Custom Certificates

1. What's it?
Proxyman supports Custom Server Certificates and Client Certificates that allow you adds your certificate that Proxyman uses to establish the SSL-Connection between your clients, servers and Proxyman app.
Custom Certificate Type
Purpose
How Proxyman uses
Server Certificate
For intecepting HTTPS Traffic from clients that use SSL-Pinning
Use this certifiacte for SSL-Handshake to your Clients
Client Certificate
For intecepting HTTPS Traffic from clients that use Mutual Authentication
Use this certifiacte for SSL-Handshake to specific Server
Custom Certificates
2. Certificate Formats
Proxyman accepts the following formats:
PKCS #12 (p12)
PEM or DER Private Key and Certificate file
Proxyman automatically determines the format of Private Key and Certificate file (Support PEM or DER)
Proxyman will prompt to enter the password if import an encrypted Private Key or PKCS #12 file
All passphrases are securely stored in Proxyman Keychain
If your certificates are different format that Proxyman supports, please convert them to p12 or PEM/DER format before importing
3. Certificate Requirement on macOS 10.15+ and iOS 13+
If you're using custom Server Certificate on macOS 10.15 or iOS 13, you might encounter the failed handshake on Safari or iOS devices if the following requirements doesn't meet:
RSA Key must have key size is greater than 2048 bits
Hash algorithm is SHA-2 family
DNS Name of the server must present on Subject Alternative Name. Common Name is no longer trusted
Valid certificate (Current day is in Not Before and Not After)
TLS server certificates must contain an ExtendedKeyUsage (EKU) extension containing the id-kp-serverAuth OID.
Read more https://support.apple.com/en-us/HT210176​
4. Common issues
Problem
Solution
Private Key and Certificate are not matched
Try different certificates and private key and make sure they are matched
Get SSL Handshake Error for custom certificates
Try to add the custom Certificate to System Keychain and Trust it
Certificate doesn't match the requirement from macOS => Read section 3​
Check expires day of the Certificate
Couldn't import certificate due to invalid passphrase
Ask the developer to give correct passpharse to open encrypted Private Key or P12 file
5. How to use
Access from Certificate Menu -> Add Custom Certificate
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Last updated 2 weeks ago

Custom Certificate Type	Purpose	How Proxyman uses
Server Certificate	For intecepting HTTPS Traffic from clients that use SSL-Pinning	Use this certifiacte for SSL-Handshake to your Clients
Client Certificate	For intecepting HTTPS Traffic from clients that use Mutual Authentication	Use this certifiacte for SSL-Handshake to specific Server

Problem	Solution
Private Key and Certificate are not matched	Try different certificates and private key and make sure they are matched
Get SSL Handshake Error for custom certificates	Try to add the custom Certificate to System Keychain and Trust it Certificate doesn't match the requirement from macOS => Read section 3 Check expires day of the Certificate
Couldn't import certificate due to invalid passphrase	Ask the developer to give correct passpharse to open encrypted Private Key or P12 file