tfstream: add separate xor_block function
[tfcrypt.git] / tfcrypt.c
index 5630a391a6c1798393308d810599512645f9f69b..88420817cbf9d4004a226bfa4ba6ce959d144a93 100644 (file)
--- a/tfcrypt.c
+++ b/tfcrypt.c
@@ -34,11 +34,14 @@ static tfc_fsize rwd, do_read_loops, loopcnt;
 static void open_log(const char *logfile)
 {
        int fd;
+       tfc_yesno ro;
 
        if (!strcmp(logfile, "-")) return;
 
-       fd = open(logfile, O_WRONLY | O_CREAT | O_LARGEFILE | O_TRUNC, 0666);
-       if (fd == -1) xerror(NO, NO, YES, "%s", logfile);
+       ro = read_only;
+       read_only = NO;
+       fd = xopen(logfile, O_WRONLY | O_CREAT | O_LARGEFILE | O_TRUNC);
+       read_only = ro;
        xclose(2);
        if (dup2(fd, 2) == -1) xexit(2);
        xclose(fd);
@@ -209,8 +212,6 @@ _baddfname:
                                        ctr_mode = TFC_MODE_ECB;
                                else if (!strcasecmp(optarg, "xts"))
                                        ctr_mode = TFC_MODE_XTS;
-                               else if (!strcasecmp(optarg, "ocb"))
-                                       ctr_mode = TFC_MODE_OCB;
                                else xerror(NO, YES, YES, "%s: invalid mode of operation", optarg);
                                break;
                        case 'P':
@@ -311,10 +312,16 @@ _baddfname:
                                                write_flags |= O_SYNC;
                                        else if (!strcmp(s, "trunc"))
                                                write_flags |= O_TRUNC;
+                                       else if (!strcmp(s, "append"))
+                                               write_flags |= O_APPEND;
                                        else if (!strcmp(s, "fsync"))
                                                do_fsync = YES;
                                        else if (!strcmp(s, "pad"))
                                                do_pad = YES;
+                                       else if (!strcmp(s, "ro"))
+                                               read_only = YES;
+                                       else if (!strcmp(s, "rw"))
+                                               read_only = NO;
                                        else if (!strcmp(s, "xtime"))
                                                do_preserve_time = YES;
                                        else if (!strcmp(s, "gibsize"))
@@ -355,7 +362,7 @@ _baddfname:
                                                        "%s: invalid block size value", s);
                                                }
                                                else blksize = (size_t)tfc_modifysize((tfc_fsize)blksize, strchr(s, ':'));
-                                               if (blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
+                                               if (do_edcrypt != TFC_DO_PLAIN && blksize < TF_BLOCK_SIZE) xerror(NO, YES, YES,
                                                        "%s: block size is lesser than TF_BLOCK_SIZE (%u bytes)", s, TFC_U(TF_BLOCK_SIZE));
                                                if (blksize > TFC_BLKSIZE) xerror(NO, YES, YES,
                                                        "%s: block size exceeds %u bytes",
@@ -447,6 +454,33 @@ _baddfname:
                                                }
                                                else oseek = tfc_modifysize(oseek, strchr(s, ':'));
                                        }
+                                       else if (!strncmp(s, "ioseek", 6) && *(s+6) == '=') {
+                                               s += 7;
+
+                                               iseek = tfc_humanfsize(s, &stoi);
+                                               if (!str_empty(stoi)) {
+                                                       iseek = tfc_fnamesize(s, YES);
+                                                       iseek = tfc_modifysize(iseek, strchr(s, ':'));
+                                                       if (iseek == NOFSIZE) xerror(NO, YES, YES,
+                                                       "%s: invalid iseek value", s);
+                                               }
+                                               else iseek = tfc_modifysize(iseek, strchr(s, ':'));
+                                               if (ctr_mode != TFC_MODE_PLAIN && iseek % TF_BLOCK_SIZE)
+                                                       xerror(NO, YES, YES,
+                                                               "%s: not round to TF block size "
+                                                               "of %u bytes",
+                                                               s, TFC_U(TF_BLOCK_SIZE));
+                                               iseek_blocks = iseek / TF_BLOCK_SIZE;
+
+                                               oseek = tfc_humanfsize(s, &stoi);
+                                               if (!str_empty(stoi)) {
+                                                       oseek = tfc_fnamesize(s, YES);
+                                                       oseek = tfc_modifysize(oseek, strchr(s, ':'));
+                                                       if (oseek == NOFSIZE) xerror(NO, YES, YES,
+                                                       "%s: invalid oseek value", s);
+                                               }
+                                               else oseek = tfc_modifysize(oseek, strchr(s, ':'));
+                                       }
                                        else if (!strncmp(s, "count", 5) && *(s+5) == '=') {
                                                s += 6;
                                                maxlen = tfc_humanfsize(s, &stoi);
@@ -648,8 +682,7 @@ _baddfname:
                if (!strcasecmp(saltf, "disable")) goto _nosalt;
 
