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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Crypto Component */
/** */
/** 3DES Encryption Standard (Triple DES) */
/** */
/**************************************************************************/
/**************************************************************************/
#include "nx_crypto_3des.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_3des_key_set PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function sets up the encryption keys for the 3DES algorithm. */
/* It must be called before either _nx_crypto_3des_encrypt or */
/* _nx_crypto_3des_decrypt can be called. */
/* */
/* INPUT */
/* */
/* context 3DES context pointer */
/* key 24 bytes key */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_crypto_des_key_set Set the key for DES */
/* */
/* CALLED BY */
/* */
/* _nx_crypto_method_3des_init Init the method for 3DES */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_3des_key_set(NX_CRYPTO_3DES *context, UCHAR key[24])
{
_nx_crypto_des_key_set(&context -> des_1, key);
_nx_crypto_des_key_set(&context -> des_2, key + 8);
_nx_crypto_des_key_set(&context -> des_3, key + 16);
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_3des_encrypt PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function uses the 3DES algorithm to encrypt 8-bytes (64-bits). */
/* The result is 8 encrypted bytes. Note that the caller must make */
/* sure the source and destination are 8-bytes in size! */
/* */
/* INPUT */
/* */
/* context 3DES context pointer */
/* source 8-byte source */
/* destination 8-byte destination */
/* length The length of output buffer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_crypto_des_encrypt Perform DES mode encryption */
/* _nx_crypto_des_decrypt Perform DES mode decryption */
/* */
/* CALLED BY */
/* */
/* _nx_crypto_method_3des_operation Handle 3DES encrypt or decrypt*/
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_3des_encrypt(NX_CRYPTO_3DES *context, UCHAR source[8],
UCHAR destination[8], UINT length)
{
/* ciphertext = EK3(DK2(EK1(plaintext)))
I.e., DES encrypt with K1, DES decrypt with K2, then DES encrypt with K3. */
_nx_crypto_des_encrypt(&context -> des_1, source, destination, length);
_nx_crypto_des_decrypt(&context -> des_2, destination, destination, length);
_nx_crypto_des_encrypt(&context -> des_3, destination, destination, length);
/* Return successful completion. */
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_3des_decrypt PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function uses the 3DES algorithm to decrypt 8-bytes (64-bits). */
/* The result is 8 original source bytes. Note that the caller must */
/* make sure the source and destination are 8-bytes in size! */
/* */
/* INPUT */
/* */
/* context 3DES context pointer */
/* source 8-byte source */
/* destination 8-byte destination */
/* length The length of output buffer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_crypto_des_encrypt Perform DES mode encryption */
/* _nx_crypto_des_decrypt Perform DES mode decryption */
/* */
/* CALLED BY */
/* */
/* _nx_crypto_method_3des_operation Handle 3DES encrypt or decrypt*/
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_3des_decrypt(NX_CRYPTO_3DES *context, UCHAR source[8],
UCHAR destination[8], UINT length)
{
/*
plaintext = DK1(EK2(DK3(ciphertext)))
I.e., decrypt with K3, encrypt with K2, then decrypt with K1.
