mirror of
https://github.com/sheumann/65816-crypto.git
synced 2024-06-02 16:41:32 +00:00
191a27af86
This is implemented in the common HMAC code and can apply to the other hash algorithms as well, but the header and tests are currently only implemented for HMAC-MD5.
92 lines
2.9 KiB
C
92 lines
2.9 KiB
C
/*
|
|
* Copyright (c) 2017,2023 Stephen Heumann
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
struct md5_context {
|
|
unsigned long length;
|
|
unsigned long length2;
|
|
unsigned short extra;
|
|
unsigned char reserved1[30];
|
|
unsigned char hash[16];
|
|
unsigned char reserved2[4];
|
|
unsigned char block[64];
|
|
};
|
|
|
|
struct hmac_md5_context {
|
|
union {
|
|
struct md5_context ctx;
|
|
unsigned char k[64];
|
|
} u[3];
|
|
unsigned char inner_hash[16];
|
|
};
|
|
|
|
/*
|
|
* The context structure must be in bank 0, preferably page-aligned.
|
|
*/
|
|
|
|
/*
|
|
* Initialize a MD5 context.
|
|
* This must be called before any of the other MD5 functions.
|
|
*/
|
|
void md5_init(struct md5_context *context);
|
|
|
|
/*
|
|
* Update a MD5 context based on the specified data.
|
|
*/
|
|
void md5_update(struct md5_context *context, const unsigned char *data, unsigned long length);
|
|
|
|
/*
|
|
* Finish MD5 processing and generate the final hash code.
|
|
*/
|
|
void md5_finalize(struct md5_context *context);
|
|
|
|
/*
|
|
* Process one 64-byte block through the MD5 hashing function.
|
|
* This is a low-level function; users should normally not call this directly.
|
|
*/
|
|
void md5_processblock(struct md5_context *context);
|
|
|
|
/*
|
|
* Initialize a context for HMAC-MD5 computation with a specified key.
|
|
* This must be called before any other HMAC calls. After initialization,
|
|
* the context can be used with either hmac_md5_update/hmac_md5_finalize
|
|
* or hmac_md5_compute, but they should not be mixed.
|
|
*/
|
|
void hmac_md5_init(struct hmac_md5_context *context,
|
|
const unsigned char *key,
|
|
unsigned long key_length);
|
|
|
|
/*
|
|
* Update an HMAC-MD5 context based on the specified data.
|
|
*/
|
|
void hmac_md5_update(struct hmac_md5_context *context,
|
|
const unsigned char *message_part,
|
|
unsigned long part_length);
|
|
|
|
/*
|
|
* Finish HMAC-MD5 processing and generate the final HMAC.
|
|
* The result will be in context->u[0].ctx.hash.
|
|
*/
|
|
void hmac_md5_finalize(struct hmac_md5_context *context);
|
|
|
|
/*
|
|
* Compute the HMAC-MD5 of a message as a single operation.
|
|
* The result will be in context->u[0].ctx.hash.
|
|
* The context can be reused for multiple hmac_md5_compute operations.
|
|
*/
|
|
void hmac_md5_compute(struct hmac_md5_context *context,
|
|
const unsigned char *message,
|
|
unsigned long message_length);
|