diff options
Diffstat (limited to 'libbb')
| -rw-r--r-- | libbb/base64.c | 78 | ||||
| -rw-r--r-- | libbb/uuencode.c | 76 |
2 files changed, 75 insertions, 79 deletions
diff --git a/libbb/base64.c b/libbb/base64.c deleted file mode 100644 index b9d47ae08..000000000 --- a/libbb/base64.c +++ /dev/null @@ -1,78 +0,0 @@ -/* vi: set sw=4 ts=4: */ -/* - * Utility routines. - * - * Copyright 2003, Glenn McGrath - * Copyright 2010, Denys Vlasenko - * - * Licensed under GPLv2 or later, see file LICENSE in this source tree. - */ -#include "libbb.h" - -//kbuild:lib-y += base64.o - -void FAST_FUNC read_base64(FILE *src_stream, FILE *dst_stream, int flags) -{ -/* Note that EOF _can_ be passed as exit_char too */ -#define exit_char ((int)(signed char)flags) -#define uu_style_end (flags & BASE64_FLAG_UUEND) - - int term_count = 0; - - while (1) { - unsigned char translated[4]; - int count = 0; - - /* Process one group of 4 chars */ - while (count < 4) { - char *table_ptr; - int ch; - - /* Get next _valid_ character. - * bb_uuenc_tbl_base64[] contains this string: - * 0 1 2 3 4 5 6 - * 012345678901234567890123456789012345678901234567890123456789012345 - * "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n" - */ - do { - ch = fgetc(src_stream); - if (ch == exit_char && count == 0) - return; - if (ch == EOF) - bb_error_msg_and_die("truncated base64 input"); - table_ptr = strchr(bb_uuenc_tbl_base64, ch); -//TODO: add BASE64_FLAG_foo to die on bad char? -//Note that then we may need to still allow '\r' (for mail processing) - } while (!table_ptr); - - /* Convert encoded character to decimal */ - ch = table_ptr - bb_uuenc_tbl_base64; - - if (ch == 65 /* '\n' */) { - /* Terminating "====" line? */ - if (uu_style_end && term_count == 4) - return; /* yes */ - continue; - } - /* ch is 64 if char was '=', otherwise 0..63 */ - translated[count] = ch & 63; /* 64 -> 0 */ - if (ch == 64) { - term_count++; - break; - } - term_count = 0; - count++; - } - - /* Merge 6 bit chars to 8 bit. - * count can be < 4 when we decode the tail: - * "eQ==" -> "y", not "y NUL NUL" - */ - if (count > 1) - fputc(translated[0] << 2 | translated[1] >> 4, dst_stream); - if (count > 2) - fputc(translated[1] << 4 | translated[2] >> 2, dst_stream); - if (count > 3) - fputc(translated[2] << 6 | translated[3], dst_stream); - } /* while (1) */ -} diff --git a/libbb/uuencode.c b/libbb/uuencode.c index 181f49de0..03e708fd5 100644 --- a/libbb/uuencode.c +++ b/libbb/uuencode.c @@ -1,6 +1,8 @@ /* vi: set sw=4 ts=4: */ /* - * Copyright 2006 Rob Landley <rob@landley.net> + * Copyright 2003, Glenn McGrath + * Copyright 2006, Rob Landley <rob@landley.net> + * Copyright 2010, Denys Vlasenko * * Licensed under GPLv2 or later, see file LICENSE in this source tree. */ @@ -69,3 +71,75 @@ void FAST_FUNC bb_uuencode(char *p, const void *src, int length, const char *tbl length++; } } + +/* + * Decode base64 encoded stream. + * Can stop on EOF, specified char, or on uuencode-style "====" line: + * flags argument controls it. + */ +void FAST_FUNC read_base64(FILE *src_stream, FILE *dst_stream, int flags) +{ +/* Note that EOF _can_ be passed as exit_char too */ +#define exit_char ((int)(signed char)flags) +#define uu_style_end (flags & BASE64_FLAG_UU_STOP) + + int term_count = 0; + + while (1) { + unsigned char translated[4]; + int count = 0; + + /* Process one group of 4 chars */ + while (count < 4) { + char *table_ptr; + int ch; + + /* Get next _valid_ character. + * bb_uuenc_tbl_base64[] contains this string: + * 0 1 2 3 4 5 6 + * 012345678901234567890123456789012345678901234567890123456789012345 + * "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n" + */ + do { + ch = fgetc(src_stream); + if (ch == exit_char && count == 0) + return; + if (ch == EOF) + bb_error_msg_and_die("truncated base64 input"); + table_ptr = strchr(bb_uuenc_tbl_base64, ch); +//TODO: add BASE64_FLAG_foo to die on bad char? +//Note that then we may need to still allow '\r' (for mail processing) + } while (!table_ptr); + + /* Convert encoded character to decimal */ + ch = table_ptr - bb_uuenc_tbl_base64; + + if (ch == 65 /* '\n' */) { + /* Terminating "====" line? */ + if (uu_style_end && term_count == 4) + return; /* yes */ + term_count = 0; + continue; + } + /* ch is 64 if char was '=', otherwise 0..63 */ + translated[count] = ch & 63; /* 64 -> 0 */ + if (ch == 64) { + term_count++; + break; + } + count++; + term_count = 0; + } + + /* Merge 6 bit chars to 8 bit. + * count can be < 4 when we decode the tail: + * "eQ==" -> "y", not "y NUL NUL" + */ + if (count > 1) + fputc(translated[0] << 2 | translated[1] >> 4, dst_stream); + if (count > 2) + fputc(translated[1] << 4 | translated[2] >> 2, dst_stream); + if (count > 3) + fputc(translated[2] << 6 | translated[3], dst_stream); + } /* while (1) */ +} |