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openssl.c
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openssl.c
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#include "native.h"
#include <string.h>
#include <openssl/conf.h>
#include <openssl/opensslv.h>
#include <openssl/objects.h>
#include <openssl/obj_mac.h>
#include <openssl/bn.h>
#include <openssl/evp.h>
#include <openssl/err.h>
#include <openssl/ec.h>
#include <openssl/ecdsa.h>
#include "c_utils.h"
#include "c_timing.h"
static jclass provider_class;
JNIEXPORT jobject JNICALL Java_cz_crcs_ectester_standalone_libs_OpensslLib_createProvider(JNIEnv *env, jobject self) {
/* Create the custom provider. */
jclass local_provider_class = (*env)->FindClass(env, "cz/crcs/ectester/standalone/libs/jni/NativeProvider$Openssl");
provider_class = (*env)->NewGlobalRef(env, local_provider_class);
jmethodID init = (*env)->GetMethodID(env, local_provider_class, "<init>", "(Ljava/lang/String;DLjava/lang/String;)V");
jstring name = (*env)->NewStringUTF(env, OPENSSL_VERSION_TEXT);
long ver_hi = (OPENSSL_VERSION_NUMBER & 0xff000000L) >> 28;
long ver_mid = (OPENSSL_VERSION_NUMBER & 0xff0000L) >> 20;
long ver_low = (OPENSSL_VERSION_NUMBER & 0xff00L) >> 12;
double version = (double)ver_hi + ((double)ver_mid/10) + ((double)ver_low/100);
return (*env)->NewObject(env, provider_class, init, name, version, name);
}
JNIEXPORT void JNICALL Java_cz_crcs_ectester_standalone_libs_jni_NativeProvider_00024Openssl_setup(JNIEnv *env, jobject self) {
OPENSSL_no_config();
ERR_load_crypto_strings();
OpenSSL_add_all_algorithms();
INIT_PROVIDER(env, provider_class);
ADD_KPG(env, self, "EC", "Openssl");
ADD_KA(env, self, "ECDH", "OpensslECDH");
ADD_SIG(env, self, "NONEwithECDSA", "OpensslECDSAwithNONE");
init_classes(env, "Openssl");
}
JNIEXPORT jobject JNICALL Java_cz_crcs_ectester_standalone_libs_OpensslLib_getCurves(JNIEnv *env, jobject self) {
jclass hash_set_class = (*env)->FindClass(env, "java/util/TreeSet");
jmethodID hash_set_ctr = (*env)->GetMethodID(env, hash_set_class, "<init>", "()V");
jmethodID hash_set_add = (*env)->GetMethodID(env, hash_set_class, "add", "(Ljava/lang/Object;)Z");
jobject result = (*env)->NewObject(env, hash_set_class, hash_set_ctr);
size_t ncurves = EC_get_builtin_curves(NULL, 0);
EC_builtin_curve curves[ncurves];
EC_get_builtin_curves(curves, ncurves);
for (size_t i = 0; i < ncurves; ++i) {
jstring curve_name = (*env)->NewStringUTF(env, OBJ_nid2sn(curves[i].nid));
(*env)->CallBooleanMethod(env, result, hash_set_add, curve_name);
}
return result;
}
JNIEXPORT jboolean JNICALL Java_cz_crcs_ectester_standalone_libs_jni_NativeKeyPairGeneratorSpi_00024Openssl_keysizeSupported(JNIEnv *env, jobject self, jint keysize) {
size_t ncurves = EC_get_builtin_curves(NULL, 0);
EC_builtin_curve curves[ncurves];
EC_get_builtin_curves(curves, ncurves);
for (size_t i = 0; i < ncurves; ++i) {
EC_GROUP *curve = EC_GROUP_new_by_curve_name(curves[i].nid);
if (EC_GROUP_get_degree(curve) == keysize) {
EC_GROUP_clear_free(curve);
return JNI_TRUE;
}
EC_GROUP_free(curve);
}
return JNI_FALSE;
}
static jobject bignum_to_biginteger(JNIEnv *env, const BIGNUM *bn) {
jmethodID biginteger_init = (*env)->GetMethodID(env, biginteger_class, "<init>", "(I[B)V");
