graph LR
SSH_Core_Protocol_Engine["SSH Core Protocol Engine"]
SSH_Client_Application["SSH Client Application"]
SSH_Server_Daemon["SSH Server Daemon"]
Authentication_Manager["Authentication Manager"]
SFTP_Subsystem["SFTP Subsystem"]
Configuration_Parser["Configuration Parser"]
Platform_Abstraction_Layer_PAL_["Platform Abstraction Layer (PAL)"]
Performance_Optimization_Module["Performance Optimization Module"]
SSH_Core_Protocol_Engine -- "Interacts with" --> SSH_Client_Application
SSH_Core_Protocol_Engine -- "Interacts with" --> SSH_Server_Daemon
SSH_Core_Protocol_Engine -- "Orchestrates authentication by interacting with" --> Authentication_Manager
SSH_Core_Protocol_Engine -- "Provides secure channel foundation for" --> SFTP_Subsystem
SSH_Core_Protocol_Engine -- "Relies on" --> Configuration_Parser
SSH_Core_Protocol_Engine -- "Leverages" --> Platform_Abstraction_Layer_PAL_
SSH_Core_Protocol_Engine -- "Integrates with" --> Performance_Optimization_Module
SSH_Client_Application -- "Interacts with" --> SSH_Core_Protocol_Engine
SSH_Client_Application -- "Utilizes" --> Configuration_Parser
SSH_Server_Daemon -- "Interacts with" --> SSH_Core_Protocol_Engine
SSH_Server_Daemon -- "Delegates to" --> Authentication_Manager
Authentication_Manager -- "Interacts with" --> SSH_Core_Protocol_Engine
Authentication_Manager -- "Leverages" --> Platform_Abstraction_Layer_PAL_
SFTP_Subsystem -- "Utilizes" --> SSH_Core_Protocol_Engine
SFTP_Subsystem -- "Interacts with" --> Platform_Abstraction_Layer_PAL_
Configuration_Parser -- "Provides configuration to" --> SSH_Core_Protocol_Engine
Configuration_Parser -- "Provides configuration to" --> SSH_Client_Application
Platform_Abstraction_Layer_PAL_ -- "Provides OS services to" --> SSH_Core_Protocol_Engine
Platform_Abstraction_Layer_PAL_ -- "Provides OS services to" --> Authentication_Manager
Performance_Optimization_Module -- "Enhances performance of" --> SSH_Core_Protocol_Engine
click SSH_Core_Protocol_Engine href "https://github.com/CodeBoarding/GeneratedOnBoardings/blob/main/hpn-ssh/SSH_Core_Protocol_Engine.md" "Details"
Abstract Components Overview of an HPN-SSH Project
SSH Core Protocol Engine [Expand]
The central component responsible for managing the fundamental SSH protocol state, including key exchange, encryption/decryption, data buffering, and network communication. It incorporates HPN-SSH performance enhancements and forms the secure communication channel.
Related Classes/Methods:
kex.c(1:1)cipher.c(1:1)packet.c(1:1)channels.c(1:1)auth.c(1:1)
The user-facing application (hpnssh, hpnscp, hpnsftp) that initiates SSH connections, handles user input, and presents output. It relies on the SSH Core Protocol Engine for secure communication.
Related Classes/Methods:
client.c(1:1)ssh.c(1:1)scp.c(1:1)sftp.c(1:1)
The background process (hpnsshd) that listens for incoming SSH connections, manages user authentication, and handles multiple concurrent sessions. It extensively uses the SSH Core Protocol Engine for protocol handling.
Related Classes/Methods:
sshd.c(1:1)server.c(1:1)
Manages various authentication methods (e.g., password, public key, PAM, Kerberos, FIDO2). It interacts with the SSH Core Protocol Engine to perform authentication challenges and verify credentials.
Related Classes/Methods:
auth.c(1:1)auth-options.c(1:1)auth2.c(1:1)monitor.c(1:1)
Implements the SSH File Transfer Protocol, allowing secure file transfers and remote file system management over an established SSH channel. It builds upon the secure communication provided by the SSH Core Protocol Engine.
Related Classes/Methods:
sftp.c(1:1)sftp-server.c(1:1)
Responsible for reading, parsing, and validating configuration files (e.g., ssh_config, sshd_config). It provides configuration parameters to various components, including the SSH Core Protocol Engine.
Related Classes/Methods:
readconf.c(1:1)misc.c(1:1)
A layer that abstracts operating system-specific functionalities, providing a consistent interface for components like the SSH Core Protocol Engine, Authentication Manager, and SFTP Subsystem. This includes handling system calls, networking, and security features (e.g., sandboxing).
Related Classes/Methods:
compat.c(1:1)openbsd-compat.c(1:1)
Contains specific code and logic for HPN-SSH performance enhancements, such as receive buffer optimization and parallelized ciphers. It integrates directly with the SSH Core Protocol Engine to accelerate data transfer.
Related Classes/Methods:
packet.c(1:1)cipher.c(1:1)hpn-ssh-specific.c(1:1)