fuzz: Differential fuzzing to compare Bitcoin Core’s and D. J. Bernstein’s implementation of ChaCha20 #22704

pull stratospher wants to merge 2 commits into bitcoin:master from stratospher:diff-fuzz-chacha20 changing 2 files +331 −0
  1. stratospher commented at 7:28 pm on August 14, 2021: contributor
    This PR compares Bitcoin Core’s implementation of ChaCha20 with D. J. Bernstein’s in order to find implementation discrepancies if any.
  2. dhruv commented at 7:38 pm on August 14, 2021: member

    Concept ACK.

    We have to implement crypto ourselves to keep the surface area small and avoid bringing in large dependencies. Differential fuzzing against a reference implementation is a great addition to testing the reference test vectors.

    Thank you for your work, and welcome to Bitcoin Core!

  3. DrahtBot added the label Build system on Aug 14, 2021
  4. fanquake removed the label Build system on Aug 15, 2021
  5. fanquake added the label Tests on Aug 15, 2021
  6. fanquake requested review from MarcoFalke on Aug 15, 2021
  7. fanquake commented at 3:28 am on August 15, 2021: member
    @agroce / @guidovranken this may also interest you.
  8. guidovranken commented at 3:48 am on August 15, 2021: contributor

    Essentially this is already done by Cryptofuzz which compares it against the Botan implementation, and is running on OSS-Fuzz in the bitcoin-core project

    https://github.com/guidovranken/cryptofuzz/blob/6dddb6bb97a2cd8d7bf915bca00d0411ccf5e1c0/modules/bitcoin/module.cpp#L417-L420

  9. stratospher commented at 6:48 pm on August 19, 2021: contributor

    Oh..I wasn’t aware of the differential fuzzing for Bitcoin Core cryptographic libraries being done in Cryptofuzz. Crypofuzz is an incredible project! Could you please elaborate more on where the comparison with Botan implementation is happening?

    Would there be incremental value in fuzzing against D.J. Bernstein’s reference implementation? And including the Keystream() function too in the Bitcoin Core/Cryptofuzz diferential fuzz tests?

  10. in src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:292 in a637734393 outdated 
    287+        // ECRYPT_keysetup() doesn't set the counter and nonce to 0 while SetKey() does
288+        uint8_t iv[8] = {0, 0, 0, 0, 0, 0, 0, 0};
289+        ECRYPT_ivsetup(&ctx, iv);
290+    }
291+
292+    while (fuzzed_data_provider.ConsumeIntegralInRange<uint32_t>(0, 100) >= 10) {
    MarcoFalke commented at 6:59 pm on August 19, 2021:

    how is this different from

    0    while (fuzzed_data_provider.ConsumeBool()) {

    Also, could use LIMITED_WHILE to avoid unlimited runtime.

    prakash1512 commented at 6:37 am on August 20, 2021:

    how is this different from

    Increased the probability of entering the while loop as ConsumeBool() has only 50% chance of returning true while ConsumeIntegralInRange<uint32_t>(0,100) >= 10 will have 90% chance of returning true. Essentially we’re trying to get the test running longer for each fuzz seed so multiple functions are exercised per seed, especially since ChaCha20 maintains an internal state for each seed.

    stratospher commented at 6:57 am on August 20, 2021:

    Also, could use LIMITED_WHILE to avoid unlimited runtime.

    Great suggestion! Added LIMITED_WHILE.

    MarcoFalke commented at 7:38 am on August 20, 2021:

    Essentially we’re trying to get the test running longer

    Do you have data to support that claim? Fuzzing engines will store inputs that increase coverage data and once the data is stored, for replay it doesn’t matter whether it was ConsumeBool or ConsumeIntegralInRange that evaluated to true.

    prakash1512 commented at 9:25 pm on August 20, 2021:

    Do you have data to support that claim?

