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openssl/test/evp_pkey_dhkem_test.c
Matt Caswell da1c088f59 Copyright year updates 
Reviewed-by: Richard Levitte <levitte@openssl.org>
Release: yes
2023-09-07 09:59:15 +01:00

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/*
* Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/evp.h>
#include <openssl/core_names.h>
#include <openssl/param_build.h>
#include <openssl/proverr.h>
#include "internal/nelem.h"
#include "testutil.h"
#define TEST_KEM_ENCAP 0
#define TEST_KEM_DECAP 1
#define TEST_KEM_ENCAP_DECAP 2
#define TEST_TYPE_AUTH 0
#define TEST_TYPE_NOAUTH 1
#define TEST_TYPE_AUTH_NOAUTH 2
#define TEST_KEYTYPE_P256 0
#define TEST_KEYTYPE_X25519 1
#define TEST_KEYTYPES_P256_X25519 2
static OSSL_LIB_CTX *libctx = NULL;
static OSSL_PROVIDER *nullprov = NULL;
static OSSL_PROVIDER *libprov = NULL;
static OSSL_PARAM opparam[2];
static EVP_PKEY *rkey[TEST_KEYTYPES_P256_X25519] = { NULL, NULL };
static EVP_PKEY_CTX *rctx[TEST_KEYTYPES_P256_X25519] = { NULL, NULL };
#include "dhkem_test.inc"
/* Perform encapsulate KAT's */
static int test_dhkem_encapsulate(int tstid)
{
int ret = 0;
EVP_PKEY *rpub = NULL, *spriv = NULL;
const TEST_ENCAPDATA *t = &ec_encapdata[tstid];
TEST_note("Test %s %s Decapsulate", t->curve,
t->spriv != NULL ? "Auth" : "");
if (!TEST_ptr(rpub = new_raw_public_key(t->curve, t->rpub, t->rpublen)))
goto err;
if (t->spriv != NULL) {
if (!TEST_ptr(spriv = new_raw_private_key(t->curve,
t->spriv, t->sprivlen,
t->spub, t->spublen)))
goto err;
}
ret = do_encap(t, rpub, spriv);
err:
EVP_PKEY_free(spriv);
EVP_PKEY_free(rpub);
return ret;
}
/* Perform decapsulate KAT's */
static int test_dhkem_decapsulate(int tstid)
{
int ret = 0;
EVP_PKEY *rpriv = NULL, *spub = NULL;
const TEST_ENCAPDATA *t = &ec_encapdata[tstid];
TEST_note("Test %s %s Decapsulate", t->curve, t->spub != NULL ? "Auth" : "");
if (!TEST_ptr(rpriv = new_raw_private_key(t->curve, t->rpriv, t->rprivlen,
t->rpub, t->rpublen)))
goto err;
if (t->spub != NULL) {
if (!TEST_ptr(spub = new_raw_public_key(t->curve, t->spub, t->spublen)))
goto err;
}
ret = do_decap(t, rpriv, spub);
err:
EVP_PKEY_free(spub);
EVP_PKEY_free(rpriv);
return ret;
}
/* Test that there are settables and they have correct data types */
static int test_settables(int tstid)
{
EVP_PKEY_CTX *ctx = rctx[tstid];
const OSSL_PARAM *settableparams;
const OSSL_PARAM *p;
return TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, NULL), 1)
&& TEST_ptr(settableparams = EVP_PKEY_CTX_settable_params(ctx))
&& TEST_ptr(p = OSSL_PARAM_locate_const(settableparams,
OSSL_KEM_PARAM_OPERATION))
&& TEST_uint_eq(p->data_type, OSSL_PARAM_UTF8_STRING)
&& TEST_ptr(p = OSSL_PARAM_locate_const(settableparams,
OSSL_KEM_PARAM_IKME))
&& TEST_uint_eq(p->data_type, OSSL_PARAM_OCTET_STRING);
}
/* Test initing multiple times passes */
static int test_init_multiple(int tstid)
{
EVP_PKEY_CTX *ctx = rctx[tstid];
return TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, NULL), 1)
&& TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, NULL), 1)
&& TEST_int_eq(EVP_PKEY_decapsulate_init(ctx, NULL), 1)
&& TEST_int_eq(EVP_PKEY_decapsulate_init(ctx, NULL), 1);
}
/* Fail is various bad inputs are passed to the derivekey (keygen) operation */
static int test_ec_dhkem_derivekey_fail(void)
{
int ret = 0;
EVP_PKEY *pkey = NULL;
OSSL_PARAM params[3];
EVP_PKEY_CTX *genctx = NULL;
const TEST_DERIVEKEY_DATA *t = &ec_derivekey_data[0];
BIGNUM *priv = NULL;
/* Check non nist curve fails */
params[0] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
