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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. */
/* */
/**************************************************************************/
/**************************************************************************/
/*
Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All
rights reserved.
License to copy and use this software is granted provided that it
is identified as the ""RSA Data Security, Inc. MD5 Message-Digest
Algorithm"" in all material mentioning or referencing this software
or this function.
License is also granted to make and use derivative works provided
that such works are identified as ""derived from the RSA Data
Security, Inc. MD5 Message-Digest Algorithm"" in all material
mentioning or referencing the derived work.
RSA Data Security, Inc. makes no representations concerning either
the merchantability of this software or the suitability of this
software for any particular purpose. It is provided ""as is""
without express or implied warranty of any kind.
These notices must be retained in any copies of any part of this
documentation and/or software.
*/
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Crypto Component */
/** */
/** MD5 Digest Algorithm (MD5) */
/** */
/**************************************************************************/
/**************************************************************************/
#include "nx_crypto_md5.h"
/* Define macros for the MD5 transform function. */
/* Define the MD5 basic F, G, H and I functions. */
#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define I(x, y, z) ((y) ^ ((x) | (~z)))
/* Define the MD5 left shift circular function. */
#define LEFT_SHIFT_CIRCULAR(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
/* Define the MD5 complex FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4. */
#define FF(a, b, c, d, x, s, ac) { \
(a) += F((b), (c), (d)) + (x) + (ULONG)(ac); \
(a) = LEFT_SHIFT_CIRCULAR((a), (s)); \
(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G((b), (c), (d)) + (x) + (ULONG)(ac); \
(a) = LEFT_SHIFT_CIRCULAR((a), (s)); \
(a) += (b); \
}
#define HH(a, b, c, d, x, s, ac) { \
(a) += H((b), (c), (d)) + (x) + (ULONG)(ac); \
(a) = LEFT_SHIFT_CIRCULAR((a), (s)); \
(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I((b), (c), (d)) + (x) + (ULONG)(ac); \
(a) = LEFT_SHIFT_CIRCULAR((a), (s)); \
(a) += (b); \
}
/* Define the padding array. This is used to pad the message such that its length is
64 bits shy of being a multiple of 512 bits long. */
const UCHAR _nx_crypto_md5_padding[64] = {0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_md5_initialize PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function initializes the MD5 context. It must be called prior */
/* to creating the MD5 digest. */
/* */
/* INPUT */
/* */
/* context MD5 context pointer */
/* algorithm Algorithm type */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* _nx_crypto_method_md5_operation Handle MD5 operation */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* updated constants, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_md5_initialize(NX_CRYPTO_MD5 *context, UINT algorithm)
{
NX_CRYPTO_PARAMETER_NOT_USED(algorithm);
/* Determine if the context is non-null. */
if (context == NX_CRYPTO_NULL)
{
return(NX_CRYPTO_PTR_ERROR);
}
/* First, clear the bit count for this context. */
context -> nx_md5_bit_count[0] = 0; /* Clear the lower 32-bits of the count */
context -> nx_md5_bit_count[1] = 0; /* Clear the upper 32-bits of the count */
/* Finally, setup the context states. */
context -> nx_md5_states[0] = 0x67452301UL; /* Setup state A */
context -> nx_md5_states[1] = 0xEFCDAB89UL; /* Setup state B */