    Backing the claim with data was indeed a great suggestion, so we generated the data and plots to verify it. Now we have results to dismiss that claim :) Sharing our findings here:

    x-axis denotes no of iterations y-axis denotes frequency of each iteration

  11. MarcoFalke commented at 7:00 pm on August 19, 2021: member
    See also #19920
  12. MarcoFalke commented at 7:02 pm on August 19, 2021: member
    btw, I don’t mind adding the fuzz test here, even if it is redundant with oss-fuzz. Oss-fuzz is just one fuzzing providre, but I also run my own fuzzing servers to not put all eggs into one basket. I am sure others are running the Bitcoin Core fuzz target, too.
  13. dhruv commented at 7:06 pm on August 19, 2021: member
    +1 for what @MarcoFalke said. It’d be nice to be able to run this along with other fuzz targets on personal machines.
  14. practicalswift commented at 9:18 pm on August 19, 2021: contributor
    Concept ACK for the reasons @MarcoFalke mentioned
  15. agroce commented at 10:34 pm on August 19, 2021: contributor
    There are fuzzers (e.g. #22585) not available via OSS-Fuzz, also.
  16. stratospher force-pushed on Aug 20, 2021
  17. stratospher force-pushed on Aug 20, 2021
  18. stratospher commented at 4:52 am on October 14, 2021: contributor
    Added LIMITED_WHILE and updated ConsumeIntegralInRange() to ConsumeBool() as per discussion in comments. Ready for further review.
  19. DrahtBot commented at 4:20 pm on October 21, 2021: member

    The following sections might be updated with supplementary metadata relevant to reviewers and maintainers.

    Conflicts

    Reviewers, this pull request conflicts with the following ones:

    • #23441 (fuzz: Differential fuzzing for ChaCha20Forward4064-Poly1305@bitcoin cipher suite by stratospher)
    • #23322 ([Fuzz] Poly1305 differential fuzzing against Floodyberry’s implementation by prakash1512)

    If you consider this pull request important, please also help to review the conflicting pull requests. Ideally, start with the one that should be merged first.

  20. in src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:45 in 258d751c1c outdated 
    40+        (p)[3] = U8V((v) >> 24); \
41+    } while (0)
42+
43+/* ------------------------------------------------------------------------- */
44+/* Data structures */
45+
    siv2r commented at 8:34 pm on November 27, 2021:

    nit: it might be useful to add the definition of ENCRYPT_ctx in the comments.

    0/* 
1 * ECRYPT_ctx is the structure containing the representation of the
2 * internal state of your cipher. 
3 */
    stratospher commented at 6:19 am on December 4, 2021:
    I’d like to keep D. J. Bernstein’s reference implementation of ChaCha20 as such.
  21. in src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:93 in 258d751c1c outdated 
    92+    d = ROTATE(XOR(d, a), 8);    \
93+    c = PLUS(c, d);              \
94+    b = ROTATE(XOR(b, c), 7);
95+
96+static const char sigma[] = "expand 32-byte k";
97+static const char tau[] = "expand 16-byte k";
    siv2r commented at 8:50 pm on November 27, 2021: 
    0static const char sigma[16] = "expand 32-byte k";
1static const char tau[16] = "expand 16-byte k";
    stratospher commented at 6:19 am on December 4, 2021:
    Since this is actually 16 characters + ‘\0’, we’d have to put a number ≥17. There’s a discussion here which talks about the change needed in the reference implementation. This is the only place where such a change was made.
    siv2r commented at 3:19 pm on December 4, 2021:
    Ah, I see. Thanks!
  22. in src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:94 in 258d751c1c outdated 
    89+    c = PLUS(c, d);              \
90+    b = ROTATE(XOR(b, c), 12);   \
91+    a = PLUS(a, b);              \
92+    d = ROTATE(XOR(d, a), 8);    \
93+    c = PLUS(c, d);              \
94+    b = ROTATE(XOR(b, c), 7);
    siv2r commented at 10:20 pm on November 27, 2021: 
    0    a = PLUS(a, b); d = ROTATE(XOR(d, a), 16);   \
1    c = PLUS(c, d); b = ROTATE(XOR(b, c), 12);   \
2    a = PLUS(a, b); d = ROTATE(XOR(d, a), 8);    \
3    c = PLUS(c, d); b = ROTATE(XOR(b, c), 7);

    nit: this pattern of defining the QUATERROUND macro is following in many places (chacha20.cpp).

    stratospher commented at 6:19 am on December 4, 2021:
    Thanks! I’ve made the changes.
  23. siv2r commented at 10:28 pm on November 27, 2021: none

    utACK 258d751. I compared this code change against DJ Bernstein’s chacha20 implementation. The changes look good!