"secp256k1", 0);
params[1] = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_DHKEM_IKM,
(char *)t->ikm, t->ikmlen);
params[2] = OSSL_PARAM_construct_end();
if (!TEST_ptr(genctx = EVP_PKEY_CTX_new_from_name(libctx, "EC", NULL))
|| !TEST_int_eq(EVP_PKEY_keygen_init(genctx), 1)
|| !TEST_int_eq(EVP_PKEY_CTX_set_params(genctx, params), 1)
|| !TEST_int_eq(EVP_PKEY_generate(genctx, &pkey),0))
goto err;
/* Fail if curve is not one of P-256, P-384 or P-521 */
params[0] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
"P-224", 0);
params[1] = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_DHKEM_IKM,
(char *)t->ikm, t->ikmlen);
params[2] = OSSL_PARAM_construct_end();
if (!TEST_int_eq(EVP_PKEY_keygen_init(genctx), 1)
|| !TEST_int_eq(EVP_PKEY_CTX_set_params(genctx, params), 1)
|| !TEST_int_eq(EVP_PKEY_generate(genctx, &pkey), 0))
goto err;
/* Fail if ikm len is too small*/
params[0] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
"P-256", 0);
params[1] = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_DHKEM_IKM,
(char *)t->ikm, t->ikmlen - 1);
params[2] = OSSL_PARAM_construct_end();
if (!TEST_int_eq(EVP_PKEY_CTX_set_params(genctx, params), 1)
|| !TEST_int_eq(EVP_PKEY_generate(genctx, &pkey), 0))
goto err;
ret = 1;
err:
BN_free(priv);
EVP_PKEY_free(pkey);
EVP_PKEY_CTX_free(genctx);
return ret;
}
/* Fail if the operation parameter is not set */
static int test_no_operation_set(int tstid)
{
EVP_PKEY_CTX *ctx = rctx[tstid];
const TEST_ENCAPDATA *t = &ec_encapdata[tstid];
size_t len = 0;
return TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, NULL), 1)
&& TEST_int_eq(EVP_PKEY_encapsulate(ctx, NULL, &len, NULL, NULL), -2)
&& TEST_int_eq(EVP_PKEY_decapsulate_init(ctx, NULL), 1)
&& TEST_int_eq(EVP_PKEY_decapsulate(ctx, NULL, &len,
t->expected_enc,
t->expected_enclen), -2);
}
/* Fail if the ikm is too small */
static int test_ikm_small(int tstid)
{
unsigned char tmp[16] = { 0 };
unsigned char secret[256];
unsigned char enc[256];
size_t secretlen = sizeof(secret);
size_t enclen = sizeof(enc);
OSSL_PARAM params[3];
EVP_PKEY_CTX *ctx = rctx[tstid];
params[0] = OSSL_PARAM_construct_utf8_string(OSSL_KEM_PARAM_OPERATION,
OSSL_KEM_PARAM_OPERATION_DHKEM,
0);
params[1] = OSSL_PARAM_construct_octet_string(OSSL_KEM_PARAM_IKME,
tmp, sizeof(tmp));
params[2] = OSSL_PARAM_construct_end();
return TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, params), 1)
&& TEST_int_eq(EVP_PKEY_encapsulate(ctx, enc, &enclen,
secret, &secretlen), 0);
}
/* Fail if buffers lengths are too small to hold returned data */
static int test_input_size_small(int tstid)
{
int ret = 0;
unsigned char sec[256];
unsigned char enc[256];
size_t seclen = sizeof(sec);
size_t enclen = sizeof(enc);
EVP_PKEY_CTX *ctx = rctx[tstid];
if (!TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, opparam), 1)
|| !TEST_int_eq(EVP_PKEY_encapsulate(ctx, NULL, &enclen,
NULL, &seclen), 1))
goto err;
/* buffer too small for enc */
enclen--;
if (!TEST_int_eq(EVP_PKEY_encapsulate(ctx, enc, &enclen, sec, &seclen),
0))
goto err;
enclen++;
/* buffer too small for secret */
seclen--;
if (!TEST_int_eq(EVP_PKEY_encapsulate(ctx, enc, &enclen, sec, &seclen), 0))
goto err;
seclen++;
if (!TEST_int_eq(EVP_PKEY_decapsulate_init(ctx, opparam), 1))
goto err;
/* buffer too small for decapsulate secret */
seclen--;
if (!TEST_int_eq(EVP_PKEY_decapsulate(ctx, sec, &seclen, enc, enclen), 0))
goto err;
seclen++;
/* incorrect enclen passed to decap */
enclen--;
ret = TEST_int_eq(EVP_PKEY_decapsulate(ctx, sec, &seclen, enc, enclen), 0);
