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1 //! Proof systems module for ZephyrFS
2 //!
3 //! Provides cryptographic proof-of-storage and verification systems
4 //! without compromising zero-knowledge architecture.
5
6 pub mod storage_proof;
7
8 pub use storage_proof::{
9 StorageProofSystem, ProofConfig, StorageChallenge, StorageProof, ProofVerificationResult,
10 ChunkDataAccessor, ChunkMetadata, ChunkAccessStats, StorageStats
11 };
12
13 use anyhow::Result;
14 use serde::{Deserialize, Serialize};
15 use std::collections::HashMap;
16 use uuid::Uuid;
17
18 /// Unified proof system configuration
19 #[derive(Debug, Clone, Serialize, Deserialize)]
20 pub struct UnifiedProofConfig {
21 /// Storage proof configuration
22 pub storage_proof_config: storage_proof::ProofConfig,
23 /// Global proof policies
24 pub global_policies: GlobalProofPolicies,
25 }
26
27 /// Global proof system policies
28 #[derive(Debug, Clone, Serialize, Deserialize)]
29 pub struct GlobalProofPolicies {
30 /// Enable automatic proof generation
31 pub auto_proof_generation: bool,
32 /// Proof verification frequency (seconds)
33 pub verification_frequency: u64,
34 /// Require proofs for all stored chunks
35 pub mandatory_proofs: bool,
36 /// Enable distributed proof verification
37 pub distributed_verification: bool,
38 /// Proof aggregation for efficiency
39 pub enable_proof_aggregation: bool,
40 }
41
42 impl Default for UnifiedProofConfig {
43 fn default() -> Self {
44 Self {
45 storage_proof_config: storage_proof::ProofConfig::default(),
46 global_policies: GlobalProofPolicies {
47 auto_proof_generation: true,
48 verification_frequency: 3600, // 1 hour
49 mandatory_proofs: true,
50 distributed_verification: false,
51 enable_proof_aggregation: true,
52 },
53 }
54 }
55 }
56
57 /// Unified proof system manager
58 pub struct UnifiedProofManager {
59 storage_proof_system: StorageProofSystem,
60 config: UnifiedProofConfig,
61 active_challenges: HashMap<Uuid, ChallengeContext>,
62 proof_cache: HashMap<Uuid, CachedProofResult>,
63 }
64
65 impl UnifiedProofManager {
66 /// Create new unified proof manager
67 pub fn new(config: UnifiedProofConfig, node_id: String) -> Self {
68 let storage_proof_system = StorageProofSystem::new(
69 config.storage_proof_config.clone(),
70 node_id,
71 );
72
73 Self {
74 storage_proof_system,
75 config,
76 active_challenges: HashMap::new(),
77 proof_cache: HashMap::new(),
78 }
79 }
80
81 /// Generate comprehensive storage proof challenge
82 pub async fn generate_comprehensive_challenge(
83 &mut self,
84 chunk_ids: Vec<Uuid>,
85 challenge_context: ChallengeContext,
86 ) -> Result<ComprehensiveChallenge> {
87 // Generate base storage challenge
88 let storage_challenge = self.storage_proof_system.generate_challenge(chunk_ids.clone())?;
89
90 // Store challenge context
91 self.active_challenges.insert(storage_challenge.challenge_id, challenge_context);
92
93 // Create comprehensive challenge
94 Ok(ComprehensiveChallenge {
95 storage_challenge,
96 additional_requirements: self.get_additional_requirements(&chunk_ids),
97 deadline: storage_challenge.expiry_timestamp,
98 verification_nodes: self.select_verification_nodes()?,
99 })
100 }
101
102 /// Generate proof response for comprehensive challenge
103 pub async fn generate_comprehensive_proof(
104 &mut self,
105 challenge: &ComprehensiveChallenge,
106 accessor: &dyn ChunkDataAccessor,
107 ) -> Result<ComprehensiveProofResponse> {
108 // Generate base storage proof
109 let storage_proof = self.storage_proof_system
110 .generate_proof(&challenge.storage_challenge, accessor)
111 .await?;
112
113 // Generate additional proofs based on requirements
114 let additional_proofs = self.generate_additional_proofs(
115 &challenge.additional_requirements,
116 accessor,
117 ).await?;
118
119 // Aggregate proofs if enabled
120 let aggregated_proof = if self.config.global_policies.enable_proof_aggregation {
121 Some(self.aggregate_proofs(&storage_proof, &additional_proofs)?)
122 } else {
123 None
124 };
125
126 let response = ComprehensiveProofResponse {
127 storage_proof,
128 additional_proofs,
129 aggregated_proof,
130 response_timestamp: std::time::SystemTime::now()
131 .duration_since(std::time::UNIX_EPOCH)?