int size = BN_num_bytes(bn);
jbyteArray bytes = (*env)->NewByteArray(env, size);
jbyte *data = (*env)->GetByteArrayElements(env, bytes, NULL);
BN_bn2bin(bn, (unsigned char *) data);
(*env)->ReleaseByteArrayElements(env, bytes, data, 0);
jobject result = (*env)->NewObject(env, biginteger_class, biginteger_init, 1, bytes);
return result;
}
static BIGNUM *biginteger_to_bignum(JNIEnv *env, jobject bigint) {
jmethodID to_byte_array = (*env)->GetMethodID(env, biginteger_class, "toByteArray", "()[B");
jbyteArray byte_array = (jbyteArray) (*env)->CallObjectMethod(env, bigint, to_byte_array);
jsize byte_length = (*env)->GetArrayLength(env, byte_array);
jbyte *byte_data = (*env)->GetByteArrayElements(env, byte_array, NULL);
BIGNUM *result = BN_bin2bn((unsigned char *) byte_data, byte_length, NULL);
(*env)->ReleaseByteArrayElements(env, byte_array, byte_data, JNI_ABORT);
return result;
}
static EC_GROUP *create_curve(JNIEnv *env, jobject params) {
jmethodID get_curve = (*env)->GetMethodID(env, ec_parameter_spec_class, "getCurve", "()Ljava/security/spec/EllipticCurve;");
jobject elliptic_curve = (*env)->CallObjectMethod(env, params, get_curve);
jmethodID get_field = (*env)->GetMethodID(env, elliptic_curve_class, "getField", "()Ljava/security/spec/ECField;");
jobject field = (*env)->CallObjectMethod(env, elliptic_curve, get_field);
jmethodID get_a = (*env)->GetMethodID(env, elliptic_curve_class, "getA", "()Ljava/math/BigInteger;");
jobject a = (*env)->CallObjectMethod(env, elliptic_curve, get_a);
BIGNUM *a_bn = biginteger_to_bignum(env, a);
jmethodID get_b = (*env)->GetMethodID(env, elliptic_curve_class, "getB", "()Ljava/math/BigInteger;");
jobject b = (*env)->CallObjectMethod(env, elliptic_curve, get_b);
BIGNUM *b_bn = biginteger_to_bignum(env, b);
jmethodID get_g = (*env)->GetMethodID(env, ec_parameter_spec_class, "getGenerator", "()Ljava/security/spec/ECPoint;");
jobject g = (*env)->CallObjectMethod(env, params, get_g);
jmethodID get_x = (*env)->GetMethodID(env, point_class, "getAffineX", "()Ljava/math/BigInteger;");
jobject gx = (*env)->CallObjectMethod(env, g, get_x);
BIGNUM *gx_bn = biginteger_to_bignum(env, gx);
jmethodID get_y = (*env)->GetMethodID(env, point_class, "getAffineY", "()Ljava/math/BigInteger;");
jobject gy = (*env)->CallObjectMethod(env, g, get_y);
BIGNUM *gy_bn = biginteger_to_bignum(env, gy);
EC_GROUP *result;
EC_POINT *g_point;
if ((*env)->IsInstanceOf(env, field, fp_field_class)) {
jmethodID get_p = (*env)->GetMethodID(env, fp_field_class, "getP", "()Ljava/math/BigInteger;");
jobject p = (*env)->CallObjectMethod(env, field, get_p);
BIGNUM *p_bn = biginteger_to_bignum(env, p);
result = EC_GROUP_new_curve_GFp(p_bn, a_bn, b_bn, NULL);
BN_free(p_bn);
if (!result) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating EC_GROUP, EC_GROUP_new_curve_GFp.");
BN_free(a_bn); BN_free(b_bn); BN_free(gx_bn); BN_free(gy_bn);
return NULL;
}
g_point = EC_POINT_new(result);
if(!EC_POINT_set_affine_coordinates_GFp(result, g_point, gx_bn, gy_bn, NULL)) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating EC_GROUP, EC_POINT_set_affine_coordinates_GFp.");
BN_free(a_bn); BN_free(b_bn); BN_free(gx_bn); BN_free(gy_bn); EC_POINT_free(g_point); EC_GROUP_free(result);
