| // Copyright 2012 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // Utilities for converting SSL certificates using OpenSSL functions. |
| |
| #include "polo/util/certificateutil.h" |
| |
| #include <glog/logging.h> |
| |
| namespace polo { |
| namespace util { |
| |
| X509* CertificateUtil::X509FromPEM(std::string pem) { |
| BIO* bio = BIO_new_mem_buf(&pem[0], pem.size()); |
| X509* x509 = PEM_read_bio_X509(bio, NULL, 0, NULL); |
| BIO_free(bio); |
| |
| // Ensure that the certificate is not expired. |
| if (X509_cmp_current_time(X509_get_notBefore(x509)) > 0 |
| || X509_cmp_current_time(X509_get_notAfter(x509)) < 0) { |
| LOG(ERROR) << "Expired certificate"; |
| X509_free(x509); |
| return NULL; |
| } |
| |
| return x509; |
| } |
| |
| std::string CertificateUtil::X509ToPEM(X509* x509) { |
| BIO* bio = BIO_new(BIO_s_mem()); |
| PEM_write_bio_X509(bio, x509); |
| BIO_flush(bio); |
| |
| char* data = NULL; |
| size_t data_size = BIO_get_mem_data(bio, &data); |
| |
| std::string pem(data, data_size); |
| BIO_free(bio); |
| |
| return pem; |
| } |
| |
| EVP_PKEY* CertificateUtil::PKEYFromPEM(std::string pem, |
| std::string passphrase) { |
| BIO* bio = BIO_new_mem_buf(&pem[0], pem.size()); |
| EVP_PKEY* pkey = PEM_read_bio_PrivateKey(bio, NULL, 0, &passphrase[0]); |
| BIO_free(bio); |
| |
| return pkey; |
| } |
| |
| std::string CertificateUtil::PKEYToPEM(EVP_PKEY* pkey, |
| std::string passphrase) { |
| BIO* bio = BIO_new(BIO_s_mem()); |
| PEM_write_bio_PrivateKey(bio, pkey, EVP_des_ede3_cbc(), NULL, 0, 0, |
| &passphrase[0]); |
| BIO_flush(bio); |
| |
| char* data = NULL; |
| int data_size = BIO_get_mem_data(bio, &data); |
| |
| std::string pem(data, data_size); |
| BIO_free(bio); |
| |
| return pem; |
| } |
| |
| EVP_PKEY* CertificateUtil::GeneratePrivateKey() { |
| EVP_PKEY* pkey = EVP_PKEY_new(); |
| RSA* rsa = RSA_generate_key(1025, RSA_F4, NULL, NULL); |
| EVP_PKEY_assign_RSA(pkey, rsa); |
| return pkey; |
| } |
| |
| X509* CertificateUtil::GenerateSelfSignedCert(EVP_PKEY* pkey, |
| std::string subject_name, |
| uint32_t days) { |
| X509* x509 = X509_new(); |
| X509_set_version(x509, 2); |
| ASN1_INTEGER_set(X509_get_serialNumber(x509), 0); |
| X509_gmtime_adj(X509_get_notBefore(x509), 0); |
| X509_gmtime_adj(X509_get_notAfter(x509), (int64_t) 60 * 60 * 24 * days); |
| X509_set_pubkey(x509, pkey); |
| |
| X509_NAME* name = X509_get_subject_name(x509); |
| X509_NAME_add_entry_by_NID(name, NID_commonName, MBSTRING_ASC, |
| (unsigned char*) &subject_name[0], -1, -1, 0); |
| |
| X509_set_issuer_name(x509, name); |
| X509_sign(x509, pkey, EVP_sha256()); |
| |
| return x509; |
| } |
| |
| } // namespace util |
| } // namespace polo |