                if (!strcmp(saltf, "-")) saltfd = 0;
-               else saltfd = open(saltf, O_RDONLY | O_LARGEFILE);
-               if (saltfd == -1) xerror(NO, NO, YES, "%s", saltf);
+               else saltfd = xopen(saltf, O_RDONLY | O_LARGEFILE);
                lio = xread(saltfd, tfc_salt, TFC_MAX_SALT - TF_FROM_BITS(TFC_KEY_BITS));
                if (lio == NOSIZE) xerror(NO, NO, YES, "%s", saltf);
                tfc_saltsz = lio;
@@ -662,8 +695,7 @@ _nosalt:
                tfc_yesno do_stop;
 
                if (!strcmp(mackeyf, "-")) mkfd = 0;
-               else mkfd = open(mackeyf, O_RDONLY | O_LARGEFILE);
-               if (mkfd == -1) xerror(NO, NO, YES, "%s", mackeyf);
+               else mkfd = xopen(mackeyf, O_RDONLY | O_LARGEFILE);
 
                skein_init(&sk, TFC_KEY_BITS);
 
@@ -738,8 +770,7 @@ _mkragain:          lio = xread(mkfd, pblk, lrem);
        if (argv[idx]) {
                if (password || rawkey > TFC_RAWKEY_KEYFILE) goto _nokeyfd;
                if (!strcmp(argv[idx], "-")) kfd = 0;
-               else kfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
-               if (kfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
+               else kfd = xopen(argv[idx], O_RDONLY | O_LARGEFILE);
 
                lio = strnlen(argv[idx], PATH_MAX);
                memset(argv[idx], '*', lio);
@@ -767,11 +798,10 @@ _nokeyfd:
        if (argv[idx]) {
                if (!strcmp(argv[idx], "-") && kfd) sfd = 0;
                else {
-                       sfd = open(argv[idx], O_RDONLY | O_LARGEFILE);
+                       sfd = xopen(argv[idx], O_RDONLY | O_LARGEFILE);
                        if (do_preserve_time) if (fstat(sfd, &s_stat) == -1)
                                xerror(YES, NO, YES, "stat(%s)", argv[idx]);
                }
-               if (sfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
 
                if ((do_mac >= TFC_MAC_VRFY || do_mac <= TFC_MAC_DROP) && !do_mac_file) {
                        maxlen = tfc_fdsize(sfd);
@@ -796,8 +826,7 @@ _nokeyfd:
                int ctrfd;
 
                if (!strcmp(counter_file, "-")) ctrfd = 0;
-               else ctrfd = open(counter_file, O_RDONLY | O_LARGEFILE);
-               if (ctrfd == -1) xerror(NO, NO, YES, "%s", counter_file);
+               else ctrfd = xopen(counter_file, O_RDONLY | O_LARGEFILE);
                lio = xread(ctrfd, ctr, ctrsz);
                if (lio == NOSIZE) xerror(NO, NO, YES, "%s", counter_file);
                if (lio < ctrsz) xerror(NO, YES, YES, "counter file is too small (%zu)!", lio);
@@ -997,8 +1026,7 @@ _pwdagain: memset(&getps, 0, sizeof(struct getpasswd_state));
 
