Tcl Nano
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Comment:Add AES256-CTR Tcl command
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SHA3-256: ed43f190761dc9c0c272c80ff59f6270960e87619bba9c90c6094cbe31192845
User & Date: rkeene on 2019-01-11 15:53:11
Other Links: branch diff | manifest | tags
Context
2019-01-11
16:08
Removed all heap-based memory allocations since they can be done on the stack now that they are constant sized check-in: 567d112dc6 user: rkeene tags: monocypher
15:53
Add AES256-CTR Tcl command check-in: ed43f19076 user: rkeene tags: monocypher
2019-01-10
21:14
Compile AES as AES256 CTR check-in: 4131055ef7 user: rkeene tags: monocypher
Changes
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Modified nano.c from [aa5532a5f2] to [8a374b97c9].

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#ifdef NANO_TCL_HAVE_OPENMP
#  include <omp.h>
#endif

#include "randombytes.h"
#include "monocypher.h"
#include "argon2.h"
#include "aes.h"

#define NANO_SECRET_KEY_LENGTH 32
#define NANO_PUBLIC_KEY_LENGTH 32
#define NANO_BLOCK_HASH_LENGTH 32
#define NANO_BLOCK_SIGNATURE_LENGTH 64
#define NANO_WORK_VALUE_LENGTH 8
#define NANO_WORK_HASH_LENGTH  8
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	Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(result, sizeof(result)));

	return(TCL_OK);

	/* NOTREACH */
	clientData = clientData;
}

static int nano_tcl_aes256_ctr(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
	struct AES_ctx aes_handle;
	void *key, *iv, *data;
	int key_length, iv_length, data_length;
	unsigned char result[128];

	if (objc != 4) {
		Tcl_WrongNumArgs(interp, 1, objv, "key iv data");

		return(TCL_ERROR);
	}

	key  = Tcl_GetByteArrayFromObj(objv[1], &key_length);
	iv   = Tcl_GetByteArrayFromObj(objv[2], &iv_length);
	data = Tcl_GetByteArrayFromObj(objv[3], &data_length);

	if (key_length != AES_KEYLEN) {
		Tcl_SetResult(interp, "Key is not the right size", NULL);

		return(TCL_ERROR);
	}

	if (iv_length != AES_BLOCKLEN) {
		Tcl_SetResult(interp, "IV is not the right size", NULL);

		return(TCL_ERROR);
	}

	if (data_length > sizeof(result)) {
		Tcl_SetResult(interp, "Data exceeds maximum size", NULL);

		return(TCL_ERROR);
	}

	memcpy(result, data, data_length);

	AES_init_ctx_iv(&aes_handle, key, iv);
	AES_CTR_xcrypt_buffer(&aes_handle, result, data_length);

	Tcl_SetObjResult(interp, Tcl_NewByteArrayObj(result, AES_KEYLEN));

	return(TCL_OK);

	/* NOTREACH */
	clientData = clientData;
}

static int nano_tcl_hash_data(ClientData clientData, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]) {
	unsigned char *data, result[NANO_BLOCK_SIGNATURE_LENGTH];
	int tgifo_ret;
	int data_length, result_length;

	if (objc < 2 || objc > 3) {
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	TclNano_CreateObjCommand(interp, "::nano::internal::generateKey", nano_tcl_generate_keypair);
	TclNano_CreateObjCommand(interp, "::nano::internal::generateSeed", nano_tcl_generate_seed);
	TclNano_CreateObjCommand(interp, "::nano::internal::publicKey", nano_tcl_secret_key_to_public_key);
	TclNano_CreateObjCommand(interp, "::nano::internal::signDetached", nano_tcl_sign_detached);
	TclNano_CreateObjCommand(interp, "::nano::internal::verifyDetached", nano_tcl_verify_detached);
	TclNano_CreateObjCommand(interp, "::nano::internal::hashData", nano_tcl_hash_data);
	TclNano_CreateObjCommand(interp, "::nano::internal::deriveKeyFromPassword", nano_tcl_derive_key_from_password);
	TclNano_CreateObjCommand(interp, "::nano::internal::AES256-CTR", nano_tcl_aes256_ctr);
	TclNano_CreateObjCommand(interp, "::nano::internal::validateWork", nano_tcl_validate_work);
	TclNano_CreateObjCommand(interp, "::nano::internal::generateWork", nano_tcl_generate_work);
	TclNano_CreateObjCommand(interp, "::nano::internal::randomBytes", nano_tcl_random_bytes);

	TclNano_Eval(interp, nanoInitScript);

	TclNano_PkgProvide(interp, "nano", PACKAGE_VERSION);

	return(TCL_OK);
}

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