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Fix handling of -offset and -length in asn1parse tool.

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If -offset exceeds -length of data available exit with an error.

Don't read past end of total data available when -offset supplied.

If -length exceeds total available truncate it.
This commit is contained in:
Dr. Stephen Henson
2004-02-08 13:30:33 +00:00
parent ad55502092
commit dd10343e75
1 changed files with 9 additions and 1 deletions
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10
apps/asn1pars.c
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@@ -304,7 +304,15 @@ bad:
num=tmplen; num=tmplen;
} }
if (length == 0) length=(unsigned int)num; if (offset >= num)
{
BIO_printf(bio_err, "Error: offset too large\n");
goto end;
}
num -= offset;
if ((length == 0) || (length > num)) length=(unsigned int)num;
if(derout) { if(derout) {
if(BIO_write(derout, str + offset, length) != (int)length) { if(BIO_write(derout, str + offset, length) != (int)length) {
BIO_printf(bio_err, "Error writing output\n"); BIO_printf(bio_err, "Error writing output\n");