Squashed commit of the following:

commit 942aed8a4e7c173a2c9423829c2b38087cbd49e4
Author: vnugent <public@vaughnnugent.com>
Date:   Tue Aug 6 20:54:03 2024 -0400

    chore: update changelog and mbedtls headers

commit 3b97f84fd0477eafcd6567eb8597b213e4136664
Author: vnugent <public@vaughnnugent.com>
Date:   Tue Aug 6 19:57:10 2024 -0400

    update libsecp256k1 to v0.5.1

commit 7989a2660997b909e0b99fc1dfb3bcfbb0528df3
Author: vnugent <public@vaughnnugent.com>
Date:   Tue Aug 6 19:42:25 2024 -0400

    update openssl to 3.3.1

commit e949ae5aa1fd25d4d11fe31e30b7d82ae7778dc2
Author: vnugent <public@vaughnnugent.com>
Date:   Mon Aug 5 18:01:03 2024 -0400

    fix: Find and fix openssl encryption bug

commit a60a3e1ca1d99d655c0cfc96e3952c371e8a8677
Author: vnugent <public@vaughnnugent.com>
Date:   Sun Aug 4 15:27:06 2024 -0400

    cleanup comments + return codes

commit 2aa7f4b6cdb2e0e8990e7177476f4104fd2e2b17
Author: vnugent <public@vaughnnugent.com>
Date:   Sat Jul 27 22:20:53 2024 -0400

    fix codeberg url

commit 1640f79776c6b291b49a39a6128c05888fc4153e
Author: vnugent <public@vaughnnugent.com>
Date:   Sat Jul 27 00:05:07 2024 -0400

    fix: Potential overflow in nip44 padding calculation

commit 07de078a3b5b7b0043d9f81bb5a9e750a3a0c7c1
Author: vnugent <public@vaughnnugent.com>
Date:   Fri Jul 26 23:37:15 2024 -0400

    refactor: Span invasion, checks and fix some evp api

commit 54f520e4bfc0fe23e2719d44b09739aa8709451c
Author: vnugent <public@vaughnnugent.com>
Date:   Tue Jul 23 19:55:13 2024 -0400

    latest changes

commit 12feb33dba2061415d6f39fa59dec16fafcda2a0
Author: vnugent <public@vaughnnugent.com>
Date:   Sun Jul 21 17:51:04 2024 -0400

    Push latest changes, patches, and internal upgrades

commit ffe42b6858f112a00405be4f0605ab1163063749
Author: vnugent <public@vaughnnugent.com>
Date:   Sat Jul 13 22:13:13 2024 -0400

    test: Add decryption test cases and fixes

commit 5dfafbc5a9214587533ec8b1dae2a962118d3650
Author: vnugent <public@vaughnnugent.com>
Date:   Fri Jul 12 22:14:00 2024 -0400

    feat: add decryption functionality to public api

commit 8df8c5aed4ac626171b451b5422c3b207e88000b
Author: vnugent <public@vaughnnugent.com>
Date:   Thu Jul 11 21:39:39 2024 -0400

    feat: Update sidecar utils library

commit 23fe6e8c8596333c2183f0f4389817087442c551
Author: vnugent <public@vaughnnugent.com>
Date:   Fri Jul 5 00:03:48 2024 -0400

    push latest utils and changes

commit dc71f861df8929deee300368b88ef47d45560695
Author: vnugent <public@vaughnnugent.com>
Date:   Mon Jul 1 15:05:34 2024 -0400

    fix: #7 fix confusing inline functions

commit 90166048046d2511f0bb74f8880180e82466d4c0
Author: vnugent <public@vaughnnugent.com>
Date:   Tue Jun 18 21:22:37 2024 -0400

    push pending changes

commit 461dd71069d0c0250752ac1256160605c33a6243
Author: vnugent <public@vaughnnugent.com>
Date:   Tue Jun 11 15:44:28 2024 -0400

    feat!: #4 Close #4. Add public nip04 support to api

commit a74f96251bcc81fb2c94fe75dd6f8043fd35fe0b
Merge: 1c26ef8 51d0aff
Author: vnugent <public@vaughnnugent.com>
Date:   Wed May 29 13:37:00 2024 -0400

