Revert "Cut down /crypto and switch what is left of it to boringssl."

crypto/ec_private_key_openssl.cc

+// Copyright (c) 2012 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 "crypto/ec_private_key.h"
+
+#include <openssl/ec.h>
+#include <openssl/evp.h>
+#include <openssl/pkcs12.h>
+#include <openssl/x509.h>
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "crypto/openssl_util.h"
+#include "crypto/scoped_openssl_types.h"
+
+namespace crypto {
+
+namespace {
+
+// Function pointer definition, for injecting the required key export function
+// into ExportKeyWithBio, below. |bio| is a temporary memory BIO object, and
+// |key| is a handle to the input key object. Return 1 on success, 0 otherwise.
+// NOTE: Used with OpenSSL functions, which do not comply with the Chromium
+//       style guide, hence the unusual parameter placement / types.
+typedef int (*ExportBioFunction)(BIO* bio, const void* key);
+
+typedef ScopedOpenSSL<PKCS8_PRIV_KEY_INFO, PKCS8_PRIV_KEY_INFO_free>::Type
+    ScopedPKCS8_PRIV_KEY_INFO;
+typedef ScopedOpenSSL<X509_SIG, X509_SIG_free>::Type ScopedX509_SIG;
+
+// Helper to export |key| into |output| via the specified ExportBioFunction.
+bool ExportKeyWithBio(const void* key,
+                      ExportBioFunction export_fn,
+                      std::vector<uint8>* output) {
+  if (!key)
+    return false;
+
+  ScopedBIO bio(BIO_new(BIO_s_mem()));
+  if (!bio.get())
+    return false;
+
+  if (!export_fn(bio.get(), key))
+    return false;
+
+  char* data = NULL;
+  long len = BIO_get_mem_data(bio.get(), &data);
+  if (!data || len < 0)
+    return false;
+
+  output->assign(data, data + len);
+  return true;
+}
+
+// Function pointer definition, for injecting the required key export function
+// into ExportKey below. |key| is a pointer to the input key object,
+// and |data| is either NULL, or the address of an 'unsigned char*' pointer
+// that points to the start of the output buffer. The function must return
+// the number of bytes required to export the data, or -1 in case of error.
+typedef int (*ExportDataFunction)(const void* key, unsigned char** data);
+
+// Helper to export |key| into |output| via the specified export function.
+bool ExportKey(const void* key,
+               ExportDataFunction export_fn,
+               std::vector<uint8>* output) {
+  if (!key)
+    return false;
+
+  int data_len = export_fn(key, NULL);
+  if (data_len < 0)
+    return false;
+
+  output->resize(static_cast<size_t>(data_len));
+  unsigned char* data = &(*output)[0];
+  if (export_fn(key, &data) < 0)
+    return false;
+
+  return true;
+}
+
+}  // namespace
+
+ECPrivateKey::~ECPrivateKey() {
+  if (key_)
+    EVP_PKEY_free(key_);
+}
+
+// static
+bool ECPrivateKey::IsSupported() { return true; }
+
+// static
+ECPrivateKey* ECPrivateKey::Create() {
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
+
+  ScopedEC_KEY ec_key(EC_KEY_new_by_curve_name(NID_X9_62_prime256v1));
+  if (!ec_key.get() || !EC_KEY_generate_key(ec_key.get()))
+    return NULL;
+
+  scoped_ptr<ECPrivateKey> result(new ECPrivateKey());
+  result->key_ = EVP_PKEY_new();
+  if (!result->key_ || !EVP_PKEY_set1_EC_KEY(result->key_, ec_key.get()))
+    return NULL;
+
+  CHECK_EQ(EVP_PKEY_EC, EVP_PKEY_type(result->key_->type));
+  return result.release();
+}
+
+// static
+ECPrivateKey* ECPrivateKey::CreateFromEncryptedPrivateKeyInfo(
+    const std::string& password,
+    const std::vector<uint8>& encrypted_private_key_info,
+    const std::vector<uint8>& subject_public_key_info) {
+  // NOTE: The |subject_public_key_info| can be ignored here, it is only
+  // useful for the NSS implementation (which uses the public key's SHA1
+  // as a lookup key when storing the private one in its store).
