diff options
Diffstat (limited to 'src/cz/crcs/ectester/standalone/libs/jni/boringssl.c')
| -rw-r--r-- | src/cz/crcs/ectester/standalone/libs/jni/boringssl.c | 504 |
1 files changed, 504 insertions, 0 deletions
diff --git a/src/cz/crcs/ectester/standalone/libs/jni/boringssl.c b/src/cz/crcs/ectester/standalone/libs/jni/boringssl.c new file mode 100644 index 0000000..0353741 --- /dev/null +++ b/src/cz/crcs/ectester/standalone/libs/jni/boringssl.c @@ -0,0 +1,504 @@ +#include "native.h" +#include <string.h> +#include <stdio.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/ecdh.h> +#include <openssl/ecdsa.h> + +#include "c_utils.h" + + +static jclass provider_class; + +JNIEXPORT jobject JNICALL Java_cz_crcs_ectester_standalone_libs_BoringsslLib_createProvider(JNIEnv *env, jobject self) { + /* Create the custom provider. */ + jclass local_provider_class = (*env)->FindClass(env, "cz/crcs/ectester/standalone/libs/jni/NativeProvider$Boringssl"); + 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_00024Boringssl_setup(JNIEnv *env, jobject self) { + ERR_load_crypto_strings(); + CRYPTO_library_init(); + + INIT_PROVIDER(env, provider_class); + + ADD_KPG(env, self, "EC", "Boringssl"); + ADD_KA(env, self, "ECDH", "BoringsslECDH"); + ADD_SIG(env, self, "NONEwithECDSA", "BoringsslECDSAwithNONE"); + + init_classes(env, "Boringssl"); +} + +JNIEXPORT jobject JNICALL Java_cz_crcs_ectester_standalone_libs_BoringsslLib_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_00024Boringssl_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_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, 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(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); + + if ((*env)->IsInstanceOf(env, field, f2m_field_class)) { + return NULL; + } + + jmethodID get_bits = (*env)->GetMethodID(env, fp_field_class, "getFieldSize", "()I"); + jint bits = (*env)->CallIntMethod(env, field, get_bits); + jint bytes = (bits + 7) / 8; + + 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; + + 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); + BN_free(a_bn); + BN_free(b_bn); + + if (!result) { + throw_new(env, "java/security/InvalidAlgorithmParameterException", "Error creating EC_GROUP, EC_GROUP_new_curve_GFp."); + 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(gx_bn); BN_free(gy_bn); EC_POINT_free(g_point); EC_GROUP_free(result); + return NULL; + } + + 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_00024Boringssl_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 = !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); + 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; + + 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; + } + + 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); + fflush(stderr); + + 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)); + BIGNUM *h = BN_new(); + EC_GROUP_get_cofactor(curve, h, NULL); + jint cofactor = BN_get_word(h); + BN_free(h); + + 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); + if (!EC_KEY_generate_key(key)) { + 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_bn2bin_padded(key_priv, key_bytes, EC_KEY_get0_private_key(key)); + (*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, 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_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_00024Boringssl_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_00024Boringssl_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; + 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, 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(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_00024Boringssl_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); + if (ECDH_compute_key(result_data, secret_len, EC_KEY_get0_public_key(pub), priv, NULL) <= 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_00024Boringssl_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_00024Boringssl_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? + ECDSA_SIG *signature = ECDSA_do_sign(data_data, data_size, priv); + (*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_00024Boringssl_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); + int result = ECDSA_do_verify(data_data, data_size, sig_obj, pub); + 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); + (*env)->ReleaseByteArrayElements(env, data, data_data, JNI_ABORT); + return JNI_FALSE; + } + (*env)->ReleaseByteArrayElements(env, data, data_data, JNI_ABORT); + + ECDSA_SIG_free(sig_obj); + EC_KEY_free(pub); + EC_GROUP_free(curve); + return (result == 1) ? JNI_TRUE : JNI_FALSE; +} |