| /* 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. |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this tarball for details. |
| */ |
| #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, char *store, const int length, const char *tbl) |
| { |
| int i; |
| char *p = 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 size_t src_buf_size = SRC_BUF_SIZE; |
| const size_t dst_buf_size = DST_BUF_SIZE; |
| size_t 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"); |
| xstat(argv[optind], &stat_buf); |
| 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((unsigned char*)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); |
| } |