move read_base64 to libbb/uuencode.c

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>

libbb/base64.c

@@ -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) */
-}

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) */
+}

mailutils/mail.c

@@ -116,16 +116,15 @@ void FAST_FUNC encode_base64(char *fname, const char *text, const char *eol)
 		SRC_BUF_SIZE = 45,  /* This *MUST* be a multiple of 3 */
 		DST_BUF_SIZE = 4 * ((SRC_BUF_SIZE + 2) / 3),
 	};
-
 #define src_buf text
+	char src[SRC_BUF_SIZE];
 	FILE *fp = fp;
 	ssize_t len = len;
 	char dst_buf[DST_BUF_SIZE + 1];
 
 	if (fname) {
 		fp = (NOT_LONE_DASH(fname)) ? xfopen_for_read(fname) : (FILE *)text;
-		src_buf = bb_common_bufsiz1;
+		src_buf = src;
-	// N.B. strlen(NULL) segfaults!
 	} else if (text) {
 		// though we do not call uuencode(NULL, NULL) explicitly
 		// still we do not want to break things suddenly