| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "content/child/webcrypto/nss/rsa_key_nss.h" |
| |
| #include "base/logging.h" |
| #include "content/child/webcrypto/crypto_data.h" |
| #include "content/child/webcrypto/generate_key_result.h" |
| #include "content/child/webcrypto/jwk.h" |
| #include "content/child/webcrypto/nss/key_nss.h" |
| #include "content/child/webcrypto/nss/util_nss.h" |
| #include "content/child/webcrypto/status.h" |
| #include "content/child/webcrypto/webcrypto_util.h" |
| #include "crypto/scoped_nss_types.h" |
| #include "third_party/WebKit/public/platform/WebCryptoAlgorithmParams.h" |
| #include "third_party/WebKit/public/platform/WebCryptoKeyAlgorithm.h" |
| |
| namespace content { |
| |
| namespace webcrypto { |
| |
| namespace { |
| |
| #if defined(USE_NSS) && !defined(OS_CHROMEOS) |
| Status ErrorRsaPrivateKeyImportNotSupported() { |
| return Status::ErrorUnsupported( |
| "NSS version must be at least 3.16.2 for RSA private key import. See " |
| "http://crbug.com/380424"); |
| } |
| |
| // Prior to NSS 3.16.2 RSA key parameters were not validated. This is |
| // a security problem for RSA private key import from JWK which uses a |
| // CKA_ID based on the public modulus to retrieve the private key. |
| Status NssSupportsRsaPrivateKeyImport() { |
| if (!NSS_VersionCheck("3.16.2")) |
| return ErrorRsaPrivateKeyImportNotSupported(); |
| |
| // Also ensure that the version of Softoken is 3.16.2 or later. |
| crypto::ScopedPK11Slot slot(PK11_GetInternalSlot()); |
| CK_SLOT_INFO info = {}; |
| if (PK11_GetSlotInfo(slot.get(), &info) != SECSuccess) |
| return ErrorRsaPrivateKeyImportNotSupported(); |
| |
| // CK_SLOT_INFO.hardwareVersion contains the major.minor |
| // version info for Softoken in the corresponding .major/.minor |
| // fields, and .firmwareVersion contains the patch.build |
| // version info (in the .major/.minor fields) |
| if ((info.hardwareVersion.major > 3) || |
| (info.hardwareVersion.major == 3 && |
| (info.hardwareVersion.minor > 16 || |
| (info.hardwareVersion.minor == 16 && |
| info.firmwareVersion.major >= 2)))) { |
| return Status::Success(); |
| } |
| |
| return ErrorRsaPrivateKeyImportNotSupported(); |
| } |
| #else |
| Status NssSupportsRsaPrivateKeyImport() { |
| return Status::Success(); |
| } |
| #endif |
| |
| bool CreateRsaHashedPublicKeyAlgorithm( |
| blink::WebCryptoAlgorithmId rsa_algorithm, |
| blink::WebCryptoAlgorithmId hash_algorithm, |
| SECKEYPublicKey* key, |
| blink::WebCryptoKeyAlgorithm* key_algorithm) { |
| // TODO(eroman): What about other key types rsaPss, rsaOaep. |
| if (!key || key->keyType != rsaKey) |
| return false; |
| |
| unsigned int modulus_length_bits = SECKEY_PublicKeyStrength(key) * 8; |
| CryptoData public_exponent(key->u.rsa.publicExponent.data, |
| key->u.rsa.publicExponent.len); |
| |
| *key_algorithm = blink::WebCryptoKeyAlgorithm::createRsaHashed( |
| rsa_algorithm, |
| modulus_length_bits, |
| public_exponent.bytes(), |
| public_exponent.byte_length(), |
| hash_algorithm); |
| return true; |
| } |
| |
| bool CreateRsaHashedPrivateKeyAlgorithm( |
| blink::WebCryptoAlgorithmId rsa_algorithm, |
| blink::WebCryptoAlgorithmId hash_algorithm, |
| SECKEYPrivateKey* key, |
| blink::WebCryptoKeyAlgorithm* key_algorithm) { |
| crypto::ScopedSECKEYPublicKey public_key(SECKEY_ConvertToPublicKey(key)); |
| if (!public_key) |
| return false; |
| return CreateRsaHashedPublicKeyAlgorithm( |
| rsa_algorithm, hash_algorithm, public_key.get(), key_algorithm); |
| } |
| |
| // From PKCS#1 [http://tools.ietf.org/html/rfc3447]: |
| // |
| // RSAPrivateKey ::= SEQUENCE { |
| // version Version, |
| // modulus INTEGER, -- n |