return NULL;
}
} else if ((*env)->IsInstanceOf(env, field, f2m_field_class)) {
jmethodID get_reduction_poly = (*env)->GetMethodID(env, f2m_field_class, "getReductionPolynomial", "()Ljava/math/BigInteger;");
jobject red_poly = (*env)->CallObjectMethod(env, field, get_reduction_poly);
BIGNUM *p_bn = biginteger_to_bignum(env, red_poly);
result = EC_GROUP_new_curve_GF2m(p_bn, a_bn, b_bn, NULL);
BN_free(p_bn);
if (!result) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating EC_GROUP, EC_GROUP_new_curve_GF2m.");
BN_free(a_bn); BN_free(b_bn); BN_free(gx_bn); BN_free(gy_bn);
return NULL;
}
g_point = EC_POINT_new(result);
if(!EC_POINT_set_affine_coordinates_GF2m(result, g_point, gx_bn, gy_bn, NULL)) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating EC_GROUP, EC_POINT_set_affine_coordinates_GF2m.");
BN_free(a_bn); BN_free(b_bn); BN_free(gx_bn); BN_free(gy_bn); EC_POINT_free(g_point); EC_GROUP_free(result);
return NULL;
}
} else {
return NULL;
}
BN_free(a_bn);
BN_free(b_bn);
jmethodID get_n = (*env)->GetMethodID(env, ec_parameter_spec_class, "getOrder", "()Ljava/math/BigInteger;");
jobject n = (*env)->CallObjectMethod(env, params, get_n);
BIGNUM *n_bn = biginteger_to_bignum(env, n);
jmethodID get_h = (*env)->GetMethodID(env, ec_parameter_spec_class, "getCofactor", "()I");
jint h = (*env)->CallIntMethod(env, params, get_h);
BIGNUM *h_bn = BN_new();
BN_set_word(h_bn, h);
if (!EC_GROUP_set_generator(result, g_point, n_bn, h_bn)) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating EC_GROUP, EC_GROUP_set_generator.");
BN_free(n_bn); BN_free(h_bn); BN_free(gx_bn); BN_free(gy_bn); EC_POINT_free(g_point); EC_GROUP_free(result);
return NULL;
}
EC_POINT_free(g_point);
BN_free(gx_bn);
BN_free(gy_bn);
BN_free(n_bn);
BN_free(h_bn);
return result;
}
JNIEXPORT jboolean JNICALL Java_cz_crcs_ectester_standalone_libs_jni_NativeKeyPairGeneratorSpi_00024Openssl_paramsSupported(JNIEnv *env, jobject self, jobject params){
if (params == NULL) {
return JNI_FALSE;
}
if ((*env)->IsInstanceOf(env, params, ec_parameter_spec_class)) {
EC_GROUP *curve = create_curve(env, params);
jboolean result = (EC_GROUP_check(curve, NULL) == 1) ? JNI_TRUE : JNI_FALSE;
EC_GROUP_free(curve);
return result;
} else if ((*env)->IsInstanceOf(env, params, ecgen_parameter_spec_class)) {
jmethodID get_name = (*env)->GetMethodID(env, ecgen_parameter_spec_class, "getName", "()Ljava/lang/String;");
jstring name = (*env)->CallObjectMethod(env, params, get_name);
const char *utf_name = (*env)->GetStringUTFChars(env, name, NULL);
size_t ncurves = EC_get_builtin_curves(NULL, 0);
EC_builtin_curve curves[ncurves];
EC_get_builtin_curves(curves, ncurves);
for (size_t i = 0; i < ncurves; ++i) {
if (strcasecmp(utf_name, OBJ_nid2sn(curves[i].nid)) == 0) {
(*env)->ReleaseStringUTFChars(env, name, utf_name);
return JNI_TRUE;
}
}
(*env)->ReleaseStringUTFChars(env, name, utf_name);
return JNI_FALSE;
} else {
return JNI_FALSE;
}
}
static jobject create_ec_param_spec(JNIEnv *env, const EC_GROUP *curve) {
int field_type = EC_METHOD_get_field_type(EC_GROUP_method_of(curve));
BIGNUM *a;
BIGNUM *b;
BIGNUM *gx;
BIGNUM *gy;
jobject field;
if (field_type == NID_X9_62_prime_field) {
BIGNUM *p = BN_new();
a = BN_new();