+  if (encrypted_private_key_info.empty())
+    return NULL;
+
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
+
+  const uint8_t* data = &encrypted_private_key_info[0];
+  const uint8_t* ptr = data;
+  ScopedX509_SIG p8_encrypted(
+      d2i_X509_SIG(NULL, &ptr, encrypted_private_key_info.size()));
+  if (!p8_encrypted || ptr != data + encrypted_private_key_info.size())
+    return NULL;
+
+  ScopedPKCS8_PRIV_KEY_INFO p8_decrypted;
+  if (password.empty()) {
+    // Hack for reading keys generated by an older version of the OpenSSL
+    // code. OpenSSL used to use "\0\0" rather than the empty string because it
+    // would treat the password as an ASCII string to be converted to UCS-2
+    // while NSS used a byte string.
+    p8_decrypted.reset(PKCS8_decrypt_pbe(
+        p8_encrypted.get(), reinterpret_cast<const uint8_t*>("\0\0"), 2));
+  }
+  if (!p8_decrypted) {
+    p8_decrypted.reset(PKCS8_decrypt_pbe(
+        p8_encrypted.get(),
+        reinterpret_cast<const uint8_t*>(password.data()),
+        password.size()));
+  }
+
+  if (!p8_decrypted)
+    return NULL;
+
+  // Create a new EVP_PKEY for it.
+  scoped_ptr<ECPrivateKey> result(new ECPrivateKey);
+  result->key_ = EVP_PKCS82PKEY(p8_decrypted.get());
+  if (!result->key_ || EVP_PKEY_type(result->key_->type) != EVP_PKEY_EC)
+    return NULL;
+
+  return result.release();
+}
+
+bool ECPrivateKey::ExportEncryptedPrivateKey(
+    const std::string& password,
+    int iterations,
+    std::vector<uint8>* output) {
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
+  // Convert into a PKCS#8 object.
+  ScopedPKCS8_PRIV_KEY_INFO pkcs8(EVP_PKEY2PKCS8(key_));
+  if (!pkcs8.get())
+    return false;
+
+  // Encrypt the object.
+  // NOTE: NSS uses SEC_OID_PKCS12_V2_PBE_WITH_SHA1_AND_3KEY_TRIPLE_DES_CBC
+  // so use NID_pbe_WithSHA1And3_Key_TripleDES_CBC which should be the OpenSSL
+  // equivalent.
+  ScopedX509_SIG encrypted(PKCS8_encrypt_pbe(
+      NID_pbe_WithSHA1And3_Key_TripleDES_CBC,
+      reinterpret_cast<const uint8_t*>(password.data()),
+      password.size(),
+      NULL,
+      0,
+      iterations,
+      pkcs8.get()));
+  if (!encrypted.get())
+    return false;
+
+  // Write it into |*output|
+  return ExportKeyWithBio(encrypted.get(),
+                          reinterpret_cast<ExportBioFunction>(i2d_PKCS8_bio),
+                          output);
+}
+
+bool ECPrivateKey::ExportPublicKey(std::vector<uint8>* output) {
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
+  return ExportKeyWithBio(
+      key_, reinterpret_cast<ExportBioFunction>(i2d_PUBKEY_bio), output);
+}
+
+bool ECPrivateKey::ExportRawPublicKey(std::string* output) {
+  // i2d_PublicKey will produce an ANSI X9.62 public key which, for a P-256
+  // key, is 0x04 (meaning uncompressed) followed by the x and y field
+  // elements as 32-byte, big-endian numbers.
+  static const int kExpectedKeyLength = 65;
+
+  int len = i2d_PublicKey(key_, NULL);
+  if (len != kExpectedKeyLength)
+    return false;
+
+  uint8 buf[kExpectedKeyLength];
+  uint8* derp = buf;
+  len = i2d_PublicKey(key_, &derp);
+  if (len != kExpectedKeyLength)
+    return false;
+
+  output->assign(reinterpret_cast<char*>(buf + 1), kExpectedKeyLength - 1);
+  return true;
+}
+
+bool ECPrivateKey::ExportValue(std::vector<uint8>* output) {
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
+  ScopedEC_KEY ec_key(EVP_PKEY_get1_EC_KEY(key_));
+  return ExportKey(ec_key.get(),
+                   reinterpret_cast<ExportDataFunction>(i2d_ECPrivateKey),
+                   output);
+}
+
+bool ECPrivateKey::ExportECParams(std::vector<uint8>* output) {
+  OpenSSLErrStackTracer err_tracer(FROM_HERE);
+  ScopedEC_KEY ec_key(EVP_PKEY_get1_EC_KEY(key_));
+  return ExportKey(ec_key.get(),
+                   reinterpret_cast<ExportDataFunction>(i2d_ECParameters),
+                   output);
+}
+
+ECPrivateKey::ECPrivateKey() : key_(NULL) {}
+
+}  // namespace crypto