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- void hashlib_HMACSha256Final(hmac_ctx* hmac, uint8_t *output){
- uint8_t tmpbuf[32];
- hmac_ctx tmp;
- memcpy(&tmp, hmac, sizeof(tmp));
- hashlib_Sha256Final( &tmp.sha256_ctx, tmpbuf );
- hashlib_Sha256Init( &tmp.sha256_ctx);
- hashlib_Sha256Update( &tmp.sha256_ctx, hmac->opad, 64 );
- hashlib_Sha256Update( &tmp.sha256_ctx, tmpbuf, 32);
- hashlib_Sha256Final( &tmp.sha256_ctx, output );
- }
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