| // publicExponent INTEGER, -- e |
| // privateExponent INTEGER, -- d |
| // prime1 INTEGER, -- p |
| // prime2 INTEGER, -- q |
| // exponent1 INTEGER, -- d mod (p-1) |
| // exponent2 INTEGER, -- d mod (q-1) |
| // coefficient INTEGER, -- (inverse of q) mod p |
| // otherPrimeInfos OtherPrimeInfos OPTIONAL |
| // } |
| // |
| // Note that otherPrimeInfos is only applicable for version=1. Since NSS |
| // doesn't use multi-prime can safely use version=0. |
| struct RSAPrivateKey { |
| SECItem version; |
| SECItem modulus; |
| SECItem public_exponent; |
| SECItem private_exponent; |
| SECItem prime1; |
| SECItem prime2; |
| SECItem exponent1; |
| SECItem exponent2; |
| SECItem coefficient; |
| }; |
| |
| // The system NSS library doesn't have the new PK11_ExportDERPrivateKeyInfo |
| // function yet (https://bugzilla.mozilla.org/show_bug.cgi?id=519255). So we |
| // provide a fallback implementation. |
| #if defined(USE_NSS) |
| const SEC_ASN1Template RSAPrivateKeyTemplate[] = { |
| {SEC_ASN1_SEQUENCE, 0, NULL, sizeof(RSAPrivateKey)}, |
| {SEC_ASN1_INTEGER, offsetof(RSAPrivateKey, version)}, |
| {SEC_ASN1_INTEGER, offsetof(RSAPrivateKey, modulus)}, |
| {SEC_ASN1_INTEGER, offsetof(RSAPrivateKey, public_exponent)}, |
| {SEC_ASN1_INTEGER, offsetof(RSAPrivateKey, private_exponent)}, |
| {SEC_ASN1_INTEGER, offsetof(RSAPrivateKey, prime1)}, |
| {SEC_ASN1_INTEGER, offsetof(RSAPrivateKey, prime2)}, |
| {SEC_ASN1_INTEGER, offsetof(RSAPrivateKey, exponent1)}, |
| {SEC_ASN1_INTEGER, offsetof(RSAPrivateKey, exponent2)}, |
| {SEC_ASN1_INTEGER, offsetof(RSAPrivateKey, coefficient)}, |
| {0}}; |
| #endif // defined(USE_NSS) |
| |
| // On success |value| will be filled with data which must be freed by |
| // SECITEM_FreeItem(value, PR_FALSE); |
| bool ReadUint(SECKEYPrivateKey* key, |
| CK_ATTRIBUTE_TYPE attribute, |
| SECItem* value) { |
| SECStatus rv = PK11_ReadRawAttribute(PK11_TypePrivKey, key, attribute, value); |
| |
| // PK11_ReadRawAttribute() returns items of type siBuffer. However in order |
| // for the ASN.1 encoding to be correct, the items must be of type |
| // siUnsignedInteger. |
| value->type = siUnsignedInteger; |
| |
| return rv == SECSuccess; |
| } |
| |
| // Fills |out| with the RSA private key properties. Returns true on success. |
| // Regardless of the return value, the caller must invoke FreeRSAPrivateKey() |
| // to free up any allocated memory. |
| // |
| // The passed in RSAPrivateKey must be zero-initialized. |
| bool InitRSAPrivateKey(SECKEYPrivateKey* key, RSAPrivateKey* out) { |
| if (key->keyType != rsaKey) |
| return false; |
| |
| // Everything should be zero-ed out. These are just some spot checks. |
| DCHECK(!out->version.data); |
| DCHECK(!out->version.len); |
| DCHECK(!out->modulus.data); |
| DCHECK(!out->modulus.len); |
| |
| // Always use version=0 since not using multi-prime. |
| if (!SEC_ASN1EncodeInteger(NULL, &out->version, 0)) |
| return false; |
| |
| if (!ReadUint(key, CKA_MODULUS, &out->modulus)) |
| return false; |
| if (!ReadUint(key, CKA_PUBLIC_EXPONENT, &out->public_exponent)) |
| return false; |
| if (!ReadUint(key, CKA_PRIVATE_EXPONENT, &out->private_exponent)) |
| return false; |
| if (!ReadUint(key, CKA_PRIME_1, &out->prime1)) |
| return false; |
| if (!ReadUint(key, CKA_PRIME_2, &out->prime2)) |
| return false; |
| if (!ReadUint(key, CKA_EXPONENT_1, &out->exponent1)) |
| return false; |
| if (!ReadUint(key, CKA_EXPONENT_2, &out->exponent2)) |
| return false; |
| if (!ReadUint(key, CKA_COEFFICIENT, &out->coefficient)) |
| return false; |
| |
| return true; |
| } |
| |
| struct FreeRsaPrivateKey { |
| void operator()(RSAPrivateKey* out) { |
| SECITEM_FreeItem(&out->version, PR_FALSE); |