err:
return ret;
}
/* Fail if the auth key has a different curve */
static int test_ec_auth_key_curve_mismatch(void)
{
int ret = 0;
EVP_PKEY *auth = NULL;
if (!TEST_ptr(auth = EVP_PKEY_Q_keygen(libctx, NULL, "EC", "P-521")))
return 0;
ret = TEST_int_eq(EVP_PKEY_auth_encapsulate_init(rctx[0], auth, opparam), 0);
EVP_PKEY_free(auth);
return ret;
}
/* Fail if the auth key has a different key type to the recipient */
static int test_auth_key_type_mismatch(int tstid)
{
int id1 = tstid;
int id2 = !tstid;
return TEST_int_eq(EVP_PKEY_auth_encapsulate_init(rctx[id1],
rkey[id2], opparam), 0);
}
static int test_ec_invalid_private_key(void)
{
int ret = 0;
EVP_PKEY *priv = NULL;
EVP_PKEY_CTX *ctx = NULL;
const TEST_ENCAPDATA *t = &ec_encapdata[0];
static const unsigned char order[] = {
0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF, 0xBC, 0xE6, 0xFA, 0xAD, 0xA7, 0x17, 0x9E, 0x84,
0xF3, 0xB9, 0xCA, 0xC2, 0xFC, 0x63, 0x25, 0x51
};
ret = TEST_ptr(priv = new_raw_private_key("P-256", order, sizeof(order),
t->rpub, t->rpublen))
&& TEST_ptr(ctx = EVP_PKEY_CTX_new_from_pkey(libctx, priv, NULL))
&& TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, NULL), 0);
EVP_PKEY_free(priv);
EVP_PKEY_CTX_free(ctx);
return ret;
}
static int test_ec_public_key_infinity(void)
{
int ret = 0;
EVP_PKEY *key = NULL;
EVP_PKEY_CTX *keyctx = NULL;
unsigned char s[256];
unsigned char e[256];
size_t slen = sizeof(s);
size_t elen = sizeof(e);
unsigned char tmp[1] = { 0 }; /* The encoding for an EC point at infinity */
EVP_PKEY_CTX *ctx = rctx[0];
const TEST_ENCAPDATA *t = &ec_encapdata[0];
ret = TEST_ptr(key = new_raw_private_key(t->curve, t->rpriv, t->rprivlen,
tmp, sizeof(tmp)))
&& TEST_ptr(keyctx = EVP_PKEY_CTX_new_from_pkey(libctx, key, NULL))
/* Fail if the recipient public key is invalid */
&& TEST_int_eq(EVP_PKEY_encapsulate_init(keyctx, opparam), 1)
&& TEST_int_eq(EVP_PKEY_encapsulate(keyctx, e, &elen, s, &slen), 0)
/* Fail the decap if the recipient public key is invalid */
&& TEST_int_eq(EVP_PKEY_decapsulate_init(keyctx, opparam), 1)
&& TEST_int_eq(EVP_PKEY_decapsulate(keyctx, s, &slen,
t->expected_enc,
t->expected_enclen), 0)
/* Fail if the auth key has a bad public key */
&& TEST_int_eq(EVP_PKEY_auth_encapsulate_init(ctx, key, opparam), 1)
&& TEST_int_eq(EVP_PKEY_encapsulate(ctx, e, &elen, s, &slen), 0);
EVP_PKEY_free(key);
EVP_PKEY_CTX_free(keyctx);
return ret;
}
/* Test incorrectly passing NULL values fail */
static int test_null_params(int tstid)
{
EVP_PKEY_CTX *ctx = rctx[tstid];
const TEST_ENCAPDATA *t = &ec_encapdata[tstid];
/* auth_encap/decap init must be passed a non NULL value */
return TEST_int_eq(EVP_PKEY_auth_encapsulate_init(ctx, NULL, opparam), 0)
&& TEST_int_eq(EVP_PKEY_auth_decapsulate_init(ctx, NULL, opparam), 0)
/* Check decap fails if NULL params are passed */
&& TEST_int_eq(EVP_PKEY_decapsulate_init(ctx, opparam), 1)
&& TEST_int_eq(EVP_PKEY_decapsulate(ctx, NULL, NULL,
t->expected_enc,
t->expected_enclen), 0)
/* Check encap fails if NULL params are passed */
&& TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, opparam), 1)
&& TEST_int_eq(EVP_PKEY_encapsulate(ctx, NULL, NULL,
NULL, NULL), 0);
}
static int test_set_params(int tstid)
{
int ret = 0;
EVP_PKEY_CTX *ctx = rctx[tstid];
OSSL_PARAM badparams[4];
int val = 1;
/* wrong data type for operation param */
badparams[0] = OSSL_PARAM_construct_int(OSSL_KEM_PARAM_OPERATION, &val);
badparams[1] = OSSL_PARAM_construct_end();
if (!TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, badparams), 0))
goto err;