*/
_nx_crypto_des_decrypt(&context -> des_3, source, destination, length);
_nx_crypto_des_encrypt(&context -> des_2, destination, destination, length);
_nx_crypto_des_decrypt(&context -> des_1, destination, destination, length);
/* Return successful completion. */
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_method_3des_init PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the common crypto method init callback for */
/* Microsoft supported 3DES cryptographic algorithm. */
/* */
/* INPUT */
/* */
/* method Pointer to crypto method */
/* key Pointer to key */
/* key_size_in_bits Length of key size in bits */
/* handler Returned crypto handler */
/* crypto_metadata Metadata area */
/* crypto_metadata_size Size of the metadata area */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_crypto_3des_key_set Set the key for 3DES */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_method_3des_init(struct NX_CRYPTO_METHOD_STRUCT *method,
UCHAR *key, NX_CRYPTO_KEY_SIZE key_size_in_bits,
VOID **handle,
VOID *crypto_metadata,
ULONG crypto_metadata_size)
{
NX_CRYPTO_3DES *triple_des_context_ptr;
NX_CRYPTO_PARAMETER_NOT_USED(handle);
NX_CRYPTO_STATE_CHECK
/* Validate input parameters. */
if ((method == NX_CRYPTO_NULL) || (key == NX_CRYPTO_NULL) || (crypto_metadata == NX_CRYPTO_NULL))
{
return(NX_CRYPTO_PTR_ERROR);
}
/* Verify the metadata addrsss is 4-byte aligned. */
if((((ULONG)crypto_metadata) & 0x3) != 0)
{
return(NX_CRYPTO_PTR_ERROR);
}
if(crypto_metadata_size < sizeof(NX_CRYPTO_3DES))
{
return(NX_CRYPTO_PTR_ERROR);
}
if (key_size_in_bits != NX_CRYPTO_3DES_KEY_LEN_IN_BITS)
{
return(NX_CRYPTO_UNSUPPORTED_KEY_SIZE);
}
triple_des_context_ptr = (NX_CRYPTO_3DES *)(crypto_metadata);
_nx_crypto_3des_key_set(triple_des_context_ptr, key);
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_method_3des_cleanup PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function cleans up the crypto metadata. */
/* */
/* INPUT */
/* */
/* crypto_metadata Crypto metadata */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* NX_CRYPTO_MEMSET Set the memory */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_method_3des_cleanup(VOID *crypto_metadata)
{
NX_CRYPTO_STATE_CHECK
#ifdef NX_SECURE_KEY_CLEAR
if (!crypto_metadata)
return (NX_CRYPTO_SUCCESS);
/* Clean up the crypto metadata. */
NX_CRYPTO_MEMSET(crypto_metadata, 0, sizeof(NX_CRYPTO_3DES));
#else
NX_CRYPTO_PARAMETER_NOT_USED(crypto_metadata);
#endif/* NX_SECURE_KEY_CLEAR */
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_method_3des_operation PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function handles 3des encrypt or decrypt operations. */
/* */
/* INPUT */
/* */
/* op Operation Type */
/* Encrypt, Decrypt, Authenticate*/
/* handler Pointer to crypto context */
/* method Pointer to crypto method */
/* key Pointer to key */
/* key_size_in_bits Length of key size in bits */
/* input Input Stream */
/* input_length_in_byte Input Stream Length */
/* iv_ptr Initialized Vector */
/* output Output Stream */
/* output_length_in_byte Output Stream Length */
/* crypto_metadata Metadata area */
/* crypto_metadata_size Size of the metadata area */
/* packet_ptr Pointer to packet */
/* nx_crypto_hw_process_callback Callback function pointer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_crypto_cbc_encrypt Perform CBC mode encryption */