b = BN_new();
if (!EC_GROUP_get_curve_GFp(curve, p, a, b, NULL)) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating ECParameterSpec, EC_GROUP_get_curve_GFp.");
BN_free(p); BN_free(a); BN_free(b);
return NULL;
}
jobject p_int = bignum_to_biginteger(env, p);
jmethodID fp_field_init = (*env)->GetMethodID(env, fp_field_class, "<init>", "(Ljava/math/BigInteger;)V");
field = (*env)->NewObject(env, fp_field_class, fp_field_init, p_int);
BN_free(p);
gx = BN_new();
gy = BN_new();
if (!EC_POINT_get_affine_coordinates_GFp(curve, EC_GROUP_get0_generator(curve), gx, gy, NULL)) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating ECParameterSpec, EC_POINT_get_affine_coordinates_GFp.");
BN_free(a); BN_free(b); BN_free(gx); BN_free(gy);
return NULL;
}
} else if (field_type == NID_X9_62_characteristic_two_field) {
a = BN_new();
b = BN_new();
if (!EC_GROUP_get_curve_GF2m(curve, NULL, a, b, NULL)) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating ECParameterSpec, EC_GROUP_get_curve_GF2m.");
BN_free(a); BN_free(b);
return NULL;
}
int basis_type = EC_GROUP_get_basis_type(curve);
jintArray ks;
jint *ks_data;
if (basis_type == NID_X9_62_tpBasis) {
ks = (*env)->NewIntArray(env, 1);
ks_data = (*env)->GetIntArrayElements(env, ks, NULL);
if (!EC_GROUP_get_trinomial_basis(curve, (unsigned int *) &ks_data[0])) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating ECParameterSpec, EC_GROUP_get_trinomial_basis.");
BN_free(a); BN_free(b);
(*env)->ReleaseIntArrayElements(env, ks, ks_data, JNI_ABORT);
return NULL;
}
} else if (basis_type == NID_X9_62_ppBasis) {
ks = (*env)->NewIntArray(env, 3);
ks_data = (*env)->GetIntArrayElements(env, ks, NULL);
if (!EC_GROUP_get_pentanomial_basis(curve, (unsigned int *) &ks_data[0], (unsigned int *) &ks_data[1], (unsigned int *) &ks_data[2])) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating ECParameterSpec, EC_GROUP_get_pentanomial_basis.");
BN_free(a); BN_free(b);
(*env)->ReleaseIntArrayElements(env, ks, ks_data, JNI_ABORT);
return NULL;
}
} else {
return NULL;
}
(*env)->ReleaseIntArrayElements(env, ks, ks_data, 0);
jint m = EC_GROUP_get_degree(curve);
jmethodID f2m_field_init = (*env)->GetMethodID(env, f2m_field_class, "<init>", "(I[I)V");
field = (*env)->NewObject(env, f2m_field_class, f2m_field_init, m, ks);
gx = BN_new();
gy = BN_new();
if (!EC_POINT_get_affine_coordinates_GF2m(curve, EC_GROUP_get0_generator(curve), gx, gy, NULL)) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating ECParameterSpec, EC_POINT_get_affine_coordinates_GF2m.");
BN_free(a); BN_free(b); BN_free(gx); BN_free(gy);
return NULL;
}
} else {
return NULL;
}
jobject a_int = bignum_to_biginteger(env, a);
jobject b_int = bignum_to_biginteger(env, b);
jmethodID elliptic_curve_init = (*env)->GetMethodID(env, elliptic_curve_class, "<init>", "(Ljava/security/spec/ECField;Ljava/math/BigInteger;Ljava/math/BigInteger;)V");
jobject elliptic_curve = (*env)->NewObject(env, elliptic_curve_class, elliptic_curve_init, field, a_int, b_int);
BN_free(a);
BN_free(b);
jobject gx_int = bignum_to_biginteger(env, gx);
jobject gy_int = bignum_to_biginteger(env, gy);
BN_free(gx);
BN_free(gy);
jmethodID point_init = (*env)->GetMethodID(env, point_class, "<init>", "(Ljava/math/BigInteger;Ljava/math/BigInteger;)V");
