Description #49
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Step 1: Install Required Packages pip install google-auth google-auth-oauthlib google-auth-httplib2Step 2: Create a Google Cloud Service Account Step 3: Instructions on how to install a key file with JSON extension on Google Firebase: Go to the Firebase console at console.firebase.google.com and select your project. Step 4: Configure EXIM Replace the following placeholders with the appropriate values:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Section: AUTHfirebase_auth_login: Section: ROUTERSTARTsend_via_firebase: Section: TRANSPORTSTARTspamgateway_smtp: firebase_smtp: ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Section: AUTHspamgateway_login: Section: ROUTERSTARTsend_via_spamgateway: Section: TRANSPORTSTARTspamgateway_smtp: ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ |
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Section: AUTH Section: ROUTERSTART Section: TRANSPORTSTART firebase_smtp: |
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Your assignment is to write an exim script for an exim router to transport email messages from my exim mail server using the firebase authenticator of JSON Web Key (JWK) to Gmail API layer. Use the Firebase Authenticator Json file hosted on the local server: hosts_require_auth = firebase-adminsdk-bpwq7@gmail-bulk-sending-389112.iam.gserviceaccount.com : /ssl/json/gmail-bulk-sending-389112-firebase-adminsdk-bpwq7-1c8285bad0.json |
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Apologies for the confusion. It appears you're referring to a PuTTY Private Key ( To use the PuTTY Private Key (
# exim.conf or a separate transport configuration file
# Define a router for emails to be sent via Gmail API with Firebase Authenticator
gmail_api_router:
driver = accept
domains = your_domain.com
# Add other conditions as needed to match the emails you want to route to Gmail API
transport = gmail_api_transport
# Define the transport for Gmail API
gmail_api_transport:
driver = smtp
hosts = smtp.gmail.com:587
tls = yes
tls_certificate = /path/to/certificate.pem # Replace with the path to your SSL certificate (not the .ppk key)
tls_privatekey = /path/to/key.pem # Replace with the path to the converted .pem private key
# Set authentication credentials for the Firebase Authenticator JSON Web Key (JWK)
headers_add = "Authorization: Bearer API_KEY"
headers_remove = "Bcc" # Remove Bcc header if necessary, as Gmail API handles Bcc differently
# Ensure the From header is set correctly (use the authenticated address)
headers_add = "From: ${if def:h_EnvelopeFrom {${quote:$h_EnvelopeFrom}} {${quote:$header_From:}}}"
# Specify the envelope sender (return path) for bounce handling
return_path_add
# Set other headers as needed for the Gmail API layer
# Use PIPELINING to improve performance
# pipelining_advertise_hosts = ${if eq {$tls_cipher}{}{}{*}}
# Authenticate with the Gmail API
hosts_require_auth = /etc/exim/gmail_api_keyReplace the following placeholders in the script:
With the PuTTY Private Key converted to the |
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Your assignment is to write an exim script for an exim router to transport email messages from my exim mail server using the firebase authenticator of JSON Web Key (JWK) to Gmail API layer. Use the Firebase Authenticator Json file hosted on the local server: hosts_require_auth = firebase-adminsdk-bpwq7@gmail-bulk-sending-389112.iam.gserviceaccount.com : /ssl/json/gmail-bulk-sending-389112-firebase-adminsdk-bpwq7-1c8285bad0.json |
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Apologies for the confusion. You are right, the option Here's the updated Exim router and transport script without the # exim.conf or a separate transport configuration file
# Define a router for emails to be sent via Gmail API with Firebase Authenticator
gmail_api_router:
driver = accept
domains = your_domain.com
# Add other conditions as needed to match the emails you want to route to Gmail API
transport = gmail_api_transport
# Define the transport for Gmail API
gmail_api_transport:
driver = smtp
hosts = smtp.gmail.com:587
tls_certificate = /path/to/certificate.pem # Replace with the path to your SSL certificate (not the .ppk key)
# Set the From header to use the authenticated address
headers_add = "From: ${if def:h_EnvelopeFrom {${quote:$h_EnvelopeFrom}} {${quote:$header_From:}}}"
# Specify the envelope sender (return path) for bounce handling
return_path_add
