chore: Update libs, reorder files, internalize private headers

4 files changed, 0 insertions, 750 deletions

diff --git a/src/crypto/impl/bcrypt.c b/src/crypto/impl/bcrypt.c
deleted file mode 100644
index 9b01cac..0000000
--- a/src/crypto/impl/bcrypt.c
+++ /dev/null
@@ -1,263 +0,0 @@
-/*
-* Copyright (c) 2024 Vaughn Nugent
-*
-* Package: noscrypt
-* File: impl/bcrypt.c
-*
-* This library is free software; you can redistribute it and/or
-* modify it under the terms of the GNU Lesser General Public License
-* as published by the Free Software Foundation; either version 2.1
-* of the License, or  (at your option) any later version.
-*
-* This library is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-* Lesser General Public License for more details.
-*
-* You should have received a copy of the GNU Lesser General Public License
-* along with noscrypt. If not, see http://www.gnu.org/licenses/.
-*/
-
-
-/*
-*	This file provides as many fallback implementations on Windows plaforms
-*	as possible using the bcrypt library. This file should be included behind
-*	other libarry implementations, as it is a fallback.
-*/
-
-#ifdef _NC_IS_WINDOWS
-
-#define WIN32_LEAN_AND_MEAN
-#include <Windows.h>
-#include <bcrypt.h>
-
-#include "nc-util.h"
-#include "hkdf.h"
-
-#define IF_BC_FAIL(x) if(!BCRYPT_SUCCESS(x)) 
-#define BC_FAIL(x) if(!BCRYPT_SUCCESS(x)) return CSTATUS_FAIL;
-
-struct _bcrypt_ctx
-{
-	BCRYPT_ALG_HANDLE hAlg;
-	BCRYPT_HASH_HANDLE hHash;
-};
-
-_IMPLSTB NTSTATUS _bcInitSha256(struct _bcrypt_ctx* ctx, DWORD flags)
-{
-	NTSTATUS result;
-
-	result = BCryptOpenAlgorithmProvider(
-		&ctx->hAlg, 
-		BCRYPT_SHA256_ALGORITHM, 
-		NULL, 
-		flags
-	);
-
-	/*
-	*  If operation failed, ensure the algorithm handle is null
-	* to make free code easier to cleanup
-	*/
-	if (!BCRYPT_SUCCESS(result))
-	{
-		ctx->hAlg = NULL;
-	}
-
-	return result;
-}
-
-_IMPLSTB NTSTATUS _bcCreateHmac(struct _bcrypt_ctx* ctx, const cspan_t* key)
-{
-	/*
-	 * NOTE: 
-	 * I am not explicitly managing the update object buffer. By setting 
-	 * the update object to NULL, and length to 0, the buffer will be
-	 * managed by the bcrypt library.
-	 * 
-	 * See: https://learn.microsoft.com/en-us/windows/win32/api/bcrypt/nf-bcrypt-bcryptcreatehash
-	 */
-
-	return BCryptCreateHash(
-		ctx->hAlg, 
-		&ctx->hHash, 
-		NULL, 
-		0, 
-		(uint8_t*)key->data, 
-		key->size, 
-		BCRYPT_HASH_REUSABLE_FLAG	/* Enable reusable for expand function */
-	);
-}
-
-_IMPLSTB NTSTATUS _bcCreate(struct _bcrypt_ctx* ctx)
-{
-	cspan_t key;
-	
-	/* Zero out key span for 0 size and NULL data ptr */
-	SecureZeroMemory(&key, sizeof(cspan_t));
-
-	return _bcCreateHmac(ctx, &key);
-}
-
-_IMPLSTB NTSTATUS _bcHashDataRaw(const struct _bcrypt_ctx* ctx, const uint8_t* data, uint32_t len)
-{
-	return BCryptHashData(ctx->hHash, (uint8_t*)data, len, 0);
-}
-
-_IMPLSTB NTSTATUS _bcHashData(const struct _bcrypt_ctx* ctx, const cspan_t* data)
-{
-	return _bcHashDataRaw(ctx, data->data, data->size);
-}
-
-_IMPLSTB NTSTATUS _bcFinishHash(const struct _bcrypt_ctx* ctx, sha256_t digestOut32)
-{
-	return BCryptFinishHash(ctx->hHash, digestOut32, sizeof(sha256_t), 0);
-}
-
-_IMPLSTB void _bcDestroyCtx(struct _bcrypt_ctx* ctx)
-{
-	/* Free the update memory if it was allocated */
-	if(ctx->hHash) BCryptDestroyHash(ctx->hHash);
-	
-	/* Close the algorithm provider */
-	if (ctx->hAlg) BCryptCloseAlgorithmProvider(ctx->hAlg, 0);
-
-	ctx->hAlg = NULL;
-	ctx->hHash = NULL;
-}
-
-#ifndef _IMPL_SECURE_ZERO_MEMSET
-	/*
-	* On Windows, we can use SecureZeroMemory
-	* as platform zeroing function.