jobject g = (*env)->NewObject(env, point_class, point_init, gx_int, gy_int);
jobject order = bignum_to_biginteger(env, EC_GROUP_get0_order(curve));
jint cofactor = BN_get_word(EC_GROUP_get0_cofactor(curve));
jmethodID ec_parameter_spec_init = (*env)->GetMethodID(env, ec_parameter_spec_class, "<init>", "(Ljava/security/spec/EllipticCurve;Ljava/security/spec/ECPoint;Ljava/math/BigInteger;I)V");
return (*env)->NewObject(env, ec_parameter_spec_class, ec_parameter_spec_init, elliptic_curve, g, order, cofactor);
}
static jobject generate_from_curve(JNIEnv *env, const EC_GROUP *curve) {
jint keysize = EC_GROUP_get_degree(curve);
unsigned long key_bytes = (keysize + 7) / 8;
EC_KEY *key = EC_KEY_new();
EC_KEY_set_group(key, curve);
native_timing_start();
int result = EC_KEY_generate_key(key);
native_timing_stop();
if (!result) {
throw_new(env, "java/security/GeneralSecurityException", "Error generating key, EC_KEY_generate_key.");
EC_KEY_free(key);
return NULL;
}
jbyteArray priv_bytes = (*env)->NewByteArray(env, key_bytes);
jbyte *key_priv = (*env)->GetByteArrayElements(env, priv_bytes, NULL);
BN_bn2binpad(EC_KEY_get0_private_key(key), (unsigned char *) key_priv, key_bytes);
(*env)->ReleaseByteArrayElements(env, priv_bytes, key_priv, 0);
unsigned long key_len = 2*key_bytes + 1;
jbyteArray pub_bytes = (*env)->NewByteArray(env, key_len);
jbyte *key_pub = (*env)->GetByteArrayElements(env, pub_bytes, NULL);
EC_POINT_point2oct(curve, EC_KEY_get0_public_key(key), POINT_CONVERSION_UNCOMPRESSED, (unsigned char *) key_pub, key_len, NULL);
(*env)->ReleaseByteArrayElements(env, pub_bytes, key_pub, 0);
EC_KEY_free(key);
jobject ec_param_spec = create_ec_param_spec(env, curve);
jobject ec_pub_param_spec = (*env)->NewLocalRef(env, ec_param_spec);
jmethodID ec_pub_init = (*env)->GetMethodID(env, pubkey_class, "<init>", "([BLjava/security/spec/ECParameterSpec;)V");
jobject pubkey = (*env)->NewObject(env, pubkey_class, ec_pub_init, pub_bytes, ec_pub_param_spec);
jobject ec_priv_param_spec = (*env)->NewLocalRef(env, ec_param_spec);
jmethodID ec_priv_init = (*env)->GetMethodID(env, privkey_class, "<init>", "([BLjava/security/spec/ECParameterSpec;)V");
jobject privkey = (*env)->NewObject(env, privkey_class, ec_priv_init, priv_bytes, ec_priv_param_spec);
jmethodID keypair_init = (*env)->GetMethodID(env, keypair_class, "<init>", "(Ljava/security/PublicKey;Ljava/security/PrivateKey;)V");
return (*env)->NewObject(env, keypair_class, keypair_init, pubkey, privkey);
}
JNIEXPORT jobject JNICALL Java_cz_crcs_ectester_standalone_libs_jni_NativeKeyPairGeneratorSpi_00024Openssl_generate__ILjava_security_SecureRandom_2(JNIEnv *env, jobject self, jint keysize, jobject random) {
size_t ncurves = EC_get_builtin_curves(NULL, 0);
EC_builtin_curve curves[ncurves];
EC_get_builtin_curves(curves, ncurves);
EC_GROUP *curve = NULL;
for (size_t i = 0; i < ncurves; ++i) {
curve = EC_GROUP_new_by_curve_name(curves[i].nid);
if (EC_GROUP_get_degree(curve) == keysize) {
break;
}
EC_GROUP_free(curve);
}
if (!curve) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Curve for given bitsize not found.");
return NULL;
}
jobject result = generate_from_curve(env, curve);
EC_GROUP_free(curve);