/* _nx_crypto_cbc_decrypt Perform CBC mode decryption */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_method_3des_operation(UINT op, /* Encrypt, Decrypt, Authenticate */
VOID *handler, /* Crypto handler */
struct NX_CRYPTO_METHOD_STRUCT *method,
UCHAR *key,
NX_CRYPTO_KEY_SIZE key_size_in_bits,
UCHAR *input,
ULONG input_length_in_byte,
UCHAR *iv_ptr,
UCHAR *output,
ULONG output_length_in_byte,
VOID *crypto_metadata,
ULONG crypto_metadata_size,
VOID *packet_ptr,
VOID (*nx_crypto_hw_process_callback)(VOID *packet_ptr, UINT status))
{
UINT status = NX_CRYPTO_NOT_SUCCESSFUL;
NX_CRYPTO_3DES *context;
NX_CRYPTO_PARAMETER_NOT_USED(handler);
NX_CRYPTO_PARAMETER_NOT_USED(key);
NX_CRYPTO_PARAMETER_NOT_USED(key_size_in_bits);
NX_CRYPTO_PARAMETER_NOT_USED(output_length_in_byte);
NX_CRYPTO_PARAMETER_NOT_USED(packet_ptr);
NX_CRYPTO_PARAMETER_NOT_USED(nx_crypto_hw_process_callback);
NX_CRYPTO_STATE_CHECK
if (op == NX_CRYPTO_AUTHENTICATE)
{
/* Incorrect Operation. */
return(NX_CRYPTO_NOT_SUCCESSFUL);
}
if ((method == NX_CRYPTO_NULL) || (crypto_metadata == NX_CRYPTO_NULL))
{
return(NX_CRYPTO_PTR_ERROR);
}
/* Verify the metadata addrsss is 4-byte aligned. */
if((((ULONG)crypto_metadata) & 0x3) != 0)
{
return(NX_CRYPTO_PTR_ERROR);
}
if(crypto_metadata_size < sizeof(NX_CRYPTO_3DES))
{
return(NX_CRYPTO_PTR_ERROR);
}
if (method -> nx_crypto_algorithm != NX_CRYPTO_ENCRYPTION_3DES_CBC)
{
/* Incorrect method. */
return(NX_CRYPTO_INVALID_ALGORITHM);
}
context = (NX_CRYPTO_3DES *)crypto_metadata;
switch (op)
{
case NX_CRYPTO_DECRYPT:
{
status = _nx_crypto_cbc_decrypt_init(&(context -> nx_crypto_cbc_context),
iv_ptr, method -> nx_crypto_IV_size_in_bits >> 3);
if (status)
{
break;
}
status = _nx_crypto_cbc_decrypt(context, &(context -> nx_crypto_cbc_context),
(UINT (*)(VOID *, UCHAR *, UCHAR *, UINT))_nx_crypto_3des_decrypt,
input, output, input_length_in_byte,
(NX_CRYPTO_3DES_BLOCK_SIZE_IN_BITS >> 3));
} break;
case NX_CRYPTO_ENCRYPT:
{
status = _nx_crypto_cbc_encrypt_init(&(context -> nx_crypto_cbc_context),
iv_ptr, method -> nx_crypto_IV_size_in_bits >> 3);
if (status)
{
break;
}
status = _nx_crypto_cbc_encrypt(context, &(context -> nx_crypto_cbc_context),
(UINT (*)(VOID *, UCHAR *, UCHAR *, UINT))_nx_crypto_3des_encrypt,
input, output, input_length_in_byte,
(NX_CRYPTO_3DES_BLOCK_SIZE_IN_BITS >> 3));
} break;
case NX_CRYPTO_DECRYPT_INITIALIZE:
{
status = _nx_crypto_cbc_decrypt_init(&(context -> nx_crypto_cbc_context),
iv_ptr, method -> nx_crypto_IV_size_in_bits >> 3);
} break;
case NX_CRYPTO_ENCRYPT_INITIALIZE:
{
status = _nx_crypto_cbc_encrypt_init(&(context -> nx_crypto_cbc_context),
iv_ptr, method -> nx_crypto_IV_size_in_bits >> 3);
} break;
case NX_CRYPTO_DECRYPT_UPDATE:
{
status = _nx_crypto_cbc_decrypt(context, &(context -> nx_crypto_cbc_context),
(UINT (*)(VOID *, UCHAR *, UCHAR *, UINT))_nx_crypto_3des_decrypt,
input, output, input_length_in_byte,
(NX_CRYPTO_3DES_BLOCK_SIZE_IN_BITS >> 3));
} break;
case NX_CRYPTO_ENCRYPT_UPDATE:
{
status = _nx_crypto_cbc_encrypt(context, &(context -> nx_crypto_cbc_context),
(UINT (*)(VOID *, UCHAR *, UCHAR *, UINT))_nx_crypto_3des_encrypt,
input, output, input_length_in_byte,
(NX_CRYPTO_3DES_BLOCK_SIZE_IN_BITS >> 3));
} break;
case NX_CRYPTO_ENCRYPT_CALCULATE:
/* fallthrough */
case NX_CRYPTO_DECRYPT_CALCULATE:
{
/* Nothing to do. */
status = NX_CRYPTO_SUCCESS;
} break;
default:
{
status = NX_CRYPTO_INVALID_ALGORITHM;
} break;
}
return status;
}