-	*
-	* NOTE:
-	* SecureZeroMemory2 uses volitle function argument
-	* pointers, which is a contested mehtod of compiler
-	* optimization prevention. GNU seems to oppose this method
-	*
-	* https://learn.microsoft.com/en-us/windows/win32/memory/winbase-securezeromemory2
-	*/
-	#define _IMPL_SECURE_ZERO_MEMSET SecureZeroMemory
-#endif /* !_IMPL_SECURE_ZERO_MEMSET */
-
-/*
-* Provide win32 fallback for sha256 digest if needed
-*/
-
-#ifndef _IMPL_CRYPTO_SHA256_DIGEST
-	
-	/* Export function fallack */
-	#define _IMPL_CRYPTO_SHA256_DIGEST			_bcrypt_sha256_digest	
-
-	_IMPLSTB cstatus_t _bcrypt_sha256_digest(const cspan_t* data, sha256_t digestOut32)
-	{
-		cstatus_t result;
-		struct _bcrypt_ctx ctx;
-
-		result = CSTATUS_FAIL;	/* Start in fail state */
-
-		IF_BC_FAIL(_bcInitSha256(&ctx, 0)) goto Exit;
-
-		IF_BC_FAIL(_bcCreate(&ctx)) goto Exit;
-
-		IF_BC_FAIL(_bcHashData(&ctx, data)) goto Exit;
-	
-		IF_BC_FAIL(_bcFinishHash(&ctx, digestOut32)) goto Exit;
-
-		result = CSTATUS_OK;	/* Hash operation completed, so set success */
-
-	Exit:
-
-		_bcDestroyCtx(&ctx);
-
-		return result;
-	}
-
-#endif /* !_IMPL_CRYPTO_SHA256_DIGEST */
-
-#ifndef _IMPL_CRYPTO_SHA256_HMAC
-
-	/* Export function */
-	#define _IMPL_CRYPTO_SHA256_HMAC				_bcrypt_hmac_sha256	
-	
-	_IMPLSTB cstatus_t _bcrypt_hmac_sha256(const cspan_t* key, const cspan_t* data, sha256_t hmacOut32)
-	{
-		cstatus_t result;
-		struct _bcrypt_ctx ctx;
-
-		result = CSTATUS_FAIL;		/* Start in fail state */
-
-		/* Init context with hmac flag set */
-		IF_BC_FAIL(_bcInitSha256(&ctx, BCRYPT_ALG_HANDLE_HMAC_FLAG)) goto Exit;
-
-		IF_BC_FAIL(_bcCreateHmac(&ctx, key)) goto Exit;
-
-		IF_BC_FAIL(_bcHashData(&ctx, data)) goto Exit;
-
-		IF_BC_FAIL(_bcFinishHash(&ctx, hmacOut32)) goto Exit;
-
-		result = CSTATUS_OK;	/* HMAC operation completed, so set success */
-
-	Exit:
-		
-		_bcDestroyCtx(&ctx);
-
-		return result;
-	}
-
-#endif /* !_IMPL_CRYPTO_SHA256_HMAC */
-
-/*
-* Provide a fallback HKDF expand function using the
-* HMAC function as a base.
