/* vi: set sw=4 ts=4: */ /* * Copyright (C) 2000 by Glenn McGrath * * based on the function base64_encode from http.c in wget v1.6 * Copyright (C) 1995, 1996, 1997, 1998, 2000 Free Software Foundation, Inc. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Library General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <stdio.h> #include <string.h> #include <stdlib.h> #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include "busybox.h" /* Conversion table. for base 64 */ static const char tbl_base64[65] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/', '=' /* termination character */ }; static const char tbl_std[65] = { '`', '!', '"', '#', '$', '%', '&', '\'', '(', ')', '*', '+', ',', '-', '.', '/', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?', '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '[', '\\', ']', '^', '_', '`' /* termination character */ }; /* * Encode the string S of length LENGTH to base64 format and place it * to STORE. STORE will be 0-terminated, and must point to a writable * buffer of at least 1+BASE64_LENGTH(length) bytes. * where BASE64_LENGTH(len) = (4 * ((LENGTH + 2) / 3)) */ static void uuencode (const unsigned char *s, const char *store, const int length, const char *tbl) { int i; unsigned char *p = (unsigned char *)store; /* Transform the 3x8 bits to 4x6 bits, as required by base64. */ for (i = 0; i < length; i += 3) { *p++ = tbl[s[0] >> 2]; *p++ = tbl[((s[0] & 3) << 4) + (s[1] >> 4)]; *p++ = tbl[((s[1] & 0xf) << 2) + (s[2] >> 6)]; *p++ = tbl[s[2] & 0x3f]; s += 3; } /* Pad the result if necessary... */ if (i == length + 1) { *(p - 1) = tbl[64]; } else if (i == length + 2) { *(p - 1) = *(p - 2) = tbl[64]; } /* ...and zero-terminate it. */ *p = '\0'; } #define SRC_BUF_SIZE 45 // This *MUST* be a multiple of 3 #define DST_BUF_SIZE 4 * ((SRC_BUF_SIZE + 2) / 3) int uuencode_main(int argc, char **argv) { const int src_buf_size = SRC_BUF_SIZE; const int dst_buf_size = DST_BUF_SIZE; int write_size = dst_buf_size; struct stat stat_buf; FILE *src_stream = stdin; const char *tbl; size_t size; mode_t mode; RESERVE_CONFIG_BUFFER(src_buf, SRC_BUF_SIZE + 1); RESERVE_CONFIG_BUFFER(dst_buf, DST_BUF_SIZE + 1); tbl = tbl_std; if (bb_getopt_ulflags(argc, argv, "m") & 1) { tbl = tbl_base64; } switch (argc - optind) { case 2: src_stream = bb_xfopen(argv[optind], "r"); if (stat(argv[optind], &stat_buf) < 0) { bb_perror_msg_and_die("stat"); } mode = stat_buf.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO); if (src_stream == stdout) { puts("NULL"); } break; case 1: mode = 0666 & ~umask(0666); break; default: bb_show_usage(); } bb_printf("begin%s %o %s", tbl == tbl_std ? "" : "-base64", mode, argv[argc - 1]); while ((size = fread(src_buf, 1, src_buf_size, src_stream)) > 0) { if (size != src_buf_size) { /* write_size is always 60 until the last line */ write_size=(4 * ((size + 2) / 3)); /* pad with 0s so we can just encode extra bits */ memset(&src_buf[size], 0, src_buf_size - size); } /* Encode the buffer we just read in */ uuencode(src_buf, dst_buf, size, tbl); putchar('\n'); if (tbl == tbl_std) { putchar(tbl[size]); } if (fwrite(dst_buf, 1, write_size, stdout) != write_size) { bb_perror_msg_and_die(bb_msg_write_error); } } bb_printf(tbl == tbl_std ? "\n`\nend\n" : "\n====\n"); bb_xferror(src_stream, "source"); /* TODO - Fix this! */ bb_fflush_stdout_and_exit(EXIT_SUCCESS); }