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XCRYPT(3) Linux Programmer's Manual XCRYPT(3) NAME xencrypt, xdecrypt, passwd2des - RFS password encryption SYNOPSIS #include <rpc/des_crypt.h> void passwd2des(char *passwd, char *key); int xencrypt(char *secret, char *passwd); int xdecrypt(char *secret, char *passwd); DESCRIPTION WARNING: Do not use these functions in new code. They do not achieve any type of acceptable cryptographic security guarantees. The function passwd2des() takes a character string passwd of arbitrary length and fills a character array key of length 8. The array key is suitable for use as DES key. It has odd parity set in bit 0 of each byte. Both other functions described here use this function to turn their argument passwd into a DES key. The xencrypt() function takes the ASCII character string secret given in hex, which must have a length that is a multiple of 16, encrypts it using the DES key derived from passwd by passwd2des(), and outputs the result again in secret as a hex string of the same length. The xdecrypt() function performs the converse operation. RETURN VALUE The functions xencrypt() and xdecrypt() return 1 on success and 0 on error. VERSIONS These functions are available in glibc since version 2.1. ATTRIBUTES For an explanation of the terms used in this section, see attributes(7). ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ¬ββββββββββββββββ¬ββββββββββ βInterface β Attribute β Value β ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββΌββββββββββββββββΌββββββββββ€ βpasswd2des(), xencrypt(), xdecrypt() β Thread safety β MT-Safe β ββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββββ΄ββββββββββββββββ΄ββββββββββ BUGS The prototypes are missing from the abovementioned include file. SEE ALSO cbc_crypt(3) 2021-03-22 XCRYPT(3)