.
Click Enter to keep the same file name.
Execute the new .profile by restarting Terminal or using:
```
 source ~/.profile
```

Example 3. macOS

To set the path to your signing tools via command line:

Launch the Terminal application.
Create a profile file:
```
touch ~/.zprofile
```
Open the file in an editor:
```
open ~/.zprofile
```

Add any exports definitions you need, such as:

export PATH=<Path to DigiCert Keylocker Tools>

To save the new .zprofile, click File > Save (CMD + S).
Close the terminal window and reopen to use new saved variables.

User authentication

DigiCert® KeyLocker enforces multifactor authentication for security. To access keypairs, certificates, and sign code, you need to set up two types of credentials: an API token and an authentication certificate.

Create an API token

The API token is an authentication method used to verify you as a user and your permissions assigned in DigiCert ONE. The API token provides the first factor authentication.

Follow these steps to generate an API token:

Sign in to DigiCert ONE.
Select the profile icon (top-right).
Select Admin Profile.
Scroll down to API Tokens.
Select  Create API token.
Note
The API token is only shown once, securely store the API key to use it later.

Create an authentication certificate

The client authentication certificate is an authentication method used to verify you as a user and your permissions assigned in DigiCert ONE. The client authentication certificate provides the second factor authentication.

Follow these steps to create a client authentication certificate:

Sign in to DigiCert ONE.
Select the profile icon (top-right).
Select Admin Profile.
Scroll down to Authentication certificates.
Select Create authentication certificate.
Note
The client authentication certificate password shown after creating an client authentication certificate cannot be accessed again, download the certificate and securely store the password to use it later.

DigiCert® KeyLocker environment variables

Set the following environment variables:

Variable	Description
SM_API_KEY	Provide your API token.
SM_CLIENT_CERT_FILE	Provide your client authentication certificate.
SM_CLIENT_CERT_PASSWORD	Provide your client certificate password.
SM_HOST	Provide your host environment.

Set certificate file in environment variables

Identify your client authentication certificate.
Encode the file to base64. For encoding run command:
```
base64 file_name
```

In GitLab > CI/CD Settings > Variables add the new variables:

Key = SM_CLIENT_CERT_FILE_B64
Value = encoded value from base64 file_name

Setup certificate file for signing:

stages:
  - set-SM-certificate

variables:
  SM_API_KEY: $SM_API_KEY
  SM_CLIENT_CERT_PASSWORD: $SM_CLIENT_CERT_PASSWORD
  SM_HOST: $SM_HOST

set_SM_certificate:
  stage: set-SM-certificate
  tags:  
  - saas-windows-medium-amd64

  script:
    - |
      cd C:\
      New-Item C:\CERT_FILE.p12.b64
      Set-Content -Path C:\CERT_FILE.p12.b64 -Value $SM_CLIENT_CERT_FILE_B64
      certutil -decode CERT_FILE.p12.b64 Certificate_pkcs12.p12

  variables:
    SM_CLIENT_CERT_FILE: 'C:\Certificate_pkcs12.p12'

Environment variables setup for GitLab CI/CD

The client tools need these environment variables to connect with DigiCert® KeyLocker.

They can be integrated as GitLab variables in GitLab Repository.

The values for these environment variables:

Table 1. Environment variables

Environment variables	Description
SM_CLIENT_CERT_PASSWORD	The password from client authentication certificate setup.
SM_CLIENT_CERT_FILE_B64	The base64 encoded text of certificate downloaded from client authentication certificate setup.
SM_HOST	The path to the DigiCert ONE portal with client authorization. Note In most cases, this path stays as it is unless you are connecting to a self-hosted instance of the DigiCert ONE product.
SM_API_KEY	The API token generated during API token setup.
SM_CODE_SIGNING_CERT_SHA1_HASH	The certificate fingerprint.