| SECITEM_FreeItem(&out->modulus, PR_FALSE); |
| SECITEM_FreeItem(&out->public_exponent, PR_FALSE); |
| SECITEM_FreeItem(&out->private_exponent, PR_FALSE); |
| SECITEM_FreeItem(&out->prime1, PR_FALSE); |
| SECITEM_FreeItem(&out->prime2, PR_FALSE); |
| SECITEM_FreeItem(&out->exponent1, PR_FALSE); |
| SECITEM_FreeItem(&out->exponent2, PR_FALSE); |
| SECITEM_FreeItem(&out->coefficient, PR_FALSE); |
| } |
| }; |
| |
| typedef scoped_ptr<CERTSubjectPublicKeyInfo, |
| crypto::NSSDestroyer<CERTSubjectPublicKeyInfo, |
| SECKEY_DestroySubjectPublicKeyInfo> > |
| ScopedCERTSubjectPublicKeyInfo; |
| |
| struct DestroyGenericObject { |
| void operator()(PK11GenericObject* o) const { |
| if (o) |
| PK11_DestroyGenericObject(o); |
| } |
| }; |
| |
| typedef scoped_ptr<PK11GenericObject, DestroyGenericObject> |
| ScopedPK11GenericObject; |
| |
| // Helper to add an attribute to a template. |
| void AddAttribute(CK_ATTRIBUTE_TYPE type, |
| void* value, |
| unsigned long length, |
| std::vector<CK_ATTRIBUTE>* templ) { |
| CK_ATTRIBUTE attribute = {type, value, length}; |
| templ->push_back(attribute); |
| } |
| |
| void AddAttribute(CK_ATTRIBUTE_TYPE type, |
| const CryptoData& data, |
| std::vector<CK_ATTRIBUTE>* templ) { |
| CK_ATTRIBUTE attribute = {type, const_cast<unsigned char*>(data.bytes()), |
| data.byte_length()}; |
| templ->push_back(attribute); |
| } |
| |
| void AddAttribute(CK_ATTRIBUTE_TYPE type, |
| const std::string& data, |
| std::vector<CK_ATTRIBUTE>* templ) { |
| AddAttribute(type, CryptoData(data), templ); |
| } |
| |
| Status ExportKeyPkcs8Nss(SECKEYPrivateKey* key, std::vector<uint8_t>* buffer) { |
| if (key->keyType != rsaKey) |
| return Status::ErrorUnsupported(); |
| |
| // TODO(rsleevi): Implement OAEP support according to the spec. |
| |
| #if defined(USE_NSS) |
| // PK11_ExportDERPrivateKeyInfo isn't available. Use our fallback code. |
| const SECOidTag algorithm = SEC_OID_PKCS1_RSA_ENCRYPTION; |
| const int kPrivateKeyInfoVersion = 0; |
| |
| SECKEYPrivateKeyInfo private_key_info = {}; |
| RSAPrivateKey rsa_private_key = {}; |
| scoped_ptr<RSAPrivateKey, FreeRsaPrivateKey> free_private_key( |
| &rsa_private_key); |
| |
| // http://crbug.com/366427: the spec does not define any other failures for |
| // exporting, so none of the subsequent errors are spec compliant. |
| if (!InitRSAPrivateKey(key, &rsa_private_key)) |
| return Status::OperationError(); |
| |
| crypto::ScopedPLArenaPool arena(PORT_NewArena(DER_DEFAULT_CHUNKSIZE)); |
| if (!arena.get()) |
| return Status::OperationError(); |
| |
| if (!SEC_ASN1EncodeItem(arena.get(), |
| &private_key_info.privateKey, |
| &rsa_private_key, |
| RSAPrivateKeyTemplate)) |
| return Status::OperationError(); |
| |
| if (SECSuccess != |
| SECOID_SetAlgorithmID( |
| arena.get(), &private_key_info.algorithm, algorithm, NULL)) |
| return Status::OperationError(); |
| |
| if (!SEC_ASN1EncodeInteger( |
| arena.get(), &private_key_info.version, kPrivateKeyInfoVersion)) |
| return Status::OperationError(); |
| |
| crypto::ScopedSECItem encoded_key( |
| SEC_ASN1EncodeItem(NULL, |
| NULL, |
| &private_key_info, |
| SEC_ASN1_GET(SECKEY_PrivateKeyInfoTemplate))); |
| #else // defined(USE_NSS) |
| crypto::ScopedSECItem encoded_key(PK11_ExportDERPrivateKeyInfo(key, NULL)); |
| #endif // defined(USE_NSS) |
| |
| if (!encoded_key.get()) |
| return Status::OperationError(); |
| |
| buffer->assign(encoded_key->data, encoded_key->data + encoded_key->len); |
| return Status::Success(); |
| } |
| |
| Status ImportRsaPrivateKey(const blink::WebCryptoAlgorithm& algorithm, |
| bool extractable, |
| blink::WebCryptoKeyUsageMask usages, |
| const JwkRsaInfo& params, |
| blink::WebCryptoKey* key) { |