    I am yet to test the changes on my local machine. Feel free to ignore the nits that I suggested :)

  24. siv2r commented at 10:28 pm on November 27, 2021: none

    utACK 258d751. I compared this code change against DJ Bernstein’s chacha20 implementation. The changes look good!

    I am yet to test the changes on my local machine. Feel free to ignore the nits that I suggested :)

  25. stratospher force-pushed on Dec 4, 2021
  26. stratospher commented at 6:20 am on December 4, 2021: contributor
    Addressed #22704(comment). (Thanks @siv2r!) Ready for further review.
  27. laanwj commented at 9:32 pm on December 10, 2021: member
    You might want to set a different author name for your commits than “root” if you want to be credited properly in the release notes.
  28. [fuzz] Add D. J. Bernstein's implementation of ChaCha20 
    Co-authored-by: Prakash Choudhary <44579179+prakash1512@users.noreply.github.com>
    65ef93203c
  29. [fuzz] Add fuzzing harness to compare both implementations of ChaCha20 
    Co-authored-by: Prakash Choudhary <44579179+prakash1512@users.noreply.github.com>
    4d0ac72f3a
  30. stratospher force-pushed on Dec 11, 2021
  31. stratospher commented at 3:12 am on December 11, 2021: contributor

    You might want to set a different author name for your commits than “root” if you want to be credited properly in the release notes.

    Thank you for letting me know! I’ve updated the author name.