/* unknown string used for the operation param */
badparams[0] = OSSL_PARAM_construct_utf8_string(OSSL_KEM_PARAM_OPERATION,
"unknown_op", 0);
badparams[1] = OSSL_PARAM_construct_end();
if (!TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, badparams), 0))
goto err;
/* NULL string set for the operation param */
badparams[0] = OSSL_PARAM_construct_utf8_string(OSSL_KEM_PARAM_OPERATION,
NULL, 0);
badparams[1] = OSSL_PARAM_construct_end();
if (!TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, badparams), 0))
goto err;
/* wrong data type for ikme param */
badparams[0] = OSSL_PARAM_construct_int(OSSL_KEM_PARAM_IKME, &val);
badparams[1] = OSSL_PARAM_construct_end();
if (!TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, badparams), 0))
goto err;
/* Setting the ikme to NULL is allowed */
badparams[0] = OSSL_PARAM_construct_octet_string(OSSL_KEM_PARAM_IKME, NULL, 0);
badparams[1] = OSSL_PARAM_construct_end();
if (!TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, badparams), 1))
goto err;
/* Test that unknown params are ignored */
badparams[0] = OSSL_PARAM_construct_int("unknownparam", &val);
badparams[1] = OSSL_PARAM_construct_end();
ret = TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, badparams), 1);
err:
return ret;
}
/*
* ECX keys autogen the public key if a private key is loaded,
* So this test passes for ECX, but fails for EC
*/
static int test_nopublic(int tstid)
{
int ret = 0;
EVP_PKEY_CTX *ctx = NULL;
EVP_PKEY *priv = NULL;
int encap = ((tstid & 1) == 0);
int keytype = tstid >= TEST_KEM_ENCAP_DECAP;
const TEST_ENCAPDATA *t = &ec_encapdata[keytype];
int expected = (keytype == TEST_KEYTYPE_X25519);
TEST_note("%s %s", t->curve, encap ? "Encap" : "Decap");
if (!TEST_ptr(priv = new_raw_private_key(t->curve, t->rpriv, t->rprivlen,
NULL, 0)))
goto err;
if (!TEST_ptr(ctx = EVP_PKEY_CTX_new_from_pkey(libctx, priv, NULL)))
goto err;
if (encap) {
if (!TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, opparam), expected))
goto err;
} else {
if (!TEST_int_eq(EVP_PKEY_decapsulate_init(ctx, opparam), expected))
goto err;
}
if (expected == 0
&& !TEST_int_eq(ERR_GET_REASON(ERR_get_error()), PROV_R_NOT_A_PUBLIC_KEY))
goto err;
ret = 1;
err:
EVP_PKEY_free(priv);
EVP_PKEY_CTX_free(ctx);
return ret;
}
/* Test that not setting the auth public key fails the auth encap/decap init */
static int test_noauthpublic(int tstid)
{
int ret = 0;
EVP_PKEY *auth = NULL;
int encap = ((tstid & 1) == 0);
int keytype = tstid >= TEST_KEM_ENCAP_DECAP;
const TEST_ENCAPDATA *t = &ec_encapdata[keytype];
EVP_PKEY_CTX *ctx = rctx[keytype];
int expected = (keytype == TEST_KEYTYPE_X25519);
TEST_note("%s %s", t->curve, encap ? "Encap" : "Decap");
if (!TEST_ptr(auth = new_raw_private_key(t->curve, t->rpriv,
t->rprivlen, NULL, expected)))
goto err;
if (encap) {
if (!TEST_int_eq(EVP_PKEY_auth_encapsulate_init(ctx, auth,
opparam), expected))
goto err;
} else {
if (!TEST_int_eq(EVP_PKEY_auth_decapsulate_init(ctx, auth,
opparam), expected))
goto err;
}
if (expected == 0
&& !TEST_int_eq(ERR_GET_REASON(ERR_get_error()),
PROV_R_NOT_A_PUBLIC_KEY))
goto err;
ret = 1;
err:
EVP_PKEY_free(auth);
return ret;
}
/* EC specific tests */
/* Perform EC DHKEM KATs */
static int test_ec_dhkem_derivekey(int tstid)
{
int ret = 0;
EVP_PKEY *pkey = NULL;
OSSL_PARAM params[3];
EVP_PKEY_CTX *genctx = NULL;
const TEST_DERIVEKEY_DATA *t = &ec_derivekey_data[tstid];
unsigned char pubkey[133];
unsigned char privkey[66];
size_t pubkeylen = 0, privkeylen = 0;
BIGNUM *priv = NULL;