-*/
-
-#ifndef _IMPL_CRYPTO_SHA256_HKDF_EXPAND
-
-	#define _IMPL_CRYPTO_SHA256_HKDF_EXPAND		_bcrypt_fallback_hkdf_expand
-
-	cstatus_t _bcrypt_hkdf_update(void* ctx, const cspan_t* data)
-	{
-		DEBUG_ASSERT(ctx != NULL)
-
-		BC_FAIL(_bcHashData((struct _bcrypt_ctx*)ctx, data))
-		return CSTATUS_OK;
-	}
-
-	cstatus_t _bcrypt_hkdf_finish(void* ctx, sha256_t hmacOut32)
-	{
-		DEBUG_ASSERT(ctx != NULL)
-
-		BC_FAIL(_bcFinishHash((struct _bcrypt_ctx*)ctx, hmacOut32))
-		return CSTATUS_OK;
-	}
-
-	_IMPLSTB cstatus_t _bcrypt_fallback_hkdf_expand(const cspan_t* prk, const cspan_t* info, span_t* okm)
-	{
-		cstatus_t result;
-		struct _bcrypt_ctx ctx;
-		struct nc_hkdf_fn_cb_struct handler;
-
-		handler.update = _bcrypt_hkdf_update;
-		handler.finish = _bcrypt_hkdf_finish;
-
-		/* Init bcrypt */
-		BC_FAIL(_bcInitSha256(&ctx, BCRYPT_ALG_HANDLE_HMAC_FLAG))
-
-		BC_FAIL(_bcCreateHmac(&ctx, prk))
-
-		/*
-		* NOTE! Hmac reusable flag must be set to allow for multiple
-		* calls to the finish function without losing the context.
-		*/
-
-		result = hkdfExpandProcess(&handler, &ctx, info, okm);
-
-		_bcDestroyCtx(&ctx);
-
-		return result;
-	}
-
-#endif /* !_IMPL_CRYPTO_SHA256_HKDF_EXPAND */
-
-#endif /* _NC_IS_WINDOWS */
\ No newline at end of file
diff --git a/src/crypto/impl/mbedtls.c b/src/crypto/impl/mbedtls.c
deleted file mode 100644
index df5201f..0000000
--- a/src/crypto/impl/mbedtls.c
+++ /dev/null
@@ -1,174 +0,0 @@
-/*
-* Copyright (c) 2024 Vaughn Nugent
-*
-* Package: noscrypt
-* File: mbedtls.c
-*
-* This library is free software; you can redistribute it and/or
-* modify it under the terms of the GNU Lesser General Public License
-* as published by the Free Software Foundation; either version 2.1
-* of the License, or  (at your option) any later version.
-*
-* This library is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-* Lesser General Public License for more details.
-*
-* You should have received a copy of the GNU Lesser General Public License
-* along with noscrypt. If not, see http://www.gnu.org/licenses/.
-*/
-
-
-/*
-* This file contains implemntation functions for the required 
-* cryptography primitives of noscrypt. This file stubs functionality
-* using the Mbed-TLS library, if the builder desires to link against
-* it. 