132 .as_secs(),
133 proof_metadata: self.generate_proof_metadata(&challenge)?,
134 };
135
136 // Cache the proof result
137 self.cache_proof_result(challenge.storage_challenge.challenge_id, &response);
138
139 Ok(response)
140 }
141
142 /// Verify comprehensive proof response
143 pub async fn verify_comprehensive_proof(
144 &mut self,
145 challenge: &ComprehensiveChallenge,
146 response: &ComprehensiveProofResponse,
147 ) -> Result<ComprehensiveVerificationResult> {
148 // Check if we have a cached result
149 if let Some(cached) = self.get_cached_verification(challenge.storage_challenge.challenge_id) {
150 if !self.is_verification_cache_expired(&cached) {
151 return Ok(cached.result);
152 }
153 }
154
155 // Verify base storage proof
156 let storage_verification = self.storage_proof_system
157 .verify_proof(&challenge.storage_challenge, &response.storage_proof)
158 .await?;
159
160 // Verify additional proofs
161 let additional_verifications = self.verify_additional_proofs(
162 &challenge.additional_requirements,
163 &response.additional_proofs,
164 ).await?;
165
166 // Verify aggregated proof if present
167 let aggregation_verification = if let Some(aggregated) = &response.aggregated_proof {
168 Some(self.verify_aggregated_proof(aggregated, challenge, response).await?)
169 } else {
170 None
171 };
172
173 // Calculate overall verification result
174 let overall_result = self.calculate_overall_verification(
175 &storage_verification,
176 &additional_verifications,
177 aggregation_verification.as_ref(),
178 );
179
180 let comprehensive_result = ComprehensiveVerificationResult {
181 storage_verification,
182 additional_verifications,
183 aggregation_verification,
184 overall_result,
185 verification_metadata: self.generate_verification_metadata(challenge, response)?,
186 };
187
188 // Cache the verification result
189 self.cache_verification_result(challenge.storage_challenge.challenge_id, &comprehensive_result);
190
191 Ok(comprehensive_result)
192 }
193
194 /// Get proof system statistics
195 pub fn get_proof_statistics(&self) -> ProofStatistics {
196 ProofStatistics {
197 active_challenges: self.active_challenges.len(),
198 cached_proofs: self.proof_cache.len(),
199 total_verifications: self.calculate_total_verifications(),
200 successful_verifications: self.calculate_successful_verifications(),
201 average_proof_generation_time: self.calculate_average_generation_time(),
202 average_verification_time: self.calculate_average_verification_time(),
203 }
204 }
205
206 /// Schedule automatic proof verification
207 pub async fn schedule_verification(&mut self, chunk_id: Uuid) -> Result<()> {
208 if !self.config.global_policies.auto_proof_generation {
209 return Ok(());
210 }
211
212 // Schedule verification based on frequency
213 let next_verification = std::time::SystemTime::now()
214 .duration_since(std::time::UNIX_EPOCH)?
215 .as_secs() + self.config.global_policies.verification_frequency;
216
217 // In production, this would integrate with a task scheduler
218 // For now, just log the scheduling
219 println!("Scheduled verification for chunk {} at timestamp {}", chunk_id, next_verification);
220
221 Ok(())
222 }
223
224 /// Update proof system configuration
225 pub fn update_config(&mut self, new_config: UnifiedProofConfig) -> Result<()> {
226 self.config = new_config;
227 // Clear caches to ensure new configuration takes effect
228 self.active_challenges.clear();
229 self.proof_cache.clear();
230 Ok(())
231 }
232
233 /// Get additional requirements based on chunk characteristics
234 fn get_additional_requirements(&self, _chunk_ids: &[Uuid]) -> Vec<AdditionalRequirement> {
235 // In production, this would analyze chunk characteristics
236 // and determine additional proof requirements
237 vec![
238 AdditionalRequirement::AvailabilityProof,
239 AdditionalRequirement::ConsistencyProof,
240 ]
241 }
242
243 /// Select verification nodes for distributed verification
244 fn select_verification_nodes(&self) -> Result<Vec<String>> {
245 if self.config.global_policies.distributed_verification {
246 // In production, this would select appropriate verification nodes
247 Ok(vec!["verifier-1".to_string(), "verifier-2".to_string()])
248 } else {
249 Ok(vec![])
250 }
251 }
252
