SUNRPC: Add checksum KUnit tests for the RFC 6803 encryption types

Test the new-to-RPCSEC CMAC digest algorithm.

Tested-by: Scott Mayhew <smayhew@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>

diff --git a/net/sunrpc/auth_gss/gss_krb5_crypto.c b/net/sunrpc/auth_gss/gss_krb5_crypto.c
index 5d8dff65d014131845d0b88fb5d3f79817705c9f..c4e76a51203b51f8086e5e430d5eedf0e6b32134 100644 (file)
--- a/net/sunrpc/auth_gss/gss_krb5_crypto.c
+++ b/net/sunrpc/auth_gss/gss_krb5_crypto.c
@@ -361,6 +361,7 @@ out_free_cksum:
        kfree_sensitive(checksumdata);
        return err ? GSS_S_FAILURE : GSS_S_COMPLETE;
 }
+EXPORT_SYMBOL_IF_KUNIT(gss_krb5_checksum);
 
 struct encryptor_desc {
        u8 iv[GSS_KRB5_MAX_BLOCKSIZE];

diff --git a/net/sunrpc/auth_gss/gss_krb5_test.c b/net/sunrpc/auth_gss/gss_krb5_test.c
index c80a8f6588c0504742a691737efe0a6efc162856..ea8cba8c3eb37e68bc540fd3ef082c7baa254569 100644 (file)
--- a/net/sunrpc/auth_gss/gss_krb5_test.c
+++ b/net/sunrpc/auth_gss/gss_krb5_test.c
@@ -10,6 +10,7 @@
 #include <kunit/visibility.h>
 
 #include <linux/kernel.h>
+#include <crypto/hash.h>
 
 #include <linux/sunrpc/xdr.h>
 #include <linux/sunrpc/gss_krb5.h>
@@ -64,6 +65,52 @@ static void kdf_case(struct kunit *test)
                            "key mismatch");
 }
 
+static void checksum_case(struct kunit *test)
+{
+       const struct gss_krb5_test_param *param = test->param_value;
+       struct xdr_buf buf = {
+               .head[0].iov_base       = param->plaintext->data,
+               .head[0].iov_len        = param->plaintext->len,
+               .len                    = param->plaintext->len,
+       };
+       const struct gss_krb5_enctype *gk5e;
+       struct xdr_netobj Kc, checksum;
+       struct crypto_ahash *tfm;
+       int err;
+
+       /* Arrange */
+       gk5e = gss_krb5_lookup_enctype(param->enctype);
+       KUNIT_ASSERT_NOT_NULL(test, gk5e);
+
+       Kc.len = gk5e->Kc_length;
+       Kc.data = kunit_kzalloc(test, Kc.len, GFP_KERNEL);
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, Kc.data);
+       err = gk5e->derive_key(gk5e, param->base_key, &Kc,
+                              param->usage, GFP_KERNEL);
+       KUNIT_ASSERT_EQ(test, err, 0);
+
+       tfm = crypto_alloc_ahash(gk5e->cksum_name, 0, CRYPTO_ALG_ASYNC);
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, tfm);
+       err = crypto_ahash_setkey(tfm, Kc.data, Kc.len);
+       KUNIT_ASSERT_EQ(test, err, 0);
+
+       checksum.len = gk5e->cksumlength;
+       checksum.data = kunit_kzalloc(test, checksum.len, GFP_KERNEL);
+       KUNIT_ASSERT_NOT_ERR_OR_NULL(test, checksum.data);
+
+       /* Act */
+       err = gss_krb5_checksum(tfm, NULL, 0, &buf, 0, &checksum);
+       KUNIT_ASSERT_EQ(test, err, 0);
+
+       /* Assert */
+       KUNIT_EXPECT_EQ_MSG(test,
+                           memcmp(param->expected_result->data,
+                                  checksum.data, checksum.len), 0,
+                           "checksum mismatch");
+
+       crypto_free_ahash(tfm);
+}
+
 #define DEFINE_HEX_XDR_NETOBJ(name, hex_array...)              \
        static const u8 name ## _data[] = { hex_array };        \
        static const struct xdr_netobj name = {                 \
@@ -71,6 +118,13 @@ static void kdf_case(struct kunit *test)
                .len    = sizeof(name##_data),                  \
        }
 