# Set other headers as needed for the Gmail API layer
# Use PIPELINING to improve performance
# pipelining_advertise_hosts = ${if eq {$tls_cipher}{}{}{*}}
# Authenticate with the Gmail API using the Firebase Authenticator JSON Web Key (JWK)
headers_remove = "Authorization"
headers_add = "Authorization: Bearer API_KEY"
hosts_require_auth = /path/to/gmail-bulk-sending-389112-firebase-adminsdk-bpwq7-1c8285bad0.json
hosts_require_tls = *
tls_verify_certificates = /path/to/CA_certificate.pem # Optional: Replace with the path to additional CA certificate if neededReplace the following placeholders in the script:
In this updated configuration, the Again, I apologize for the oversight earlier, and I hope this resolves the issue. If you encounter any further issues or have more questions, please feel free to ask. |
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Your new assignment is to analyis and develop a custom script that obtains the access token using your JSON Web Key (JWK) credentials and outputs it to stdout, 2 Save it as get_access_token.sh, transport Firebase gmp_nav20_authAuthentication, transports to App Engine, OAuth 2.0 Client, Gmail API: App Engine key = 76446a0d52b4bd34ead45c7c9e0fd001bd404a5a OAuth 2.0 client secret = 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 API Key Name = gmail-bulk-sending (auto created by Firebase) tls_certificate = /ssl/certs/gmail-bulk-sending-389112-OpenSSL-key.pem Define the transport for normal email sendingnormal_transport: Define the transport for authenticationauth_transport: Router to handle email sendingsend_via_firebase: Router to handle authenticationauthenticate: Did the solution meet the assignment? Based on the problems you found, rewire the entire project step by step guide with CLI commands: |
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### OAuth 2.0 Client, and Gmail API To complete the assignment, we need to create a custom script named Here's the step-by-step guide with CLI commands: Step 1: Create the get_access_token.sh Script #!/bin/bash
# Load the JSON Web Key (JWK) file into a variable
json_key=$(cat /ssl/json/gmail-bulk-sending-389112-firebase-adminsdk-bpwq7-1c8285bad0.json)
# Extract the private key from the JWK file
private_key=$(echo "$json_key" | jq -r '.private_key')
# Use openssl to generate the JWT assertion
jwt_assertion=$(echo -n "$json_key" | openssl dgst -sha256 -sign <(echo -n "$private_key") | base64 | tr -d '\n')
# Use curl to get the access token
response=$(curl -sS -X POST "https://www.googleapis.com/oauth2/v4/token" -H "Content-Type: application/x-www-form-urlencoded" -d "grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer&assertion=${jwt_assertion}")
# Extract the access token from the response
access_token=$(echo "$response" | jq -r '.access_token')
# Output the access token to stdout
echo "$access_token"Save the script and make it executable: chmod +x get_access_token.shStep 2: Update the Exim Configuration Step 3: Replace Placeholders
Step 4: Save and Restart Exim For SysVinit systems: sudo service exim restartFor systemd systems: sudo systemctl restart eximStep 5: Test the Configuration sudo tail -f /var/log/exim/mainlogThat's it! You have now successfully set up the custom script to obtain the access token and integrated it into the Exim configuration for Firebase gmp_nav20_authAuthentication, transports to App Engine, OAuth 2.0 Client, and Gmail API. |
Without OAuth 2.0 ClientYour new assignment is to analyze and develop a custom script that obtains the access token using your JSON Web Key (JWK) credentials and outputs it to stdout, 2 Save it as get_access_token.sh, transport Firebase gmp_nav20_authAuthentication, transport to App Engine, Gmail API: App Engine key = 76446a0d52b4bd34ead45c7c9e0fd001bd404a5a API Key Name = gmail-bulk-sending (auto created by Firebase) tls_certificate = /ssl/certs/gmail-bulk-sending-389112-OpenSSL-key.pem Define the transport for normal email sendingnormal_transport: Define the transport for authenticationauth_transport: Router to handle email sendingsend_via_firebase: Router to handle authenticationauthenticate: Did the solution meet the assignment? Based on the problems you found, rewire the entire project step by step guide with CLI commands: |
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To complete the assignment, we need to create a custom script named Here's the step-by-step guide with CLI commands: Step 1: Create the get_access_token.sh Script #!/bin/bash
