1. Mac App Store For Windows
2. Zscaler Mac App Store For Windows

Over 90% of websites now use TLS encryption (HTTPS) as the access method. Enterprises utilise TLS inspection for Advanced Threat Protection, Access controls, Visibility, and

In this directory structure, you can add the Zscaler certificate into the certs directory by simply copying the file in.

cp ZscalerRootCertificate-2048-SHA256.crt $(openssl version -d | cut -f2 -d ')/certs

Alternatively you can place the file into the anchors directory and run the update-ca-trust command to push the certificate into the CA-Trust files. This is more effective since the CA-Trust file could be directly referenced by other applications

cp ZscalerRootCertificate-2048-SHA256.crt /etc/pki/ca-trust/source/anchors/ && update-ca-trust

Python

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Python will (again) typically use it’s own CA store. You can identify the store if certifi package is installed

python -m certifi

Which will output

/usr/lib/python2.7/site-packages/certifi/cacert.pem

You can update the Zscaler certificate into this CA Store by doing the following

cat ZscalerRootCertificate-2048-SHA256.crt >> $(python -m certifi)

Similarly, you can configure system variables to point to this CA Store (or point to the OpenSSL store you’ve updated previously)

export CERT_PATH=$(python -m certifi)
export SSL_CERT_FILE=${CERT_PATH}
export REQUESTS_CA_BUNDLE=${CERT_PATH}

Base Operating System

MacOS behaves very similar to Linux, but has it’s own configurations and directories. MacOS will mostly use the keychain, which should keep the OpenSSL CA Store in sync. Either import the certificate to the trusted root store using Keychain, or perform the following in the terminal.

sudo security add-trusted-cert -d -r trustRoot -k /Library/Keychains/System.keychain <CERTIFICATE>

It may still be necessary to update the OpenSSL CA Store to include the Zscaler certificate for any application which reads it directly.

sudo cat ZscalerRootCertificate-2048-SHA256.crt >> /usr/local/etc/openssl/cert.pem

Python

Python will (again) typically use it’s own CA store. You can identify the store if certifi package is installed

python -m certifi

Which will output

~/Library/Python/3.7/lib/python/site-packages/certifi/cacert.pem

You can update the Zscaler certificate into this CA Store by doing the following

cat ZscalerRootCertificate-2048-SHA256.crt >> $(python -m certifi)

Mac App Store For Windows

Similarly, you can configure system variables to point to this CA Store (or point to the OpenSSL store you’ve updated previously)

export CERT_PATH=$(python -m certifi)
export SSL_CERT_FILE=${CERT_PATH}
export REQUESTS_CA_BUNDLE=${CERT_PATH}

Docker – on Windows, MacOS, and Linux, will use the OpenSSL CA Trust for it’s connections – ensure these are configured to allow Docker to download packages as you instantiate them in your Dockerfile

Once the Dockerfile is loaded and being processed, containers will make their own connections which will need to trust the Zscaler certificate. It’s therefore important to combine the above approaches to ensure your Docker container has the Zscaler certificates installed.

This example uses three files. The .env file controls whether the build is being run in production (no-Zscaler) or development (Zscaler). The docker-compose.yaml file reads the BUILD_ENV variables and passes to the Dockerfile

.env

BUILD_ENV=production

OR

BUILD_ENV=development

docker-compose.yaml

version: '3.1'

services:

dotnetconf19:
image: dockersamples/dotnetconf:19
build:
context: .
args:
- BUILD_ENV=${BUILD_ENV:-production}
- CERT_FILE=${CERT_FILE:-/etc/ssl/certs/ca-certificates.crt}
environment:
- BUILD_ENV=${BUILD_ENV:-production}
- CERT_FILE=${CERT_FILE:-/etc/ssl/certs/ca-certificates.crt}

Dockerfile

Zscaler Mac App Store For Windows

FROM mcr.microsoft.com/dotnet/core/sdk:3.0.100-preview9 AS builder

#No need to install certificates here – no Internet requests made

WORKDIR /src
COPY src/WebRequests.csproj .
RUN dotnet restore

COPY src/ .
RUN dotnet publish -c Release -o /out WebRequests.csproj

FROM mcr.microsoft.com/dotnet/core/runtime:3.0.0-preview9

#Image runs internet requests over HTTPS – Install Certs if dev environment
#Set ARG BUILD_ENV default = production
ARG BUILD_ENV=production

#Assign the $BUILD_ENV the BUILD_ENV ENV so that it can be accessed
ENV BUILD_ENV $BUILD_ENV
#Add the CA Certificate to the container
ADD src/ZscalerRootCertificate-2048-SHA256.crt /tmp/ZscalerRootCertificate-2048-SHA256.crt
#Use BUILD_ENV variable within the container to copy the CA certificate into the certificate directory and update
RUN if [ '$BUILD_ENV' = 'production' ] ; then echo 'production env'; else echo 'non-production env: BUILD_ENV'; CERT_DIR=(openssl version -d | cut -f2 -d ')/certs ; cp /tmp/ZscalerRootCertificate-2048-SHA256.crt $CERT_DIR ; update-ca-certificates ; fi

#Continue the build where the HTTPS Connections are made
WORKDIR /app
ENTRYPOINT ['dotnet', 'WebRequests.dll']
ENV DotNetBot:Message='docker4theEdge!'

COPY --from=builder /out/ .