96 lines
3.0 KiB
C
96 lines
3.0 KiB
C
/*
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* Copyright (c) 2017,2023 Stephen Heumann
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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struct md5_context {
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unsigned long length;
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unsigned long length2;
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unsigned short extra;
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unsigned char reserved1[30];
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unsigned char hash[16];
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unsigned char reserved2[4];
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unsigned char block[64];
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};
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struct hmac_md5_context {
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union {
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struct md5_context ctx;
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unsigned char k[64];
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} u[3];
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unsigned char inner_hash[16];
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};
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/*
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* The context structure must be in bank 0, preferably page-aligned.
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*/
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/*
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* Initialize a MD5 context.
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* This must be called before any of the other MD5 functions.
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*/
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void md5_init(struct md5_context *context);
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/*
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* Update a MD5 context based on the specified data.
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*/
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void md5_update(struct md5_context *context, const unsigned char *data, unsigned long length);
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/*
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* Finish MD5 processing and generate the final hash code.
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*/
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void md5_finalize(struct md5_context *context);
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/*
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* Process one 64-byte block through the MD5 hashing function.
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* This is a low-level function; users should normally not call this directly.
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*/
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void md5_processblock(struct md5_context *context);
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/*
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* Initialize a context for HMAC-MD5 computation with a specified key.
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* This must be called before any other HMAC calls. After initialization,
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* the context can be used with either hmac_md5_update/hmac_md5_finalize
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* or hmac_md5_compute, but they should not be mixed.
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*/
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void hmac_md5_init(struct hmac_md5_context *context,
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const unsigned char *key,
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unsigned long key_length);
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/*
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* Update an HMAC-MD5 context based on the specified data.
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*/
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void hmac_md5_update(struct hmac_md5_context *context,
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const unsigned char *message_part,
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unsigned long part_length);
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/*
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* Finish HMAC-MD5 processing and generate the final HMAC.
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*/
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void hmac_md5_finalize(struct hmac_md5_context *context);
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/*
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* Compute the HMAC-MD5 of a message as a single operation.
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* The context can be reused for multiple hmac_md5_compute operations.
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*/
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void hmac_md5_compute(struct hmac_md5_context *context,
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const unsigned char *message,
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unsigned long message_length);
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/*
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* Get the result of an HMAC-MD5 computation following hmac_md5_finalize
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* or hmac_md5_compute.
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*/
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#define hmac_md5_result(context) ((context)->u[0].ctx.hash)
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