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authorTudor-Dan Ambarus <tudor.ambarus@microchip.com>2017-05-30 17:52:49 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2017-06-10 07:04:36 +0300
commit47d3fd390e899e0403da35733b75832eacfbbc3f (patch)
tree978c7091ffb0209330bb560fe5e5cf554ded03a9 /crypto/testmgr.c
parent6755fd269d5c100b0eca420db501ae58435efd6e (diff)
downloadlinux-47d3fd390e899e0403da35733b75832eacfbbc3f.tar.xz
crypto: testmgr - add genkey kpp test
The test considers a party that already has a private-public key pair and a party that provides a NULL key. The kernel will generate the private-public key pair for the latter, computes the shared secret on both ends and verifies if it's the same. The explicit private-public key pair was copied from the previous test vector. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/testmgr.c')
-rw-r--r--crypto/testmgr.c76
1 files changed, 65 insertions, 11 deletions
diff --git a/crypto/testmgr.c b/crypto/testmgr.c
index 6f5f3ed8376c..5f8e6838e5a8 100644
--- a/crypto/testmgr.c
+++ b/crypto/testmgr.c
@@ -1997,6 +1997,9 @@ static int do_test_kpp(struct crypto_kpp *tfm, const struct kpp_testvec *vec,
struct kpp_request *req;
void *input_buf = NULL;
void *output_buf = NULL;
+ void *a_public = NULL;
+ void *a_ss = NULL;
+ void *shared_secret = NULL;
struct tcrypt_result result;
unsigned int out_len_max;
int err = -ENOMEM;
@@ -2026,20 +2029,31 @@ static int do_test_kpp(struct crypto_kpp *tfm, const struct kpp_testvec *vec,
kpp_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
tcrypt_complete, &result);
- /* Compute public key */
+ /* Compute party A's public key */
err = wait_async_op(&result, crypto_kpp_generate_public_key(req));
if (err) {
- pr_err("alg: %s: generate public key test failed. err %d\n",
+ pr_err("alg: %s: Party A: generate public key test failed. err %d\n",
alg, err);
goto free_output;
}
- /* Verify calculated public key */
- if (memcmp(vec->expected_a_public, sg_virt(req->dst),
- vec->expected_a_public_size)) {
- pr_err("alg: %s: generate public key test failed. Invalid output\n",
- alg);
- err = -EINVAL;
- goto free_output;
+
+ if (vec->genkey) {
+ /* Save party A's public key */
+ a_public = kzalloc(out_len_max, GFP_KERNEL);
+ if (!a_public) {
+ err = -ENOMEM;
+ goto free_output;
+ }
+ memcpy(a_public, sg_virt(req->dst), out_len_max);
+ } else {
+ /* Verify calculated public key */
+ if (memcmp(vec->expected_a_public, sg_virt(req->dst),
+ vec->expected_a_public_size)) {
+ pr_err("alg: %s: Party A: generate public key test failed. Invalid output\n",
+ alg);
+ err = -EINVAL;
+ goto free_output;
+ }
}
/* Calculate shared secret key by using counter part (b) public key. */
@@ -2058,15 +2072,53 @@ static int do_test_kpp(struct crypto_kpp *tfm, const struct kpp_testvec *vec,
tcrypt_complete, &result);
err = wait_async_op(&result, crypto_kpp_compute_shared_secret(req));
if (err) {
- pr_err("alg: %s: compute shard secret test failed. err %d\n",
+ pr_err("alg: %s: Party A: compute shared secret test failed. err %d\n",
alg, err);
goto free_all;
}
+
+ if (vec->genkey) {
+ /* Save the shared secret obtained by party A */
+ a_ss = kzalloc(vec->expected_ss_size, GFP_KERNEL);
+ if (!a_ss) {
+ err = -ENOMEM;
+ goto free_all;
+ }
+ memcpy(a_ss, sg_virt(req->dst), vec->expected_ss_size);
+
+ /*
+ * Calculate party B's shared secret by using party A's
+ * public key.
+ */
+ err = crypto_kpp_set_secret(tfm, vec->b_secret,
+ vec->b_secret_size);
+ if (err < 0)
+ goto free_all;
+
+ sg_init_one(&src, a_public, vec->expected_a_public_size);
+ sg_init_one(&dst, output_buf, out_len_max);
+ kpp_request_set_input(req, &src, vec->expected_a_public_size);
+ kpp_request_set_output(req, &dst, out_len_max);
+ kpp_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG,
+ tcrypt_complete, &result);
+ err = wait_async_op(&result,
+ crypto_kpp_compute_shared_secret(req));
+ if (err) {
+ pr_err("alg: %s: Party B: compute shared secret failed. err %d\n",
+ alg, err);
+ goto free_all;
+ }
+
+ shared_secret = a_ss;
+ } else {
+ shared_secret = (void *)vec->expected_ss;
+ }
+
/*
* verify shared secret from which the user will derive
* secret key by executing whatever hash it has chosen
*/
- if (memcmp(vec->expected_ss, sg_virt(req->dst),
+ if (memcmp(shared_secret, sg_virt(req->dst),
vec->expected_ss_size)) {
pr_err("alg: %s: compute shared secret test failed. Invalid output\n",
alg);
@@ -2074,8 +2126,10 @@ static int do_test_kpp(struct crypto_kpp *tfm, const struct kpp_testvec *vec,
}
free_all:
+ kfree(a_ss);
kfree(input_buf);
free_output:
+ kfree(a_public);
kfree(output_buf);
free_req:
kpp_request_free(req);