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(krb5_mk_error): realloc until you die

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@5104 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Assar Westerlund
1998-07-30 16:12:15 +00:00
parent f012712ae0
commit ae0bcd7f73
1 changed files with 41 additions and 6 deletions
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47
lib/krb5/mk_error.c
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@@ -51,8 +51,11 @@ krb5_mk_error(krb5_context context,
krb5_data *reply)
{
KRB_ERROR msg;
unsigned char buf[1024];
u_char *buf;
size_t buf_size;
int32_t sec, usec;
size_t len;
krb5_error_code ret = 0;
krb5_us_timeofday (context, &sec, &usec);
@@ -85,10 +88,42 @@ krb5_mk_error(krb5_context context,
msg.crealm = &client->realm;
msg.cname = &client->name;
}
encode_KRB_ERROR(buf + sizeof(buf) - 1, sizeof(buf), &msg, &reply->length);
reply->data = malloc(reply->length);
if (reply->data == NULL)
buf_size = 1024;
buf = malloc (buf_size);
if (buf == NULL)
return ENOMEM;
memcpy(reply->data, buf + sizeof(buf) - reply->length, reply->length);
return 0;
do {
ret = encode_KRB_ERROR(buf + buf_size - 1,
buf_size,
&msg,
&len);
if (ret) {
if (ret == ASN1_OVERFLOW) {
u_char *tmp;
buf_size *= 2;
tmp = realloc (buf, buf_size);
if (tmp == NULL) {
ret = ENOMEM;
goto out;
}
buf = tmp;
} else {
goto out;
}
}
} while (ret == ASN1_OVERFLOW);
reply->length = len;
reply->data = malloc(len);
if (reply->data == NULL) {
ret = ENOMEM;
goto out;
}
memcpy (reply->data, buf + buf_size - len, len);
out:
free (buf);
return ret;
}