context -> nx_md5_states[2] = 0x98BADCFEUL; /* Setup state C */
context -> nx_md5_states[3] = 0x10325476UL; /* Setup state D */
/* Return success. */
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_md5_update PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function updates the digest calculation with new input from */
/* the caller. */
/* */
/* INPUT */
/* */
/* context MD5 context pointer */
/* input_ptr Pointer to byte(s) of input */
/* input_length Length of bytes of input */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_crypto_md5_process_buffer Process complete buffer, */
/* which is 64-bytes in size */
/* */
/* CALLED BY */
/* */
/* _nx_crypto_md5_digest_calculate Perform calculation of the */
/* MD5 digest */
/* _nx_crypto_method_md5_operation Handle MD5 operation */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* verified memcpy use cases, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_md5_update(NX_CRYPTO_MD5 *context, UCHAR *input_ptr, UINT input_length)
{
ULONG current_bytes;
ULONG needed_fill_bytes;
/* Determine if the context is non-null. */
if (context == NX_CRYPTO_NULL)
{
return(NX_CRYPTO_PTR_ERROR);
}
/* Determine if there is a length. */
if (input_length == 0)
{
return(NX_CRYPTO_SUCCESS);
}
/* Calculate the current byte count mod 64. Note the reason for the
shift by 3 is to account for the 8 bits per byte. */
current_bytes = (context -> nx_md5_bit_count[0] >> 3) & 0x3F;
/* Calculate the current number of bytes needed to be filled. */
needed_fill_bytes = 64 - current_bytes;
/* Update the total bit count based on the input length. */
context -> nx_md5_bit_count[0] += (input_length << 3);
/* Determine if there is roll-over of the bit count into the MSW. */
if (context -> nx_md5_bit_count[0] < (input_length << 3))
{
/* Yes, increment the MSW of the bit count. */
context -> nx_md5_bit_count[1]++;
}
/* Update upper total bit count word. */
context -> nx_md5_bit_count[1] += (input_length >> 29);
/* Check for a partial buffer that needs to be transformed. */
if ((current_bytes) && (input_length >= needed_fill_bytes))
{
/* Yes, we can complete the buffer and transform it. */
/* Copy the appropriate portion of the input buffer into the internal
buffer of the context. */
NX_CRYPTO_MEMCPY((void *)&(context -> nx_md5_buffer[current_bytes]), (void *)input_ptr, needed_fill_bytes); /* Use case of memcpy is verified. */
/* Process the 64-byte (512 bit) buffer. */
_nx_crypto_md5_process_buffer(context, context -> nx_md5_buffer);
/* Adjust the pointers and length accordingly. */
input_length = input_length - needed_fill_bytes;
input_ptr = input_ptr + needed_fill_bytes;
/* Clear the remaining bits, since the buffer was processed. */
current_bytes = 0;
}
/* Process any and all whole blocks of input. */
while (input_length >= 64)
{
/* Process this 64-byte (512 bit) buffer. */
_nx_crypto_md5_process_buffer(context, input_ptr);
/* Adjust the pointers and length accordingly. */
input_length = input_length - 64;
input_ptr = input_ptr + 64;
}
/* Determine if there is anything left. */
if (input_length)
{
/* Save the remaining bytes in the internal buffer after any remaining bytes
that it is processed later. */
NX_CRYPTO_MEMCPY((void *)&(context -> nx_md5_buffer[current_bytes]), (void *)input_ptr, input_length); /* Use case of memcpy is verified. */
}
/* Return success. */
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_md5_digest_calculate PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function finishes calculation of the MD5 digest. It is called */
/* where there is no further input needed for the digest. The resulting*/
/* 16-byte (128-bit) MD5 digest is returned to the caller. */
/* */
/* INPUT */