+#define DEFINE_STR_XDR_NETOBJ(name, string)                    \
+       static const u8 name ## _str[] = string;                \
+       static const struct xdr_netobj name = {                 \
+               .data   = (u8 *)name##_str,                     \
+               .len    = sizeof(name##_str) - 1,               \
+       }
+
 /*
  * RFC 3961 Appendix A.1.  n-fold
  *
@@ -836,12 +890,126 @@ static const struct gss_krb5_test_param rfc6803_kdf_test_params[] = {
 /* Creates the function rfc6803_kdf_gen_params */
 KUNIT_ARRAY_PARAM(rfc6803_kdf, rfc6803_kdf_test_params, gss_krb5_get_desc);
 
+/*
+ * From RFC 6803 Section 10.  Test vectors
+ *
+ * Sample checksums.
+ *
+ * Copyright (c) 2012 IETF Trust and the persons identified as the
+ * document authors.  All rights reserved.
+ *
+ * XXX: These tests are likely to fail on EBCDIC or Unicode platforms.
+ */
+DEFINE_STR_XDR_NETOBJ(rfc6803_checksum_test1_plaintext,
+                     "abcdefghijk");
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test1_basekey,
+                     0x1d, 0xc4, 0x6a, 0x8d, 0x76, 0x3f, 0x4f, 0x93,
+                     0x74, 0x2b, 0xcb, 0xa3, 0x38, 0x75, 0x76, 0xc3
+);
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test1_usage,
+                     0x00, 0x00, 0x00, 0x07, KEY_USAGE_SEED_CHECKSUM
+);
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test1_expected_result,
+                     0x11, 0x78, 0xe6, 0xc5, 0xc4, 0x7a, 0x8c, 0x1a,
+                     0xe0, 0xc4, 0xb9, 0xc7, 0xd4, 0xeb, 0x7b, 0x6b
+);
+
+DEFINE_STR_XDR_NETOBJ(rfc6803_checksum_test2_plaintext,
+                     "ABCDEFGHIJKLMNOPQRSTUVWXYZ");
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test2_basekey,
+                     0x50, 0x27, 0xbc, 0x23, 0x1d, 0x0f, 0x3a, 0x9d,
+                     0x23, 0x33, 0x3f, 0x1c, 0xa6, 0xfd, 0xbe, 0x7c
+);
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test2_usage,
+                     0x00, 0x00, 0x00, 0x08, KEY_USAGE_SEED_CHECKSUM
+);
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test2_expected_result,
+                     0xd1, 0xb3, 0x4f, 0x70, 0x04, 0xa7, 0x31, 0xf2,
+                     0x3a, 0x0c, 0x00, 0xbf, 0x6c, 0x3f, 0x75, 0x3a
+);
+
+DEFINE_STR_XDR_NETOBJ(rfc6803_checksum_test3_plaintext,
+                     "123456789");
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test3_basekey,
+                     0xb6, 0x1c, 0x86, 0xcc, 0x4e, 0x5d, 0x27, 0x57,
+                     0x54, 0x5a, 0xd4, 0x23, 0x39, 0x9f, 0xb7, 0x03,
+                     0x1e, 0xca, 0xb9, 0x13, 0xcb, 0xb9, 0x00, 0xbd,
+                     0x7a, 0x3c, 0x6d, 0xd8, 0xbf, 0x92, 0x01, 0x5b
+);
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test3_usage,
+                     0x00, 0x00, 0x00, 0x09, KEY_USAGE_SEED_CHECKSUM
+);
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test3_expected_result,
+                     0x87, 0xa1, 0x2c, 0xfd, 0x2b, 0x96, 0x21, 0x48,
+                     0x10, 0xf0, 0x1c, 0x82, 0x6e, 0x77, 0x44, 0xb1
+);
+
+DEFINE_STR_XDR_NETOBJ(rfc6803_checksum_test4_plaintext,
+                     "!@#$%^&*()!@#$%^&*()!@#$%^&*()");
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test4_basekey,
+                     0x32, 0x16, 0x4c, 0x5b, 0x43, 0x4d, 0x1d, 0x15,
