refactor!: MbedTLS on Windows, switch to uint32

1 files changed, 73 insertions, 0 deletions

diff --git a/src/crypto/nc-crypto.h b/src/crypto/nc-crypto.h
new file mode 100644
index 0000000..64d4ad8
--- /dev/null
+++ b/src/crypto/nc-crypto.h
@@ -0,0 +1,73 @@
+
+/*
+* Copyright (c) 2024 Vaughn Nugent
+*
+* Package: noscrypt
+* File: nc-crypto.h
+*
+* 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/.
+*/
+
+#pragma once
+
+#ifndef _NC_CRYPTO_H
+#define _NC_CRYPTO_H
+
+#include <stdint.h>
+
+#define CHACHA_NONCE_SIZE		0x0cu		/* Size of 12 is set by the cipher spec */
+#define CHACHA_KEY_SIZE			0x20u		/* Size of 32 is set by the cipher spec */
+#define SHA256_DIGEST_SIZE		0x20u		/* Size of 32 is set by the cipher spec */
+
+typedef uint8_t cstatus_t;
+#define CSTATUS_OK				((cstatus_t)0x01u)
+#define CSTATUS_FAIL			((cstatus_t)0x00u)
+
+typedef uint8_t sha256_t[SHA256_DIGEST_SIZE];
+
+/*
+* IMPORTANT:
+*	The HKDF_IN_BUF_SIZE defintion sets the internal stack buffer size to use
+*	during fallback HKDF_Expand operations.
+*
+*	128 bytes should be more than enough for most use cases, without going 
+*	overboard. Could be dialed in better for specific use cases later.
+*/
+
+#ifndef HKDF_IN_BUF_SIZE
+	#define HKDF_IN_BUF_SIZE	0x80	
+#endif
+
+
+uint32_t ncCryptoFixedTimeComp(const uint8_t* a, const uint8_t* b, uint32_t size);
+
+void ncCryptoSecureZero(void* ptr, uint32_t size);
+
+cstatus_t ncCryptoDigestSha256(const cspan_t* data, sha256_t digestOut32);
+
+cstatus_t ncCryptoHmacSha256(const cspan_t* key, const cspan_t* data, sha256_t hmacOut32);
+
+cstatus_t ncCryptoSha256HkdfExpand(const cspan_t* prk, const cspan_t* info, span_t* okm);
+
+cstatus_t ncCryptoSha256HkdfExtract(const cspan_t* salt, const cspan_t* ikm, sha256_t prk);
+
+cstatus_t ncCryptoChacha20(
+	const uint8_t key[CHACHA_KEY_SIZE],
+	const uint8_t nonce[CHACHA_NONCE_SIZE],
+	const uint8_t* input,
+	uint8_t* output,
+	uint32_t dataSize
+);
+
+#endif /* !_NC_CRYPTO_H */