Mbed sha256#498
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Rearrange the code slightly to match the sha256 impl.
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utack 1117e5b |
For example, mbedtls hardware hashing requires (at least) semaphore initialization/aquisition performed by sha256_init() to be done before the context is considered valid. Openssl with HW hashers is likely the same for at least some configs. so, for non-standard setups like these, avoid caching the initial bip340 tagged hash context. Many thanks to github users @advorzhak and @hazrulnizam for helping to reproduce the issue!
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Cleanups for the ccan sha code and a fix for tx_io hashing for non-default sha256 implementations (affecting taproot txs with more than 1 taproot input).