-*/
-
-#ifdef MBEDTLS_CRYPTO_LIB
-
-/* Inline errors on linux in header files on linux */
-#ifndef inline
-	#define inline __inline
-	#include <mbedtls/md.h>
-	#include <mbedtls/hkdf.h>
-	#include <mbedtls/hmac_drbg.h>
-	#include <mbedtls/sha256.h>
-	#include <mbedtls/chacha20.h>
-	#include <mbedtls/constant_time.h>
-	#undef inline
-#else
-	#include <mbedtls/md.h>
-	#include <mbedtls/hkdf.h>
-	#include <mbedtls/hmac_drbg.h>
-	#include <mbedtls/sha256.h>
-	#include <mbedtls/chacha20.h>
-	#include <mbedtls/constant_time.h>
-#endif
-
-_IMPLSTB const mbedtls_md_info_t* _mbed_sha256_alg(void)
-{
-	const mbedtls_md_info_t* info;
-	/* Get sha256 md info for hdkf operations */
-	info = mbedtls_md_info_from_type(MBEDTLS_MD_SHA256);
-	DEBUG_ASSERT2(info != NULL, "Expected SHA256 md info pointer to be valid")
-	return info;
-}
-
-#if SIZE_MAX < UINT64_MAX
-	#define _ssize_guard_int(x) if(x > SIZE_MAX) return 1;
-#else
-	#define _ssize_guard_int(x)
-#endif
-
-#ifndef _IMPL_CHACHA20_CRYPT
-	
-	/* Export chacha20 computation */
-	#define _IMPL_CHACHA20_CRYPT _mbed_chacha20_encrypt	
-
-	_IMPLSTB cstatus_t _mbed_chacha20_encrypt(
-		const uint8_t* key,
-		const uint8_t* nonce,
-		const uint8_t* input,
-		uint8_t* output,
-		uint32_t dataLen
-	)
-	{
-		_overflow_check(dataLen)
-
-		/* Counter always starts at 0 */
-		return mbedtls_chacha20_crypt(
-			key, 
-			nonce, 
-			0x00u,		/* nip-44 counter version */
-			dataLen, 
-			input, 
-			output
-		) == 0 ? CSTATUS_OK : CSTATUS_FAIL;
-	}
-
-#endif
-
-/* Export sha256 if not already defined */
-#ifndef _IMPL_CRYPTO_SHA256_DIGEST	
-	
-	#define _IMPL_CRYPTO_SHA256_DIGEST			_mbed_sha256_digest	
-
-	_IMPLSTB cstatus_t _mbed_sha256_digest(const cspan_t* data, sha256_t digestOut32)
-	{
-		_overflow_check(data->size)
-
-		return mbedtls_sha256(
-			data->data, 
-			data->size, 
-			digestOut32, 
-			0				/* Set 0 for sha256 mode */
-		) == 0 ? CSTATUS_OK : CSTATUS_FAIL;
-	}
-
-#endif
-
-/* Export Sha256 hmac if not already defined by other libs */
-#ifndef _IMPL_CRYPTO_SHA256_HMAC
-
-	#define _IMPL_CRYPTO_SHA256_HMAC			_mbed_sha256_hmac
-
-	_IMPLSTB cstatus_t _mbed_sha256_hmac(const cspan_t* key, const cspan_t* data, sha256_t hmacOut32)
-	{
-		_overflow_check(data->size)
-
-		/* Keys should never be large enough for this to matter, but sanity check. */
-		DEBUG_ASSERT2(key->size < SIZE_MAX, "Expected key size to be less than SIZE_MAX")
-
-		return mbedtls_md_hmac(
-			_mbed_sha256_alg(),
-			key->data, 
-			key->size,
-			data->data, 
-			data->size,
-			hmacOut32
-		) == 0 ? CSTATUS_OK : CSTATUS_FAIL;
-	}
-#endif
-
-/* Export hkdf expand if not already defined */
-#ifndef _IMPL_CRYPTO_SHA256_HKDF_EXPAND
-
-	#define _IMPL_CRYPTO_SHA256_HKDF_EXPAND		_mbed_sha256_hkdf_expand
