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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>
This commit is contained in:
Tudor-Dan Ambarus 2017-05-30 17:52:49 +03:00 committed by Herbert Xu
parent 6755fd269d
commit 47d3fd390e
2 changed files with 112 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

64
crypto/testmgr.c
View File

@ -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;
@ -2026,21 +2029,32 @@ 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;
}
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: generate public key test failed. Invalid output\n",
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. */
input_buf = kzalloc(vec->b_public_size, GFP_KERNEL);
@ -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);

47
crypto/testmgr.h
View File

@ -137,13 +137,16 @@ struct akcipher_testvec {
struct kpp_testvec {
const unsigned char *secret;
const unsigned char *b_secret;
const unsigned char *b_public;
const unsigned char *expected_a_public;
const unsigned char *expected_ss;
unsigned short secret_size;
unsigned short b_secret_size;
unsigned short b_public_size;
unsigned short expected_a_public_size;
unsigned short expected_ss_size;
bool genkey;
};
static const char zeroed_string[48];
@ -840,6 +843,50 @@ static const struct kpp_testvec ecdh_tv_template[] = {
.b_public_size = 64,
.expected_a_public_size = 64,
.expected_ss_size = 32
}, {
.secret =
#ifdef __LITTLE_ENDIAN
"\x02\x00" /* type */
"\x08\x00" /* len */
"\x02\x00" /* curve_id */
"\x00\x00", /* key_size */
#else
"\x00\x02" /* type */
"\x00\x08" /* len */
"\x00\x02" /* curve_id */
"\x00\x00", /* key_size */
#endif
.b_secret =
#ifdef __LITTLE_ENDIAN
"\x02\x00" /* type */
"\x28\x00" /* len */
"\x02\x00" /* curve_id */
"\x20\x00" /* key_size */
#else
"\x00\x02" /* type */
"\x00\x28" /* len */
"\x00\x02" /* curve_id */
"\x00\x20" /* key_size */
#endif
"\x24\xd1\x21\xeb\xe5\xcf\x2d\x83"
"\xf6\x62\x1b\x6e\x43\x84\x3a\xa3"
"\x8b\xe0\x86\xc3\x20\x19\xda\x92"
"\x50\x53\x03\xe1\xc0\xea\xb8\x82",
.b_public =
"\x1a\x7f\xeb\x52\x00\xbd\x3c\x31"
"\x7d\xb6\x70\xc1\x86\xa6\xc7\xc4"
"\x3b\xc5\x5f\x6c\x6f\x58\x3c\xf5"
"\xb6\x63\x82\x77\x33\x24\xa1\x5f"
"\x6a\xca\x43\x6f\xf7\x7e\xff\x02"
"\x37\x08\xcc\x40\x5e\x7a\xfd\x6a"
"\x6a\x02\x6e\x41\x87\x68\x38\x77"
"\xfa\xa9\x44\x43\x2d\xef\x09\xdf",
.secret_size = 8,
.b_secret_size = 40,
.b_public_size = 64,
.expected_a_public_size = 64,
.expected_ss_size = 32,
.genkey = true,
}
};