    Merge branch 'master' into develop

commit 1c26ef86a04690120f4f752c7c5018a570ec5880
Author: vnugent <public@vaughnnugent.com>
Date:   Wed May 29 13:34:20 2024 -0400

    missed extra argument

commit 88c9095743a12cf8fc1793c607ba3a1e4fa86483
Author: vnugent <public@vaughnnugent.com>
Date:   Wed May 29 13:25:51 2024 -0400

    refactor!: return NC_SUCCESS when validating secret key

commit 718be80a4810b9352de7eb0707da54020aa6b649
Author: vnugent <public@vaughnnugent.com>
Date:   Mon May 27 14:52:41 2024 -0400

    fix: Properly build mbedtls & cmake fixes

commit a8a6efb2319f739e5faae550561dc27d9dd1e88d
Author: vnugent <public@vaughnnugent.com>
Date:   Sun May 26 17:39:40 2024 -0400

    chore: Update libs, reorder files, internalize private headers

commit 72e1b7be4031e2fd4d258fcf434ad049c0029201
Author: vnugent <public@vaughnnugent.com>
Date:   Sun May 26 13:39:08 2024 -0400

    fix: Add c++ extern prototypes in noscrypt.h

commit aeaac8d328b75911541be64d6f09d58fca294a08
Author: vnugent <public@vaughnnugent.com>
Date:   Sun May 26 11:47:17 2024 -0400

    refactor: Dep update, openssl chacha20 added

commit 86b02540cce6015cfe4a2a56499a9a2f45d4e368
Author: vnugent <public@vaughnnugent.com>
Date:   Sat May 18 12:24:17 2024 -0400

    refactor: Remove NCContext structure definition

commit d09d9330415d463ca19be9394b02ce11b3366f7e
Author: vnugent <public@vaughnnugent.com>
Date:   Mon May 13 22:33:50 2024 -0400

    fix: update mbedtls inline issue includes

commit 7838cb4bb15d4f453f92f56ece75e2b03986fe42
Author: vnugent <public@vaughnnugent.com>
Date:   Mon May 13 22:29:16 2024 -0400

    fix: force fPIC for secp256k1 targets

commit d76f7708bc6ae81a638ca708230ac9153ac754e2
Merge: aa8033d a526139
Author: vnugent <public@vaughnnugent.com>
Date:   Sun May 12 00:37:01 2024 -0400

    Merge branch 'master' into develop

commit aa8033d4dbfebeb72b6fd7a0cd218ebde0eb54dd
Author: vnugent <public@vaughnnugent.com>
Date:   Sun May 12 00:34:20 2024 -0400

    Final overview and test before tag

commit 4e3ead2cf1d3068e77f0959dfdc17e20e9102a0f
Merge: 2cee801 872c49d
Author: vnugent <public@vaughnnugent.com>
Date:   Mon May 6 22:08:09 2024 -0400

    Merge branch 'master' into develop

commit 2cee801979bfbcb3b0e53f592ce8c779b57cb679
Author: vnugent <public@vaughnnugent.com>
Date:   Mon May 6 22:02:39 2024 -0400

    Ensure static and dynamic libs get same args

commit f533694023133552d0d42933d779c95a5854343f
Author: vnugent <public@vaughnnugent.com>
Date:   Mon May 6 21:50:29 2024 -0400

    feat: CMake install & fetch-content test & updates

commit 940ff20348b13d0bc30d9e9f4289dd6de20b16ba
Author: vnugent <public@vaughnnugent.com>
Date:   Sun May 5 14:07:28 2024 -0400

    codeberg readonly push

commit b34ed055c0b7d143561ce8798e0a95313b9224bd
Merge: 0a40e20 e737556
Author: vnugent <public@vaughnnugent.com>
Date:   Sat May 4 14:06:45 2024 -0400

    Merge branch 'master' into develop

commit 0a40e209d03e8ff9b6f81cd5969d3e845c633bfc
Author: vnugent <public@vaughnnugent.com>
Date:   Sat May 4 13:55:19 2024 -0400

    ci: Force disable testing for win ci builds

commit 55fae189fffc86f07a3448370f0a746670819712
Author: vnugent <public@vaughnnugent.com>
Date:   Thu May 2 21:54:35 2024 -0400

    feat: Working and tested openssl impl & defaults

commit 6ff8bb11774c51fd341b7699a3938fd894995fbf
Author: vnugent <public@vaughnnugent.com>
Date:   Thu Apr 25 17:45:42 2024 -0400

    refactor: Finish support and testing for mbedtls

commit 7cb7a93de4f6f5e741bc5129e3d928e44f050930
Author: vnugent <public@vaughnnugent.com>
Date:   Tue Apr 23 18:19:31 2024 -0400

    refactor!: MbedTLS on Windows, switch to uint32

commit 30e8dda6cbea86bdee6d5dfe48514385d3b9f81b
Author: vnugent <public@vaughnnugent.com>
Date:   Tue Apr 23 14:48:05 2024 -0400

    refactor: Crypto dep redesign working on Windows

commit d09c6c1bd5da3e2d79351daeba304ca99976a726
Author: vnugent <public@vaughnnugent.com>
Date:   Thu Apr 18 00:28:51 2024 -0400

    refactor!: Pushing what I have to dev

commit 54e06ada7d624ed0d28c6a6db04a149708841bf8
Author: vnugent <public@vaughnnugent.com>
Date:   Sat Apr 13 01:24:00 2024 -0400

    fix: convert constants to hex, inline macro, ParseErrorCode

commit 4215e3100d9a0d23119080d09638fa5b60d0c6d4
Merge: d3328f4 7485aa5
Author: vnugent <public@vaughnnugent.com>
Date:   Wed Apr 3 18:26:30 2024 -0400

