diff options
Diffstat (limited to 'coreutils/uudecode.c')
| -rw-r--r-- | coreutils/uudecode.c | 118 |
1 files changed, 108 insertions, 10 deletions
diff --git a/coreutils/uudecode.c b/coreutils/uudecode.c index 5b2edd6..e4fb0d4 100644 --- a/coreutils/uudecode.c +++ b/coreutils/uudecode.c @@ -168,9 +168,11 @@ int uudecode_main(int argc UNUSED_PARAM, char **argv) } #endif -//applet:IF_BASE64(APPLET(base64, BB_DIR_BIN, BB_SUID_DROP)) - -//kbuild:lib-$(CONFIG_BASE64) += uudecode.o +//config:config BASE32 +//config: bool "base32 (4.9 kb)" +//config: default y +//config: help +//config: Base32 encode and decode //config:config BASE64 //config: bool "base64 (4.9 kb)" @@ -178,6 +180,14 @@ int uudecode_main(int argc UNUSED_PARAM, char **argv) //config: help //config: Base64 encode and decode +//usage:#define base32_trivial_usage +//usage: "[-d] [FILE]" +//usage:#define base32_full_usage "\n\n" +//usage: "Base32 encode or decode FILE to standard output" +//usage: "\n -d Decode data" +////usage: "\n -w COL Wrap lines at COL (default 76, 0 disables)" +////usage: "\n -i When decoding, ignore non-alphabet characters" + //usage:#define base64_trivial_usage //usage: "[-d] [FILE]" //usage:#define base64_full_usage "\n\n" @@ -186,9 +196,77 @@ int uudecode_main(int argc UNUSED_PARAM, char **argv) ////usage: "\n -w COL Wrap lines at COL (default 76, 0 disables)" ////usage: "\n -i When decoding, ignore non-alphabet characters" -#if ENABLE_BASE64 -int base64_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int base64_main(int argc UNUSED_PARAM, char **argv) +// APPLET_ODDNAME:name main location suid_type help +//applet:IF_BASE32(APPLET_ODDNAME(base32, baseNUM, BB_DIR_BIN, BB_SUID_DROP, base32)) +//applet:IF_BASE64(APPLET_ODDNAME(base64, baseNUM, BB_DIR_BIN, BB_SUID_DROP, base64)) + +//kbuild:lib-$(CONFIG_BASE64) += uudecode.o +//kbuild:lib-$(CONFIG_BASE32) += uudecode.o + +#if ENABLE_BASE32 || ENABLE_BASE64 + +# if ENABLE_BASE32 +static void bb_b32encode(char *p, const void *src, int length) +{ +#define tbl bb_uuenc_tbl_base32 + const unsigned char *s = src; + + /* Transform 5x8 bits to 8x5 bits */ + while (length > 0) { + unsigned cur, next; + + length--; + cur = *s++; + *p++ = tbl[cur >> 3]; // xxxxx--- -------- -------- -------- -------- + cur &= 7; + + next = 0; + if (--length >= 0) + next = *s++; + *p++ = tbl[(cur << 2) + (next >> 6)]; // -----xxx xx------ -------- -------- -------- + cur = next & 0x3f; + + *p++ = tbl[cur >> 1]; // -------- --xxxxx- -------- -------- -------- + cur &= 1; + + next = 0; + if (--length >= 0) + next = *s++; + *p++ = tbl[(cur << 4) + (next >> 4)]; // -------- -------x xxxx---- -------- -------- + cur = next & 0xf; + + next = 0; + if (--length >= 0) + next = *s++; + *p++ = tbl[(cur << 1) + (next >> 7)]; // -------- -------- ----xxxx x------- -------- + cur = next & 0x7f; + + *p++ = tbl[cur >> 2]; // -------- -------- -------- -xxxxx-- -------- + cur &= 3; + + next = 0; + if (--length >= 0) + next = *s++; + *p++ = tbl[(cur << 3) + (next >> 5)]; // -------- -------- -------- ------xx xxx----- + cur = next & 0x1f; + + *p++ = tbl[cur]; // -------- -------- -------- -------- ---xxxxx + } +#undef tbl + /* Zero-terminate */ + *p = '\0'; + /* Pad as necessary */ + length = ((-length) * 3) >> 1; /* -4 => 6 pad chars, -3 => 4, -2 => 3, -1 => 1 */ + while (length--) { + *--p = '='; + } +} +# else +void bb_b32encode(char *p, const void *src, int length); /* undefined */ +# endif + +int baseNUM_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; +int baseNUM_main(int argc UNUSED_PARAM, char **argv) { FILE *src_stream; unsigned opts; @@ -200,7 +278,10 @@ int base64_main(int argc UNUSED_PARAM, char **argv) *--argv = (char*)"-"; src_stream = xfopen_stdin(argv[0]); if (opts) { - read_base64(src_stream, stdout, /*flags:*/ (unsigned char)EOF); + int flags = (unsigned char)EOF; + if (ENABLE_BASE32 && (!ENABLE_BASE64 || applet_name[4] == '3')) + flags = ((unsigned char)EOF) | BASE64_32; + read_base64(src_stream, stdout, flags); } else { enum { SRC_BUF_SIZE = 76 / 4 * 3, /* this *MUST* be a multiple of 3 */ @@ -210,14 +291,31 @@ int base64_main(int argc UNUSED_PARAM, char **argv) char dst_buf[DST_BUF_SIZE + 1]; int src_fd = fileno(src_stream); while (1) { - size_t size = full_read(src_fd, src_buf, SRC_BUF_SIZE); + size_t size; + if (ENABLE_BASE32 && (!ENABLE_BASE64 || applet_name[4] == '3')) + size = 72 / 8 * 5; +//FIXME: wrong, default width of base32 is not 72, but 76 chars +//(not a multiple of 8 - requires adding wrapping logic) +//when this is fixed, can implement -w COL too + else + size = SRC_BUF_SIZE; + + size = full_read(src_fd, src_buf, size); if (!size) break; if ((ssize_t)size < 0) bb_simple_perror_msg_and_die(bb_msg_read_error); + /* Encode the buffer we just read in */ - bb_uuencode(dst_buf, src_buf, size, bb_uuenc_tbl_base64); - xwrite(STDOUT_FILENO, dst_buf, 4 * ((size + 2) / 3)); + if (ENABLE_BASE32 && (!ENABLE_BASE64 || applet_name[4] == '3')) { + bb_b32encode(dst_buf, src_buf, size); + size = 8 * ((size + 4) / 5); + } else { + bb_uuencode(dst_buf, src_buf, size, bb_uuenc_tbl_base64); + size = 4 * ((size + 2) / 3); + } + + xwrite(STDOUT_FILENO, dst_buf, size); bb_putchar('\n'); fflush(stdout); } |