SUNRPC: Remove krb5_derive_key_v1()

This function is no longer used.
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

net/sunrpc/auth_gss/gss_krb5_internal.h

@@ -104,12 +104,6 @@ u32 gss_krb5_unwrap_v2(struct krb5_ctx *kctx, int offset, int len,
 
 /* Key Derivation Functions */
 
-int krb5_derive_key_v1(const struct gss_krb5_enctype *gk5e,
-		       const struct xdr_netobj *inkey,
-		       struct xdr_netobj *outkey,
-		       const struct xdr_netobj *label,
-		       gfp_t gfp_mask);
-
 int krb5_derive_key_v2(const struct gss_krb5_enctype *gk5e,
 		       const struct xdr_netobj *inkey,
 		       struct xdr_netobj *outkey,

net/sunrpc/auth_gss/gss_krb5_keys.c

@@ -222,90 +222,6 @@ static int krb5_DK(const struct gss_krb5_enctype *gk5e,
 	return ret;
 }
 
-#define smask(step) ((1<<step)-1)
-#define pstep(x, step) (((x)&smask(step))^(((x)>>step)&smask(step)))
-#define parity_char(x) pstep(pstep(pstep((x), 4), 2), 1)
-
-static void mit_des_fixup_key_parity(u8 key[8])
-{
-	int i;
-	for (i = 0; i < 8; i++) {
-		key[i] &= 0xfe;
-		key[i] |= 1^parity_char(key[i]);
-	}
-}
-
-static int krb5_random_to_key_v1(const struct gss_krb5_enctype *gk5e,
-				 struct xdr_netobj *randombits,
-				 struct xdr_netobj *key)
-{
-	int i, ret = -EINVAL;
-
-	if (key->len != 24) {
-		dprintk("%s: key->len is %d\n", __func__, key->len);
-		goto err_out;
-	}
-	if (randombits->len != 21) {
-		dprintk("%s: randombits->len is %d\n",
-			__func__, randombits->len);
-		goto err_out;
-	}
-
-	/* take the seven bytes, move them around into the top 7 bits of the
-	   8 key bytes, then compute the parity bits.  Do this three times. */
-
-	for (i = 0; i < 3; i++) {
-		memcpy(key->data + i*8, randombits->data + i*7, 7);
-		key->data[i*8+7] = (((key->data[i*8]&1)<<1) |
-				    ((key->data[i*8+1]&1)<<2) |
-				    ((key->data[i*8+2]&1)<<3) |
-				    ((key->data[i*8+3]&1)<<4) |
-				    ((key->data[i*8+4]&1)<<5) |
-				    ((key->data[i*8+5]&1)<<6) |
-				    ((key->data[i*8+6]&1)<<7));
-
-		mit_des_fixup_key_parity(key->data + i*8);
-	}
-	ret = 0;
-err_out:
-	return ret;
-}
-
-/**
- * krb5_derive_key_v1 - Derive a subkey for an RFC 3961 enctype
- * @gk5e: Kerberos 5 enctype profile
- * @inkey: base protocol key
- * @outkey: OUT: derived key
- * @label: subkey usage label
- * @gfp_mask: memory allocation control flags
- *
- * Caller sets @outkey->len to the desired length of the derived key.
- *
- * On success, returns 0 and fills in @outkey. A negative errno value
- * is returned on failure.
- */
-int krb5_derive_key_v1(const struct gss_krb5_enctype *gk5e,
-		       const struct xdr_netobj *inkey,
-		       struct xdr_netobj *outkey,
-		       const struct xdr_netobj *label,
-		       gfp_t gfp_mask)
-{
-	struct xdr_netobj inblock;
-	int ret;
-
-	inblock.len = gk5e->keybytes;
-	inblock.data = kmalloc(inblock.len, gfp_mask);
-	if (!inblock.data)
-		return -ENOMEM;
-
-	ret = krb5_DK(gk5e, inkey, inblock.data, label, gfp_mask);
-	if (!ret)
-		ret = krb5_random_to_key_v1(gk5e, &inblock, outkey);
-
-	kfree_sensitive(inblock.data);
-	return ret;
-}
-
 /*
  * This is the identity function, with some sanity checking.
  */