7efe8bbfbf
Security Fixes: - CVE-2024-45339: Add O_EXCL flag to temp file creation in storage_write_entries() Prevents symlink attacks on predictable .tmp file paths - CVE-2025-47290: Use openat_nofollow() in storage_open() Closes TOCTOU race condition via path_sanitizer infrastructure - CVE-2025-0838: Add MAX_BATCH_SIZE=10000 to add_tasks() Prevents integer overflow in batch operations Research Trustworthiness (dataset_hash): - Deterministic file ordering: std::sort after collect_files() - Recursive directory traversal: depth-limited with cycle detection - Documented exclusions: hidden files and special files noted in API Bug Fixes: - R1: storage_init path validation for non-existent directories - R2: safe_strncpy return value check before strcat - R3: parallel_hash 256-file cap replaced with std::vector - R4: wire qi_compact_index/qi_rebuild_index stubs - R5: CompletionLatch race condition fix (hold mutex during decrement) - R6: ARMv8 SHA256 transform fix (save abcd_pre before vsha256hq_u32) - R7: fuzz_index_storage header format fix - R8: enforce null termination in add_tasks/update_tasks - R9: use 64 bytes (not 65) in combined hash to exclude null terminator - R10: status field persistence in save() New Tests: - test_recursive_dataset.cpp: Verify deterministic recursive hashing - test_storage_symlink_resistance.cpp: Verify CVE-2024-45339 fix - test_queue_index_batch_limit.cpp: Verify CVE-2025-0838 fix - test_sha256_arm_kat.cpp: ARMv8 known-answer tests - test_storage_init_new_dir.cpp: F1 verification - test_parallel_hash_large_dir.cpp: F3 verification - test_queue_index_compact.cpp: F4 verification All 8 native tests passing. Library ready for research lab deployment.
47 lines
1.5 KiB
C++
47 lines
1.5 KiB
C++
#include "sha256_base.h"
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// Intel SHA-NI (SHA Extensions) implementation
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#if defined(__x86_64__) || defined(_M_X64)
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#include <cpuid.h>
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#include <immintrin.h>
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// TODO: Full SHA-NI implementation using:
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// _mm_sha256msg1_epu32, _mm_sha256msg2_epu32 for message schedule
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// _mm_sha256rnds2_epu32 for rounds
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// For now, falls back to generic (implementation placeholder)
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static void transform_sha_ni(uint32_t* state, const uint8_t* data) {
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// Placeholder: full implementation would use SHA-NI intrinsics
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// This requires message scheduling with sha256msg1/sha256msg2
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// and rounds with sha256rnds2
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transform_generic(state, data);
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}
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TransformFunc detect_x86_transform(void) {
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// Fix: Return nullptr until real SHA-NI implementation exists
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// The placeholder transform_sha_ni() just calls transform_generic(),
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// which would falsely report "SHA-NI" when it's actually generic.
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//
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// TODO: Implement real SHA-NI using:
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// _mm_sha256msg1_epu32, _mm_sha256msg2_epu32 for message schedule
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// _mm_sha256rnds2_epu32 for rounds
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// Then enable this detection.
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(void)transform_sha_ni; // Suppress unused function warning
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return nullptr;
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/* Full implementation when ready:
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unsigned int eax, ebx, ecx, edx;
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if (__get_cpuid(7, &eax, &ebx, &ecx, &edx)) {
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if (ebx & (1 << 29)) { // SHA bit
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return transform_sha_ni;
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}
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}
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return nullptr;
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*/
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}
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#else // No x86 support
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TransformFunc detect_x86_transform(void) { return nullptr; }
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#endif
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