[PHP-DB] md5() function
Hi!! I'm using the md5() function to encrypt a password and store it into a database. Now I want to retrieve that MD5 password and convert it into it's human readable condition. Is there a function opposite to md5()?? Best Regards, M Guirao -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] md5() function
MD5 is also known as an one-way crypt system; you can encryptit but never unencrypted; only using brute force or a hash list you can retrive a 'string' that it's hash is the one stored; but it is not necesary the same original string; this is also known as a hash collision. So, in short... no, there isn't a unMd5(). If you need to retrive the original string, try GPG. On 14/01/2008, Miguel Guirao [EMAIL PROTECTED] wrote: Hi!! I'm using the md5() function to encrypt a password and store it into a database. Now I want to retrieve that MD5 password and convert it into it's human readable condition. Is there a function opposite to md5()?? Best Regards, M Guirao -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- Atte, Andrés G. Montañez Técnico en Redes y Telecomunicaciones Montevideo - Uruguay -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] md5() function
On Jan 14, 2008 2:26 PM, Miguel Guirao [EMAIL PROTECTED] wrote: Hi!! I'm using the md5() function to encrypt a password and store it into a database. Now I want to retrieve that MD5 password and convert it into it's human readable condition. Is there a function opposite to md5()?? Negative. Once it's hashed with an MD5, SHA1, or similar encryption method, it's (as of now) impossible to reverse. You could create a table with a column of unencrypted phrases, characters, and combinations, with a second column containing the correlating hashed string, but that's about it. -- /Dan Daniel P. Brown Senior Unix Geek and #1 Rated Year's Coolest Guy By Self Since Nineteen-Seventy-[mumble]. -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] md5() function
Steven Cruz wrote: Hello; I maybe wrong, but I believe it is one way. What you need to do is take your input and encrypt it and check if matches your current encrypted value. :) peace and hugs. Miguel Guirao wrote: Hi!! I'm using the md5() function to encrypt a password and store it into a database. Now I want to retrieve that MD5 password and convert it into it's human readable condition. Is there a function opposite to md5()?? Best Regards, M Guirao If you want to do a comparison on the md5() hash you just created you could always run your SQL query like: SELECT * FROM `table` WHERE `password` = md5( $password ) LIMIT 1; That will return a true or false value based on the md5() hash of the $password var. But you cannot reverse the md5 hash to obtain the original value unless you perform a crack on it using software available software. I think what you are looking for is the base64_encode() and base64_decode() functions which will perform a simple encoding of data. -- Jason Gerfen I practice my religion while stepping on your toes... ~The Ditty Bops -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP-DB] md5() function
Hello; I maybe wrong, but I believe it is one way. What you need to do is take your input and encrypt it and check if matches your current encrypted value. :) peace and hugs. Miguel Guirao wrote: Hi!! I'm using the md5() function to encrypt a password and store it into a database. Now I want to retrieve that MD5 password and convert it into it's human readable condition. Is there a function opposite to md5()?? Best Regards, M Guirao -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP-DB] Re: php-db Digest 14 Jan 2008 19:48:27 -0000 Issue 3947
Miguel - MD5() is a hash function, not an encryption function. A hash function cannot be reversed. One of the reasons some sites use MD5() for passwords is so that the passwords are never even stored on the server, only the hash. So even the site's database admin can't figure out the passwords of users. A hash is a little like a checksum. Two files can have the same checksum even if they're completely different files. But good luck to you if you want to CREATE a file with a specific checksum. -Peter Is there a function opposite to md5()?? -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
[PHP-DB] Select...
Hello List, I'm having kind of trouble to get done this: Select data from a table, except those data already in a second table. Actually, if there is a rowid in table2, I wont get it from table1, rowid is the key that relates both tables. I just can't express this with a SQL statement!! idequipomed is the key that relates both tables!! So, if idequipomed is already in Table2, I shouldn't get it from Table1. Any suggestions? Table1 FieldType NullKey Default Extra Privileges --- --- -- -- -- -- --- idequipomed tinyint(3) unsigned PRI (NULL) auto_increment select,insert,update,references idcattinyint(3) 0 select,insert,update,references af varchar(10) select,insert,update,references ns varchar(10) select,insert,update,references deptovarchar(40) YES (NULL) select,insert,update,references zona char(3) select,insert,update,references reqcal char(1) YES 1 select,insert,update,references tipocal char(1) select,insert,update,references estado char(2) select,insert,update,references alta date -00-00 select,insert,update,references ubicacionvarchar(15) 0 select,insert,update,references Table2 FieldType NullKey Default Extra Privileges --- --- -- -- --- -- - -- calidtinyint(4) unsigned PRI (NULL) auto_increment select,insert,update,references idequipomed tinyint(4) unsigned 0 select,insert,update,references faseid tinyint(4) unsigned 0 select,insert,update,references ultimacaldate YES (NULL) select,insert,update,references proxcal date YES (NULL) select,insert,update,references idcattinyint(4) unsigned 0 select,insert,update,references -Original Message- From: Daniel Brown [mailto:[EMAIL PROTECTED] Sent: Lunes, 14 de Enero de 2008 01:55 p.m. To: Miguel Guirao Cc: php-db@lists.php.net Subject: Re: [PHP-DB] md5() function On Jan 14, 2008 2:26 PM, Miguel Guirao [EMAIL PROTECTED] wrote: Hi!! I'm using the md5() function to encrypt a password and store it into a database. Now I want to retrieve that MD5 password and convert it into it's human readable condition. Is there a function opposite to md5()?? Negative. Once it's hashed with an MD5, SHA1, or similar encryption method, it's (as of now) impossible to reverse. You could create a table with a column of unencrypted phrases, characters, and combinations, with a second column containing the correlating hashed string, but that's about it. -- /Dan Daniel P. Brown Senior Unix Geek and #1 Rated Year's Coolest Guy By Self Since Nineteen-Seventy-[mumble]. -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP-DB] md5() function
Thanks every body for your replies!! It is clear to me that I can not reverse a hased string!! Thanks!!! Guirao -Original Message- From: Jason Gerfen [mailto:[EMAIL PROTECTED] Sent: Lunes, 14 de Enero de 2008 02:04 p.m. Cc: php-db@lists.php.net Subject: Re: [PHP-DB] md5() function Steven Cruz wrote: Hello; I maybe wrong, but I believe it is one way. What you need to do is take your input and encrypt it and check if matches your current encrypted value. :) peace and hugs. Miguel Guirao wrote: Hi!! I'm using the md5() function to encrypt a password and store it into a database. Now I want to retrieve that MD5 password and convert it into it's human readable condition. Is there a function opposite to md5()?? Best Regards, M Guirao If you want to do a comparison on the md5() hash you just created you could always run your SQL query like: SELECT * FROM `table` WHERE `password` = md5( $password ) LIMIT 1; That will return a true or false value based on the md5() hash of the $password var. But you cannot reverse the md5 hash to obtain the original value unless you perform a crack on it using software available software. I think what you are looking for is the base64_encode() and base64_decode() functions which will perform a simple encoding of data. -- Jason Gerfen I practice my religion while stepping on your toes... ~The Ditty Bops -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