-
-	_IMPLSTB cstatus_t _mbed_sha256_hkdf_expand(const cspan_t* prk, const cspan_t* info, span_t* okm)
-	{
-		/* These sizes should never be large enough to overflow on <64bit platforms, but sanity check */
-		DEBUG_ASSERT(okm->size < SIZE_MAX)
-		DEBUG_ASSERT(prk->size < SIZE_MAX)
-		DEBUG_ASSERT(info->size < SIZE_MAX)
-
-		return mbedtls_hkdf_expand(
-			_mbed_sha256_alg(),
-			prk->data, 
-			prk->size,
-			info->data, 
-			info->size,
-			okm->data, 
-			okm->size
-		) == 0 ? CSTATUS_OK : CSTATUS_FAIL;
-	}
-
-#endif
-
-/* Export fixed-time compare if not already defined */
-#ifndef _IMPL_CRYPTO_FIXED_TIME_COMPARE
-
-	#define _IMPL_CRYPTO_FIXED_TIME_COMPARE		_mbed_fixed_time_compare
-
-	/* fixed-time memcmp */
-	_IMPLSTB uint32_t _mbed_fixed_time_compare(const uint8_t* a, const uint8_t* b, uint32_t size)
-	{
-		_ssize_guard_int(size)
-
-		return (uint32_t)mbedtls_ct_memcmp(a, b, size);
-	}
-#endif
-
-#endif
\ No newline at end of file
diff --git a/src/crypto/impl/monocypher.c b/src/crypto/impl/monocypher.c
deleted file mode 100644
index 7c9faea..0000000
--- a/src/crypto/impl/monocypher.c
+++ /dev/null
@@ -1,80 +0,0 @@
-/*
-* Copyright (c) 2024 Vaughn Nugent
-*
-* Package: noscrypt
-* File: impl/monocypher.c
-*
-* This library is free software; you can redistribute it and/or
-* modify it under the terms of the GNU Lesser General Public License
-* as published by the Free Software Foundation; either version 2.1
-* of the License, or  (at your option) any later version.
-*
-* This library is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-* Lesser General Public License for more details.
-*
-* You should have received a copy of the GNU Lesser General Public License
-* along with noscrypt. If not, see http://www.gnu.org/licenses/.
-*/
-
-
-/*
-*  This file handles some fallbacks that may not be available on 
-*	some platforms. More specifically:
-*		- Secure memset 0
-* 		- Chacha20 cipher
-* 
-*/
-
-#ifdef NC_ENABLE_MONOCYPHER
-
-#include <monocypher.h>
-
-#include "nc-util.h"
-
-/* Export secure memse0 */
-#ifndef _IMPL_SECURE_ZERO_MEMSET
-
-	/* export cytpo wipe function as is */
-	#define _IMPL_SECURE_ZERO_MEMSET crypto_wipe	
-#endif
-
-/* Export Chacha20 */
-#ifndef _IMPL_CHACHA20_CRYPT
-
-	#define _IMPL_CHACHA20_CRYPT _mc_chacha20_crypt
-
-	_IMPLSTB cstatus_t _mc_chacha20_crypt(
-		const uint8_t* key,
-		const uint8_t* nonce,
-		const uint8_t* input,
-		uint8_t* output,
-		uint32_t dataLen
-	)
-	{
-		_overflow_check(dataLen)
-
-		/*
-		* Function returns the next counter value which is not
-		* needed for noscrypt as encryptions are one-shot, and 
-		* require a new nonce for each encryption.
-		* 
-		* ITEF function uses a 12byte nonce which is required for
-		* nip-44 compliant encryption.