  32. laanwj commented at 3:53 pm on December 17, 2021: member
    Code review ACK 4d0ac72f3ae78e3c6a0d5dc4f7e809583abd0546
  33. laanwj merged this on Dec 17, 2021
  34. laanwj closed this on Dec 17, 2021
  35. in src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:318 in 4d0ac72f3a 
    313+                std::vector<uint8_t> output(integralInRange);
314+                chacha20.Keystream(output.data(), output.size());
315+                std::vector<uint8_t> djb_output(integralInRange);
316+                ECRYPT_keystream_bytes(&ctx, djb_output.data(), djb_output.size());
317+                if (output.data() != NULL && djb_output.data() != NULL) {
318+                    assert(memcmp(output.data(), djb_output.data(), integralInRange) == 0);
    MarcoFalke commented at 4:02 pm on December 17, 2021:
    any reason to use a low level function, when https://en.cppreference.com/w/cpp/container/vector/operator_cmp could be used?
    stratospher commented at 5:47 pm on December 17, 2021:
    I went with this because some of the crypto unit tests used memcmp. I feel you’re right though and memcmp doesn’t really provide any added advantage.
  36. in src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:317 in 4d0ac72f3a 
    312+                uint32_t integralInRange = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 4096);
313+                std::vector<uint8_t> output(integralInRange);
314+                chacha20.Keystream(output.data(), output.size());
315+                std::vector<uint8_t> djb_output(integralInRange);
316+                ECRYPT_keystream_bytes(&ctx, djb_output.data(), djb_output.size());
317+                if (output.data() != NULL && djb_output.data() != NULL) {
    MarcoFalke commented at 4:03 pm on December 17, 2021:
    when would this fail?
    stratospher commented at 5:47 pm on December 17, 2021:
    I meant this as a check to not pass a null pointer(In a situation where integralInRange is 0) to memcmp since it would exhibit undefined behaviour. This can be removed if memcmp is removed.
  37. in src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:327 in 4d0ac72f3a 
    322+                uint32_t integralInRange = fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 4096);
323+                std::vector<uint8_t> output(integralInRange);
324+                const std::vector<uint8_t> input = ConsumeFixedLengthByteVector(fuzzed_data_provider, output.size());
325+                chacha20.Crypt(input.data(), output.data(), input.size());
326+                std::vector<uint8_t> djb_output(integralInRange);
327+                ECRYPT_encrypt_bytes(&ctx, input.data(), djb_output.data(), input.size());
    MarcoFalke commented at 4:04 pm on December 17, 2021:
    missing https://en.cppreference.com/w/cpp/container/vector/operator_cmp ?
    stratospher commented at 5:47 pm on December 17, 2021:
    Nice catch. Thanks! I can open a follow up PR to include these suggestions.
  38. stratospher commented at 5:56 pm on December 17, 2021: contributor
    Thanks for the review @MarcoFalke. I’ve opened #23806 to address your comments.
  39. sidhujag referenced this in commit 61a9614645 on Dec 18, 2021
  40. MarcoFalke referenced this in commit 98a2ddcd6e on Dec 18, 2021
  41. sidhujag referenced this in commit 946b51d208 on Dec 18, 2021
  42. MarcoFalke commented at 11:37 am on December 24, 2021: member 
     0# FUZZ=crypto_diff_fuzz_chacha20 /root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz ./scratch/fuzz_gen/code/crash-03f91945a7518033b0df73bf35c2caa452126610 
 1INFO: Running with entropic power schedule (0xFF, 100).
 2INFO: Seed: 3283247107
 3INFO: Loaded 1 modules   (306045 inline 8-bit counters): 306045 [0x55c5b9987bc0, 0x55c5b99d273d), 
 4INFO: Loaded 1 PC tables (306045 PCs): 306045 [0x55c5b99d2740,0x55c5b9e7df10), 
 5/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz: Running 1 inputs 1 time(s) each.
 6Running: ./scratch/fuzz_gen/code/crash-03f91945a7518033b0df73bf35c2caa452126610
 7test/fuzz/crypto_diff_fuzz_chacha20.cpp:179:13: runtime error: left shift of 268500992 by 8 places cannot be represented in type 'unsigned int'
 8    [#0](/bitcoin-bitcoin/0/) 0x55c5b722ff9b in ECRYPT_encrypt_bytes(ECRYPT_ctx*, unsigned char const*, unsigned char*, unsigned int) src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:179:13
 9    [#1](/bitcoin-bitcoin/1/) 0x55c5b723a342 in ECRYPT_keystream_bytes(ECRYPT_ctx*, unsigned char*, unsigned int) src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:265:5
10    [#2](/bitcoin-bitcoin/2/) 0x55c5b723a342 in crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_3::operator()() const src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:316:17
11    [#3](/bitcoin-bitcoin/3/) 0x55c5b723a342 in unsigned long CallOneOf<crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_0, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_1, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_2, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_3, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_4>(FuzzedDataProvider&, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_0, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_1, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_2, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_3, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_4) src/./test/fuzz/util.h:49:27
12    [#4](/bitcoin-bitcoin/4/) 0x55c5b72393d5 in crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>) src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:289:9
13    [#5](/bitcoin-bitcoin/5/) 0x55c5b7167628 in std::_Function_handler<void (Span<unsigned char const>), void (*)(Span<unsigned char const>)>::_M_invoke(std::_Any_data const&, Span<unsigned char const>&&) /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/std_function.h:300:2
14    [#6](/bitcoin-bitcoin/6/) 0x55c5b80f997d in std::function<void (Span<unsigned char const>)>::operator()(Span<unsigned char const>) const /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/std_function.h:688:14
15    [#7](/bitcoin-bitcoin/7/) 0x55c5b80f9628 in LLVMFuzzerTestOneInput src/test/fuzz/fuzz.cpp:91:5
16    [#8](/bitcoin-bitcoin/8/) 0x55c5b7076fb3 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x1461fb3)
17    [#9](/bitcoin-bitcoin/9/) 0x55c5b706037f in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x144b37f)
18    [#10](/bitcoin-bitcoin/10/) 0x55c5b706615c in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x145115c)
19    [#11](/bitcoin-bitcoin/11/) 0x55c5b7090d72 in main (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x147bd72)
20    [#12](/bitcoin-bitcoin/12/) 0x7f395fca90b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
21    [#13](/bitcoin-bitcoin/13/) 0x55c5b705ab0d in _start (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x1445b0d)
22
23SUMMARY: UndefinedBehaviorSanitizer: invalid-shift-base test/fuzz/crypto_diff_fuzz_chacha20.cpp:179:13 in 

