X-Git-Url: https://jxself.org/git/?a=blobdiff_plain;f=tfcrypt.c;h=719eff811b0a72b48319b78c80dfd42ab1650301;hb=c218fb98af0fbcba962101873756f76f66f4e4e9;hp=fb3dfb9cb44a7e0826dc059c13c555ef7ecbc761;hpb=c0dc5614a87ed6d0eed4906447171ef4c73b306e;p=tfcrypt.git

diff --git a/tfcrypt.c b/tfcrypt.c
index fb3dfb9..719eff8 100644
--- a/tfcrypt.c
+++ b/tfcrypt.c
@@ -28,6 +28,8 @@
 
 #include "tfcrypt.h"
 
+static tfc_byte svctr[TF_BLOCK_SIZE];
+
 static int getps_filter(struct getpasswd_state *getps, char chr, size_t pos)
 {
 	if (chr == '\x03') {
@@ -113,6 +115,7 @@ int main(int argc, char **argv)
 	double td;
 	char *s, *d, *t, *stoi;
 	size_t x, n;
+	tfc_fsize rwd;
 
 	progname = basename(argv[0]);
 
@@ -128,8 +131,14 @@ int main(int argc, char **argv)
 _baddfname:
 	memset(s, 0, n);
 
+	if (!strcmp(progname, "iotool")) {
+		do_edcrypt = TFC_DO_PLAIN;
+		password = YES;
+		ctr_mode = TFC_MODE_PLAIN;
+	}
+
 	opterr = 0;
-	while ((c = getopt(argc, argv, "L:s:aU:C:r:K:t:Pkzxc:l:qedn:vV:pwE:O:S:AmM:R:Z:WHD:")) != -1) {
+	while ((c = getopt(argc, argv, "L:s:aU:C:r:K:t:Pkzxc:l:qedn:vV:pwE:O:S:AmuM:R:Z:WHD:")) != -1) {
 		switch (c) {
 			case 'L':
 				read_defaults(optarg, NO);
@@ -195,10 +204,10 @@ _baddfname:
 				ctr_mode = TFC_MODE_PLAIN;
 				break;
 			case 'e':
-				do_edcrypt = TFC_DO_ENCRYPT;
+				if (do_edcrypt != TFC_DO_PLAIN) do_edcrypt = TFC_DO_ENCRYPT;
 				break;
 			case 'd':
-				do_edcrypt = TFC_DO_DECRYPT;
+				if (do_edcrypt != TFC_DO_PLAIN) do_edcrypt = TFC_DO_DECRYPT;
 				break;
 			case 'D':
 				macbits = strtoul(optarg, &stoi, 10);
@@ -495,9 +504,11 @@ _baddfname:
 					do_mac_file = optarg;
 				break;
 			case 'm':
+			case 'u':
 				if (do_mac != TFC_MAC_VRFY)
 					xerror(NO, YES, YES, "signature source was not specified");
 				do_mac = TFC_MAC_JUST_VRFY;
+				if (c == 'u') do_mac = TFC_MAC_JUST_VRFY2;
 				break;
 			case 'R':
 			case 'Z':
@@ -635,7 +646,7 @@ _nosalt:
 			lrem = lblock = sizeof(tmpdata);
 			if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(mkfd);
 _mkragain:		lio = xread(mkfd, pblk, lrem);
-			if (lio == 0) do_stop = YES;
+			if (lio == 0 && do_stop == NO) do_stop = YES;
 			if (lio != NOSIZE) ldone += lio;
 			else {
 				if (errno != EIO && catch_all_errors != YES)
@@ -1018,6 +1029,7 @@ _xts2genkey:	if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerro
 
 	tfc_data_to_words64(&iseek_blocks, sizeof(iseek_blocks));
 	tf_ctr_set(ctr, &iseek_blocks, sizeof(iseek_blocks));
+	if (do_mac == TFC_MAC_JUST_VRFY2) memcpy(svctr, ctr, TF_BLOCK_SIZE);
 
 	if (counter_opt == TFC_CTR_SHOW) {
 		switch (do_outfmt) {
@@ -1059,7 +1071,6 @@ _plain:
 	sigact.sa_flags = SA_RESTART;
 	sigact.sa_handler = print_crypt_status;
 	sigaction(SIGUSR1, &sigact, NULL);
-	sigaction(SIGTSTP, &sigact, NULL);
 	sigaction(SIGALRM, &sigact, NULL);
 	if (status_timer) setup_next_alarm(status_timer);
 	sigact.sa_handler = change_status_width;
@@ -1070,11 +1081,14 @@ _plain:
 		sigact.sa_handler = print_crypt_status;
 		sigaction(SIGINT, &sigact, NULL);
 		sigaction(SIGTERM, &sigact, NULL);
+		sigaction(SIGTSTP, &sigact, NULL);
 	}
 	else {
 		sigact.sa_handler = exit_sigterm;
 		sigaction(SIGINT, &sigact, NULL);
 		sigaction(SIGTERM, &sigact, NULL);
+		sigact.sa_handler = handle_sigtstp;
+		sigaction(SIGTSTP, &sigact, NULL);
 	}
 	memset(&sigact, 0, sizeof(struct sigaction));
 