/* */
/* context MD5 context pointer */
/* digest 16-byte (128-bit) digest */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* algorithm Algorithm type */
/* */
/* CALLS */
/* */
/* _nx_crypto_md5_update Update the digest with padding*/
/* and length of digest */
/* */
/* CALLED BY */
/* */
/* _nx_crypto_method_md5_operation Handle MD5 operation */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Timothy Stapko Initial Version 6.0 */
/* 09-30-2020 Timothy Stapko Modified comment(s), */
/* updated constants, */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
NX_CRYPTO_KEEP UINT _nx_crypto_md5_digest_calculate(NX_CRYPTO_MD5 *context, UCHAR digest[16], UINT algorithm)
{
UCHAR bit_count_string[8];
ULONG current_byte_count;
ULONG padding_bytes;
NX_CRYPTO_PARAMETER_NOT_USED(algorithm);
/* Move the lower portion of the bit count into the array. */
bit_count_string[0] = (UCHAR)context -> nx_md5_bit_count[0];
bit_count_string[1] = (UCHAR)(context -> nx_md5_bit_count[0] >> 8);
bit_count_string[2] = (UCHAR)(context -> nx_md5_bit_count[0] >> 16);
bit_count_string[3] = (UCHAR)(context -> nx_md5_bit_count[0] >> 24);
bit_count_string[4] = (UCHAR)context -> nx_md5_bit_count[1];
bit_count_string[5] = (UCHAR)(context -> nx_md5_bit_count[1] >> 8);
bit_count_string[6] = (UCHAR)(context -> nx_md5_bit_count[1] >> 16);
bit_count_string[7] = (UCHAR)(context -> nx_md5_bit_count[1] >> 24);
/* Calculate the current byte count. */
current_byte_count = (context -> nx_md5_bit_count[0] >> 3) & 0x3F;
/* Calculate the padding bytes needed. */
padding_bytes = (current_byte_count < 56) ? (56 - current_byte_count) : (120 - current_byte_count);
/* Add any padding required. */
_nx_crypto_md5_update(context, (UCHAR*)_nx_crypto_md5_padding, padding_bytes);
/* Add the in the length. */
_nx_crypto_md5_update(context, bit_count_string, 8);
/* Now store the digest in the caller specified destination. */
digest[0] = (UCHAR)context -> nx_md5_states[0];
digest[1] = (UCHAR)(context -> nx_md5_states[0] >> 8);
digest[2] = (UCHAR)(context -> nx_md5_states[0] >> 16);
digest[3] = (UCHAR)(context -> nx_md5_states[0] >> 24);
digest[4] = (UCHAR)context -> nx_md5_states[1];
digest[5] = (UCHAR)(context -> nx_md5_states[1] >> 8);
digest[6] = (UCHAR)(context -> nx_md5_states[1] >> 16);
digest[7] = (UCHAR)(context -> nx_md5_states[1] >> 24);
digest[8] = (UCHAR)context -> nx_md5_states[2];
digest[9] = (UCHAR)(context -> nx_md5_states[2] >> 8);
digest[10] = (UCHAR)(context -> nx_md5_states[2] >> 16);
digest[11] = (UCHAR)(context -> nx_md5_states[2] >> 24);
digest[12] = (UCHAR)context -> nx_md5_states[3];
digest[13] = (UCHAR)(context -> nx_md5_states[3] >> 8);
digest[14] = (UCHAR)(context -> nx_md5_states[3] >> 16);
digest[15] = (UCHAR)(context -> nx_md5_states[3] >> 24);
#ifdef NX_SECURE_KEY_CLEAR
NX_CRYPTO_MEMSET(bit_count_string, 0, sizeof(bit_count_string));
#endif /* NX_SECURE_KEY_CLEAR */
/* Return successful completion. */
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_md5_process_buffer PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function actually uses the MD5 algorithm to process a 64-byte */
/* (512 bit) buffer. */
/* */
/* INPUT */
/* */
/* context MD5 context pointer */
/* buffer 64-byte buffer */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* _nx_crypto_md5_update Update the digest with padding*/
/* and length of digest */
/* */
/* 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 VOID _nx_crypto_md5_process_buffer(NX_CRYPTO_MD5 *context, UCHAR buffer[64])
{
UINT i, j;
ULONG a, b, c, d;
ULONG x[16];
/* Initialize the state variables. */
a = context -> nx_md5_states[0];
b = context -> nx_md5_states[1];
c = context -> nx_md5_states[2];