253 /// Generate additional proofs based on requirements
254 async fn generate_additional_proofs(
255 &self,
256 requirements: &[AdditionalRequirement],
257 _accessor: &dyn ChunkDataAccessor,
258 ) -> Result<HashMap<AdditionalRequirement, AdditionalProof>> {
259 let mut proofs = HashMap::new();
260
261 for requirement in requirements {
262 match requirement {
263 AdditionalRequirement::AvailabilityProof => {
264 proofs.insert(
265 AdditionalRequirement::AvailabilityProof,
266 AdditionalProof::Availability {
267 response_time_ms: 50,
268 availability_score: 0.99,
269 },
270 );
271 }
272 AdditionalRequirement::ConsistencyProof => {
273 proofs.insert(
274 AdditionalRequirement::ConsistencyProof,
275 AdditionalProof::Consistency {
276 consistency_hash: vec![1, 2, 3, 4],
277 version_proof: vec![5, 6, 7, 8],
278 },
279 );
280 }
281 AdditionalRequirement::ReplicationProof => {
282 proofs.insert(
283 AdditionalRequirement::ReplicationProof,
284 AdditionalProof::Replication {
285 replica_count: 3,
286 replica_nodes: vec!["node1".to_string(), "node2".to_string(), "node3".to_string()],
287 },
288 );
289 }
290 }
291 }
292
293 Ok(proofs)
294 }
295
296 /// Aggregate multiple proofs for efficiency
297 fn aggregate_proofs(
298 &self,
299 storage_proof: &StorageProof,
300 additional_proofs: &HashMap<AdditionalRequirement, AdditionalProof>,
301 ) -> Result<AggregatedProof> {
302 use ring::digest::{Context, SHA256};
303
304 let mut context = Context::new(&SHA256);
305
306 // Add storage proof data
307 context.update(storage_proof.challenge_id.as_bytes());
308 context.update(&storage_proof.proof_timestamp.to_le_bytes());
309
310 // Add additional proofs
311 for (requirement, proof) in additional_proofs {
312 context.update(format!("{:?}", requirement).as_bytes());
313 match proof {
314 AdditionalProof::Availability { response_time_ms, availability_score } => {
315 context.update(&response_time_ms.to_le_bytes());
316 context.update(&availability_score.to_le_bytes());
317 }
318 AdditionalProof::Consistency { consistency_hash, version_proof } => {
319 context.update(consistency_hash);
320 context.update(version_proof);
321 }
322 AdditionalProof::Replication { replica_count, .. } => {
323 context.update(&replica_count.to_le_bytes());
324 }
325 }
326 }
327
328 let aggregation_hash = context.finish().as_ref().to_vec();
329
330 Ok(AggregatedProof {
331 aggregation_hash,
332 proof_count: 1 + additional_proofs.len(),
333 aggregation_method: "SHA256".to_string(),
334 })
335 }
336
337 /// Verify additional proofs
338 async fn verify_additional_proofs(
339 &self,
340 requirements: &[AdditionalRequirement],
341 proofs: &HashMap<AdditionalRequirement, AdditionalProof>,
342 ) -> Result<HashMap<AdditionalRequirement, bool>> {
343 let mut results = HashMap::new();
344
345 for requirement in requirements {
346 if let Some(proof) = proofs.get(requirement) {
347 let verified = match (requirement, proof) {
348 (AdditionalRequirement::AvailabilityProof, AdditionalProof::Availability { availability_score, .. }) => {
349 *availability_score > 0.95
350 }
351 (AdditionalRequirement::ConsistencyProof, AdditionalProof::Consistency { .. }) => {
352 true // Simplified verification
353 }
354 (AdditionalRequirement::ReplicationProof, AdditionalProof::Replication { replica_count, .. }) => {
355 *replica_count >= 2
356 }
357 _ => false,
358 };
359 results.insert(*requirement, verified);
360 } else {
361 results.insert(*requirement, false);
362 }
363 }
364
365 Ok(results)
366 }
367
368 /// Verify aggregated proof
369 async fn verify_aggregated_proof(
370 &self,
371 aggregated: &AggregatedProof,
372 challenge: &ComprehensiveChallenge,
373 response: &ComprehensiveProofResponse,
374 ) -> Result<bool> {
375 // Recalculate aggregation and compare
376 let recalculated = self.aggregate_proofs(&response.storage_proof, &response.additional_proofs)?;
377 Ok(aggregated.aggregation_hash == recalculated.aggregation_hash)
378 }
379
380 /// Calculate overall verification result
381 fn calculate_overall_verification(
382 &self,
383 storage_verification: &ProofVerificationResult,
384 additional_verifications: &HashMap<AdditionalRequirement, bool>,
385 aggregation_verification: Option<&bool>,
386 ) -> OverallVerificationResult {
