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#### Pre-Submission Checklist
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in `doc/` subfolder, the README file is autogenerated)
#### Type Of Change
- [ ] Small bug fix (non-breaking change which fixes an issue)
- [x] New feature (non-breaking change which adds new functionality)
- [ ] Breaking change (fix or feature that would change existing functionality)
#### Checklist:
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checkboxes that apply -->
- [x] PR should be backported to stable branches
- [x] Tested changes locally
- [ ] Related to issue #XXXX (replace XXXX with an open issue number)
#### Description
<!-- Describe your changes in detail -->
Add auth_web3 module for blockchain-based authentication
This PR introduces a new authentication module that provides blockchain-powered
digest authentication via Oasis Sapphire smart contracts while maintaining full
compatibility with standard Kamailio auth module functions.
**Key Features:**
- Blockchain-based digest authentication via Oasis Sapphire smart contracts
- RFC2617 compliant MD5 and SHA-256 digest authentication
- Full compatibility with standard auth functions (www_authenticate,
proxy_authenticate)
- Configurable parameters: web3_rpc_url, web3_contract_address,
web3_debug_mode, web3_timeout
- Comprehensive error handling for network failures and blockchain connectivity
- Nonce management and replay protection identical to traditional auth
**Files Added:**
- src/modules/auth_web3/ (complete module with 9 .c files and supporting
headers)
- Comprehensive documentation in doc/ subfolder
- CMakeLists.txt with curl dependency handling
**Testing Summary:**
- **Build Verification**: Module compiles successfully with curl dependency
- **Load Testing**: Module loads without errors in Kamailio configuration
- **Authentication Scenarios**:
- Valid credentials: Successful authentication with correct blockchain
credentials
- Invalid credentials: Proper rejection of wrong passwords (tested with
Zoiper)
- Network failures: Graceful handling of blockchain RPC connectivity issues
- Parameter validation: All module parameters properly validated
- **Compatibility Testing**: Full compatibility with existing auth module
functions
- **Error Handling**: Comprehensive error logging and fallback behavior
**Documentation Status:**
- Complete XML documentation in doc/ subfolder
- Module parameters documented (auth_web3_params.xml)
- Functions documented (auth_web3_functions.xml)
- Configuration examples provided
- Usage patterns and best practices included
**Limitations:**
- Requires external blockchain RPC endpoint (Oasis Sapphire)
- Network dependency for authentication (no offline fallback)
- Requires curl library for HTTP requests to blockchain
- Smart contract must be deployed on target blockchain network
- Authentication speed depends on blockchain network response time
**Build System:**
- Added to MOD_LIST_UTILS group for proper curl dependency handling
- Includes CMakeLists.txt with find_package(CURL REQUIRED)
This module provides a drop-in replacement for traditional authentication while
leveraging blockchain technology for credential verification.
You can view, comment on, or merge this pull request online at:
https://github.com/kamailio/kamailio/pull/4328
-- Commit Summary --
* auth_web3: initial blockchain authentication module
* cmake: add auth_web3 to MOD_LIST_UTILS group
-- File Changes --
M cmake/groups.cmake (4)
A src/modules/auth_web3/CMakeLists.txt (9)
A src/modules/auth_web3/Makefile (17)
A src/modules/auth_web3/README (1229)
A src/modules/auth_web3/api.c (324)
A src/modules/auth_web3/api.h (170)
A src/modules/auth_web3/auth_web3_mod.c (1739)
A src/modules/auth_web3/auth_web3_mod.h (54)
A src/modules/auth_web3/challenge.c (316)
A src/modules/auth_web3/challenge.h (54)
A src/modules/auth_web3/doc/Makefile (4)
A src/modules/auth_web3/doc/auth_web3.xml (174)
A src/modules/auth_web3/doc/auth_web3_faq.xml (174)
A src/modules/auth_web3/doc/auth_web3_functions.xml (405)
A src/modules/auth_web3/doc/auth_web3_params.xml (922)
A src/modules/auth_web3/nc.c (246)
A src/modules/auth_web3/nc.h (78)
A src/modules/auth_web3/nid.c (96)
A src/modules/auth_web3/nid.h (88)
A src/modules/auth_web3/nonce.c (460)
A src/modules/auth_web3/nonce.h (228)
A src/modules/auth_web3/ot_nonce.c (232)
A src/modules/auth_web3/ot_nonce.h (83)
A src/modules/auth_web3/rfc2617.c (145)
A src/modules/auth_web3/rfc2617.h (97)
A src/modules/auth_web3/rfc2617_sha256.c (150)
A src/modules/auth_web3/rfc2617_sha256.h (71)
-- Patch Links --
https://github.com/kamailio/kamailio/pull/4328.patch
https://github.com/kamailio/kamailio/pull/4328.diff
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