2468a7058d
git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@886 ec53bebd-3082-4978-b11e-865c3cabbd6b
109 lines
2.1 KiB
C
109 lines
2.1 KiB
C
#ifdef HAVE_CONFIG_H
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#include "config.h"
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RCSID("$Id$");
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#endif
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#include "otp_locl.h"
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void *
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otp_db_open ()
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{
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DBM *ret;
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int lock;
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do {
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struct stat statbuf;
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lock = open (OTP_DB_LOCK, O_WRONLY | O_CREAT | O_EXCL, 0666);
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if (lock >= 0) {
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close(lock);
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break;
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}
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if (stat (OTP_DB_LOCK, &statbuf) < 0)
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if (errno == ENOENT)
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continue;
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else
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return NULL;
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if (time(NULL) - statbuf.st_mtime > OTP_DB_TIMEOUT)
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unlink (OTP_DB_LOCK);
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} while(1);
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return dbm_open (OTP_DB, O_RDWR | O_CREAT, 0600);
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}
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void
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otp_db_close (void *dbm)
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{
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dbm_close ((DBM *)dbm);
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unlink (OTP_DB_LOCK);
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}
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/*
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* Read this entry from the database and lock it.
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*/
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int
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otp_get (void *v, OtpContext *ctx)
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{
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DBM *dbm = (DBM *)v;
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datum dat, key;
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unsigned char *p;
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time_t now, then;
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key.dsize = strlen(ctx->user);
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key.dptr = ctx->user;
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dat = dbm_fetch (dbm, key);
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if (dat.dptr == NULL)
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return -1;
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p = dat.dptr;
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time(&now);
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memcpy (&then, p, sizeof(then));
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if (then && now - then < OTP_USER_TIMEOUT)
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return -1;
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memcpy (p, &now, sizeof(now));
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p += sizeof(now);
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ctx->alg = otp_find_alg (p);
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if (ctx->alg == NULL)
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return -1;
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p += strlen(p) + 1;
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ctx->n = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
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p += 4;
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memcpy (ctx->key, p, OTPKEYSIZE);
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p += OTPKEYSIZE;
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strncpy (ctx->seed, p, sizeof(ctx->seed));
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ctx->seed[sizeof(ctx->seed) - 1] = '\0';
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return dbm_store (dbm, key, dat, DBM_REPLACE);
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}
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/*
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* Write this entry to the database.
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*/
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int
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otp_put (void *v, OtpContext *ctx)
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{
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DBM *dbm = (DBM *)v;
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datum dat, key;
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unsigned char buf[1024], *p;
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time_t zero = 0;
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key.dsize = strlen(ctx->user);
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key.dptr = ctx->user;
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p = buf;
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memcpy (p, &zero, sizeof(zero));
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p += sizeof(zero);
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strcpy (p, ctx->alg->name);
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p += strlen(p) + 1;
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*p++ = (ctx->n >> 24) & 0xFF;
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*p++ = (ctx->n >> 16) & 0xFF;
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*p++ = (ctx->n >> 8) & 0xFF;
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*p++ = (ctx->n >> 0) & 0xFF;
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memcpy (p, ctx->key, OTPKEYSIZE);
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p += OTPKEYSIZE;
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strcpy (p, ctx->seed);
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p += strlen(p) + 1;
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dat.dptr = buf;
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dat.dsize = p - buf;
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return dbm_store (dbm, key, dat, DBM_REPLACE);
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}
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