Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 1 | // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "crypto/rsa_private_key.h" |
| 6 | |
| 7 | #include <openssl/evp.h> |
| 8 | #include <openssl/pkcs12.h> |
| 9 | #include <openssl/rsa.h> |
| 10 | |
| 11 | #include "base/logging.h" |
| 12 | #include "base/memory/scoped_ptr.h" |
| 13 | #include "crypto/openssl_util.h" |
| 14 | |
| 15 | namespace crypto { |
| 16 | |
| 17 | namespace { |
| 18 | |
| 19 | // Function pointer definition, for injecting the required key export function |
| 20 | // into ExportKey, below. The supplied function should export EVP_PKEY into |
| 21 | // the supplied BIO, returning 1 on success or 0 on failure. |
| 22 | typedef int (ExportFunction)(BIO*, EVP_PKEY*); |
| 23 | |
| 24 | // Helper to export |key| into |output| via the specified ExportFunction. |
| 25 | bool ExportKey(EVP_PKEY* key, |
| 26 | ExportFunction export_fn, |
| 27 | std::vector<uint8>* output) { |
| 28 | if (!key) |
| 29 | return false; |
| 30 | |
| 31 | OpenSSLErrStackTracer err_tracer(FROM_HERE); |
| 32 | ScopedOpenSSL<BIO, BIO_free_all> bio(BIO_new(BIO_s_mem())); |
| 33 | |
| 34 | int res = export_fn(bio.get(), key); |
| 35 | if (!res) |
| 36 | return false; |
| 37 | |
| 38 | char* data = NULL; |
| 39 | long len = BIO_get_mem_data(bio.get(), &data); |
| 40 | if (!data || len < 0) |
| 41 | return false; |
| 42 | |
| 43 | output->assign(data, data + len); |
| 44 | return true; |
| 45 | } |
| 46 | |
| 47 | } // namespace |
| 48 | |
| 49 | // static |
| 50 | RSAPrivateKey* RSAPrivateKey::Create(uint16 num_bits) { |
| 51 | OpenSSLErrStackTracer err_tracer(FROM_HERE); |
| 52 | |
| 53 | ScopedOpenSSL<RSA, RSA_free> rsa_key(RSA_new()); |
| 54 | ScopedOpenSSL<BIGNUM, BN_free> bn(BN_new()); |
| 55 | if (!rsa_key.get() || !bn.get() || !BN_set_word(bn.get(), 65537L)) |
| 56 | return NULL; |
| 57 | |
| 58 | if (!RSA_generate_key_ex(rsa_key.get(), num_bits, bn.get(), NULL)) |
| 59 | return NULL; |
| 60 | |
| 61 | scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey); |
| 62 | result->key_ = EVP_PKEY_new(); |
| 63 | if (!result->key_ || !EVP_PKEY_set1_RSA(result->key_, rsa_key.get())) |
| 64 | return NULL; |
| 65 | |
| 66 | return result.release(); |
| 67 | } |
| 68 | |
| 69 | // static |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 70 | RSAPrivateKey* RSAPrivateKey::CreateFromPrivateKeyInfo( |
| 71 | const std::vector<uint8>& input) { |
| 72 | if (input.empty()) |
| 73 | return NULL; |
| 74 | |
| 75 | OpenSSLErrStackTracer err_tracer(FROM_HERE); |
| 76 | // BIO_new_mem_buf is not const aware, but it does not modify the buffer. |
| 77 | char* data = reinterpret_cast<char*>(const_cast<uint8*>(&input[0])); |
| 78 | ScopedOpenSSL<BIO, BIO_free_all> bio(BIO_new_mem_buf(data, input.size())); |
| 79 | if (!bio.get()) |
| 80 | return NULL; |
| 81 | |
| 82 | // Importing is a little more involved than exporting, as we must first |
| 83 | // PKCS#8 decode the input, and then import the EVP_PKEY from Private Key |
| 84 | // Info structure returned. |
| 85 | ScopedOpenSSL<PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO_free> p8inf( |
| 86 | d2i_PKCS8_PRIV_KEY_INFO_bio(bio.get(), NULL)); |
| 87 | if (!p8inf.get()) |
| 88 | return NULL; |
| 89 | |
| 90 | scoped_ptr<RSAPrivateKey> result(new RSAPrivateKey); |
| 91 | result->key_ = EVP_PKCS82PKEY(p8inf.get()); |
| 92 | if (!result->key_) |
| 93 | return NULL; |
| 94 | |
| 95 | return result.release(); |
| 96 | } |
| 97 | |
Torne (Richard Coles) | 5821806 | 2012-11-14 11:43:16 +0000 | [diff] [blame] | 98 | RSAPrivateKey::RSAPrivateKey() |
| 99 | : key_(NULL) { |
| 100 | } |
| 101 | |
| 102 | RSAPrivateKey::~RSAPrivateKey() { |
| 103 | if (key_) |
| 104 | EVP_PKEY_free(key_); |
| 105 | } |
| 106 | |
| 107 | RSAPrivateKey* RSAPrivateKey::Copy() const { |
| 108 | scoped_ptr<RSAPrivateKey> copy(new RSAPrivateKey()); |
| 109 | RSA* rsa = EVP_PKEY_get1_RSA(key_); |
| 110 | if (!rsa) |
| 111 | return NULL; |
| 112 | copy->key_ = EVP_PKEY_new(); |
| 113 | if (!EVP_PKEY_set1_RSA(copy->key_, rsa)) |
| 114 | return NULL; |
| 115 | return copy.release(); |
| 116 | } |
| 117 | |
| 118 | bool RSAPrivateKey::ExportPrivateKey(std::vector<uint8>* output) const { |
| 119 | return ExportKey(key_, i2d_PKCS8PrivateKeyInfo_bio, output); |
| 120 | } |
| 121 | |
| 122 | bool RSAPrivateKey::ExportPublicKey(std::vector<uint8>* output) const { |
| 123 | return ExportKey(key_, i2d_PUBKEY_bio, output); |
| 124 | } |
| 125 | |
| 126 | } // namespace crypto |