Difference between revisions of "83Plus:BCALLs:8090"
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| − | [[Category:83Plus:BCALLs:By Name: | + | [[Category:83Plus:BCALLs:By Name:Cryptography|MD5Update]] |
[[Category:83Plus:BCALLs:By Name|MD5Update]] | [[Category:83Plus:BCALLs:By Name|MD5Update]] | ||
[[Category:83Plus:BCALLs:By Address|8090 - MD5Update]] | [[Category:83Plus:BCALLs:By Address|8090 - MD5Update]] | ||
Revision as of 18:50, 29 March 2005
Contents
Synopsis
Official Name: MD5Update
Other Name: CalculateMD5
BCALL Address: 8090
Calculates the MD5 checksum
Inputs
- BC: The length of the data
- HL: The location of the data
Outputs
- 8269: (8 bytes) Holds the length in bits of the data hashed so far.
- 8292: (16 bytes) Will be changed to contain the new (incremental) MD5 hash of the data you gave it
Destroys
- 8259: (16 bytes) Alternate registers (roughly equivalent to the AA, BB, CC, and DD registers specified in the MD5 standard.)
- 83A5: (64 bytes) Buffer holding data to be hashed.
Comments
This B_CALL incrementally changes the MD5 "registers" for the data you give it. Note that the registers must be initialized using MD5Init first. You can call this B_CALL as many times as you want to add many separate chunks of data to the hash. To complete the MD5 hash, use MD5Final.
Example
B_CALL InitializeMD5 ld bc,0040h ld hl,SomeAddress B_CALL CalculateMD5 B_CALL FinishMD5
Credits and Contributions
- FloppusMaximus: For testing that this B_CALL also work with lengths unequal to 64 bytes