| Status status = NssSupportsRsaPrivateKeyImport(); |
| if (status.IsError()) |
| return status; |
| |
| CK_OBJECT_CLASS obj_class = CKO_PRIVATE_KEY; |
| CK_KEY_TYPE key_type = CKK_RSA; |
| CK_BBOOL ck_false = CK_FALSE; |
| |
| std::vector<CK_ATTRIBUTE> key_template; |
| |
| AddAttribute(CKA_CLASS, &obj_class, sizeof(obj_class), &key_template); |
| AddAttribute(CKA_KEY_TYPE, &key_type, sizeof(key_type), &key_template); |
| AddAttribute(CKA_TOKEN, &ck_false, sizeof(ck_false), &key_template); |
| AddAttribute(CKA_SENSITIVE, &ck_false, sizeof(ck_false), &key_template); |
| AddAttribute(CKA_PRIVATE, &ck_false, sizeof(ck_false), &key_template); |
| |
| // Required properties by JWA. |
| AddAttribute(CKA_MODULUS, params.n, &key_template); |
| AddAttribute(CKA_PUBLIC_EXPONENT, params.e, &key_template); |
| AddAttribute(CKA_PRIVATE_EXPONENT, params.d, &key_template); |
| |
| // Manufacture a CKA_ID so the created key can be retrieved later as a |
| // SECKEYPrivateKey using FindKeyByKeyID(). Unfortunately there isn't a more |
| // direct way to do this in NSS. |
| // |
| // For consistency with other NSS key creation methods, set the CKA_ID to |
| // PK11_MakeIDFromPubKey(). There are some problems with |
| // this approach: |
| // |
| // (1) Prior to NSS 3.16.2, there is no parameter validation when creating |
| // private keys. It is therefore possible to construct a key using the |
| // known public modulus, and where all the other parameters are bogus. |
| // FindKeyByKeyID() returns the first key matching the ID. So this would |
| // effectively allow an attacker to retrieve a private key of their |
| // choice. |
| // |
| // (2) The ID space is shared by different key types. So theoretically |
| // possible to retrieve a key of the wrong type which has a matching |
| // CKA_ID. In practice I am told this is not likely except for small key |
| // sizes, since would require constructing keys with the same public |
| // data. |
| // |
| // (3) FindKeyByKeyID() doesn't necessarily return the object that was just |
| // created by CreateGenericObject. If the pre-existing key was |
| // provisioned with flags incompatible with WebCrypto (for instance |
| // marked sensitive) then this will break things. |
| SECItem modulus_item = MakeSECItemForBuffer(CryptoData(params.n)); |
| crypto::ScopedSECItem object_id(PK11_MakeIDFromPubKey(&modulus_item)); |
| AddAttribute( |
| CKA_ID, CryptoData(object_id->data, object_id->len), &key_template); |
| |
| // Optional properties by JWA, however guaranteed to be present by Chromium's |
| // implementation. |
| AddAttribute(CKA_PRIME_1, params.p, &key_template); |
| AddAttribute(CKA_PRIME_2, params.q, &key_template); |
| AddAttribute(CKA_EXPONENT_1, params.dp, &key_template); |
| AddAttribute(CKA_EXPONENT_2, params.dq, &key_template); |
| AddAttribute(CKA_COEFFICIENT, params.qi, &key_template); |
| |
| crypto::ScopedPK11Slot slot(PK11_GetInternalSlot()); |
| |
| ScopedPK11GenericObject key_object(PK11_CreateGenericObject( |
| slot.get(), &key_template[0], key_template.size(), PR_FALSE)); |
| |
| if (!key_object) |
| return Status::OperationError(); |
| |
| crypto::ScopedSECKEYPrivateKey private_key_tmp( |
| PK11_FindKeyByKeyID(slot.get(), object_id.get(), NULL)); |
| |
| // PK11_FindKeyByKeyID() may return a handle to an existing key, rather than |
| // the object created by PK11_CreateGenericObject(). |
| crypto::ScopedSECKEYPrivateKey private_key( |
| SECKEY_CopyPrivateKey(private_key_tmp.get())); |
| |
| if (!private_key) |
| return Status::OperationError(); |
| |
| blink::WebCryptoKeyAlgorithm key_algorithm; |
| if (!CreateRsaHashedPrivateKeyAlgorithm( |
| algorithm.id(), |