params[0] = OSSL_PARAM_construct_utf8_string(OSSL_PKEY_PARAM_GROUP_NAME,
(char *)t->curvename, 0);
params[1] = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_DHKEM_IKM,
(char *)t->ikm, t->ikmlen);
params[2] = OSSL_PARAM_construct_end();
ret = TEST_ptr(genctx = EVP_PKEY_CTX_new_from_name(libctx, "EC", NULL))
&& TEST_int_eq(EVP_PKEY_keygen_init(genctx), 1)
&& TEST_int_eq(EVP_PKEY_CTX_set_params(genctx, params), 1)
&& TEST_int_eq(EVP_PKEY_generate(genctx, &pkey), 1)
&& TEST_true(EVP_PKEY_get_octet_string_param(pkey,
OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY,
pubkey, sizeof(pubkey), &pubkeylen))
&& TEST_true(EVP_PKEY_get_bn_param(pkey, OSSL_PKEY_PARAM_PRIV_KEY,
&priv))
&& TEST_int_gt(privkeylen = BN_bn2bin(priv, privkey), 0)
&& TEST_int_le(privkeylen, sizeof(privkey))
&& TEST_mem_eq(privkey, privkeylen, t->priv, t->privlen)
&& TEST_mem_eq(pubkey, pubkeylen, t->pub, t->publen);
BN_free(priv);
EVP_PKEY_free(pkey);
EVP_PKEY_CTX_free(genctx);
return ret;
}
/*
* Test that encapsulation uses a random seed if the ikm is not specified,
* and verify that the shared secret matches the decapsulate result.
*/
static int test_ec_noikme(int tstid)
{
int ret = 0, auth = 0;
EVP_PKEY_CTX *ctx = NULL;
EVP_PKEY *recip = NULL;
EVP_PKEY *sender_auth = NULL;
unsigned char sender_secret[256];
unsigned char recip_secret[256];
unsigned char sender_pub[256];
size_t sender_secretlen = sizeof(sender_secret);
size_t recip_secretlen = sizeof(recip_secret);
size_t sender_publen = sizeof(sender_pub);
const char *curve;
int sz = OSSL_NELEM(dhkem_supported_curves);
const char *op = OSSL_KEM_PARAM_OPERATION_DHKEM;
if (tstid >= sz) {
auth = 1;
tstid -= sz;
}
curve = dhkem_supported_curves[tstid];
TEST_note("testing encap/decap of curve %s%s\n", curve,
auth ? " with auth" : "");
if (curve[0] == 'X') {
if (!TEST_ptr(recip = EVP_PKEY_Q_keygen(libctx, NULL, curve))
|| (auth
&& !TEST_ptr(sender_auth = EVP_PKEY_Q_keygen(libctx, NULL,
curve))))
goto err;
} else {
if (!TEST_ptr(recip = EVP_PKEY_Q_keygen(libctx, NULL, "EC", curve))
|| (auth
&& !TEST_ptr(sender_auth = EVP_PKEY_Q_keygen(libctx, NULL,
"EC", curve))))
goto err;
}
ret = TEST_ptr(ctx = EVP_PKEY_CTX_new_from_pkey(libctx, recip, NULL))
&& (sender_auth == NULL
|| TEST_int_eq(EVP_PKEY_auth_encapsulate_init(ctx, sender_auth,
NULL), 1))
&& (sender_auth != NULL
|| TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, NULL), 1))
&& TEST_int_eq(EVP_PKEY_CTX_set_kem_op(ctx, op), 1)
&& TEST_int_eq(EVP_PKEY_encapsulate(ctx, sender_pub, &sender_publen,
sender_secret, &sender_secretlen), 1)
&& (sender_auth == NULL
|| TEST_int_eq(EVP_PKEY_auth_decapsulate_init(ctx, sender_auth,
NULL), 1))
&& (sender_auth != NULL
|| TEST_int_eq(EVP_PKEY_decapsulate_init(ctx, NULL), 1))
&& TEST_int_eq(EVP_PKEY_CTX_set_kem_op(ctx, op), 1)
&& TEST_int_eq(EVP_PKEY_decapsulate(ctx, recip_secret, &recip_secretlen,
sender_pub, sender_publen), 1)
&& TEST_mem_eq(recip_secret, recip_secretlen,
sender_secret, sender_secretlen);
err:
EVP_PKEY_CTX_free(ctx);
EVP_PKEY_free(sender_auth);
EVP_PKEY_free(recip);
return ret;
}
/* Test encap/decap init fail if the curve is invalid */
static int do_ec_curve_failtest(const char *curve)
{
int ret;
EVP_PKEY *key = NULL;
EVP_PKEY_CTX *ctx = NULL;
ret = TEST_ptr(key = EVP_PKEY_Q_keygen(libctx, NULL, "EC", curve))
&& TEST_ptr(ctx = EVP_PKEY_CTX_new_from_pkey(libctx, key, NULL))
&& TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, NULL), -2)
&& TEST_int_eq(EVP_PKEY_decapsulate_init(ctx, NULL), -2);
EVP_PKEY_free(key);
EVP_PKEY_CTX_free(ctx);
return ret;
}
static int test_ec_curve_nonnist(void)
