SUNRPC: Remove gss_import_v1_context()

We no longer support importing v1 contexts.
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

net/sunrpc/auth_gss/gss_krb5_mech.c

@@ -273,143 +273,6 @@ const struct gss_krb5_enctype *gss_krb5_lookup_enctype(u32 etype)
 }
 EXPORT_SYMBOL_IF_KUNIT(gss_krb5_lookup_enctype);
 
-static struct crypto_sync_skcipher *
-gss_krb5_alloc_cipher_v1(struct krb5_ctx *ctx, struct xdr_netobj *key)
-{
-	struct crypto_sync_skcipher *tfm;
-
-	tfm = crypto_alloc_sync_skcipher(ctx->gk5e->encrypt_name, 0, 0);
-	if (IS_ERR(tfm))
-		return NULL;
-	if (crypto_sync_skcipher_setkey(tfm, key->data, key->len)) {
-		crypto_free_sync_skcipher(tfm);
-		return NULL;
-	}
-	return tfm;
-}
-
-static inline const void *
-get_key(const void *p, const void *end,
-	struct krb5_ctx *ctx, struct crypto_sync_skcipher **res)
-{
-	struct crypto_sync_skcipher *tfm;
-	struct xdr_netobj	key;
-	int			alg;
-
-	p = simple_get_bytes(p, end, &alg, sizeof(alg));
-	if (IS_ERR(p))
-		goto out_err;
-	switch (alg) {
-	case ENCTYPE_DES_CBC_CRC:
-	case ENCTYPE_DES_CBC_MD4:
-	case ENCTYPE_DES_CBC_MD5:
-		/* Map all these key types to ENCTYPE_DES_CBC_RAW */
-		alg = ENCTYPE_DES_CBC_RAW;
-		break;
-	}
-	if (!gss_krb5_lookup_enctype(alg)) {
-		pr_warn("gss_krb5: unsupported enctype: %d\n", alg);
-		goto out_err_inval;
-	}
-
-	p = simple_get_netobj(p, end, &key);
-	if (IS_ERR(p))
-		goto out_err;
-	tfm = gss_krb5_alloc_cipher_v1(ctx, &key);
-	kfree(key.data);
-	if (!tfm) {
-		pr_warn("gss_krb5: failed to initialize cipher '%s'\n",
-			ctx->gk5e->encrypt_name);
-		goto out_err_inval;
-	}
-	*res = tfm;
-
-	return p;
-
-out_err_inval:
-	p = ERR_PTR(-EINVAL);
-out_err:
-	return p;
-}
-
-static int
-gss_import_v1_context(const void *p, const void *end, struct krb5_ctx *ctx)
-{
-	u32 seq_send;
-	int tmp;
-	u32 time32;
-
-	p = simple_get_bytes(p, end, &ctx->initiate, sizeof(ctx->initiate));
-	if (IS_ERR(p))
-		goto out_err;
-
-	/* Old format supports only DES!  Any other enctype uses new format */
-	ctx->enctype = ENCTYPE_DES_CBC_RAW;
-
-	ctx->gk5e = gss_krb5_lookup_enctype(ctx->enctype);
-	if (ctx->gk5e == NULL) {
-		p = ERR_PTR(-EINVAL);
-		goto out_err;
-	}
-
-	/* The downcall format was designed before we completely understood
-	 * the uses of the context fields; so it includes some stuff we
-	 * just give some minimal sanity-checking, and some we ignore
-	 * completely (like the next twenty bytes): */
-	if (unlikely(p + 20 > end || p + 20 < p)) {
-		p = ERR_PTR(-EFAULT);
-		goto out_err;
-	}
-	p += 20;
-	p = simple_get_bytes(p, end, &tmp, sizeof(tmp));
-	if (IS_ERR(p))
-		goto out_err;
-	if (tmp != SGN_ALG_DES_MAC_MD5) {
-		p = ERR_PTR(-ENOSYS);
-		goto out_err;
-	}
-	p = simple_get_bytes(p, end, &tmp, sizeof(tmp));
-	if (IS_ERR(p))
-		goto out_err;
-	if (tmp != SEAL_ALG_DES) {
-		p = ERR_PTR(-ENOSYS);
-		goto out_err;
-	}
-	p = simple_get_bytes(p, end, &time32, sizeof(time32));
-	if (IS_ERR(p))
-		goto out_err;
-	/* unsigned 32-bit time overflows in year 2106 */
-	ctx->endtime = (time64_t)time32;
-	p = simple_get_bytes(p, end, &seq_send, sizeof(seq_send));
-	if (IS_ERR(p))
-		goto out_err;
-	atomic_set(&ctx->seq_send, seq_send);
-	p = simple_get_netobj(p, end, &ctx->mech_used);
-	if (IS_ERR(p))
-		goto out_err;
-	p = get_key(p, end, ctx, &ctx->enc);
-	if (IS_ERR(p))
-		goto out_err_free_mech;
-	p = get_key(p, end, ctx, &ctx->seq);
-	if (IS_ERR(p))
-		goto out_err_free_key1;
-	if (p != end) {
-		p = ERR_PTR(-EFAULT);
-		goto out_err_free_key2;
-	}
-
-	return 0;
-
-out_err_free_key2:
-	crypto_free_sync_skcipher(ctx->seq);
-out_err_free_key1:
-	crypto_free_sync_skcipher(ctx->enc);
-out_err_free_mech:
-	kfree(ctx->mech_used.data);
-out_err:
-	return PTR_ERR(p);
-}
-
 #if defined(CONFIG_RPCSEC_GSS_KRB5_CRYPTOSYSTEM)
 
 static struct crypto_sync_skcipher *
@@ -622,10 +485,7 @@ gss_krb5_import_sec_context(const void *p, size_t len, struct gss_ctx *ctx_id,
 	if (ctx == NULL)
 		return -ENOMEM;
 
-	if (len == 85)
-		ret = gss_import_v1_context(p, end, ctx);
-	else
-		ret = gss_import_v2_context(p, end, ctx, gfp_mask);
+	ret = gss_import_v2_context(p, end, ctx, gfp_mask);
 	memzero_explicit(&ctx->Ksess, sizeof(ctx->Ksess));
 	if (ret) {
 		kfree(ctx);