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/***************************************************************************/
/* Copyright (c) 2024 Microsoft Corporation */
/* Copyright (c) 2026 Eclipse ThreadX contributors */
/* */
/* This program and the accompanying materials are made available under */
/* the terms of the MIT License which is available at */
/* https://opensource.org/licenses/MIT. */
/* */
/* SPDX-License-Identifier: MIT */
/***************************************************************************/
#define HTTP_MAX_BINARY_MD5 16
#define HTTP_MAX_ASCII_MD5 32
#define HTTP_SERVER_NONCE_SIZE 32
#define HTTP_MAX_RESOURCE 64
VOID http_hex_ascii_convert(CHAR *source, UINT source_length, CHAR *destination)
{
UINT i,j;
CHAR digit;
/* Setup destination index. */
j = 0;
/* Loop to process the entire source string. */
for (i = 0; i < source_length; i++)
{
/* Pickup the first nibble. */
digit = (source[i] >> 4) & 0xF;
/* Convert to ASCII and store. */
if (digit <= 9)
destination[j++] = (CHAR)(digit + '0');
else
destination[j++] = (CHAR)(digit + 'a' - 10);
/* Pickup the second nibble. */
digit = source[i] & 0xF;
/* Convert to ASCII and store. */
if (digit <= 9)
destination[j++] = (CHAR)(digit + '0');
else
destination[j++] = (CHAR)(digit + 'a' - 10);
}
/* Finally, place a NULL in the destination string. */
destination[j] = (CHAR) NX_NULL;
}
UINT http_nonce_retrieve(NX_PACKET *packet_ptr, CHAR *nonce)
{
UINT length;
UINT found;
CHAR *buffer_ptr;
found = NX_FALSE;
length = 0;
nonce[0] = NX_NULL;
buffer_ptr = (CHAR *) packet_ptr -> nx_packet_prepend_ptr;
while (((buffer_ptr + 6) < (CHAR *) packet_ptr -> nx_packet_append_ptr) && (*buffer_ptr != (CHAR) 0))
{
/* Check for the uri token. */
if (((*(buffer_ptr) == 'n') || (*(buffer_ptr) == 'N')) &&
((*(buffer_ptr+1) == 'o') || (*(buffer_ptr+1) == 'O')) &&
((*(buffer_ptr+2) == 'n') || (*(buffer_ptr+2) == 'N')) &&
((*(buffer_ptr+3) == 'c') || (*(buffer_ptr+3) == 'C')) &&
((*(buffer_ptr+4) == 'e') || (*(buffer_ptr+4) == 'E')) &&
(*(buffer_ptr+5) == '='))
{
/* Move the pointer up to the actual authorization string. */
buffer_ptr = buffer_ptr + 6;
found = NX_TRUE;
break;
}
/* Move the pointer up to the next character. */
buffer_ptr++;
}
if (found == NX_FALSE)
{
return(NX_NOT_FOUND);
}
/* Now remove any extra blanks and quotes. */
while ((buffer_ptr < (CHAR *) packet_ptr -> nx_packet_append_ptr) && ((*buffer_ptr == ' ') || (*buffer_ptr == (CHAR) 0x22)))
{
/* Move the pointer up one character. */
buffer_ptr++;
}
/* Now pickup the nonce string. */
length = 0;
while ((buffer_ptr < (CHAR *) packet_ptr -> nx_packet_append_ptr) && (*buffer_ptr != (CHAR) 0) && (*buffer_ptr != ' ') && (*buffer_ptr != (CHAR) 13) && (length < HTTP_SERVER_NONCE_SIZE))
{
/* Determine if the ending quote is present. */
if (*buffer_ptr == (CHAR) 0x22)
{
break;
}
/* Copy a character of the authorization string into the destination. */
nonce[length++] = *buffer_ptr++;
}
nonce[length] = NX_NULL;
return(NX_SUCCESS);
}
VOID http_digest_response_calculate(NX_MD5 *md5data, CHAR *username, CHAR *realm, CHAR *password, CHAR *nonce, CHAR *method, CHAR *uri, CHAR *nc, CHAR *cnonce, CHAR *result)
{
CHAR md5_binary[HTTP_MAX_BINARY_MD5];
CHAR ha1_string[HTTP_MAX_ASCII_MD5 + 1];
CHAR ha2_string[HTTP_MAX_ASCII_MD5 + 1];
UINT username_length;
UINT password_length;
UINT realm_length;
UINT method_length;
UINT uri_length;
UINT nc_length;
UINT cnonce_length;
/* Get string length. */
username_length = strlen(username);
password_length = strlen(password);
realm_length = strlen(realm);
method_length = strlen(method);
uri_length = strlen(uri);
nc_length = strlen(nc);
cnonce_length = strlen(cnonce);
/* Calculate the H(A1) portion of the digest. */
_nx_md5_initialize(md5data);
_nx_md5_update(md5data, (unsigned char *) username, username_length);
_nx_md5_update(md5data, (unsigned char *) ":", 1);
_nx_md5_update(md5data, (unsigned char *) realm, realm_length);
_nx_md5_update(md5data, (unsigned char *) ":", 1);
_nx_md5_update(md5data, (unsigned char *) password, password_length);
_nx_md5_digest_calculate(md5data, (unsigned char *) md5_binary);
/* Convert this H(A1) portion to ASCII Hex representation. */
http_hex_ascii_convert(md5_binary, HTTP_MAX_BINARY_MD5, ha1_string);
/* Make the H(A2) portion of the digest. */
_nx_md5_initialize(md5data);
_nx_md5_update(md5data, (unsigned char *) method, method_length);
_nx_md5_update(md5data, (unsigned char *) ":", 1);
_nx_md5_update(md5data, (unsigned char *) uri, uri_length);
_nx_md5_digest_calculate(md5data, (unsigned char *) md5_binary);
/* Convert this H(A2) portion to ASCII Hex representation. */
http_hex_ascii_convert(md5_binary, HTTP_MAX_BINARY_MD5, ha2_string);
/* Now make the final MD5 digest. */
_nx_md5_initialize(md5data);
_nx_md5_update(md5data, (unsigned char *) ha1_string, sizeof(ha1_string) - 1);
_nx_md5_update(md5data, (unsigned char *) ":", 1);
_nx_md5_update(md5data, (unsigned char *) nonce, HTTP_SERVER_NONCE_SIZE);
/* Start of Internet Explorer bug work-around. */
_nx_md5_update(md5data, (unsigned char *) ":", 1);
_nx_md5_update(md5data, (unsigned char *) nc, nc_length);
_nx_md5_update(md5data, (unsigned char *) ":", 1);
_nx_md5_update(md5data, (unsigned char *) cnonce, cnonce_length);
_nx_md5_update(md5data, (unsigned char *) ":auth", 5);
/* End of Internet Explorer bug work-around. */
_nx_md5_update(md5data, (unsigned char *) ":", 1);
_nx_md5_update(md5data, (unsigned char *) ha2_string, sizeof(ha2_string) - 1);
_nx_md5_digest_calculate(md5data, (unsigned char *) md5_binary);
/* Finally, convert the response back to an ASCII string and place in
the destination. */
http_hex_ascii_convert(md5_binary, HTTP_MAX_BINARY_MD5, result);
}
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