(decode_coding_iso2022): More strict check for handling single

shifting.

(decode_coding_iso2022): More strict check for handling single
shifting.
e7046a18 · Kenichi Handa · 99bb2c60 · e7046a18
Commit e7046a18 authored Aug 04, 2000 by Kenichi Handa
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src/coding.c src/coding.c +4 -0

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--- a/src/coding.c
+++ b/src/coding.c
@@ -1471,6 +1471,8 @@ decode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes)
 		goto label_invalid_code;
 	      charset = CODING_SPEC_ISO_DESIGNATION (coding, 2);
 	      ONE_MORE_BYTE (c1);
+	      if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0))
+		goto label_invalid_code;
 	      break;

 	    case 'O':		/* invocation of single-shift-3 */
@@ -1479,6 +1481,8 @@ decode_coding_iso2022 (coding, source, destination, src_bytes, dst_bytes)
 		goto label_invalid_code;
 	      charset = CODING_SPEC_ISO_DESIGNATION (coding, 3);
 	      ONE_MORE_BYTE (c1);
+	      if (c1 < 0x20 || (c1 >= 0x80 && c1 < 0xA0))
+		goto label_invalid_code;
 	      break;

 	    case '0': case '2':	case '3': case '4': /* start composition */