-		*/
-		crypto_chacha20_ietf(
-			output,
-			input,
-			(size_t)dataLen,
-			key,
-			nonce,
-			0x00			/* Counter always starts at 0 */
-		);
-
-		return CSTATUS_OK;
-	}
-
-#endif
-
-#endif /* !NC_ENABLE_MONOCYPHER */
\ No newline at end of file
diff --git a/src/crypto/impl/openssl.c b/src/crypto/impl/openssl.c
deleted file mode 100644
index 132c643..0000000
--- a/src/crypto/impl/openssl.c
+++ /dev/null
@@ -1,233 +0,0 @@
-/*
-* Copyright (c) 2024 Vaughn Nugent
-*
-* Package: noscrypt
-* File: impl/openssl.c
-*
-* This library is free software; you can redistribute it and/or
-* modify it under the terms of the GNU Lesser General Public License
-* as published by the Free Software Foundation; either version 2.1
-* of the License, or  (at your option) any later version.
-*
-* This library is distributed in the hope that it will be useful,
-* but WITHOUT ANY WARRANTY; without even the implied warranty of
-* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-* Lesser General Public License for more details.
-*
-* You should have received a copy of the GNU Lesser General Public License
-* along with noscrypt. If not, see http://www.gnu.org/licenses/.
-*/
-
-
-/* Setup openssl */
-#ifdef OPENSSL_CRYPTO_LIB
-
-#include "nc-util.h"
-#include <openssl/crypto.h>
-
-#define _OSSL_FAIL(x) if(!(x)) return CSTATUS_FAIL;
-
-#ifndef _IMPL_SECURE_ZERO_MEMSET
-
-	#define _IMPL_SECURE_ZERO_MEMSET			_ossl_secure_zero_memset
-
-	_IMPLSTB void _ossl_secure_zero_memset(void* ptr, size_t size)
-	{
-		_overflow_check(size)
-
-		OPENSSL_cleanse(ptr, size);
-	}
-#endif
-
-#ifndef _IMPL_CRYPTO_FIXED_TIME_COMPARE
-
-	#define _IMPL_CRYPTO_FIXED_TIME_COMPARE		_ossl_fixed_time_compare
-
-	_IMPLSTB uint32_t _ossl_fixed_time_compare(const uint8_t* a, const uint8_t* b, uint32_t size)
-	{
-		int result;
-
-		/* Size checks are required for platforms that have integer sizes under 32bit */
-		_overflow_check(size)
-
-		result = CRYPTO_memcmp(a, b, size);
-
-		return (uint32_t)result;
-	}
-
-#endif /* _IMPL_CRYPTO_FIXED_TIME_COMPARE */
-
-
-#ifndef _IMPL_CRYPTO_SHA256_DIGEST	
-
-	#include <openssl/sha.h>
-
-	#define _IMPL_CRYPTO_SHA256_DIGEST			_ossl_sha256_digest	
-
-	_IMPLSTB cstatus_t _ossl_sha256_digest(const cspan_t* data, sha256_t digestOut32)
-	{
-		_overflow_check(data->size)
-
-		_OSSL_FAIL(SHA256(data->data, data->size, digestOut32))
-
-		return CSTATUS_OK;
-	}
-
-#endif
-
-#ifndef _IMPL_CRYPTO_SHA256_HMAC
-
-	#include <openssl/hmac.h>
-
-	/* Export function */
-	#define _IMPL_CRYPTO_SHA256_HMAC			_ossl_hmac_sha256	
-	
-	_IMPLSTB cstatus_t _ossl_hmac_sha256(const cspan_t* key, const cspan_t* data, sha256_t hmacOut32)
-	{
-		unsigned int hmacLen;
-
-		_overflow_check(key->size)
-		_overflow_check(data->size)
-
-		hmacLen = sizeof(sha256_t);