{
return do_ec_curve_failtest("secp256k1");
}
static int test_ec_curve_unsupported(void)
{
return do_ec_curve_failtest("P-224");
}
/* Test that passing a bad recipient public EC key fails during encap/decap */
static int test_ec_badpublic(int tstid)
{
int ret = 0;
EVP_PKEY *recippriv = NULL;
EVP_PKEY_CTX *ctx = NULL;
unsigned char secret[256];
unsigned char pub[256];
size_t secretlen = sizeof(secret);
int encap = ((tstid & 1) == 0);
const TEST_ENCAPDATA *t = &ec_encapdata[0];
TEST_note("%s %s", t->curve, encap ? "Encap" : "Decap");
/* Set the recipient public key to the point at infinity */
pub[0] = 0;
if (!TEST_ptr(recippriv = new_raw_private_key(t->curve, t->rpriv, t->rprivlen,
pub, 1)))
goto err;
if (!TEST_ptr(ctx = EVP_PKEY_CTX_new_from_pkey(libctx, recippriv, NULL)))
goto err;
if (encap) {
unsigned char enc[256];
size_t enclen = sizeof(enc);
if (!TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, opparam), 1))
goto err;
if (!TEST_int_eq(EVP_PKEY_encapsulate(ctx, enc , &enclen,
secret, &secretlen), 0 ))
goto err;
} else {
if (!TEST_int_eq(EVP_PKEY_decapsulate_init(ctx, opparam), 1))
goto err;
if (!TEST_int_eq(EVP_PKEY_decapsulate(ctx, secret, &secretlen,
t->expected_enc,
t->expected_enclen),
0))
goto err;
}
if (!TEST_int_eq(ERR_GET_REASON(ERR_get_error()), PROV_R_INVALID_KEY))
goto err;
ret = 1;
err:
EVP_PKEY_free(recippriv);
EVP_PKEY_CTX_free(ctx);
return ret;
}
static int test_ec_badauth(int tstid)
{
int ret = 0;
EVP_PKEY *auth = NULL;
unsigned char enc[256];
unsigned char secret[256];
unsigned char pub[256];
size_t enclen = sizeof(enc);
size_t secretlen = sizeof(secret);
int encap = ((tstid & 1) == 0);
const TEST_ENCAPDATA *t = &ec_encapdata[TEST_KEYTYPE_P256];
EVP_PKEY_CTX *ctx = rctx[TEST_KEYTYPE_P256];
TEST_note("%s %s", t->curve, encap ? "Encap" : "Decap");
/* Set the auth public key to the point at infinity */
pub[0] = 0;
if (!TEST_ptr(auth = new_raw_private_key(t->curve, t->rpriv, t->rprivlen,
pub, 1)))
goto err;
if (encap) {
if (!TEST_int_eq(EVP_PKEY_auth_encapsulate_init(ctx, auth,
opparam), 1)
|| !TEST_int_eq(EVP_PKEY_encapsulate(ctx, enc, &enclen,
secret, &secretlen), 0))
goto err;
} else {
if (!TEST_int_eq(EVP_PKEY_auth_decapsulate_init(ctx, auth, opparam), 1)
|| !TEST_int_eq(EVP_PKEY_decapsulate(ctx, secret, &secretlen,
t->expected_enc,
t->expected_enclen), 0))
goto err;
}
if (!TEST_int_eq(ERR_GET_REASON(ERR_get_error()), PROV_R_INVALID_KEY))
goto err;
ret = 1;
err:
EVP_PKEY_free(auth);
return ret;
}
static int test_ec_invalid_decap_enc_buffer(void)
{
const TEST_ENCAPDATA *t = &ec_encapdata[TEST_KEYTYPE_P256];
unsigned char enc[256];
unsigned char secret[256];
size_t secretlen = sizeof(secret);
EVP_PKEY_CTX *ctx = rctx[0];
memcpy(enc, t->expected_enc, t->expected_enclen);
enc[0] = 0xFF;
return TEST_int_eq(EVP_PKEY_decapsulate_init(ctx, opparam), 1)
&& TEST_int_eq(EVP_PKEY_decapsulate(ctx, secret, &secretlen,
enc, t->expected_enclen), 0);
}
#ifndef OPENSSL_NO_ECX
/* ECX specific tests */
/* Perform ECX DHKEM KATs */
static int test_ecx_dhkem_derivekey(int tstid)
{
int ret;
OSSL_PARAM params[2];
EVP_PKEY_CTX *genctx;
EVP_PKEY *pkey = NULL;
unsigned char pubkey[64];
unsigned char privkey[64];
unsigned char masked_priv[64];
size_t pubkeylen = 0, privkeylen = 0;
const TEST_DERIVEKEY_DATA *t = &ecx_derivekey_data[tstid];
memcpy(masked_priv, t->priv, t->privlen);
if (OPENSSL_strcasecmp(t->curvename, "X25519") == 0) {
/*
* The RFC test vector seems incorrect since it is not in serialized form,
* So manually do the conversion here for now.