    Merge branch 'master' into develop

commit d3328f4152b22b28f24c43dda62464287f1efff5
Author: vnugent <public@vaughnnugent.com>
Date:   Wed Apr 3 18:22:56 2024 -0400

    build: Included dependency and versions in client builds

commit b11bc0bac955fd5c6db65f0da48456bf5e748805
Author: vnugent <public@vaughnnugent.com>
Date:   Wed Apr 3 18:10:08 2024 -0400

    fix: Fix c89 compatabilty comments and struct assignment

commit 9915bd41799a72413e6b400e150aa9f5fa797e25
Merge: 8e3d6ea 5184d7d
Author: vnugent <public@vaughnnugent.com>
Date:   Sat Mar 30 09:57:30 2024 -0400

    Merge branch 'master' into develop

commit 8e3d6ea5e3c83fe42cb904b6ccc4fe2b73f76aae
Author: vnugent <public@vaughnnugent.com>
Date:   Sat Mar 30 09:52:55 2024 -0400

    refactor!: Some api (struct) changes and updated tests

commit e88e8420520204e20802516f01d4488bb0b1d6ea
Merge: 490dfee 21f6c0a
Author: vnugent <public@vaughnnugent.com>
Date:   Sun Mar 3 15:02:34 2024 -0500

    Merge branch 'master' into develop

commit 490dfee4ef22479009627435c6ad728c3cbbab54
Author: vnugent <public@vaughnnugent.com>
Date:   Sun Mar 3 14:59:25 2024 -0500

    test: #3 tests for encryption/description and Macs

commit efa97490b7ed47f4e2f05bee52e2b33e14e439e6
Merge: 1b84e3c 120022a
Author: vnugent <public@vaughnnugent.com>
Date:   Sun Mar 3 14:55:48 2024 -0500

    merge master

commit 1b84e3c7c2e55b1ff9ffdd09b66873e11c131441
Author: vnugent <public@vaughnnugent.com>
Date:   Sat Mar 2 22:57:36 2024 -0500

    fix: #2 constent usage of sizeof() operator on struct types

commit 9de5a214c66adea0ef2d0bac63c59449de202a88
Author: vnugent <public@vaughnnugent.com>
Date:   Fri Mar 1 14:30:36 2024 -0500

    perf: avoid nc_key struct copy, cast and verify instead

commit b917b761120ed684af28d0707673ffadcf14b8fe
Author: vnugent <public@vaughnnugent.com>
Date:   Mon Feb 12 22:06:50 2024 -0500

    fix: found the constant time memcompare function

commit 9f85fff3b9f25da7410569ea94f994b88feb3910
Author: vnugent <public@vaughnnugent.com>
Date:   Fri Feb 9 22:48:35 2024 -0500

    feat: added/update MAC functions to sign or verify nip44 payload

commit aa5113741bb419b02d6ea416bba571fa3d65db46
Author: vnugent <public@vaughnnugent.com>
Date:   Wed Feb 7 01:37:53 2024 -0500

    add missing hmac-key output buffer

commit 55f47d22cc9ce4d1e22b70814d608c7ef3b1bbc9
Author: vnugent <public@vaughnnugent.com>
Date:   Sun Feb 4 21:08:13 2024 -0500

    simple bug fixes, and public api argument validation tests

commit 73c5a713fb164ae8b4ac8a891a8020e08eae0a3b
Author: vnugent <public@vaughnnugent.com>
Date:   Fri Feb 2 23:05:48 2024 -0500

    update api to return secpvalidate return code instead of internal return codes

commit 06c73004e1a39a7ea4ea3a89c22dee0f66adb236
Author: vnugent <public@vaughnnugent.com>
Date:   Fri Feb 2 19:25:17 2024 -0500

    change to lgpl license

commit 6e79fdb3b6b6739fc7797d47e55a7691306cf736
Author: vnugent <public@vaughnnugent.com>
Date:   Wed Jan 31 21:30:49 2024 -0500

    move validation macros, and optionally disable them

commit ac1e58837f1ba687939f78b5c03cadd346c10ddd
Author: vnugent <public@vaughnnugent.com>
Date:   Tue Jan 30 12:25:05 2024 -0500

    couple more tests, renable range checks, set flags for all projects

1 files changed, 24 insertions, 30 deletions

diff --git a/tests/hex.h b/tests/hex.h
index 5e90ce9..3cfe559 100644
--- a/tests/hex.h
+++ b/tests/hex.h
@@ -28,18 +28,12 @@
 