return result;
}
JNIEXPORT jobject JNICALL Java_cz_crcs_ectester_standalone_libs_jni_NativeKeyPairGeneratorSpi_00024Openssl_generate__Ljava_security_spec_AlgorithmParameterSpec_2Ljava_security_SecureRandom_2(JNIEnv *env, jobject self, jobject params, jobject random) {
if ((*env)->IsInstanceOf(env, params, ec_parameter_spec_class)) {
EC_GROUP *curve = create_curve(env, params);
jobject result = generate_from_curve(env, curve);
EC_GROUP_free(curve);
return result;
} else if ((*env)->IsInstanceOf(env, params, ecgen_parameter_spec_class)) {
jmethodID get_name = (*env)->GetMethodID(env, ecgen_parameter_spec_class, "getName", "()Ljava/lang/String;");
jstring name = (*env)->CallObjectMethod(env, params, get_name);
const char* utf_name = (*env)->GetStringUTFChars(env, name, NULL);
size_t ncurves = EC_get_builtin_curves(NULL, 0);
EC_builtin_curve curves[ncurves];
EC_get_builtin_curves(curves, ncurves);
EC_GROUP *curve = NULL;
for (size_t i = 0; i < ncurves; ++i) {
if (strcasecmp(utf_name, OBJ_nid2sn(curves[i].nid)) == 0) {
curve = EC_GROUP_new_by_curve_name(curves[i].nid);
break;
}
}
(*env)->ReleaseStringUTFChars(env, name, utf_name);
if (!curve) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Curve for given bitsize not found.");
return NULL;
}
jobject result = generate_from_curve(env, curve);
EC_GROUP_free(curve);
return result;
} else {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Curve not found.");
return NULL;
}
}
EC_KEY *barray_to_pubkey(JNIEnv *env, const EC_GROUP *curve, jbyteArray pub) {
EC_KEY *result = EC_KEY_new();
EC_KEY_set_group(result, curve);
jsize pub_len = (*env)->GetArrayLength(env, pub);
jbyte *pub_data = (*env)->GetByteArrayElements(env, pub, NULL);
EC_POINT *pub_point = EC_POINT_new(curve);
EC_POINT_oct2point(curve, pub_point, (unsigned char *) pub_data, pub_len, NULL);
(*env)->ReleaseByteArrayElements(env, pub, pub_data, JNI_ABORT);
EC_KEY_set_public_key(result, pub_point);
EC_POINT_free(pub_point);
return result;
}
EC_KEY *barray_to_privkey(JNIEnv *env, const EC_GROUP *curve, jbyteArray priv) {
EC_KEY *result = EC_KEY_new();
EC_KEY_set_group(result, curve);
jsize priv_len = (*env)->GetArrayLength(env, priv);
jbyte *priv_data = (*env)->GetByteArrayElements(env, priv, NULL);
BIGNUM *s = BN_bin2bn((unsigned char *) priv_data, priv_len, NULL);
(*env)->ReleaseByteArrayElements(env, priv, priv_data, JNI_ABORT);
EC_KEY_set_private_key(result, s);
BN_free(s);
return result;
}
JNIEXPORT jbyteArray JNICALL Java_cz_crcs_ectester_standalone_libs_jni_NativeKeyAgreementSpi_00024Openssl_generateSecret___3B_3BLjava_security_spec_ECParameterSpec_2(JNIEnv *env, jobject self, jbyteArray pubkey, jbyteArray privkey, jobject params) {
EC_GROUP *curve = create_curve(env, params);
if (!curve) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Curve not found.");
return NULL;
}
EC_KEY *pub = barray_to_pubkey(env, curve, pubkey);
EC_KEY *priv = barray_to_privkey(env, curve, privkey);
int field_size = EC_GROUP_get_degree(curve);
size_t secret_len = (field_size + 7)/8;
//TODO: Do more KeyAgreements here, but will have to do the hash-fun manually,
// probably using the ECDH_KDF_X9_62 by wrapping it and dynamically choosing the EVP_MD. from the type string.