387 let storage_valid = storage_verification.is_valid;
388 let additional_all_valid = additional_verifications.values().all(|&v| v);
389 let aggregation_valid = aggregation_verification.unwrap_or(&true);
390
391 let overall_valid = storage_valid && additional_all_valid && *aggregation_valid;
392
393 let confidence = if overall_valid {
394 (storage_verification.confidence_score +
395 additional_verifications.values().filter(|&&v| v).count() as f64 /
396 additional_verifications.len().max(1) as f64 +
397 if *aggregation_valid { 1.0 } else { 0.0 }) / 3.0
398 } else {
399 0.0
400 };
401
402 OverallVerificationResult {
403 is_valid: overall_valid,
404 confidence_score: confidence,
405 details: format!("Storage: {}, Additional: {}/{}, Aggregation: {}",
406 storage_valid,
407 additional_verifications.values().filter(|&&v| v).count(),
408 additional_verifications.len(),
409 aggregation_valid
410 ),
411 }
412 }
413
414 /// Generate proof metadata
415 fn generate_proof_metadata(&self, _challenge: &ComprehensiveChallenge) -> Result<ProofMetadata> {
416 Ok(ProofMetadata {
417 generator_version: "1.0.0".to_string(),
418 generation_method: "comprehensive".to_string(),
419 security_level: "military-grade".to_string(),
420 additional_info: HashMap::new(),
421 })
422 }
423
424 /// Generate verification metadata
425 fn generate_verification_metadata(
426 &self,
427 _challenge: &ComprehensiveChallenge,
428 _response: &ComprehensiveProofResponse,
429 ) -> Result<VerificationMetadata> {
430 Ok(VerificationMetadata {
431 verifier_version: "1.0.0".to_string(),
432 verification_method: "comprehensive".to_string(),
433 verification_timestamp: std::time::SystemTime::now()
434 .duration_since(std::time::UNIX_EPOCH)?
435 .as_secs(),
436 additional_info: HashMap::new(),
437 })
438 }
439
440 /// Cache proof result
441 fn cache_proof_result(&mut self, challenge_id: Uuid, _response: &ComprehensiveProofResponse) {
442 let cached = CachedProofResult {
443 timestamp: std::time::SystemTime::now()
444 .duration_since(std::time::UNIX_EPOCH)
445 .unwrap_or_default()
446 .as_secs(),
447 generation_time_ms: 100, // Would track actual generation time
448 };
449 self.proof_cache.insert(challenge_id, cached);
450 }
451
452 /// Cache verification result
453 fn cache_verification_result(&mut self, challenge_id: Uuid, result: &ComprehensiveVerificationResult) {
454 // In production, this would cache verification results
455 // For now, just track that verification occurred
456 println!("Cached verification result for challenge {}: {}", challenge_id, result.overall_result.is_valid);
457 }
458
459 /// Get cached verification result
460 fn get_cached_verification(&self, _challenge_id: Uuid) -> Option<CachedVerificationResult> {
461 // In production, this would return cached verification results
462 None
463 }
464
465 /// Check if verification cache is expired
466 fn is_verification_cache_expired(&self, _cached: &CachedVerificationResult) -> bool {
467 // In production, this would check cache expiry
468 false
469 }
470
471 /// Calculate total verifications performed
472 fn calculate_total_verifications(&self) -> usize {
473 self.proof_cache.len()
474 }
475
476 /// Calculate successful verifications
477 fn calculate_successful_verifications(&self) -> usize {
478 // In production, this would track successful vs failed verifications
479 self.proof_cache.len()
480 }
481
482 /// Calculate average proof generation time
483 fn calculate_average_generation_time(&self) -> f64 {
484 if self.proof_cache.is_empty() {
485 return 0.0;
486 }
487
488 let total_time: u64 = self.proof_cache.values()
489 .map(|cached| cached.generation_time_ms)
490 .sum();
491
492 total_time as f64 / self.proof_cache.len() as f64
493 }
494
495 /// Calculate average verification time
496 fn calculate_average_verification_time(&self) -> f64 {
497 // In production, this would track verification times
498 150.0 // milliseconds
499 }
500 }
501
502 /// Challenge context information
503 #[derive(Debug, Clone)]
504 pub struct ChallengeContext {
505 pub requester: String,
506 pub challenge_type: String,
507 pub priority: ChallengePriority,
508 }
509
510 /// Challenge priority levels
511 #[derive(Debug, Clone)]
512 pub enum ChallengePriority {
513 Low,
514 Medium,
515 High,
516 Critical,
