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/*
* This function is a front-end for the message digest algorithms used
* to compute the user's encrypted passwords. No reversible encryption
* is used here and I intend to keep it that way.
*
* While there are many sources of encryption outside the United
* States, it *may* be illegal to re-export reversible encryption
* computer code. Until such time as it is legal to export encryption
* software freely from the US, please do not send me any. (AGM)
*/
/* this should have been defined in a header file.. Why wasn't it? AGM */
extern char *crypt(const char *key, const char *salt);
#include "md5.h"
#include "bigcrypt.-c"
struct cfns {
const char *salt;
int len;
char * (* mdfn)(const char *key, const char *salt);
};
/* array of non-standard digest algorithms available */
#define N_MDS 1
const static struct cfns cfn_list[N_MDS] = {
{ "$1$", 3, Goodcrypt_md5 },
};
static char *_pam_md(const char *key, const char *salt)
{
char *x,*e=NULL;
int i;
D(("called with key='%s', salt='%s'", key, salt));
/* check for non-standard salts */
for (i=0; i<N_MDS; ++i) {
if ( !strncmp(cfn_list[i].salt, salt, cfn_list[i].len) ) {
e = cfn_list[i].mdfn(key, salt);
break;
}
}
if ( i >= N_MDS ) {
e = bigcrypt(key, salt); /* (defaults to standard algorithm) */
}
x = x_strdup(e); /* put e in malloc()ed memory */
_pam_overwrite(e); /* clean up */
return x; /* this must be deleted elsewhere */
}
#ifndef PWDB_NO_MD_COMPAT
static char *_pam_md_compat(const char *key, const char *salt)
{
char *x,*e=NULL;
D(("called with key='%s', salt='%s'", key, salt));
if ( !strncmp("$1$", salt, 3) ) {
e = Brokencrypt_md5(key, salt);
x = x_strdup(e); /* put e in malloc()ed memory */
_pam_overwrite(e); /* clean up */
} else {
x = x_strdup(""); /* called from only one place so this is safe */
}
return x; /* this must be deleted elsewhere */
}
#endif /* PWDB_NO_MD_COMPAT */
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