From 6894dca64c04936d07048c0e8cbf7e25858548c3 Mon Sep 17 00:00:00 2001
From: lloyd <lloyd@randombit.net>
Date: Fri, 10 Jan 2014 03:41:59 +0000
Subject: Move lib into src

---
 src/lib/pbe/pbes1/pbes1.cpp | 193 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 193 insertions(+)
 create mode 100644 src/lib/pbe/pbes1/pbes1.cpp

(limited to 'src/lib/pbe/pbes1/pbes1.cpp')

diff --git a/src/lib/pbe/pbes1/pbes1.cpp b/src/lib/pbe/pbes1/pbes1.cpp
new file mode 100644
index 000000000..a30f10a6c
--- /dev/null
+++ b/src/lib/pbe/pbes1/pbes1.cpp
@@ -0,0 +1,193 @@
+/*
+* PKCS #5 PBES1
+* (C) 1999-2007 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/pbes1.h>
+#include <botan/pbkdf1.h>
+#include <botan/der_enc.h>
+#include <botan/ber_dec.h>
+#include <botan/lookup.h>
+#include <algorithm>
+
+namespace Botan {
+
+/*
+* Encrypt some bytes using PBES1
+*/
+void PBE_PKCS5v15::write(const byte input[], size_t length)
+   {
+   m_pipe.write(input, length);
+   flush_pipe(true);
+   }
+
+/*
+* Start encrypting with PBES1
+*/
+void PBE_PKCS5v15::start_msg()
+   {
+   m_pipe.append(get_cipher(m_block_cipher->name() + "/CBC/PKCS7",
+                            m_key, m_iv, m_direction));
+
+   m_pipe.start_msg();
+   if(m_pipe.message_count() > 1)
+      m_pipe.set_default_msg(m_pipe.default_msg() + 1);
+   }
+
+/*
+* Finish encrypting with PBES1
+*/
+void PBE_PKCS5v15::end_msg()
+   {
+   m_pipe.end_msg();
+   flush_pipe(false);
+   m_pipe.reset();
+   }
+
+/*
+* Flush the pipe
+*/
+void PBE_PKCS5v15::flush_pipe(bool safe_to_skip)
+   {
+   if(safe_to_skip && m_pipe.remaining() < 64)
+      return;
+
+   secure_vector<byte> buffer(DEFAULT_BUFFERSIZE);
+   while(m_pipe.remaining())
+      {
+      size_t got = m_pipe.read(&buffer[0], buffer.size());
+      send(buffer, got);
+      }
+   }
+
+/*
+* Encode PKCS#5 PBES1 parameters
+*/
+std::vector<byte> PBE_PKCS5v15::encode_params() const
+   {
+   return DER_Encoder()
+      .start_cons(SEQUENCE)
+         .encode(m_salt, OCTET_STRING)
+         .encode(m_iterations)
+      .end_cons()
+   .get_contents_unlocked();
+   }
+
+/*
+* Return an OID for this PBES1 type
+*/
+OID PBE_PKCS5v15::get_oid() const
+   {
+   const OID base_pbes1_oid("1.2.840.113549.1.5");
+
+   const std::string cipher = m_block_cipher->name();
+   const std::string digest = m_hash_function->name();
+
+   if(cipher == "DES" && digest == "MD2")
+      return (base_pbes1_oid + 1);
+   else if(cipher == "DES" && digest == "MD5")
+      return (base_pbes1_oid + 3);
+   else if(cipher == "DES" && digest == "SHA-160")
+      return (base_pbes1_oid + 10);
+   else if(cipher == "RC2" && digest == "MD2")
+      return (base_pbes1_oid + 4);
+   else if(cipher == "RC2" && digest == "MD5")
+      return (base_pbes1_oid + 6);
+   else if(cipher == "RC2" && digest == "SHA-160")
+      return (base_pbes1_oid + 11);
+   else
+      throw Internal_Error("PBE-PKCS5 v1.5: get_oid() has run out of options");
+   }
+
+std::string PBE_PKCS5v15::name() const
+   {
+   return "PBE-PKCS5v15(" + m_block_cipher->name() + "," +
+                            m_hash_function->name() + ")";
+   }
+
+PBE_PKCS5v15::PBE_PKCS5v15(BlockCipher* cipher,
+                           HashFunction* hash,
+                           const std::string& passphrase,
+                           std::chrono::milliseconds msec,
+                           RandomNumberGenerator& rng) :
+   m_direction(ENCRYPTION),
+   m_block_cipher(cipher),
+   m_hash_function(hash),
+   m_salt(rng.random_vec(8))
+   {
+   if(cipher->name() != "DES" && cipher->name() != "RC2")
+      {
+      throw Invalid_Argument("PBE_PKCS5v1.5: Unknown cipher " +
+                             cipher->name());
+      }
+
+   if(hash->name() != "MD2" && hash->name() != "MD5" &&
+      hash->name() != "SHA-160")
+      {
+      throw Invalid_Argument("PBE_PKCS5v1.5: Unknown hash " +
+                             hash->name());
+      }
+
+   PKCS5_PBKDF1 pbkdf(m_hash_function->clone());
+
+   secure_vector<byte> key_and_iv =
+      pbkdf.derive_key(16, passphrase,
+                       &m_salt[0], m_salt.size(),
+                       msec, m_iterations).bits_of();
+
+   m_key.assign(&key_and_iv[0], &key_and_iv[8]);
+   m_iv.assign(&key_and_iv[8], &key_and_iv[16]);
+
+   }
+
+PBE_PKCS5v15::PBE_PKCS5v15(BlockCipher* cipher,
+                           HashFunction* hash,
+                           const std::vector<byte>& params,
+                           const std::string& passphrase) :
+   m_direction(DECRYPTION),
+   m_block_cipher(cipher),
+   m_hash_function(hash)
+   {
+   if(cipher->name() != "DES" && cipher->name() != "RC2")
+      {
+      throw Invalid_Argument("PBE_PKCS5v1.5: Unknown cipher " +
+                             cipher->name());
+      }
+
+   if(hash->name() != "MD2" && hash->name() != "MD5" &&
+      hash->name() != "SHA-160")
+      {
+      throw Invalid_Argument("PBE_PKCS5v1.5: Unknown hash " +
+                             hash->name());
+      }
+
+   BER_Decoder(params)
+      .start_cons(SEQUENCE)
+         .decode(m_salt, OCTET_STRING)
+         .decode(m_iterations)
+         .verify_end()
+      .end_cons();
+
+   if(m_salt.size() != 8)
+      throw Decoding_Error("PBES1: Encoded salt is not 8 octets");
+
+   PKCS5_PBKDF1 pbkdf(m_hash_function->clone());
+
+   secure_vector<byte> key_and_iv =
+      pbkdf.derive_key(16, passphrase,
+                       &m_salt[0], m_salt.size(),
+                       m_iterations).bits_of();
+
+   m_key.assign(&key_and_iv[0], &key_and_iv[8]);
+   m_iv.assign(&key_and_iv[8], &key_and_iv[16]);
+   }
+
+PBE_PKCS5v15::~PBE_PKCS5v15()
+   {
+   delete m_block_cipher;
+   delete m_hash_function;
+   }
+
+}
-- 
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