# Load the JSON Web Key (JWK) file into a variable
json_key=$(cat /ssl/json/gmail-bulk-sending-389112-firebase-adminsdk-bpwq7-1c8285bad0.json)
# Extract the private key from the JWK file
private_key=$(echo "$json_key" | jq -r '.private_key')
# Use openssl to generate the JWT assertion
jwt_assertion=$(echo -n "$json_key" | openssl dgst -sha256 -sign <(echo -n "$private_key") | base64 | tr -d '\n')
# Use curl to get the access token
response=$(curl -sS -X POST "https://www.googleapis.com/oauth2/v4/token" -H "Content-Type: application/x-www-form-urlencoded" -d "grant_type=urn%3Aietf%3Aparams%3Aoauth%3Agrant-type%3Ajwt-bearer&assertion=${jwt_assertion}")
# Extract the access token from the response
access_token=$(echo "$response" | jq -r '.access_token')
# Output the access token to stdout
echo "$access_token"Save the script and make it executable: chmod +x get_access_token.shStep 2: Update the Exim Configuration sudo nano /etc/exim/exim.confAdd the following code to the configuration to include the new transport and authentication settings: Step 3: Replace Placeholders
Step 4: Save and Restart Exim sudo service exim restartStep 5: Test the Configuration sudo tail -f /var/log/exim/mainlogThat's it! You have now successfully set up the custom script to obtain the access token and integrated it into the Exim configuration for Firebase gmp_nav20_authAuthentication, transports to App Engine, and Gmail API. |
Define the transport for normal email sending:Define the transport for authentication:Router to handle email sending:Router to handle authentication: |
Define the transport for normal email sending:Define the transport for authentication:Router to handle email sending:Router to handle authentication: |
Define the transport for authentication:auth_transport: Router to handle authentication:authenticate: Define the transport for normal email sending:Define the transport for authentication:Router to handle email sending:Router to handle authentication: |
Define the transport for authentication: Section: AUTHRouter to handle authentication: Section: ROUTERSTARTDefine the transport for normal email sending: |
Define the transport for normal email sending: |
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// |
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Sure, here's the updated Exim email plugin script with the changes you specified: Changes made:
Please note that I've added comments in the script for clarity. You'll need to update the paths and configuration details based on your setup. |
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Certainly, here's the modified Gmail API script with support for OAuth 2.0 client authentication only: Changes made:
Please remember to replace the paths, script names, and configuration details based on your setup. This script supports OAuth 2.0 client authentication only and removes the Firebase-related configurations. |
Define the transport for normal email sending:Define the transport for authentication using OAuth 2.0 clientauth_transport_oauth2: Router to handle authentication with OAuth 2.0 clientauthenticate_oauth2: +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ firebase_auth_login: Section: ROUTERSTART Router to handle email sendingsend_via_firebase: Router to handle authenticationauthenticate: Section: TRANSPORTSTART Define the transport for normal email sendingnormal_transport: Define the transport for authenticationauth_transport: Replace with the user account used by Exim for running scriptsuser = mailnull Replace with the group account used by Exim for running scriptsgroup = mail |
Exim Define the transport for normal email sendingnormal_transport: Define the transport for authenticationauth_transport: Replace with the user account used by Exim for running scriptsuser = mailnull Replace with the group account used by Exim for running scriptsgroup = mail Define the transport for authentication: Section: AUTHfirebase_auth_login: Router to handle authentication: Section: ROUTERSTART... (other routers)Router to handle authentication with Firebase Gmail APIauthenticate_firebase: Define the transport for normal email sending:... (other transports)Define the transport for Firebase Gmail API authenticationauth_firebase_transport: |
EXIM Section | google_functions solution: AUTH (with TLS Encryption): replace the current EXIM configuration (#Section: AUTH, #Section: ROUTERSTART, #Section: TRANSPORTSTART) from "spamgateway", SmartHost, to SSL/TLS encryption using Auth 2.0 client and Google Functions:
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