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75 lines
2.2 KiB
75 lines
2.2 KiB
3 months ago
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/*
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* UCW Library -- MD5 Message Digest
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*
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* This file is in public domain (see ucw/md5.c).
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*/
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#ifndef _UCW_MD5_H
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#define _UCW_MD5_H
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#ifdef CONFIG_UCW_CLEAN_ABI
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#define md5_final ucw_md5_final
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#define md5_hash_buffer ucw_md5_hash_buffer
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#define md5_init ucw_md5_init
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#define md5_transform ucw_md5_transform
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#define md5_update ucw_md5_update
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#endif
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/**
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* Internal MD5 hash state.
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* You should use it just as an opaque handle only.
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*/
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typedef struct {
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u32 buf[4];
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u32 bits[2];
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byte in[64];
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} md5_context;
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void md5_init(md5_context *context); /** Initialize the MD5 hashing algorithm in @context. **/
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/**
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* Push another @len bytes of data from @buf to the MD5 hash
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* represented by @context. You can call it multiple time on the same
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* @context without reinitializing it and the result will be the same
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* as if you concatenated all the data together and fed them here all at
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* once.
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*/
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void md5_update(md5_context *context, const byte *buf, uint len);
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/**
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* Call this after the last @md5_update(). It will terminate the
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* algorithm and return a pointer to the result.
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*
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* Note that the data it points to are stored inside the @context, so
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* if you use it to compute another hash or it ceases to exist, the
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* pointer becomes invalid.
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*
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* To convert the hash to its usual hexadecimal representation, see
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* <<string:mem_to_hex()>>.
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*/
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byte *md5_final(md5_context *context);
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/**
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* This is the core routine of the MD5 algorithm. It takes 16 longwords of
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* data in @in and transforms the hash in @buf according to them.
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*
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* You probably do not want to call this one directly.
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*/
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void md5_transform(u32 buf[4], const u32 in[16]);
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/**
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* MD5 one-shot convenience method. It takes @length bytes from
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* @buffer, creates the hash from them and returns it in @output.
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*
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* It is equivalent to this code:
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*
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* md5_context c;
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* md5_init(&c);
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* md5_update(&c, buffer, length);
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* memcpy(outbuf, md5_final(&c), MD5_SIZE);
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*/
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void md5_hash_buffer(byte *outbuf, const byte *buffer, uint length);
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#define MD5_HEX_SIZE 33 /** How many bytes a string buffer for MD5 in hexadecimal format should have. **/
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#define MD5_SIZE 16 /** Number of bytes the MD5 hash takes in the binary form. **/
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#endif /* !_UCW_MD5_H */
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