| algorithm.rsaHashedImportParams()->hash().id(), |
| private_key.get(), |
| &key_algorithm)) { |
| return Status::ErrorUnexpected(); |
| } |
| |
| std::vector<uint8_t> pkcs8_data; |
| status = ExportKeyPkcs8Nss(private_key.get(), &pkcs8_data); |
| if (status.IsError()) |
| return status; |
| |
| scoped_ptr<PrivateKeyNss> key_handle( |
| new PrivateKeyNss(private_key.Pass(), CryptoData(pkcs8_data))); |
| |
| *key = blink::WebCryptoKey::create(key_handle.release(), |
| blink::WebCryptoKeyTypePrivate, |
| extractable, |
| key_algorithm, |
| usages); |
| return Status::Success(); |
| } |
| |
| Status ExportKeySpkiNss(SECKEYPublicKey* key, std::vector<uint8_t>* buffer) { |
| const crypto::ScopedSECItem spki_der( |
| SECKEY_EncodeDERSubjectPublicKeyInfo(key)); |
| if (!spki_der) |
| return Status::OperationError(); |
| |
| buffer->assign(spki_der->data, spki_der->data + spki_der->len); |
| return Status::Success(); |
| } |
| |
| Status ImportRsaPublicKey(const blink::WebCryptoAlgorithm& algorithm, |
| bool extractable, |
| blink::WebCryptoKeyUsageMask usages, |
| const CryptoData& modulus_data, |
| const CryptoData& exponent_data, |
| blink::WebCryptoKey* key) { |
| if (!modulus_data.byte_length()) |
| return Status::ErrorImportRsaEmptyModulus(); |
| |
| if (!exponent_data.byte_length()) |
| return Status::ErrorImportRsaEmptyExponent(); |
| |
| DCHECK(modulus_data.bytes()); |
| DCHECK(exponent_data.bytes()); |
| |
| // NSS does not provide a way to create an RSA public key directly from the |
| // modulus and exponent values, but it can import an DER-encoded ASN.1 blob |
| // with these values and create the public key from that. The code below |
| // follows the recommendation described in |
| // https://developer.mozilla.org/en-US/docs/NSS/NSS_Tech_Notes/nss_tech_note7 |
| |
| // Pack the input values into a struct compatible with NSS ASN.1 encoding, and |
| // set up an ASN.1 encoder template for it. |
| struct RsaPublicKeyData { |
| SECItem modulus; |
| SECItem exponent; |
| }; |
| const RsaPublicKeyData pubkey_in = { |
| {siUnsignedInteger, const_cast<unsigned char*>(modulus_data.bytes()), |
| modulus_data.byte_length()}, |
| {siUnsignedInteger, const_cast<unsigned char*>(exponent_data.bytes()), |
| exponent_data.byte_length()}}; |
| const SEC_ASN1Template rsa_public_key_template[] = { |
| {SEC_ASN1_SEQUENCE, 0, NULL, sizeof(RsaPublicKeyData)}, |
| { |
| SEC_ASN1_INTEGER, offsetof(RsaPublicKeyData, modulus), |
| }, |
| { |
| SEC_ASN1_INTEGER, offsetof(RsaPublicKeyData, exponent), |
| }, |
| { |
| 0, |
| }}; |
| |
| // DER-encode the public key. |
| crypto::ScopedSECItem pubkey_der( |
| SEC_ASN1EncodeItem(NULL, NULL, &pubkey_in, rsa_public_key_template)); |
| if (!pubkey_der) |
| return Status::OperationError(); |
| |
| // Import the DER-encoded public key to create an RSA SECKEYPublicKey. |
| crypto::ScopedSECKEYPublicKey pubkey( |
| SECKEY_ImportDERPublicKey(pubkey_der.get(), CKK_RSA)); |
| if (!pubkey) |
| return Status::OperationError(); |
| |
| blink::WebCryptoKeyAlgorithm key_algorithm; |
| if (!CreateRsaHashedPublicKeyAlgorithm( |
| algorithm.id(), |
| algorithm.rsaHashedImportParams()->hash().id(), |
| pubkey.get(), |
| &key_algorithm)) { |
| return Status::ErrorUnexpected(); |
| } |
| |
| std::vector<uint8_t> spki_data; |
| Status status = ExportKeySpkiNss(pubkey.get(), &spki_data); |
| if (status.IsError()) |
| return status; |
| |
| scoped_ptr<PublicKeyNss> key_handle( |
| new PublicKeyNss(pubkey.Pass(), CryptoData(spki_data))); |
| |
| *key = blink::WebCryptoKey::create(key_handle.release(), |
| blink::WebCryptoKeyTypePublic, |
| extractable, |
| key_algorithm, |
| usages); |
| return Status::Success(); |
