Difference between revisions of "83Plus:BCALLs:8090"
From WikiTI
(→Example) |
(→Comments) |
||
| Line 21: | Line 21: | ||
== Comments == | == Comments == | ||
| − | This B_CALL incrementally changes the | + | This B_CALL incrementally changes the MD5 "registers" for the data you give it. Note that the registers must be initialized using [[83Plus:BCALLs:808D|808D]] 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 [[83Plus:BCALLs:8018|8018]]. |
== Example == | == Example == | ||
Revision as of 18:25, 27 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: (4 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 808D 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 8018.
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