jbyteArray result = (*env)->NewByteArray(env, secret_len);
jbyte *result_data = (*env)->GetByteArrayElements(env, result, NULL);
native_timing_start();
int err = ECDH_compute_key(result_data, secret_len, EC_KEY_get0_public_key(pub), priv, NULL);
native_timing_stop();
if (err <= 0) {
throw_new(env, "java/security/GeneralSecurityException", "Error computing ECDH, ECDH_compute_key.");
EC_KEY_free(pub); EC_KEY_free(priv); EC_GROUP_free(curve);
(*env)->ReleaseByteArrayElements(env, result, result_data, JNI_ABORT);
return NULL;
}
(*env)->ReleaseByteArrayElements(env, result, result_data, 0);
EC_KEY_free(pub);
EC_KEY_free(priv);
EC_GROUP_free(curve);
return result;
}
JNIEXPORT jobject JNICALL Java_cz_crcs_ectester_standalone_libs_jni_NativeKeyAgreementSpi_00024Openssl_generateSecret___3B_3BLjava_security_spec_ECParameterSpec_2Ljava_lang_String_2(JNIEnv *env, jobject self, jbyteArray pubkey, jbyteArray privkey, jobject params, jstring algorithm) {
throw_new(env, "java/lang/UnsupportedOperationException", "Not supported.");
return NULL;
}
JNIEXPORT jbyteArray JNICALL Java_cz_crcs_ectester_standalone_libs_jni_NativeSignatureSpi_00024Openssl_sign(JNIEnv *env, jobject self, jbyteArray data, jbyteArray privkey, jobject params) {
EC_GROUP *curve = create_curve(env, params);
if (!curve) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Curve not found.");
return NULL;
}
EC_KEY *priv = barray_to_privkey(env, curve, privkey);
jsize data_size = (*env)->GetArrayLength(env, data);
jbyte *data_data = (*env)->GetByteArrayElements(env, data, NULL);
// TODO: Do more Signatures here, maybe use the EVP interface to get to the hashes easier and not hash manually?
native_timing_start();
ECDSA_SIG *signature = ECDSA_do_sign((unsigned char *) data_data, data_size, priv);
native_timing_stop();
(*env)->ReleaseByteArrayElements(env, data, data_data, JNI_ABORT);
if (!signature) {
throw_new(env, "java/security/GeneralSecurityException", "Error signing, ECDSA_do_sign.");
EC_KEY_free(priv); EC_GROUP_free(curve);
return NULL;
}
jsize sig_len = i2d_ECDSA_SIG(signature, NULL);
jbyteArray result = (*env)->NewByteArray(env, sig_len);
jbyte *result_data = (*env)->GetByteArrayElements(env, result, NULL);
jbyte *result_data_ptr = result_data;
i2d_ECDSA_SIG(signature, (unsigned char **)&result_data_ptr);
(*env)->ReleaseByteArrayElements(env, result, result_data, 0);
ECDSA_SIG_free(signature);
EC_KEY_free(priv);
EC_GROUP_free(curve);
return result;
}
JNIEXPORT jboolean JNICALL Java_cz_crcs_ectester_standalone_libs_jni_NativeSignatureSpi_00024Openssl_verify(JNIEnv *env, jobject self, jbyteArray signature, jbyteArray data, jbyteArray pubkey, jobject params) {
EC_GROUP *curve = create_curve(env, params);
if (!curve) {
throw_new(env, "java/security/InvalidAlgorithmParameterException", "Curve not found.");
return JNI_FALSE;
}
EC_KEY *pub = barray_to_pubkey(env, curve, pubkey);
jsize sig_len = (*env)->GetArrayLength(env, signature);
jbyte *sig_data = (*env)->GetByteArrayElements(env, signature, NULL);
jbyte *sig_data_ptr = sig_data;
ECDSA_SIG *sig_obj = d2i_ECDSA_SIG(NULL, (const unsigned char **)&sig_data_ptr, sig_len);
(*env)->ReleaseByteArrayElements(env, signature, sig_data, JNI_ABORT);
jsize data_size = (*env)->GetArrayLength(env, data);
jbyte *data_data = (*env)->GetByteArrayElements(env, data, NULL);
native_timing_start();
int result = ECDSA_do_verify((unsigned char *) data_data, data_size, sig_obj, pub);
native_timing_stop();
(*env)->ReleaseByteArrayElements(env, data, data_data, JNI_ABORT);
if (result < 0) {
throw_new(env, "java/security/GeneralSecurityException", "Error verifying, ECDSA_do_verify.");
EC_KEY_free(pub); EC_GROUP_free(curve); ECDSA_SIG_free(sig_obj);
return JNI_FALSE;
}
ECDSA_SIG_free(sig_obj);
EC_KEY_free(pub);
EC_GROUP_free(curve);
return (result == 1) ? JNI_TRUE : JNI_FALSE;
}