Commit 821d6c6d authored by Nicola Tuveri's avatar Nicola Tuveri Committed by Rich Salz
Browse files

ecdhtest.c: move co-factor ECDH KATs to evptests 



move NIST SP800-56A co-factor ECDH KATs from ecdhtest.c to evptests.txt

Reviewed-by: default avatarRichard Levitte <levitte@openssl.org>
Reviewed-by: default avatarRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3219)
parent 4afc6060

test/ecdhtest.c

+1 −167
Original line number Diff line number Diff line
@@ -49,171 +49,9 @@ int main(int argc, char *argv[]) 
static const char rnd_seed[] =

    "string to make the random number generator think it has entropy";



/* Given private value and NID, create EC_KEY structure */



static EC_KEY *mk_eckey(int nid, const char *str)

{

    int ok = 0;

    EC_KEY *k = NULL;

    BIGNUM *priv = NULL;

    EC_POINT *pub = NULL;

    const EC_GROUP *grp;

    k = EC_KEY_new_by_curve_name(nid);

    if (!k)

        goto err;

    if(!BN_hex2bn(&priv, str))

        goto err;

    if (!priv)

        goto err;

    if (!EC_KEY_set_private_key(k, priv))

        goto err;

    grp = EC_KEY_get0_group(k);

    pub = EC_POINT_new(grp);

    if (!pub)

        goto err;

    if (!EC_POINT_mul(grp, pub, priv, NULL, NULL, NULL))

        goto err;

    if (!EC_KEY_set_public_key(k, pub))

        goto err;

    ok = 1;

 err:

    BN_clear_free(priv);

    EC_POINT_free(pub);

    if (ok)

        return k;

    EC_KEY_free(k);

    return NULL;

}



#include "ecdhtest_cavs.h"



/*

 * NIST SP800-56A co-factor ECDH tests.

 * KATs taken from NIST documents with parameters:

 *

 * - (QCAVSx,QCAVSy) is the public key for CAVS.

 * - dIUT is the private key for IUT.

 * - (QIUTx,QIUTy) is the public key for IUT.

 * - ZIUT is the shared secret KAT.

 *

 * CAVS: Cryptographic Algorithm Validation System

 * IUT: Implementation Under Test

 *

 * This function tests two things:

 *

 * 1. dIUT * G = (QIUTx,QIUTy)

 *    i.e. public key for IUT computes correctly.

 * 2. x-coord of cofactor * dIUT * (QCAVSx,QCAVSy) = ZIUT

 *    i.e. co-factor ECDH key computes correctly.

 *

 * returns zero on failure or unsupported curve. One otherwise.

 */

static int ecdh_cavs_kat(BIO *out, const ecdh_cavs_kat_t *kat)

{

    int rv = 0, is_char_two = 0;

    EC_KEY *key1 = NULL;

    EC_POINT *pub = NULL;

    const EC_GROUP *group = NULL;

    BIGNUM *bnz = NULL, *x = NULL, *y = NULL;

    unsigned char *Ztmp = NULL, *Z = NULL;

    size_t Ztmplen, Zlen;

    BIO_puts(out, "Testing ECC CDH Primitive SP800-56A with ");

    BIO_puts(out, OBJ_nid2sn(kat->nid));



    /* dIUT is IUT's private key */

    if ((key1 = mk_eckey(kat->nid, kat->dIUT)) == NULL)

        goto err;

    /* these are cofactor ECDH KATs */

    EC_KEY_set_flags(key1, EC_FLAG_COFACTOR_ECDH);



    if ((group = EC_KEY_get0_group(key1)) == NULL)

        goto err;

    if ((pub = EC_POINT_new(group)) == NULL)

        goto err;



    if (EC_METHOD_get_field_type(EC_GROUP_method_of(group)) == NID_X9_62_characteristic_two_field)

        is_char_two = 1;



    /* (QIUTx, QIUTy) is IUT's public key */

    if(!BN_hex2bn(&x, kat->QIUTx))

        goto err;

    if(!BN_hex2bn(&y, kat->QIUTy))

        goto err;

    if (is_char_two) {

#ifdef OPENSSL_NO_EC2M

        goto err;

#else

        if (!EC_POINT_set_affine_coordinates_GF2m(group, pub, x, y, NULL))

            goto err;

#endif

    }

    else {

        if (!EC_POINT_set_affine_coordinates_GFp(group, pub, x, y, NULL))

            goto err;

    }

    /* dIUT * G = (QIUTx, QIUTy) should hold */

    if (EC_POINT_cmp(group, EC_KEY_get0_public_key(key1), pub, NULL))

        goto err;



    /* (QCAVSx, QCAVSy) is CAVS's public key */

    if(!BN_hex2bn(&x, kat->QCAVSx))

        goto err;

    if(!BN_hex2bn(&y, kat->QCAVSy))

        goto err;

    if (is_char_two) {

#ifdef OPENSSL_NO_EC2M

        goto err;

#else

        if (!EC_POINT_set_affine_coordinates_GF2m(group, pub, x, y, NULL))

            goto err;

#endif

    }

    else {

        if (!EC_POINT_set_affine_coordinates_GFp(group, pub, x, y, NULL))

            goto err;

    }



    /* ZIUT is the shared secret */

    if(!BN_hex2bn(&bnz, kat->ZIUT))

        goto err;

    Ztmplen = (EC_GROUP_get_degree(EC_KEY_get0_group(key1)) + 7) / 8;

    Zlen = BN_num_bytes(bnz);

    if (Zlen > Ztmplen)

        goto err;

    if((Ztmp = OPENSSL_zalloc(Ztmplen)) == NULL)

        goto err;

    if((Z = OPENSSL_zalloc(Ztmplen)) == NULL)

        goto err;

    if(!BN_bn2binpad(bnz, Z, Ztmplen))

        goto err;

    if (!ECDH_compute_key(Ztmp, Ztmplen, pub, key1, 0))

        goto err;

    /* shared secrets should be identical */

    if (memcmp(Ztmp, Z, Ztmplen))

        goto err;

    rv = 1;

 err:

    EC_KEY_free(key1);

    EC_POINT_free(pub);

    BN_free(bnz);

    BN_free(x);

    BN_free(y);

    OPENSSL_free(Ztmp);

    OPENSSL_free(Z);

    if (rv) {

        BIO_puts(out, " ok\n");

    }

    else {

        fprintf(stderr, "Error in ECC CDH routines\n");

        ERR_print_errors_fp(stderr);

    }

    return rv;

}



int main(int argc, char *argv[])

{

    int ret = 1;

    size_t n = 0;

    BIO *out;



    CRYPTO_set_mem_debug(1);
@@ -230,11 +68,7 @@ int main(int argc, char *argv[]) 


    /* KATs: moved to evptests.txt  */



    /* NIST SP800-56A co-factor ECDH KATs */

    for (n = 0; n < (sizeof(ecdh_cavs_kats)/sizeof(ecdh_cavs_kat_t)); n++) {

        if (!ecdh_cavs_kat(out, &ecdh_cavs_kats[n]))

            goto err;

    }

    /* NIST SP800-56A co-factor ECDH KATs: moved to evptests.txt */



    ret = 0;

test/ecdhtest_cavs.h

deleted100644 → 0
+0 −4312

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test/evptests.txt

+10239 −0

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