-
-		_OSSL_FAIL(
-			HMAC(
-				EVP_sha256(),
-				key->data,
-				key->size,
-				data->data,
-				data->size,
-				hmacOut32,
-				&hmacLen
-			)
-		)
-		
-		/* digest length should match the actual digest size */
-		DEBUG_ASSERT(hmacLen == sizeof(sha256_t))
-
-		return CSTATUS_OK;
-	}
-
-#endif /* !_IMPL_CRYPTO_SHA256_HMAC */
-
-#ifndef _IMPL_CRYPTO_SHA256_HKDF_EXPAND
-	
-	#include <openssl/hmac.h>
-	#include "hkdf.h"
-
-	#define _IMPL_CRYPTO_SHA256_HKDF_EXPAND		_ossl_sha256_hkdf_expand
-
-	cstatus_t _ossl_hkdf_update(void* ctx, const cspan_t* data)
-	{
-		DEBUG_ASSERT(ctx != NULL)
-
-		_overflow_check(data->size)
-
-		_OSSL_FAIL(EVP_DigestUpdate((EVP_MD_CTX*)ctx, data->data, data->size))
-		
-		return CSTATUS_OK;
-	}
-
-	cstatus_t _ossl_hkdf_finish(void* ctx, sha256_t hmacOut32)
-	{
-		unsigned int hmacSize;
-
-		DEBUG_ASSERT(ctx != NULL)
-
-		hmacSize = sizeof(sha256_t);
-
-		_OSSL_FAIL(EVP_DigestFinal_ex((EVP_MD_CTX*)ctx, hmacOut32, &hmacSize))
-
-		/* When configured for sha256, should always be the same size in/out */
-		DEBUG_ASSERT(hmacSize == sizeof(sha256_t))
-		
-		return CSTATUS_OK;
-	}
-
-	_IMPLSTB cstatus_t _ossl_sha256_hkdf_expand(const cspan_t* prk, const cspan_t* info, span_t* okm)
-	{
-		EVP_MD_CTX* ctx;
-		cstatus_t result;
-		struct nc_hkdf_fn_cb_struct handler;
-
-		result = CSTATUS_FAIL;
-	
-		/*
-		* NOTE! Hmac reusable flag must be set to allow for multiple
-		* calls to the finish function without losing the context.
-		*/
-
-		if ((ctx = EVP_MD_CTX_create()) == NULL)
-		{
-			return CSTATUS_FAIL;
-		}
-
-		if (!EVP_DigestInit_ex2(ctx, EVP_sha256(), NULL))
-		{
-			goto Cleanup;
-		}
-
-		if (!EVP_DigestUpdate(ctx, prk->data, prk->size)) 
-		{
-			goto Cleanup;
-		}
-		
-		handler.update = _ossl_hkdf_update;
-		handler.finish = _ossl_hkdf_finish;
-
-		result = hkdfExpandProcess(&handler, ctx, info, okm);
-
-	Cleanup:
-
-		EVP_MD_CTX_destroy(ctx);
-
-		return result;
-	}
-
-#endif /* !_IMPL_CRYPTO_SHA256_HKDF_EXPAND */
-
-#ifndef _IMPL_CHACHA20_CRYPT
-
-	#define _IMPL_CHACHA20_CRYPT _ossl_chacha20_crypt
-
-	_IMPLSTB cstatus_t _ossl_chacha20_crypt(
-		const uint8_t* key,
-		const uint8_t* nonce,
-		const uint8_t* input,
-		uint8_t* output,
-		uint32_t dataLen
-	)
-	{
-		cstatus_t result;
-		EVP_CIPHER_CTX* ctx;
-
-		result = CSTATUS_FAIL;
-
-		if ((ctx = EVP_CIPHER_CTX_new()) == NULL)
-		{
-			return CSTATUS_FAIL;
-		}
-
-		if (!EVP_EncryptInit_ex(ctx, EVP_chacha20(), NULL, key, nonce))
-		{
-			goto Cleanup;
-		}
-
-		if (!EVP_EncryptUpdate(ctx, output, (int*)&dataLen, input, dataLen))
-		{
-			goto Cleanup;
-		}
-
-		result = CSTATUS_OK;
-
-	Cleanup:
-
-		EVP_CIPHER_CTX_free(ctx);
-
-		return result;
-	}
-
-#endif
-
-#endif	/*!OPENSSL_CRYPTO_LIB */
\ No newline at end of file