Command to set environment variables:

stages:
  - set-variables

variables:
  SM_API_KEY: $SM_API_KEY
  SM_CLIENT_CERT_PASSWORD: $SM_CLIENT_CERT_PASSWORD
  SM_HOST: $SM_HOST
  SIGNTOOL: 'C:\Program Files (x86)\Windows Kits\10\App Certification Kit\signtool.exe'
  MAGE: 'C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\mage.exe'
  SSM: 'C:\Program Files\DigiCert\DigiCert ONE Signing Manager Tools'

Note

"C:\Program Files (x86)\Windows Kits\10\App Certification Kit" is the path of signtool.exe and "C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools" is the path of mage.exe

Client tools setup

Client control setup

Download and install the Keylockertools-windows-x64.msi using curl command given below, to invoke the client control from GitLab CI/CD:

stages:
  - set-SM-certificate

set_SM_certificate:
  stage: set-SM-certificate
  tags:  
  - saas-windows-medium-amd64

  script:
    - |
      curl.exe -X GET  https://ONE.digicert.com/signingmanager/api-ui/v1/releases/Keylockertools-windows-x64.msi/download -H "x-api-key: $SM_API_KEY" -o Keylockertools-windows-x64.msi
      msiexec.exe /i Keylockertools-windows-x64.msi /quiet /qn | Wait-Process

Note

“curl” command is used to install the Keylockertools-windows-x64.msi installer and “msiexec” is used to silently install the Keylockertools-windows-x64.msi.

Verify the KSP

To verify that the KSP is registered, run:

stages:
  - set-SM-certificate

set_SM_certificate:
  stage: set-SM-certificate
  tags:  
  - saas-windows-medium-amd64

  script:
    - |
      & $SSM\smksp_registrar.exe list

Integration with GitLab CI/CD

Find Signtool and Mage

Command to find signtool:

stages:
  - set-SM-certificate

set_SM_certificate:
  stage: set-SM-certificate
  tags:  
  - saas-windows-medium-amd64

  script:
    - |
      Get-ChildItem -Path 'C:\Program Files (x86)\Windows Kits\10\App Certification Kit' -Filter signtool.exe -Recurse

Command to find Mage:

stages:
  - set-SM-certificate

set_SM_certificate:
  stage: set-SM-certificate
  tags:  
  - saas-windows-medium-amd64

  script:
    - |
      Get-ChildItem -Path 'C:\Program Files (x86)\Microsoft SDKs\Windows'     -Filter mage.exe -Recurse

Sign

You can sign with Mage, NuGet, or SignTool.

Sign with SignTool

To sign with SignTool:

stages:
  - set-SM-certificate

set_SM_certificate:
  stage: set-SM-certificate
  tags:  
  - saas-windows-medium-amd64

  script:
    - |
          & $SIGNTOOL sign /sha1 <certificate thumbprint> /tr http://timestamp.digicert.com /td SHA256 /fd SHA256 <file to be signed>

The input parameters are the thumbprint of the certificate to be used for signing and the path to the .exe or .dll to be signed.

Sign with Mage

To sign with Mage:

Signing using nuget.exe:
stages:
  - set-SM-certificate

set_SM_certificate:
  stage: set-SM-certificate
  tags:  
  - saas-windows-medium-amd64

  script:
    - |
           nuget sign <package folder> -Timestamper http://timestamp.digicert.com -outputdirectory <output folder> -Certificate Fingerprint <SHA1 Thumbprint> -HashAlgorithm SHA256 -Verbosity detailed -Overwrite

The inputs to this task are the path to the package and the thumbprint of the certificate. The certificate thumbprint on can be identified on the certificate details page in DigiCert ONE portal.

Verify signature

You can verify a signature with Mage, NuGet, or SignTool.

Verify signature with Mage

To verify a signature with Mage:

stages:
  - set-SM-certificate

set_SM_certificate:
  stage: set-SM-certificate
  tags:  
  - saas-windows-medium-amd64

  script:
    - |
           & $MAGE -Verify <Path to signed .application file>

The only input required here is the path to the signed .application file.

Verify signature with NuGet

To verify a signature with NuGet:

stages:
  - set-SM-certificate

set_SM_certificate:
  stage: set-SM-certificate
  tags:  
  - saas-windows-medium-amd64

  script:
    - |
           nuget verify -All <output folder>\*

The only input required here is the path to the signed folder.

