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Add NO_WOLFSSL_SHA256_INTERLEAVE info. #120

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Oct 9, 2024
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Add NO_WOLFSSL_SHA256_INTERLEAVE info. #120

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3 changes: 3 additions & 0 deletions .gitignore
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Expand Up @@ -10,3 +10,6 @@ wolfTPM/api/
wolfTPM/wolftpm/
wolfHSM/api
wolfHSM/docs/xml

# Exclude Visual Studio Debris
**/.vs
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did you mean **/*.vs?

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No. But good question. There's a Visual Studio .vs directory with many files; it is created in not only every project directory, but also any arbitrary directory via "open with Visual Studio".

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ah ha!

2 changes: 2 additions & 0 deletions wolfSSL/src/chapter10.md
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Expand Up @@ -82,6 +82,8 @@ For **SHA-384**, the functions [`wc_InitSha384()`](group__SHA.md#function-wc_ini

For **SHA-512**, the functions [`wc_InitSha512()`](group__SHA.md#function-wc_initsha512), [`wc_Sha512Update()`](group__SHA.md#function-wc_sha512update), and [`wc_Sha512Final()`](group__SHA.md#function-wc_sha512final) will be used with the structure Sha512.

SHA interleaving (typically only of interest to hardware-acceleration that supports it) is enabled by default, define `NO_WOLFSSL_SHA256_INTERLEAVE` to disable it. Software SHA has always supported interleaving.

### BLAKE2b

To use BLAKE2b (a SHA-3 finalist) include the BLAKE2b header `wolfssl/wolfcrypt/blake2.h`. The structure to use is `Blake2b`, which is a typedef. Before using, the hash initialization must be done with the [`wc_InitBlake2b()`](group__BLAKE2.md#function-wc_initblake2b) call. Use [`wc_Blake2bUpdate()`](group__BLAKE2.md#function-wc_blake2bupdate) to update the hash and [`wc_Blake2bFinal()`](group__BLAKE2.md#function-wc_blake2bfinal) to retrieve the final hash:
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