    0# base64 ./scratch/fuzz_gen/code/crash-03f91945a7518033b0df73bf35c2caa452126610 
19tXRyA==
  43. in src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:302 in 4d0ac72f3a 
    297+                ECRYPT_ivsetup(&ctx, iv);
298+            },
299+            [&] {
300+                uint64_t iv = fuzzed_data_provider.ConsumeIntegral<uint64_t>();
301+                chacha20.SetIV(iv);
302+                ctx.input[14] = iv;
    MarcoFalke commented at 11:43 am on December 24, 2021: 
     0test/fuzz/crypto_diff_fuzz_chacha20.cpp:302:33: runtime error: implicit conversion from type 'uint64_t' (aka 'unsigned long') of value 270751369970 (64-bit, unsigned) to type 'u32' (aka 'unsigned int') changed the value to 168430322 (32-bit, unsigned)
 1    [#0](/bitcoin-bitcoin/0/) 0x55b2974ba838 in crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_1::operator()() const src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:302:33
 2    [#1](/bitcoin-bitcoin/1/) 0x55b2974ba838 in unsigned long CallOneOf<crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_0, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_1, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_2, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_3, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_4>(FuzzedDataProvider&, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_0, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_1, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_2, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_3, crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>)::$_4) src/./test/fuzz/util.h:49:27
 3    [#2](/bitcoin-bitcoin/2/) 0x55b2974b93d5 in crypto_diff_fuzz_chacha20_fuzz_target(Span<unsigned char const>) src/test/fuzz/crypto_diff_fuzz_chacha20.cpp:289:9
 4    [#3](/bitcoin-bitcoin/3/) 0x55b2973e7628 in std::_Function_handler<void (Span<unsigned char const>), void (*)(Span<unsigned char const>)>::_M_invoke(std::_Any_data const&, Span<unsigned char const>&&) /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/std_function.h:300:2
 5    [#4](/bitcoin-bitcoin/4/) 0x55b29837997d in std::function<void (Span<unsigned char const>)>::operator()(Span<unsigned char const>) const /usr/bin/../lib/gcc/x86_64-linux-gnu/9/../../../../include/c++/9/bits/std_function.h:688:14
 6    [#5](/bitcoin-bitcoin/5/) 0x55b298379628 in LLVMFuzzerTestOneInput src/test/fuzz/fuzz.cpp:91:5
 7    [#6](/bitcoin-bitcoin/6/) 0x55b2972f6fb3 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x1461fb3)
 8    [#7](/bitcoin-bitcoin/7/) 0x55b2972f6709 in fuzzer::Fuzzer::RunOne(unsigned char const*, unsigned long, bool, fuzzer::InputInfo*, bool, bool*) (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x1461709)
 9    [#8](/bitcoin-bitcoin/8/) 0x55b2972f7ef9 in fuzzer::Fuzzer::MutateAndTestOne() (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x1462ef9)
10    [#9](/bitcoin-bitcoin/9/) 0x55b2972f8a75 in fuzzer::Fuzzer::Loop(std::vector<fuzzer::SizedFile, std::allocator<fuzzer::SizedFile> >&) (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x1463a75)
11    [#10](/bitcoin-bitcoin/10/) 0x55b2972e6288 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x1451288)
12    [#11](/bitcoin-bitcoin/11/) 0x55b297310d72 in main (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x147bd72)
13    [#12](/bitcoin-bitcoin/12/) 0x7fcb06fc90b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
14    [#13](/bitcoin-bitcoin/13/) 0x55b2972dab0d in _start (/root/fuzz_dir/scratch/fuzz_gen/code/src/test/fuzz/fuzz+0x1445b0d)
15
16SUMMARY: UndefinedBehaviorSanitizer: implicit-unsigned-integer-truncation test/fuzz/crypto_diff_fuzz_chacha20.cpp:302:33 in 
17MS: 4 ShuffleBytes-CrossOver-ChangeBinInt-CopyPart-; base unit: 47966b9379790c601d5e098f1ba5ccae76f25861
180xf2,0xa,0xa,0xa,0x3f,0x38,0x1b,0xf4,
19\362\012\012\012?8\033\364
20artifact_prefix='./'; Test unit written to ./crash-ce471b8e19b31491ff5f4a3669aefa84b1848f06
21Base64: 8goKCj84G/Q=
  44. dhruv added this to the "Done" column in a project
  45. DrahtBot locked this on Dec 24, 2022


stratospher dhruv fanquake guidovranken MarcoFalke prakash1512 practicalswift agroce DrahtBot siv2r laanwj

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