Difference between revisions of "LlMD5String"
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|func=llMD5String|return_type=string|p1_type=string|p1_name=src|p2_type=integer|p2_name=nonce | |func=llMD5String|return_type=string|p1_type=string|p1_name=src|p2_type=integer|p2_name=nonce | ||
|func_footnote | |func_footnote | ||
|func_desc | |func_desc | ||
|return_text=of 32 hex characters that is the {{Wikipedia|MD5|MD5}} checksum of '''src''' with a {{Wikipedia|Salt_%28cryptography%29|salt}} of ":"+'''nonce'''. | |return_text=of 32 hex characters that is the {{Wikipedia|MD5|MD5}} checksum of '''src''' with a {{Wikipedia|Salt_%28cryptography%29|salt}} of ":"+'''nonce'''. | ||
|spec='''nonce''' is casted to string, then appended to '''src''' after a colon ('''src'''+":"+(string)'''nonce'''). This is important to know if you are calculating a hash in another language and wish to compare with one calculated in LSL. | |spec='''nonce''' is casted to string, then appended to '''src''' after a colon ('''src'''+":"+(string)'''nonce'''). This is important to know if you are calculating a hash in another language and wish to compare with one calculated in LSL. | ||
<BR> | |||
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It is important to note here that '''llMD5String("example",0) != md5("example")''' but, '''llMD5String("example",0) == md5("example:0")''' | |||
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There is no similar '''md5()''' in LSL, because else LSL whould be to easy. It took me 2 hours to find out, 2 precious hours of my life. | |||
LSL strings are stored in the UTF-8 format. | LSL strings are stored in the UTF-8 format. | ||
Revision as of 15:17, 20 November 2011
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Security Warning! |
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The MD5 hashing algorithm should not be used because it is too easy to generate collisions (two inputs which result in the same hash). http://www.kb.cert.org/vuls/id/836068 |
Summary
Function: string llMD5String( string src, integer nonce );| 0.0 | Forced Delay |
| 10.0 | Energy |
Returns a string of 32 hex characters that is the 
MD5 checksum of src with a salt of ":"+nonce.
| • string | src | |||
| • integer | nonce |
Specification
nonce is casted to string, then appended to src after a colon (src+":"+(string)nonce). This is important to know if you are calculating a hash in another language and wish to compare with one calculated in LSL.
It is important to note here that llMD5String("example",0) != md5("example") but, llMD5String("example",0) == md5("example:0")
There is no similar md5() in LSL, because else LSL whould be to easy. It took me 2 hours to find out, 2 precious hours of my life.
LSL strings are stored in the UTF-8 format.
Examples
<lsl> llSay(0, llMD5String("Hello, Avatar!", 0)); // returns 112abd47ceaae1c05a826828650434a6 </lsl>
Linux Example
$ echo -n 'Hello, Avatar!:0' | openssl md5 112abd47ceaae1c05a826828650434a6
See Also
Functions
| • | llSHA1String |
Deep Notes
Signature |
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function string llMD5String( string src, integer nonce ); |