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Encrypt a password
#include <unistd.h>
char * crypt( const char * key,
const char * salt );
- key
- A NUL-terminated string (normally a password typed by a user).
- salt
- A two-character string chosen from the set
[a-zA-Z0-9./].
This function doesn't validate the values for salt, and values
outside this range may cause undefined behavior.
This string is used to perturb the algorithm in one of 4096 different ways.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
|
This function is in libc.a, but not in libc.so
(in order to save space). |
The crypt() function performs password encryption.
It's based on the Data Encryption Standard algorithm,
and also includes code to deter key search attempts.
|
This function checks only the first eight characters of key. |
You can obtain a 56-bit key by taking the lowest 7 bits of key.
The 56-bit key is used to repeatedly encrypt a constant string (usually all zeroes).
A pointer to the 13-character encrypted value, or NULL on failure.
The first two characters of the encrypted value are the salt itself.
POSIX 1003.1 XSI
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
No |
The return value points to static data that's overwritten by each call to crypt().
encrypt(),
getpass(),
qnx_crypt(),
setkey()
login
in the Utilities Reference
Copyright
© MINIX Operating System
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