d = context -> nx_md5_states[3];
/* Now, setup the x array of ULONGs for fast processing. */
j = 0;
for (i = 0; i < 16; i++)
{
/* Convert 4 bytes into one 32-bit word. */
x[i] = ((ULONG)buffer[j]) | (((ULONG)buffer[j + 1]) << 8) | (((ULONG)buffer[j + 2]) << 16) | (((ULONG)buffer[j + 3]) << 24);
/* Move to next position in source array. */
j = j + 4;
}
/* Process Round 1 of MD5 calculation. */
FF(a, b, c, d, x[0], 7, 0xd76aa478UL);
FF(d, a, b, c, x[1], 12, 0xe8c7b756UL);
FF(c, d, a, b, x[2], 17, 0x242070dbUL);
FF(b, c, d, a, x[3], 22, 0xc1bdceeeUL);
FF(a, b, c, d, x[4], 7, 0xf57c0fafUL);
FF(d, a, b, c, x[5], 12, 0x4787c62aUL);
FF(c, d, a, b, x[6], 17, 0xa8304613UL);
FF(b, c, d, a, x[7], 22, 0xfd469501UL);
FF(a, b, c, d, x[8], 7, 0x698098d8UL);
FF(d, a, b, c, x[9], 12, 0x8b44f7afUL);
FF(c, d, a, b, x[10], 17, 0xffff5bb1UL);
FF(b, c, d, a, x[11], 22, 0x895cd7beUL);
FF(a, b, c, d, x[12], 7, 0x6b901122UL);
FF(d, a, b, c, x[13], 12, 0xfd987193UL);
FF(c, d, a, b, x[14], 17, 0xa679438eUL);
FF(b, c, d, a, x[15], 22, 0x49b40821UL);
/* Process Round 2 of MD5 calculation. */
GG(a, b, c, d, x[1], 5, 0xf61e2562UL);
GG(d, a, b, c, x[6], 9, 0xc040b340UL);
GG(c, d, a, b, x[11], 14, 0x265e5a51UL);
GG(b, c, d, a, x[0], 20, 0xe9b6c7aaUL);
GG(a, b, c, d, x[5], 5, 0xd62f105dUL);
GG(d, a, b, c, x[10], 9, 0x02441453UL);
GG(c, d, a, b, x[15], 14, 0xd8a1e681UL);
GG(b, c, d, a, x[4], 20, 0xe7d3fbc8UL);
GG(a, b, c, d, x[9], 5, 0x21e1cde6UL);
GG(d, a, b, c, x[14], 9, 0xc33707d6UL);
GG(c, d, a, b, x[3], 14, 0xf4d50d87UL);
GG(b, c, d, a, x[8], 20, 0x455a14edUL);
GG(a, b, c, d, x[13], 5, 0xa9e3e905UL);
GG(d, a, b, c, x[2], 9, 0xfcefa3f8UL);
GG(c, d, a, b, x[7], 14, 0x676f02d9UL);
GG(b, c, d, a, x[12], 20, 0x8d2a4c8aUL);
/* Process Round 3 of MD5 calculation. */
HH(a, b, c, d, x[5], 4, 0xfffa3942UL);
HH(d, a, b, c, x[8], 11, 0x8771f681UL);
HH(c, d, a, b, x[11], 16, 0x6d9d6122UL);
HH(b, c, d, a, x[14], 23, 0xfde5380cUL);
HH(a, b, c, d, x[1], 4, 0xa4beea44UL);
HH(d, a, b, c, x[4], 11, 0x4bdecfa9UL);
HH(c, d, a, b, x[7], 16, 0xf6bb4b60UL);
HH(b, c, d, a, x[10], 23, 0xbebfbc70UL);
HH(a, b, c, d, x[13], 4, 0x289b7ec6UL);
HH(d, a, b, c, x[0], 11, 0xeaa127faUL);
HH(c, d, a, b, x[3], 16, 0xd4ef3085UL);
HH(b, c, d, a, x[6], 23, 0x04881d05UL);
HH(a, b, c, d, x[9], 4, 0xd9d4d039UL);
HH(d, a, b, c, x[12], 11, 0xe6db99e5UL);
HH(c, d, a, b, x[15], 16, 0x1fa27cf8UL);
HH(b, c, d, a, x[2], 23, 0xc4ac5665UL);
/* Process Round 4 of MD5 calculation. */
II(a, b, c, d, x[0], 6, 0xf4292244UL);
II(d, a, b, c, x[7], 10, 0x432aff97UL);
II(c, d, a, b, x[14], 15, 0xab9423a7UL);
II(b, c, d, a, x[5], 21, 0xfc93a039UL);
II(a, b, c, d, x[12], 6, 0x655b59c3UL);
II(d, a, b, c, x[3], 10, 0x8f0ccc92UL);
II(c, d, a, b, x[10], 15, 0xffeff47dUL);
II(b, c, d, a, x[1], 21, 0x85845dd1UL);
II(a, b, c, d, x[8], 6, 0x6fa87e4fUL);
II(d, a, b, c, x[15], 10, 0xfe2ce6e0UL);
II(c, d, a, b, x[6], 15, 0xa3014314UL);
II(b, c, d, a, x[13], 21, 0x4e0811a1UL);
II(a, b, c, d, x[4], 6, 0xf7537e82UL);
II(d, a, b, c, x[11], 10, 0xbd3af235UL);
II(c, d, a, b, x[2], 15, 0x2ad7d2bbUL);
II(b, c, d, a, x[9], 21, 0xeb86d391UL);
/* Save the resulting in this MD5 context. */
context -> nx_md5_states[0] += a;
context -> nx_md5_states[1] += b;
context -> nx_md5_states[2] += c;
context -> nx_md5_states[3] += d;
#ifdef NX_SECURE_KEY_CLEAR
a = 0; b = 0; c = 0; d = 0;
NX_CRYPTO_MEMSET(x, 0, sizeof(x));
#endif /* NX_SECURE_KEY_CLEAR */
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_method_md5_init PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the common crypto method init callback for */
/* Microsoft supported MD5 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 */
/* */
/* None */
/* */