 #include <nc-util.h>
 
-typedef struct hexBytes
-{
-	uint8_t* data;
-	size_t length;
-} HexBytes;
-
-/* Deferred list of HexBytes to be freed on exit */
-static HexBytes* _hdeferList[10];
+/* Deferred list of span_t to be freed on exit */
+static span_t _hdeferList[20];
 static size_t _hdeferListIndex = 0;
 
 /* 
-	Allocates a HexBytes and decodes the hexadecimal string into it's binary
+	Allocates a span_t and decodes the hexadecimal string into it's binary
 	representation. The string must be a valid hexadecimal string and the length
 	and may not be NULL. The length may be known at compile time and can be used
     to assert the length of the string literal.
@@ -48,34 +42,34 @@ static size_t _hdeferListIndex = 0;
 */
 #define FromHexString(str, len) _fromHexString(str, sizeof(str) - 1); STATIC_ASSERT(sizeof(str)/2 == len && len > 0, "Invalid length hex string literal");
 
-static HexBytes* __allocHexBytes(size_t length)
+static span_t __allocHexBytes(size_t length)
 {
-	HexBytes* hexBytes;
+	span_t hexBytes;
 
 	length /= 2;
 
-	hexBytes = (HexBytes*)malloc(length + sizeof(HexBytes));
-	if(!hexBytes)
+	hexBytes.data = malloc(length);
+
+	if(!hexBytes.data)
 	{
-		return NULL;
+		return hexBytes;
 	}
 
-	hexBytes->length = length;
-	/* data starts after the structure size */
-	hexBytes-> data = ((uint8_t*)hexBytes) + sizeof(HexBytes);
+	hexBytes.size = length;
 	/* add new value to deferred cleanup list */
 	_hdeferList[_hdeferListIndex++] = hexBytes;
 	return hexBytes;
 }
 
-static HexBytes* _fromHexString(const char* hexLiteral, size_t strLen)
+static span_t _fromHexString(const char* hexLiteral, uint32_t strLen)
 {
-	HexBytes* hexBytes;
+	span_t hexBytes;
 	size_t i;
 
 	if(!hexLiteral)
 	{
-		return NULL;
+		ncSpanInit(&hexBytes, NULL, 0);
+		return hexBytes;
 	}
 
 	/* alloc the raw bytes */
@@ -90,14 +84,14 @@ static HexBytes* _fromHexString(const char* hexLiteral, size_t strLen)
 		byteString[0] = hexLiteral[i];
 		byteString[1] = hexLiteral[i + 1];
 
-		hexBytes->data[i / 2] = (uint8_t)strtol(byteString, NULL, 16);
+		hexBytes.data[i / 2] = (uint8_t)strtol(byteString, NULL, 16);
 	}
 	
 	return hexBytes;
 }
 
 /*
-	Frees all the HexBytes that were allocated by the 
+	Frees all the span_t that were allocated by the 
 	FromHexString function. To be called at the end of 
 	the program.
 */
@@ -105,8 +99,8 @@ static void FreeHexBytes(void)
 {
 	while(_hdeferListIndex > 0)
 	{
-		free(_hdeferList[--_hdeferListIndex]);
-		_hdeferList[_hdeferListIndex] = NULL;
+		free(_hdeferList[--_hdeferListIndex].data);
+		memset(&_hdeferList[_hdeferListIndex], 0, sizeof(span_t));
 	}
 }
 
@@ -127,18 +121,18 @@ static void PrintHexRaw(void* bytes, size_t len)
 }
 
 /*
-* Prints the value of the HexBytes as a hexadecimal string
-* @param hexBytes A pointer to the HexBytes structure to print the value of
+* Prints the value of the span_t as a hexadecimal string
+* @param hexBytes A pointer to the span_t structure to print the value of
 */
-static void PrintHexBytes(HexBytes* hexBytes)
+static void PrintHexBytes(span_t hexBytes)
 {
-	if (!hexBytes)
+	if (ncSpanIsValid(hexBytes))
 	{
-		puts("NULL");
+		PrintHexRaw(hexBytes.data, hexBytes.size);
 	}
 	else
 	{
-		PrintHexRaw(hexBytes->data, hexBytes->length);
+		puts("NULL");		
 	}
 }