| } |
| |
| } // namespace |
| |
| Status RsaHashedAlgorithm::GenerateKey( |
| const blink::WebCryptoAlgorithm& algorithm, |
| bool extractable, |
| blink::WebCryptoKeyUsageMask combined_usages, |
| GenerateKeyResult* result) const { |
| Status status = CheckKeyCreationUsages( |
| all_public_key_usages_ | all_private_key_usages_, combined_usages); |
| if (status.IsError()) |
| return status; |
| |
| const blink::WebCryptoKeyUsageMask public_usages = |
| combined_usages & all_public_key_usages_; |
| const blink::WebCryptoKeyUsageMask private_usages = |
| combined_usages & all_private_key_usages_; |
| |
| unsigned int public_exponent = 0; |
| unsigned int modulus_length_bits = 0; |
| status = GetRsaKeyGenParameters(algorithm.rsaHashedKeyGenParams(), |
| &public_exponent, |
| &modulus_length_bits); |
| if (status.IsError()) |
| return status; |
| |
| crypto::ScopedPK11Slot slot(PK11_GetInternalKeySlot()); |
| if (!slot) |
| return Status::OperationError(); |
| |
| PK11RSAGenParams rsa_gen_params; |
| rsa_gen_params.keySizeInBits = modulus_length_bits; |
| rsa_gen_params.pe = public_exponent; |
| |
| const CK_FLAGS operation_flags_mask = |
| CKF_ENCRYPT | CKF_DECRYPT | CKF_SIGN | CKF_VERIFY | CKF_WRAP | CKF_UNWRAP; |
| |
| // The private key must be marked as insensitive and extractable, otherwise it |
| // cannot later be exported in unencrypted form or structured-cloned. |
| const PK11AttrFlags attribute_flags = |
| PK11_ATTR_INSENSITIVE | PK11_ATTR_EXTRACTABLE; |
| |
| // Note: NSS does not generate an sec_public_key if the call below fails, |
| // so there is no danger of a leaked sec_public_key. |
| SECKEYPublicKey* sec_public_key; |
| crypto::ScopedSECKEYPrivateKey scoped_sec_private_key( |
| PK11_GenerateKeyPairWithOpFlags(slot.get(), |
| CKM_RSA_PKCS_KEY_PAIR_GEN, |
| &rsa_gen_params, |
| &sec_public_key, |
| attribute_flags, |
| generate_flags_, |
| operation_flags_mask, |
| NULL)); |
| if (!scoped_sec_private_key) |
| return Status::OperationError(); |
| |
| blink::WebCryptoKeyAlgorithm key_algorithm; |
| if (!CreateRsaHashedPublicKeyAlgorithm( |
| algorithm.id(), |
| algorithm.rsaHashedKeyGenParams()->hash().id(), |
| sec_public_key, |
| &key_algorithm)) { |
| return Status::ErrorUnexpected(); |
| } |
| |
| std::vector<uint8_t> spki_data; |
| status = ExportKeySpkiNss(sec_public_key, &spki_data); |
| if (status.IsError()) |
| return status; |
| |
| scoped_ptr<PublicKeyNss> public_key_handle(new PublicKeyNss( |
| crypto::ScopedSECKEYPublicKey(sec_public_key), CryptoData(spki_data))); |
| |
| std::vector<uint8_t> pkcs8_data; |
| status = ExportKeyPkcs8Nss(scoped_sec_private_key.get(), &pkcs8_data); |
| if (status.IsError()) |
| return status; |
| |
| scoped_ptr<PrivateKeyNss> private_key_handle( |
| new PrivateKeyNss(scoped_sec_private_key.Pass(), CryptoData(pkcs8_data))); |
| |
| blink::WebCryptoKey public_key = |
| blink::WebCryptoKey::create(public_key_handle.release(), |
| blink::WebCryptoKeyTypePublic, |
| true, |
| key_algorithm, |
| public_usages); |
| |
| blink::WebCryptoKey private_key = |
| blink::WebCryptoKey::create(private_key_handle.release(), |
| blink::WebCryptoKeyTypePrivate, |
| extractable, |
| key_algorithm, |
| private_usages); |
| |
| result->AssignKeyPair(public_key, private_key); |
| return Status::Success(); |
| } |
| |
| Status RsaHashedAlgorithm::VerifyKeyUsagesBeforeImportKey( |
| blink::WebCryptoKeyFormat format, |
| blink::WebCryptoKeyUsageMask usages) const { |
| switch (format) { |
| case blink::WebCryptoKeyFormatSpki: |
| return CheckKeyCreationUsages(all_public_key_usages_, usages); |
| case blink::WebCryptoKeyFormatPkcs8: |
| return CheckKeyCreationUsages(all_private_key_usages_, usages); |