*/
masked_priv[0] &= 248;
masked_priv[t->privlen - 1] &= 127;
masked_priv[t->privlen - 1] |= 64;
} else {
masked_priv[0] &= 252;
masked_priv[t->privlen - 1] |= 128;
}
params[0] = OSSL_PARAM_construct_octet_string(OSSL_PKEY_PARAM_DHKEM_IKM,
(char *)t->ikm, t->ikmlen);
params[1] = OSSL_PARAM_construct_end();
ret = TEST_ptr(genctx = EVP_PKEY_CTX_new_from_name(libctx, t->curvename, NULL))
&& TEST_int_eq(EVP_PKEY_keygen_init(genctx), 1)
&& TEST_int_eq(EVP_PKEY_CTX_set_params(genctx, params), 1)
&& TEST_int_eq(EVP_PKEY_keygen(genctx, &pkey), 1)
&& TEST_int_eq(EVP_PKEY_get_octet_string_param(pkey,
OSSL_PKEY_PARAM_ENCODED_PUBLIC_KEY,
pubkey, sizeof(pubkey), &pubkeylen), 1)
&& TEST_int_eq(EVP_PKEY_get_octet_string_param(pkey,
OSSL_PKEY_PARAM_PRIV_KEY,
privkey, sizeof(privkey), &privkeylen), 1)
&& TEST_mem_eq(t->pub, t->publen, pubkey, pubkeylen)
&& TEST_mem_eq(masked_priv, t->privlen, privkey, privkeylen);
EVP_PKEY_free(pkey);
EVP_PKEY_CTX_free(genctx);
return ret;
}
/* Fail if the auth key has a different curve */
static int test_ecx_auth_key_curve_mismatch(void)
{
int ret = 0;
EVP_PKEY *auth = NULL;
if (!TEST_ptr(auth = EVP_PKEY_Q_keygen(libctx, NULL, "X448")))
return 0;
ret = TEST_int_eq(EVP_PKEY_auth_encapsulate_init(rctx[TEST_KEYTYPE_X25519],
auth, opparam), 0);
EVP_PKEY_free(auth);
return ret;
}
/* Fail if ED448 is used for DHKEM */
static int test_ed_curve_unsupported(void)
{
int ret;
EVP_PKEY *key = NULL;
EVP_PKEY_CTX *ctx = NULL;
ret = TEST_ptr(key = EVP_PKEY_Q_keygen(libctx, NULL, "ED448"))
&& TEST_ptr(ctx = EVP_PKEY_CTX_new_from_pkey(libctx, key, NULL))
&& TEST_int_eq(EVP_PKEY_encapsulate_init(ctx, NULL), -2)
&& TEST_int_eq(EVP_PKEY_decapsulate_init(ctx, NULL), -2);
EVP_PKEY_free(key);
EVP_PKEY_CTX_free(ctx);
return ret;
}
#endif
int setup_tests(void)
{
const char *prov_name = "default";
char *config_file = NULL;
char *op = OSSL_KEM_PARAM_OPERATION_DHKEM;
if (!test_get_libctx(&libctx, &nullprov, config_file, &libprov, prov_name))
return 0;
opparam[0] = OSSL_PARAM_construct_utf8_string(OSSL_KEM_PARAM_OPERATION,
op, 0);
opparam[1] = OSSL_PARAM_construct_end();
/* Create P256 and X25519 keys and ctxs */
if (!TEST_ptr(rkey[TEST_KEYTYPE_P256] = EVP_PKEY_Q_keygen(libctx, NULL,
"EC", "P-256")))
goto err;
#ifndef OPENSSL_NO_ECX
if (!TEST_ptr(rkey[TEST_KEYTYPE_X25519] = EVP_PKEY_Q_keygen(libctx, NULL,
"X25519")))
goto err;
#endif
if (!TEST_ptr(rctx[TEST_KEYTYPE_P256] =
EVP_PKEY_CTX_new_from_pkey(libctx,
rkey[TEST_KEYTYPE_P256], NULL)))
goto err;
#ifndef OPENSSL_NO_ECX
if (!TEST_ptr(rctx[TEST_KEYTYPE_X25519] =