                pblk = key;
                if (!strcmp(genkeyf, "-")) krfd = 1;
-               else krfd = open(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
-               if (krfd == -1) xerror(NO, NO, YES, "%s", genkeyf);
+               else krfd = xopen(genkeyf, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags);
 _xts2genkey:   if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerror(NO, NO, YES, "%s", genkeyf);
                if (do_fsync && fsync(krfd) == -1) xerror(NO, NO, YES, "%s", genkeyf);
                if (verbose && xtskeyset == NO) {
@@ -1022,12 +1050,10 @@ _xts2genkey:    if (xwrite(krfd, pblk, TF_FROM_BITS(TFC_KEY_BITS)) == NOSIZE) xerro
 
        if (do_mac != NO) {
                if (mackey_opt == TFC_MACKEY_RAWKEY) skein(mackey, TF_MAX_BITS, key, key, TF_FROM_BITS(TFC_KEY_BITS));
-               if (ctr_mode < TFC_MODE_OCB) {
-                       if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
-                               "will be slower.", tfc_format_pid(progname));
-                       if (mackey_opt) skein_init_key(&sk, mackey, macbits);
-                       else skein_init(&sk, macbits);
-               }
+               if (verbose) tfc_esay("%s: doing MAC calculation, processing speed "
+                       "will be slower.", tfc_format_pid(progname));
+               if (mackey_opt) skein_init_key(&sk, mackey, macbits);
+               else skein_init(&sk, macbits);
        }
 
        if (!counter_file && counter_opt <= TFC_CTR_SHOW && ctr_mode != TFC_MODE_ECB) {
@@ -1069,11 +1095,8 @@ _ctrskip2:
 _plain:
        if (argv[idx]) {
                if (!strcmp(argv[idx], "-")) dfd = 1;
-               else dfd = open(argv[idx], O_RDWR | O_LARGEFILE | write_flags, 0666);
-               if (dfd == -1) {
-                       dfd = open(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
-                       if (dfd == -1) xerror(NO, NO, YES, "%s", argv[idx]);
-               }
+               else dfd = xxopen(YES, argv[idx], O_RDWR | O_LARGEFILE | write_flags);
+               if (dfd == -1) dfd = xopen(argv[idx], O_WRONLY | O_CREAT | O_LARGEFILE | write_flags);
                dstfname = argv[idx];
                idx++;
        }
@@ -1200,8 +1223,7 @@ _ragain:  lio = xread(sfd, pblk, lrem);
                        memset(srcblk+orig, 0, sizeof(srcblk)-orig);
                }
 
-               if (do_mac == TFC_MAC_SIGN && ctr_mode < TFC_MODE_OCB)
-                       skein_update(&sk, srcblk, ldone);
+               if (do_mac == TFC_MAC_SIGN) skein_update(&sk, srcblk, ldone);
 
                if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, dstblk, srcblk, ldone);
                else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, dstblk, srcblk, ldone);
@@ -1218,16 +1240,10 @@ _ragain:        lio = xread(sfd, pblk, lrem);
                else if (ctr_mode == TFC_MODE_CBC && do_edcrypt == TFC_DO_DECRYPT)
                        tf_cbc_decrypt(key, ctr, dstblk, srcblk, ldone);
 
-               else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_ENCRYPT)
-                       tf_ocb_encrypt(key, ctr, dstblk, do_mac == TFC_MAC_SIGN ? macresult : NULL, srcblk, ldone, xtsblocks);
-               else if (ctr_mode == TFC_MODE_OCB && do_edcrypt == TFC_DO_DECRYPT)
-                       tf_ocb_decrypt(key, ctr, dstblk, do_mac >= TFC_MAC_VRFY ? macresult : NULL, srcblk, ldone, xtsblocks);
-
                else if (ctr_mode == TFC_MODE_PLAIN)
                        memcpy(dstblk, srcblk, ldone);
 
-               if (do_mac >= TFC_MAC_VRFY && ctr_mode < TFC_MODE_OCB)
-                       skein_update(&sk, dstblk, ldone);
+               if (do_mac >= TFC_MAC_VRFY) skein_update(&sk, dstblk, ldone);
                if (do_mac >= TFC_MAC_JUST_VRFY) goto _nowrite;
 
                pblk = dstblk;
@@ -1290,8 +1306,7 @@ _macragain:               lio = xread(sfd, pblk, lrem);
                        int mfd;
 