| case blink::WebCryptoKeyFormatJwk: |
| return CheckKeyCreationUsages( |
| all_public_key_usages_ | all_private_key_usages_, usages); |
| default: |
| return Status::ErrorUnsupportedImportKeyFormat(); |
| } |
| } |
| |
| Status RsaHashedAlgorithm::ImportKeyPkcs8( |
| const CryptoData& key_data, |
| const blink::WebCryptoAlgorithm& algorithm, |
| bool extractable, |
| blink::WebCryptoKeyUsageMask usages, |
| blink::WebCryptoKey* key) const { |
| Status status = NssSupportsRsaPrivateKeyImport(); |
| if (status.IsError()) |
| return status; |
| |
| if (!key_data.byte_length()) |
| return Status::ErrorImportEmptyKeyData(); |
| |
| // The binary blob 'key_data' is expected to be a DER-encoded ASN.1 PKCS#8 |
| // private key info object. |
| SECItem pki_der = MakeSECItemForBuffer(key_data); |
| |
| SECKEYPrivateKey* seckey_private_key = NULL; |
| crypto::ScopedPK11Slot slot(PK11_GetInternalSlot()); |
| if (PK11_ImportDERPrivateKeyInfoAndReturnKey(slot.get(), |
| &pki_der, |
| NULL, // nickname |
| NULL, // publicValue |
| false, // isPerm |
| false, // isPrivate |
| KU_ALL, // usage |
| &seckey_private_key, |
| NULL) != SECSuccess) { |
| return Status::DataError(); |
| } |
| DCHECK(seckey_private_key); |
| crypto::ScopedSECKEYPrivateKey private_key(seckey_private_key); |
| |
| const KeyType sec_key_type = SECKEY_GetPrivateKeyType(private_key.get()); |
| if (sec_key_type != rsaKey) |
| return Status::DataError(); |
| |
| blink::WebCryptoKeyAlgorithm key_algorithm; |
| if (!CreateRsaHashedPrivateKeyAlgorithm( |
| algorithm.id(), |
| algorithm.rsaHashedImportParams()->hash().id(), |
| private_key.get(), |
| &key_algorithm)) { |
| return Status::ErrorUnexpected(); |
| } |
| |
| // TODO(eroman): This is probably going to be the same as the input. |
| std::vector<uint8_t> pkcs8_data; |
| status = ExportKeyPkcs8Nss(private_key.get(), &pkcs8_data); |
| if (status.IsError()) |
| return status; |
| |
| scoped_ptr<PrivateKeyNss> key_handle( |
| new PrivateKeyNss(private_key.Pass(), CryptoData(pkcs8_data))); |
| |
| *key = blink::WebCryptoKey::create(key_handle.release(), |
| blink::WebCryptoKeyTypePrivate, |
| extractable, |
| key_algorithm, |
| usages); |
| |
| return Status::Success(); |
| } |
| |
| Status RsaHashedAlgorithm::ImportKeySpki( |
| const CryptoData& key_data, |
| const blink::WebCryptoAlgorithm& algorithm, |
| bool extractable, |
| blink::WebCryptoKeyUsageMask usages, |
| blink::WebCryptoKey* key) const { |
| if (!key_data.byte_length()) |
| return Status::ErrorImportEmptyKeyData(); |
| |
| // The binary blob 'key_data' is expected to be a DER-encoded ASN.1 Subject |
| // Public Key Info. Decode this to a CERTSubjectPublicKeyInfo. |
| SECItem spki_item = MakeSECItemForBuffer(key_data); |
| const ScopedCERTSubjectPublicKeyInfo spki( |
| SECKEY_DecodeDERSubjectPublicKeyInfo(&spki_item)); |
| if (!spki) |
| return Status::DataError(); |
| |
| crypto::ScopedSECKEYPublicKey sec_public_key( |
| SECKEY_ExtractPublicKey(spki.get())); |
| if (!sec_public_key) |
| return Status::DataError(); |
| |
| const KeyType sec_key_type = SECKEY_GetPublicKeyType(sec_public_key.get()); |
| if (sec_key_type != rsaKey) |
| return Status::DataError(); |
| |
| blink::WebCryptoKeyAlgorithm key_algorithm; |
| if (!CreateRsaHashedPublicKeyAlgorithm( |
| algorithm.id(), |
| algorithm.rsaHashedImportParams()->hash().id(), |
| sec_public_key.get(), |
| &key_algorithm)) { |
| return Status::ErrorUnexpected(); |
| } |
| |
| // TODO(eroman): This is probably going to be the same as the input. |
| std::vector<uint8_t> spki_data; |
| Status status = ExportKeySpkiNss(sec_public_key.get(), &spki_data); |
| if (status.IsError()) |