+                     0x38, 0xe4, 0xcf, 0xd9, 0xbe, 0x80, 0x40, 0xfe,
+                     0x8c, 0x4a, 0xc7, 0xac, 0xc4, 0xb9, 0x3d, 0x33,
+                     0x14, 0xd2, 0x13, 0x36, 0x68, 0x14, 0x7a, 0x05
+);
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test4_usage,
+                     0x00, 0x00, 0x00, 0x0a, KEY_USAGE_SEED_CHECKSUM
+);
+DEFINE_HEX_XDR_NETOBJ(rfc6803_checksum_test4_expected_result,
+                     0x3f, 0xa0, 0xb4, 0x23, 0x55, 0xe5, 0x2b, 0x18,
+                     0x91, 0x87, 0x29, 0x4a, 0xa2, 0x52, 0xab, 0x64
+);
+
+static const struct gss_krb5_test_param rfc6803_checksum_test_params[] = {
+       {
+               .desc                   = "camellia128-cts-cmac checksum test 1",
+               .enctype                = ENCTYPE_CAMELLIA128_CTS_CMAC,
+               .base_key               = &rfc6803_checksum_test1_basekey,
+               .usage                  = &rfc6803_checksum_test1_usage,
+               .plaintext              = &rfc6803_checksum_test1_plaintext,
+               .expected_result        = &rfc6803_checksum_test1_expected_result,
+       },
+       {
+               .desc                   = "camellia128-cts-cmac checksum test 2",
+               .enctype                = ENCTYPE_CAMELLIA128_CTS_CMAC,
+               .base_key               = &rfc6803_checksum_test2_basekey,
+               .usage                  = &rfc6803_checksum_test2_usage,
+               .plaintext              = &rfc6803_checksum_test2_plaintext,
+               .expected_result        = &rfc6803_checksum_test2_expected_result,
+       },
+       {
+               .desc                   = "camellia256-cts-cmac checksum test 3",
+               .enctype                = ENCTYPE_CAMELLIA256_CTS_CMAC,
+               .base_key               = &rfc6803_checksum_test3_basekey,
+               .usage                  = &rfc6803_checksum_test3_usage,
+               .plaintext              = &rfc6803_checksum_test3_plaintext,
+               .expected_result        = &rfc6803_checksum_test3_expected_result,
+       },
+       {
+               .desc                   = "camellia256-cts-cmac checksum test 4",
+               .enctype                = ENCTYPE_CAMELLIA256_CTS_CMAC,
+               .base_key               = &rfc6803_checksum_test4_basekey,
+               .usage                  = &rfc6803_checksum_test4_usage,
+               .plaintext              = &rfc6803_checksum_test4_plaintext,
+               .expected_result        = &rfc6803_checksum_test4_expected_result,
+       },
+};
+
+/* Creates the function rfc6803_checksum_gen_params */
+KUNIT_ARRAY_PARAM(rfc6803_checksum, rfc6803_checksum_test_params,
+                 gss_krb5_get_desc);
+
 static struct kunit_case rfc6803_test_cases[] = {
        {
                .name                   = "RFC 6803 key derivation",
                .run_case               = kdf_case,
                .generate_params        = rfc6803_kdf_gen_params,
        },
+       {
+               .name                   = "RFC 6803 checksum",
+               .run_case               = checksum_case,
+               .generate_params        = rfc6803_checksum_gen_params,
+       },
 };
 
 static struct kunit_suite rfc6803_suite = {