OpenDDS::Security::CryptoBuiltInImpl::Session Struct Reference

List of all members.

Public Member Functions
KeyOctetSeq	get_key (const KeyMaterial &master, const CryptoHeader &header)
void	create_key (const KeyMaterial &master)
void	derive_key (const KeyMaterial &master)
void	next_id (const KeyMaterial &master)
void	inc_iv ()
Public Attributes
SessionIdType	id_
IV_SuffixType	iv_suffix_
KeyOctetSeq	key_
ACE_UINT64	counter_

Detailed Description

Definition at line 252 of file CryptoBuiltInImpl.h.

Member Function Documentation

void OpenDDS::Security::CryptoBuiltInImpl::Session::create_key ( const KeyMaterial & master )

Definition at line 854 of file CryptoBuiltInImpl.cpp.

References counter_, derive_key(), id_, and iv_suffix_.

Referenced by OpenDDS::Security::CryptoBuiltInImpl::encauth_setup().

00855 {
00856   RAND_bytes(id_, sizeof id_);
00857   RAND_bytes(iv_suffix_, sizeof iv_suffix_);
00858   derive_key(master);
00859   counter_ = 0;
00860 }

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void OpenDDS::Security::CryptoBuiltInImpl::Session::derive_key ( const KeyMaterial & master )

Definition at line 1349 of file CryptoBuiltInImpl.cpp.

References id_, key_, OpenDDS::Security::KeyMaterial_AES_GCM_GMAC::master_salt, and OpenDDS::Security::KeyMaterial_AES_GCM_GMAC::master_sender_key.

Referenced by create_key(), get_key(), and next_id().

01350 {
01351   PrivateKey pkey(master.master_sender_key);
01352   DigestContext ctx;
01353   const EVP_MD* md = EVP_get_digestbyname("SHA256");
01354 
01355   if (EVP_DigestInit_ex(ctx, md, 0) < 1) {
01356     return;
01357   }
01358 
01359   if (EVP_DigestSignInit(ctx, 0, md, 0, pkey) < 1) {
01360     return;
01361   }
01362 
01363   static const char cookie[] = "SessionKey"; // DDSSEC12-53: NUL excluded
01364   if (EVP_DigestSignUpdate(ctx, cookie, (sizeof cookie) - 1) < 1) {
01365     return;
01366   }
01367 
01368   const KeyOctetSeq& salt = master.master_salt;
01369   if (EVP_DigestSignUpdate(ctx, salt.get_buffer(), salt.length()) < 1) {
01370     return;
01371   }
01372 
01373   if (EVP_DigestSignUpdate(ctx, id_, sizeof id_) < 1) {
01374     return;
01375   }
01376 
01377   size_t req = 0;
01378   if (EVP_DigestSignFinal(ctx, 0, &req) < 1) {
01379     return;
01380   }
01381 
01382   key_.length(static_cast<unsigned int>(req));
01383   if (EVP_DigestSignFinal(ctx, key_.get_buffer(), &req) < 1) {
01384     key_.length(0);
01385   }
01386 }

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KeyOctetSeq OpenDDS::Security::CryptoBuiltInImpl::Session::get_key	(	const KeyMaterial &	master,
		const CryptoHeader &	header
	)

Definition at line 1337 of file CryptoBuiltInImpl.cpp.

References derive_key(), id_, key_, and OpenDDS::Security::CryptoHeader::session_id.

Referenced by OpenDDS::Security::CryptoBuiltInImpl::decrypt(), and OpenDDS::Security::CryptoBuiltInImpl::verify().

01339 {
01340   if (key_.length() && 0 == std::memcmp(&id_, &header.session_id, sizeof id_)) {
01341     return key_;
01342   }
01343   std::memcpy(&id_, &header.session_id, sizeof id_);
01344   key_.length(0);
01345   derive_key(master);
01346   return key_;
01347 }

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void OpenDDS::Security::CryptoBuiltInImpl::Session::inc_iv ( )

Definition at line 871 of file CryptoBuiltInImpl.cpp.

References iv_suffix_.

Referenced by OpenDDS::Security::CryptoBuiltInImpl::encauth_setup().

00872 {
00873   if (inc32(iv_suffix_)) {
00874     inc32(iv_suffix_ + 4);
00875   }
00876 }

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void OpenDDS::Security::CryptoBuiltInImpl::Session::next_id ( const KeyMaterial & master )

Definition at line 862 of file CryptoBuiltInImpl.cpp.

References counter_, derive_key(), id_, iv_suffix_, and key_.

Referenced by OpenDDS::Security::CryptoBuiltInImpl::encauth_setup().

00863 {
00864   inc32(id_);
00865   RAND_bytes(iv_suffix_, sizeof iv_suffix_);
00866   key_.length(0);
00867   derive_key(master);
00868   counter_ = 0;
00869 }