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Annotation of src/usr.bin/ssh/uuencode.c, Revision 1.28

1.28    ! deraadt     1: /* $OpenBSD: uuencode.c,v 1.27 2013/05/17 00:13:14 djm Exp $ */
1.1       markus      2: /*
1.4       markus      3:  * Copyright (c) 2000 Markus Friedl.  All rights reserved.
1.7       deraadt     4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  *
                     14:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
                     15:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
                     16:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
                     17:  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
                     18:  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
                     19:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
                     20:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
                     21:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
                     22:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
                     23:  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.1       markus     24:  */
1.7       deraadt    25:
1.22      stevesk    26: #include <sys/types.h>
                     27: #include <netinet/in.h>
                     28: #include <resolv.h>
1.23      stevesk    29: #include <stdio.h>
1.27      djm        30: #include <stdlib.h>
1.22      stevesk    31:
1.1       markus     32: #include "xmalloc.h"
1.10      itojun     33: #include "uuencode.h"
1.6       djm        34:
1.25      djm        35: /*
                     36:  * Encode binary 'src' of length 'srclength', writing base64-encoded text
                     37:  * to 'target' of size 'targsize'. Will always nul-terminate 'target'.
                     38:  * Returns the number of bytes stored in 'target' or -1 on error (inc.
                     39:  * 'targsize' too small).
                     40:  */
1.1       markus     41: int
1.17      jakob      42: uuencode(const u_char *src, u_int srclength,
1.4       markus     43:     char *target, size_t targsize)
1.1       markus     44: {
1.5       markus     45:        return __b64_ntop(src, srclength, target, targsize);
1.1       markus     46: }
                     47:
1.25      djm        48: /*
                     49:  * Decode base64-encoded 'src' into buffer 'target' of 'targsize' bytes.
                     50:  * Will skip leading and trailing whitespace. Returns the number of bytes
                     51:  * stored in 'target' or -1 on error (inc. targsize too small).
                     52:  */
1.1       markus     53: int
1.8       markus     54: uudecode(const char *src, u_char *target, size_t targsize)
1.1       markus     55: {
1.5       markus     56:        int len;
                     57:        char *encoded, *p;
                     58:
                     59:        /* copy the 'readonly' source */
                     60:        encoded = xstrdup(src);
                     61:        /* skip whitespace and data */
                     62:        for (p = encoded; *p == ' ' || *p == '\t'; p++)
                     63:                ;
                     64:        for (; *p != '\0' && *p != ' ' && *p != '\t'; p++)
                     65:                ;
1.13      markus     66:        /* and remove trailing whitespace because __b64_pton needs this */
1.5       markus     67:        *p = '\0';
                     68:        len = __b64_pton(encoded, target, targsize);
1.27      djm        69:        free(encoded);
1.5       markus     70:        return len;
1.1       markus     71: }
                     72:
                     73: void
1.26      djm        74: dump_base64(FILE *fp, const u_char *data, u_int len)
1.1       markus     75: {
1.21      deraadt    76:        char *buf;
1.1       markus     77:        int i, n;
1.9       deraadt    78:
1.19      djm        79:        if (len > 65536) {
                     80:                fprintf(fp, "dump_base64: len > 65536\n");
                     81:                return;
                     82:        }
1.28    ! deraadt    83:        buf = xreallocarray(NULL, 2, len);
1.4       markus     84:        n = uuencode(data, len, buf, 2*len);
1.1       markus     85:        for (i = 0; i < n; i++) {
                     86:                fprintf(fp, "%c", buf[i]);
                     87:                if (i % 70 == 69)
                     88:                        fprintf(fp, "\n");
                     89:        }
                     90:        if (i % 70 != 69)
                     91:                fprintf(fp, "\n");
1.27      djm        92:        free(buf);
1.1       markus     93: }