X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=tfc_base64.c;h=c76fdd90dfe912e809dd8d5d2cc257fb72f198fd;hb=cd6f1f9a84c17dbdf6ab320a04eae300502b898d;hp=b92ac9676a3bc567aaf97f167201cb1bb1b0e8d0;hpb=efa545d64b910923248233618e774ca3b87efebb;p=tfcrypt.git

diff --git a/tfc_base64.c b/tfc_base64.c
index b92ac96..c76fdd9 100644
--- a/tfc_base64.c
+++ b/tfc_base64.c
@@ -2,7 +2,7 @@
  * tfcrypt -- high security Threefish encryption tool.
  *
  * tfcrypt is copyrighted:
- * Copyright (C) 2012-2018 Andrey Rys. All rights reserved.
+ * Copyright (C) 2012-2019 Andrey Rys. All rights reserved.
  *
  * tfcrypt is licensed to you under the terms of std. MIT/X11 license:
  *
@@ -28,6 +28,8 @@
 
 #include "tfcrypt.h"
 
+enum { TFB64_STOP1 = 1, TFB64_STOPF };
+
 void do_edbase64(char **fargv)
 {
 	struct base64_decodestate dstate;
@@ -68,8 +70,9 @@ void do_edbase64(char **fargv)
 		pblk = srcblk;
 		lblock = lrem = do_edcrypt == TFC_DO_DECRYPT ? TFC_B64_DWIDTH : TFC_B64_EWIDTH;
 		ldone = 0;
-_again:		lio = read(sfd, pblk, lrem);
-		if (lio == 0) do_stop = YES;
+		if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
+_again:		lio = xread(sfd, pblk, lrem);
+		if (lio == 0) do_stop = TFB64_STOP1;
 		if (lio != NOSIZE) ldone += lio;
 		else {
 			if (errno != EIO && catch_all_errors != YES)
@@ -77,10 +80,12 @@ _again:		lio = read(sfd, pblk, lrem);
 			switch (error_action) {
 				case TFC_ERRACT_CONT: xerror(YES, NO, NO, "%s", fargv[0]); goto _again; break;
 				case TFC_ERRACT_SYNC:
+				case TFC_ERRACT_LSYNC:
 					xerror(YES, NO, NO, "%s", fargv[0]);
 					lio = ldone = lrem = lblock;
 					memset(srcblk, 0, lio);
-					lseek(sfd, lio, SEEK_CUR);
+					if (rdpos == NOFSIZE) lseek(sfd, lio, SEEK_CUR);
+					else lseek(sfd, rdpos + lio, SEEK_SET);
 					break;
 				default: xerror(NO, NO, NO, "%s", fargv[0]); break;
 			}
@@ -105,18 +110,18 @@ _again:		lio = read(sfd, pblk, lrem);
 
 		pblk = dstblk;
 		if (ldone == 0) {
-			do_stop = TFC_STOP_FULL;
+			do_stop = TFB64_STOPF;
 			break;
 		}
 		lrem = ldone;
 		ldone = 0;
-_wagain:	lio = write(dfd, pblk, lrem);
+_wagain:	lio = xwrite(dfd, pblk, lrem);
 		if (lio != NOSIZE) ldone += lio;
 		else xerror(NO, NO, NO, "%s", fargv[1]);
 		if (do_edcrypt == TFC_DO_ENCRYPT) {
 			size_t t;
-			if (lread >= lblock || do_stop == TFC_STOP_FULL) {
-				t = write(dfd, "\n", 1);
+			if (lread >= lblock || do_stop == TFB64_STOPF) {
+				t = xwrite(dfd, "\n", 1);
 				if (t != NOSIZE) lio += t;
 				else lio = NOSIZE;
 			}
@@ -131,13 +136,13 @@ _wagain:	lio = write(dfd, pblk, lrem);
 		}
 	}
 
-	if (do_edcrypt == TFC_DO_ENCRYPT && do_stop == TFC_STOP_BEGAN) {
+	if (do_edcrypt == TFC_DO_ENCRYPT && do_stop == TFB64_STOP1) {
 		size_t t = estate.count;
 		pblk = dstblk + estate.count;
 		base64_encode_blockend((char *)dstblk, &estate);
 		lrem = estate.count - t;
 		ldone = 0;
-		do_stop = TFC_STOP_FULL;
+		do_stop = TFB64_STOPF;
 		goto _wagain;
 	}