EVP_PKEY_CTX_new_from_pkey(libctx,
rkey[TEST_KEYTYPE_X25519], NULL)))
goto err;
#endif
ADD_ALL_TESTS(test_dhkem_encapsulate, OSSL_NELEM(ec_encapdata));
ADD_ALL_TESTS(test_dhkem_decapsulate, OSSL_NELEM(ec_encapdata));
#ifndef OPENSSL_NO_ECX
ADD_ALL_TESTS(test_settables, TEST_KEYTYPES_P256_X25519);
ADD_ALL_TESTS(test_init_multiple, TEST_KEYTYPES_P256_X25519);
ADD_ALL_TESTS(test_auth_key_type_mismatch, TEST_KEYTYPES_P256_X25519);
ADD_ALL_TESTS(test_no_operation_set, TEST_KEYTYPES_P256_X25519);
ADD_ALL_TESTS(test_ikm_small, TEST_KEYTYPES_P256_X25519);
ADD_ALL_TESTS(test_input_size_small, TEST_KEYTYPES_P256_X25519);
ADD_ALL_TESTS(test_null_params, TEST_KEYTYPES_P256_X25519);
ADD_ALL_TESTS(test_set_params, TEST_KEYTYPES_P256_X25519);
ADD_ALL_TESTS(test_nopublic,
TEST_KEM_ENCAP_DECAP * TEST_KEYTYPES_P256_X25519);
ADD_ALL_TESTS(test_noauthpublic,
TEST_KEM_ENCAP_DECAP * TEST_KEYTYPES_P256_X25519);
#else
ADD_ALL_TESTS(test_settables, TEST_KEYTYPE_P256);
ADD_ALL_TESTS(test_init_multiple, TEST_KEYTYPE_P256);
ADD_ALL_TESTS(test_auth_key_type_mismatch, TEST_KEYTYPE_P256);
ADD_ALL_TESTS(test_no_operation_set, TEST_KEYTYPE_P256);
ADD_ALL_TESTS(test_ikm_small, TEST_KEYTYPE_P256);
ADD_ALL_TESTS(test_input_size_small, TEST_KEYTYPE_P256);
ADD_ALL_TESTS(test_null_params, TEST_KEYTYPE_P256);
ADD_ALL_TESTS(test_set_params, TEST_KEYTYPE_P256);
ADD_ALL_TESTS(test_nopublic,
TEST_KEM_ENCAP_DECAP * TEST_KEYTYPE_P256);
ADD_ALL_TESTS(test_noauthpublic,
TEST_KEM_ENCAP_DECAP * TEST_KEYTYPE_P256);
#endif
/* EC Specific tests */
ADD_ALL_TESTS(test_ec_dhkem_derivekey, OSSL_NELEM(ec_derivekey_data));
ADD_ALL_TESTS(test_ec_noikme,
TEST_TYPE_AUTH_NOAUTH * OSSL_NELEM(dhkem_supported_curves));
ADD_TEST(test_ec_auth_key_curve_mismatch);
ADD_TEST(test_ec_invalid_private_key);
ADD_TEST(test_ec_dhkem_derivekey_fail);
ADD_TEST(test_ec_curve_nonnist);
ADD_TEST(test_ec_curve_unsupported);
ADD_TEST(test_ec_invalid_decap_enc_buffer);
ADD_TEST(test_ec_public_key_infinity);
ADD_ALL_TESTS(test_ec_badpublic, TEST_KEM_ENCAP_DECAP);
ADD_ALL_TESTS(test_ec_badauth, TEST_KEM_ENCAP_DECAP);
/* ECX specific tests */
#ifndef OPENSSL_NO_ECX
ADD_ALL_TESTS(test_ecx_dhkem_derivekey, OSSL_NELEM(ecx_derivekey_data));
ADD_TEST(test_ecx_auth_key_curve_mismatch);
ADD_TEST(test_ed_curve_unsupported);
#endif
return 1;
err:
return 0;
}
void cleanup_tests(void)
{
EVP_PKEY_free(rkey[1]);
EVP_PKEY_free(rkey[0]);
EVP_PKEY_CTX_free(rctx[1]);
EVP_PKEY_CTX_free(rctx[0]);
OSSL_PROVIDER_unload(libprov);
OSSL_LIB_CTX_free(libctx);
OSSL_PROVIDER_unload(nullprov);
}
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