Verify signature with SignTool

To verify a signature with SignTool:

stages:
  - set-SM-certificate

set_SM_certificate:
  stage: set-SM-certificate
  tags:  
  - saas-windows-medium-amd64

  script:
    - |
           & $SIGNTOOL verify /v /pa <Path to the signed .exe or .dll>

The only input for this step is the path to the signed .exe or .dll that needs to be verified.

Sample GitLab CI/CD

KSP Signing using GitLab CI/CD

stages:
  - set-variables
  - ksp-signing

variables:
  SM_API_KEY: $SM_API_KEY
  SM_CLIENT_CERT_PASSWORD: $SM_CLIENT_CERT_PASSWORD
  SM_HOST: $SM_HOST
  SIGNTOOL: 'C:\Program Files (x86)\Windows Kits\10\App Certification Kit\signtool.exe'
  MAGE: 'C:\Program Files (x86)\Microsoft SDKs\Windows\v10.0A\bin\NETFX 4.8 Tools\mage.exe'
  SSM: 'C:\Program Files\DigiCert\DigiCert ONE Signing Manager Tools'

ksp_signing_job:
  stage: ksp-signing
  tags:  
  - saas-windows-medium-amd64

  variables:
    SM_CLIENT_CERT_FILE: 'C:\Certificate_pkcs12.p12'


  script:
    - |
      cd C:\
      New-Item C:\CERT_FILE.p12.b64
      Set-Content -Path C:\CERT_FILE.p12.b64 -Value $SM_CLIENT_CERT_FILE_B64
      certutil -decode CERT_FILE.p12.b64 Certificate_pkcs12.p12
      
      curl.exe -X GET  https://one.digicert.com/signingmanager/api-ui/v1/releases/Keylockertools-windows-x64.msi/download -H "x-api-key:019d9d49dd7271dd236e84fb83_c879133c1c3f524f2ef68327674135080d34018a3d6128b84e5c982c5769b088" -o Keylockertools-windows-x64.msi
      msiexec.exe /i Keylockertools-windows-x64.msi /quiet /qn | Wait-Process

      & $SSM\smksp_cert_sync.exe

      Copy-Item -Path GitLab-Runner\builds\mypersonal23\signing\UNSIGNED.EXE -Destination C:\
      Copy-Item -Path GitLab-Runner\builds\mypersonal23\signing\UNSIGNED1.manifest -Destination C:\
      Copy-Item -Path GitLab-Runner\builds\mypersonal23\signing\UNSIGNED.nupkg -Destination C:\
      dir 'C:\'

      & $SIGNTOOL sign /sha1 $SM_CODE_SIGNING_CERT_SHA1_HASH /tr http://timestamp.digicert.com /td SHA256 /fd SHA256 C:\UNSIGNED.EXE
      & $SIGNTOOL verify /v /pa C:\UNSIGNED.EXE

      & $MAGE -sign C:\UNSIGNED1.manifest -CertHash $SM_CODE_SIGNING_CERT_SHA1_HASH -a sha256RSA
      & $MAGE -Verify C:\UNSIGNED1.manifest
      
      nuget sign C:\UNSIGNED.nupkg -Timestamper http://timestamp.digicert.com -outputdirectory C:\Signed -CertificateFingerprint $SM_CODE_SIGNING_CERT_SHA1_HASH -HashAlgorithm SHA256 -Verbosity detailed -Overwrite
      nuget verify -All C:\Signed\*
      dir C:\

Scripts for signing using KSP library on GitLab

Prerequisites

Note

Client tools

Download Client tools

Register the KSP

Verify the KSP

Synchronize certificates

Note

Set PATH environment variables

User authentication

Create an API token

Note

Create an authentication certificate

Note

DigiCert​​®​​ KeyLocker environment variables

Set certificate file in environment variables

Environment variables setup for GitLab CI/CD

Note

Note

Client tools setup

Note

Integration with GitLab CI/CD

Sign

Sign with SignTool

Sign with Mage

Verify signature

Verify signature with Mage

Verify signature with NuGet

Verify signature with SignTool

Sample GitLab CI/CD

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DigiCert® KeyLocker environment variables