| return status; |
| |
| scoped_ptr<PublicKeyNss> key_handle( |
| new PublicKeyNss(sec_public_key.Pass(), CryptoData(spki_data))); |
| |
| *key = blink::WebCryptoKey::create(key_handle.release(), |
| blink::WebCryptoKeyTypePublic, |
| extractable, |
| key_algorithm, |
| usages); |
| |
| return Status::Success(); |
| } |
| |
| Status RsaHashedAlgorithm::ExportKeyPkcs8(const blink::WebCryptoKey& key, |
| std::vector<uint8_t>* buffer) const { |
| if (key.type() != blink::WebCryptoKeyTypePrivate) |
| return Status::ErrorUnexpectedKeyType(); |
| *buffer = PrivateKeyNss::Cast(key)->pkcs8_data(); |
| return Status::Success(); |
| } |
| |
| Status RsaHashedAlgorithm::ExportKeySpki(const blink::WebCryptoKey& key, |
| std::vector<uint8_t>* buffer) const { |
| if (key.type() != blink::WebCryptoKeyTypePublic) |
| return Status::ErrorUnexpectedKeyType(); |
| *buffer = PublicKeyNss::Cast(key)->spki_data(); |
| return Status::Success(); |
| } |
| |
| Status RsaHashedAlgorithm::ImportKeyJwk( |
| const CryptoData& key_data, |
| const blink::WebCryptoAlgorithm& algorithm, |
| bool extractable, |
| blink::WebCryptoKeyUsageMask usages, |
| blink::WebCryptoKey* key) const { |
| const char* jwk_algorithm = |
| GetJwkAlgorithm(algorithm.rsaHashedImportParams()->hash().id()); |
| |
| if (!jwk_algorithm) |
| return Status::ErrorUnexpected(); |
| |
| JwkRsaInfo jwk; |
| Status status = |
| ReadRsaKeyJwk(key_data, jwk_algorithm, extractable, usages, &jwk); |
| if (status.IsError()) |
| return status; |
| |
| // Once the key type is known, verify the usages. |
| status = CheckKeyCreationUsages( |
| jwk.is_private_key ? all_private_key_usages_ : all_public_key_usages_, |
| usages); |
| if (status.IsError()) |
| return Status::ErrorCreateKeyBadUsages(); |
| |
| return jwk.is_private_key |
| ? ImportRsaPrivateKey(algorithm, extractable, usages, jwk, key) |
| : ImportRsaPublicKey(algorithm, |
| extractable, |
| usages, |
| CryptoData(jwk.n), |
| CryptoData(jwk.e), |
| key); |
| } |
| |
| Status RsaHashedAlgorithm::ExportKeyJwk(const blink::WebCryptoKey& key, |
| std::vector<uint8_t>* buffer) const { |
| const char* jwk_algorithm = |
| GetJwkAlgorithm(key.algorithm().rsaHashedParams()->hash().id()); |
| |
| if (!jwk_algorithm) |
| return Status::ErrorUnexpected(); |
| |
| switch (key.type()) { |
| case blink::WebCryptoKeyTypePublic: { |
| SECKEYPublicKey* nss_key = PublicKeyNss::Cast(key)->key(); |
| if (nss_key->keyType != rsaKey) |
| return Status::ErrorUnsupported(); |
| |
| WriteRsaPublicKeyJwk(SECItemToCryptoData(nss_key->u.rsa.modulus), |
| SECItemToCryptoData(nss_key->u.rsa.publicExponent), |
| jwk_algorithm, |
| key.extractable(), |
| key.usages(), |
| buffer); |
| |
| return Status::Success(); |
| } |
| |
| case blink::WebCryptoKeyTypePrivate: { |
| SECKEYPrivateKey* nss_key = PrivateKeyNss::Cast(key)->key(); |
| RSAPrivateKey key_props = {}; |
| scoped_ptr<RSAPrivateKey, FreeRsaPrivateKey> free_private_key(&key_props); |
| |
| if (!InitRSAPrivateKey(nss_key, &key_props)) |
| return Status::OperationError(); |
| |
| WriteRsaPrivateKeyJwk(SECItemToCryptoData(key_props.modulus), |
| SECItemToCryptoData(key_props.public_exponent), |
| SECItemToCryptoData(key_props.private_exponent), |
| SECItemToCryptoData(key_props.prime1), |
| SECItemToCryptoData(key_props.prime2), |
| SECItemToCryptoData(key_props.exponent1), |
| SECItemToCryptoData(key_props.exponent2), |
| SECItemToCryptoData(key_props.coefficient), |
| jwk_algorithm, |
| key.extractable(), |
| key.usages(), |
| buffer); |
| |
| return Status::Success(); |
| } |
| default: |
| return Status::ErrorUnexpected(); |
| } |
| } |
| |
| } // namespace webcrypto |
| |
| } // namespace content |