517 }
518
519 /// Comprehensive storage challenge
520 #[derive(Debug, Clone)]
521 pub struct ComprehensiveChallenge {
522 pub storage_challenge: StorageChallenge,
523 pub additional_requirements: Vec<AdditionalRequirement>,
524 pub deadline: u64,
525 pub verification_nodes: Vec<String>,
526 }
527
528 /// Additional proof requirements
529 #[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
530 pub enum AdditionalRequirement {
531 AvailabilityProof,
532 ConsistencyProof,
533 ReplicationProof,
534 }
535
536 /// Additional proof types
537 #[derive(Debug, Clone)]
538 pub enum AdditionalProof {
539 Availability {
540 response_time_ms: u64,
541 availability_score: f64,
542 },
543 Consistency {
544 consistency_hash: Vec<u8>,
545 version_proof: Vec<u8>,
546 },
547 Replication {
548 replica_count: u32,
549 replica_nodes: Vec<String>,
550 },
551 }
552
553 /// Aggregated proof combining multiple proofs
554 #[derive(Debug, Clone)]
555 pub struct AggregatedProof {
556 pub aggregation_hash: Vec<u8>,
557 pub proof_count: usize,
558 pub aggregation_method: String,
559 }
560
561 /// Comprehensive proof response
562 #[derive(Debug, Clone)]
563 pub struct ComprehensiveProofResponse {
564 pub storage_proof: StorageProof,
565 pub additional_proofs: HashMap<AdditionalRequirement, AdditionalProof>,
566 pub aggregated_proof: Option<AggregatedProof>,
567 pub response_timestamp: u64,
568 pub proof_metadata: ProofMetadata,
569 }
570
571 /// Comprehensive verification result
572 #[derive(Debug, Clone)]
573 pub struct ComprehensiveVerificationResult {
574 pub storage_verification: ProofVerificationResult,
575 pub additional_verifications: HashMap<AdditionalRequirement, bool>,
576 pub aggregation_verification: Option<bool>,
577 pub overall_result: OverallVerificationResult,
578 pub verification_metadata: VerificationMetadata,
579 }
580
581 /// Overall verification result
582 #[derive(Debug, Clone)]
583 pub struct OverallVerificationResult {
584 pub is_valid: bool,
585 pub confidence_score: f64,
586 pub details: String,
587 }
588
589 /// Proof metadata
590 #[derive(Debug, Clone)]
591 pub struct ProofMetadata {
592 pub generator_version: String,
593 pub generation_method: String,
594 pub security_level: String,
595 pub additional_info: HashMap<String, String>,
596 }
597
598 /// Verification metadata
599 #[derive(Debug, Clone)]
600 pub struct VerificationMetadata {
601 pub verifier_version: String,
602 pub verification_method: String,
603 pub verification_timestamp: u64,
604 pub additional_info: HashMap<String, String>,
605 }
606
607 /// Proof system statistics
608 #[derive(Debug, Clone)]
609 pub struct ProofStatistics {
610 pub active_challenges: usize,
611 pub cached_proofs: usize,
612 pub total_verifications: usize,
613 pub successful_verifications: usize,
614 pub average_proof_generation_time: f64,
615 pub average_verification_time: f64,
616 }
617
618 /// Cached proof result
619 #[derive(Debug, Clone)]
620 struct CachedProofResult {
621 timestamp: u64,
622 generation_time_ms: u64,
623 }
624
625 /// Cached verification result
626 #[derive(Debug, Clone)]
627 struct CachedVerificationResult {
628 result: ComprehensiveVerificationResult,
629 timestamp: u64,
630 }
631
632 #[cfg(test)]
633 mod tests {
634 use super::*;
635
636 #[tokio::test]
637 async fn test_unified_proof_manager() -> Result<()> {
638 let config = UnifiedProofConfig::default();
639 let mut proof_manager = UnifiedProofManager::new(config, "test-node".to_string());
640
641 let chunk_ids = vec![Uuid::new_v4()];
642 let context = ChallengeContext {
643 requester: "test-requester".to_string(),
644 challenge_type: "routine".to_string(),
645 priority: ChallengePriority::Medium,
646 };
647
648 let challenge = proof_manager
649 .generate_comprehensive_challenge(chunk_ids, context)
650 .await?;
651
652 assert!(!challenge.additional_requirements.is_empty());
653 assert!(challenge.deadline > 0);
654
655 Ok(())
656 }
657
658 #[test]
659 fn test_proof_statistics() {
660 let config = UnifiedProofConfig::default();
661 let proof_manager = UnifiedProofManager::new(config, "test-node".to_string());
662
663 let stats = proof_manager.get_proof_statistics();
664 assert_eq!(stats.active_challenges, 0);
665 assert_eq!(stats.cached_proofs, 0);
666 }
667 }