                        if (!strcmp(do_mac_file, "-")) mfd = 0;
-                       else mfd = open(do_mac_file, O_RDONLY | O_LARGEFILE);
-                       if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
+                       else mfd = xopen(do_mac_file, O_RDONLY | O_LARGEFILE);
                        lio = ldone = xread(mfd, tmpdata, sizeof(tmpdata));
                        if (lio == NOSIZE) xerror(NO, NO, YES, "%s", do_mac_file);
                        if (!memcmp(tmpdata, TFC_ASCII_TFC_MAC_FOURCC, TFC_ASCII_TFC_MAC_FOURCC_LEN)) {
@@ -1311,15 +1326,13 @@ _macragain:             lio = xread(sfd, pblk, lrem);
                        goto _shortmac;
                }
 
-               if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
-               else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
+               skein_final(macresult, &sk);
 
                if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
                else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macvrfy, TF_FROM_BITS(macbits));
                else if (ctr_mode == TFC_MODE_XTS) tf_xts_decrypt(key, xtskey, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
                else if (ctr_mode == TFC_MODE_ECB) tf_ecb_decrypt(key, tmpdata, macvrfy, TF_FROM_BITS(macbits));
                else if (ctr_mode == TFC_MODE_CBC) tf_cbc_decrypt(key, ctr, tmpdata, macvrfy, TF_FROM_BITS(macbits));
-               else if (ctr_mode == TFC_MODE_OCB) tf_ocb_decrypt(key, ctr, tmpdata, NULL, macvrfy, TF_FROM_BITS(macbits), xtsblocks);
 
                if (!memcmp(tmpdata, macresult, TF_FROM_BITS(macbits))) {
                        if (quiet == NO) {
@@ -1350,15 +1363,13 @@ _shortmac:      memset(macvrfy, 0, sizeof(macvrfy));
                memset(tmpdata, 0, sizeof(tmpdata));
        }
        else if (do_mac == TFC_MAC_SIGN) {
-               if (ctr_mode < TFC_MODE_OCB) skein_final(macresult, &sk);
-               else skein(macresult, macbits, mackey, macresult, TF_FROM_BITS(macbits));
+               skein_final(macresult, &sk);
 
                if (ctr_mode == TFC_MODE_CTR) tf_ctr_crypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
                else if (ctr_mode == TFC_MODE_STREAM) tf_stream_crypt(&tfe, tmpdata, macresult, TF_FROM_BITS(macbits));
                else if (ctr_mode == TFC_MODE_XTS) tf_xts_encrypt(key, xtskey, ctr, tmpdata, macresult, TF_FROM_BITS(macbits), xtsblocks);
                else if (ctr_mode == TFC_MODE_ECB) tf_ecb_encrypt(key, tmpdata, macresult, TF_FROM_BITS(macbits));
                else if (ctr_mode == TFC_MODE_CBC) tf_cbc_encrypt(key, ctr, tmpdata, macresult, TF_FROM_BITS(macbits));
-               else if (ctr_mode == TFC_MODE_OCB) tf_ocb_encrypt(key, ctr, tmpdata, NULL, macresult, TF_FROM_BITS(macbits), xtsblocks);
                memset(macresult, 0, sizeof(macresult));
 
                if (!do_mac_file) {
@@ -1382,8 +1393,7 @@ _macwagain:               lio = xwrite(dfd, pblk, lrem);
                        int mfd;
 
                        if (!strcmp(do_mac_file, "-")) mfd = 1;
-                       else mfd = open(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags, 0666);
-                       if (mfd == -1) xerror(YES, NO, NO, "%s", do_mac_file);
+                       else mfd = xopen(do_mac_file, O_WRONLY | O_CREAT | O_LARGEFILE | write_flags);
                        if (do_outfmt == TFC_OUTFMT_B64) {
                                memcpy(macvrfy, tmpdata, TF_FROM_BITS(macbits));
                                memset(tmpdata, 0, TFC_TMPSIZE);