@@ -1100,6 +1114,24 @@ _ctrwagain:	lio = xwrite(dfd, pblk, lrem);
 
 	if (ctr_mode == TFC_MODE_STREAM) tfe_init_iv(&tfe, key, ctr);
 
+	if (do_mac == TFC_MAC_JUST_VRFY2) {
+		rwd = tfc_fdgetpos(sfd);
+		if (rwd == NOFSIZE) {
+			tfc_esay("%s: WARNING: input is not seekable, disabling MAC testing mode", progname);
+			do_mac = TFC_MAC_VRFY;
+		}
+		goto _nodecrypt_again_vrfy2;
+
+_decrypt_again_vrfy2:
+		if (lseek(sfd, (off_t)rwd, SEEK_SET) == ((off_t)-1)) {
+			xerror(ignore_seek_errors, NO, YES, "MAC testing seek failed");
+		}
+		total_processed_src = rwd;
+		memcpy(ctr, svctr, TF_BLOCK_SIZE);
+		memset(svctr, 0, TF_BLOCK_SIZE);
+	}
+
+_nodecrypt_again_vrfy2:
 	errno = 0;
 	do_stop = NO;
 	while (1) {
@@ -1109,7 +1141,7 @@ _ctrwagain:	lio = xwrite(dfd, pblk, lrem);
 		lrem = lblock = blk_len_adj(maxlen, total_processed_src, blksize);
 		if (error_action == TFC_ERRACT_SYNC) rdpos = tfc_fdgetpos(sfd);
 _ragain:	lio = xread(sfd, pblk, lrem);
-		if (lio == 0) do_stop = TFC_STOP_BEGAN;
+		if (lio == 0) do_stop = YES;
 		if (lio != NOSIZE) ldone += lio;
 		else {
 			if (errno != EIO && catch_all_errors != YES)
@@ -1169,7 +1201,7 @@ _ragain:	lio = xread(sfd, pblk, lrem);
 
 		if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
 			skein_update(&sk, dstblk, ldone);
-		if (do_mac == TFC_MAC_JUST_VRFY) goto _nowrite;
+		if (do_mac >= TFC_MAC_JUST_VRFY) goto _nowrite;
 
 		pblk = dstblk;
 		lrem = ldone;
@@ -1183,14 +1215,16 @@ _wagain:	lio = xwrite(dfd, pblk, lrem);
 			lrem -= lio;
 			goto _wagain;
 		}
+		total_written_dst += ldone;
 _nowrite:	total_processed_dst += ldone;
 		delta_processed += ldone;
 
-		if (maxlen != NOFSIZE && total_processed_src >= maxlen) break;
+		if (maxlen != NOFSIZE && total_processed_src >= maxlen) {
+			do_stop = YES;
+			break;
+		}
 	}
 
-	if (do_stop == TFC_STOP_FULL) goto _nomac;
-
 	errno = 0;
 	if (do_mac >= TFC_MAC_VRFY) {
 		if (!do_mac_file) {
@@ -1266,10 +1300,18 @@ _macragain:		lio = xread(sfd, pblk, lrem);
 					else mehexdump(macresult, TF_FROM_BITS(macbits), TF_FROM_BITS(macbits), YES);
 				}
 			}
+			if (do_mac == TFC_MAC_JUST_VRFY2) {
+				if (verbose) tfc_esay("%s: -u: MAC signature is valid, proceeding with decrypting it again", progname);
+				do_mac = TFC_MAC_DROP;
+				goto _decrypt_again_vrfy2;
+			}
 		}
 		else {
-			if (quiet == NO) tfc_esay("%s: signature is BAD: "
+			if (quiet == NO) {
+				tfc_esay("%s: signature is BAD: "
 				"wrong password, key, mode, or file is not signed", progname);
+				if (do_mac == TFC_MAC_JUST_VRFY2) tfc_esay("%s: -u: MAC signature is invalid, not decrypting it again", progname);
+			}
 			exitcode = 1;
 		}
 
@@ -1335,16 +1377,7 @@ _macwagain:		lio = xwrite(dfd, pblk, lrem);
 		memset(tmpdata, 0, sizeof(tmpdata));
 	}
 
-_nomac:
-	if (verbose || status_timer || do_stop == TFC_STOP_FULL) print_crypt_status(0);
-
-	if (do_preserve_time) fcopy_matime(dfd, &s_stat);
-	xclose(sfd);
-	if (do_ftrunc > TFC_NO_FTRUNC) {
-		if (do_ftrunc == TFC_FTRUNC_TAIL) ftrunc_dfd = total_processed_dst;
-		if (ftruncate(dfd, (off_t)ftrunc_dfd) == -1) xerror(YES, NO, YES, "ftruncate(%d)", dfd);
-	}
-	xclose(dfd);
+	if (verbose || status_timer || (do_stop == YES && quiet == NO)) print_crypt_status(0);
 
 	xexit(exitcode);
 	return -1;