Bugfix in bn2vch: avoid excessive padding #18374
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I'm happy to add a quick test case for this, but I don't see any obvious place to put a test of the test framework itself. Any suggestions? |
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kallewoof
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Mar 18, 2020
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The following sections might be updated with supplementary metadata relevant to reviewers and maintainers. ConflictsReviewers, this pull request conflicts with the following ones:
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. |
maflcko
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Mar 18, 2020
| ext = bytearray() | ||
| if v.bit_length() > 0: | ||
| have_ext = (v.bit_length() & 0x07) == 0 | ||
| if v.bit_length() > 0 && (v.bit_length() & 0x07) == 0: |
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| if v.bit_length() > 0 && (v.bit_length() & 0x07) == 0: | |
| if v.bit_length() > 0 and (v.bit_length() & 0x07) == 0: |
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Closing in favor of #18378. |
laanwj
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Mar 19, 2020
a733ad5 Add bn2vch test to functional tests (Pieter Wuille) a3ad645 Simplify bn2vch using int.to_bytes (Pieter Wuille) Pull request description: Alternative to #18374, fixing the incorrect padding added sometimes in `bn2vch`. Since we're using Python 3.2+, a much simpler implementation of `bn2vch` is possible using `int.to_bytes`. This also adds a "functional" test for bn2vch, in a new "framework_test_script.py", where the "framework_test_" prefix is intended for tests of the framework itself. ACKs for top commit: laanwj: nice, ACK a733ad5 jnewbery: Tested ACK a733ad5. Tree-SHA512: aeacc4e7fd84279023d38e8b4a5175fb16d7b3a7f93c61b9dcb59cd9927547732983c76f28564b62e37088399fc0121b38a514d73b0ea38b3983836539e9ca90
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It seems #17319 introduced an (unobserved) bug in the test framework in
bn2vch: a zero padding byte was added for every nonzero number, even when the top byte was <= 0x7F. Fix this.