/* 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_md5_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_PARAMETER_NOT_USED(key);
NX_CRYPTO_PARAMETER_NOT_USED(key_size_in_bits);
NX_CRYPTO_PARAMETER_NOT_USED(handle);
NX_CRYPTO_STATE_CHECK
if (method == NX_CRYPTO_NULL)
{
return(NX_CRYPTO_PTR_ERROR);
}
if (crypto_metadata == NX_CRYPTO_NULL)
{
/* metadata is not passed by IPsec. */
#ifndef NX_IPSEC_ENABLE
return(NX_CRYPTO_PTR_ERROR);
#endif
}
else if (((((ULONG)crypto_metadata) & 0x3) != 0) || (crypto_metadata_size < sizeof(NX_CRYPTO_MD5)))
{
return(NX_CRYPTO_PTR_ERROR);
}
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_method_md5_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_md5_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_MD5));
#else
NX_CRYPTO_PARAMETER_NOT_USED(crypto_metadata);
#endif/* NX_SECURE_KEY_CLEAR */
return(NX_CRYPTO_SUCCESS);
}
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_crypto_method_md5_operation PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function encrypts and decrypts a message using */
/* the MD5 algorithm. */
/* */
/* INPUT */
/* */
/* op MD5 operation */
/* handle Crypto handle */
/* method Cryption Method Object */
/* key Encryption Key */
/* key_size_in_bits Key size in bits */
/* input Input data */
/* input_length_in_byte Input data size */
/* iv_ptr Initial vector */
/* output Output buffer */
/* output_length_in_byte Output buffer size */
/* crypto_metadata Metadata area */
/* crypto_metadata_size Metadata area size */
/* packet_ptr Pointer to packet */
/* nx_crypto_hw_process_callback Callback function pointer */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* _nx_crypto_md5_initialize Initialize the MD5 context */
/* _nx_crypto_md5_update Update the digest with padding*/
/* and length of digest */
/* _nx_crypto_md5_digest_calculate Perform calculation of the */
/* MD5 digest */
/* */
/* 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_md5_operation(UINT op, /* Encrypt, Decrypt, Authenticate */
VOID *handle, /* 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))
{
NX_CRYPTO_MD5 *ctx = (NX_CRYPTO_MD5 *)crypto_metadata;
#ifdef NX_IPSEC_ENABLE
NX_CRYPTO_MD5 metadata;
#endif
NX_CRYPTO_PARAMETER_NOT_USED(handle);
NX_CRYPTO_PARAMETER_NOT_USED(key);
NX_CRYPTO_PARAMETER_NOT_USED(key_size_in_bits);
NX_CRYPTO_PARAMETER_NOT_USED(iv_ptr);
NX_CRYPTO_PARAMETER_NOT_USED(packet_ptr);
NX_CRYPTO_PARAMETER_NOT_USED(nx_crypto_hw_process_callback);
NX_CRYPTO_STATE_CHECK
if (method == NX_CRYPTO_NULL)
{
return(NX_CRYPTO_PTR_ERROR);
}
/* Verify the metadata addrsss is 4-byte aligned. */
if (crypto_metadata == NX_CRYPTO_NULL)
{
#ifdef NX_IPSEC_ENABLE
/* metadata is not passed by IPsec. */
ctx = &metadata;
#else
return(NX_CRYPTO_PTR_ERROR);
#endif
}
else if (((((ULONG)crypto_metadata) & 0x3) != 0) || (crypto_metadata_size < sizeof(NX_CRYPTO_MD5)))
{
return(NX_CRYPTO_PTR_ERROR);
}
switch (op)
{
case NX_CRYPTO_HASH_INITIALIZE:
_nx_crypto_md5_initialize(ctx, method -> nx_crypto_algorithm);
break;
case NX_CRYPTO_HASH_UPDATE:
_nx_crypto_md5_update(ctx, input, input_length_in_byte);
break;
case NX_CRYPTO_HASH_CALCULATE:
if(output_length_in_byte < 16)
return(NX_CRYPTO_INVALID_BUFFER_SIZE);
_nx_crypto_md5_digest_calculate(ctx, output, method -> nx_crypto_algorithm);
break;
default:
if(output_length_in_byte < 16)
return(NX_CRYPTO_INVALID_BUFFER_SIZE);
_nx_crypto_md5_initialize(ctx, method -> nx_crypto_algorithm);
_nx_crypto_md5_update(ctx, input, input_length_in_byte);
_nx_crypto_md5_digest_calculate(ctx, output, method -> nx_crypto_algorithm);
#if defined(NX_SECURE_KEY_CLEAR) && defined(NX_IPSEC_ENABLE)
if (crypto_metadata == NX_CRYPTO_NULL)
{
memset(ctx, 0, sizeof(NX_CRYPTO_MD5));
}
#endif
break;
}
return NX_CRYPTO_SUCCESS;
}