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more stringent checking of the input paramters ...

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this one fixes one of my core dumps ...


git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@3487 57a11ea4-9604-0410-9ed3-97b8803252fd
This commit is contained in:
Linas Vepstas 2001-01-17 03:17:18 +00:00
parent 398fbb39a8
commit b3e8d2db73
1 changed files with 16 additions and 9 deletions
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25
src/engine/guid.c
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@ -394,18 +394,19 @@ decode_md5_string(const char *string, unsigned char *data)
size_t count;
char c1, c2;
if (string == NULL)
return FALSE;
if (NULL == data) return FALSE;
if (NULL == string) goto badstring;
for (count = 0; count < 16; count++)
{
/* check for a short string e.g. null string ... */
if ((0==string[2*count]) || (0==string[2*count+1])) goto badstring;
c1 = tolower(string[2 * count]);
if (!isxdigit(c1))
return FALSE;
if (!isxdigit(c1)) goto badstring;
c2 = tolower(string[2 * count + 1]);
if (!isxdigit(c2))
return FALSE;
if (!isxdigit(c2)) goto badstring;
if (isdigit(c1))
n1 = c1 - '0';
@ -417,11 +418,17 @@ decode_md5_string(const char *string, unsigned char *data)
else
n2 = c2 - 'a' + 10;
if (data != NULL)
data[count] = (n1 << 4) | n2;
data[count] = (n1 << 4) | n2;
}
return TRUE;
badstring:
for (count = 0; count < 16; count++)
{
data[count] = 0;
}
return FALSE;
}
char *