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GH #2129: Add support for AES-GCM ciphers

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This commit is contained in:
Günter Obiltschnig
2018-03-06 22:53:27 +01:00
parent e19f33351d
commit 943595c937
8 changed files with 138 additions and 12 deletions
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10
Crypto/include/Poco/Crypto/CipherKey.h
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@@ -70,7 +70,11 @@ public:
const ByteVec& key,
const ByteVec& iv);
/// Creates a new CipherKeyImpl object using the given cipher
/// name, key and initialization vector.
/// name, key and initialization vector (IV).
///
/// The size of the IV must match the cipher's expected
/// IV size (see ivSize()), except for GCM mode, which allows
/// a custom IV size.
CipherKey(const std::string& name);
/// Creates a new CipherKeyImpl object. Autoinitializes key and
@@ -105,6 +109,10 @@ public:
void setIV(const ByteVec& iv);
/// Sets the initialization vector (IV) for the Cipher.
///
/// The size of the vector must match the cipher's expected
/// IV size (see ivSize()), except for GCM mode, which allows
/// a custom IV size.
CipherKeyImpl::Ptr impl();
/// Returns the impl object

7
Crypto/include/Poco/Crypto/CipherKeyImpl.h
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@@ -156,13 +156,6 @@ inline const CipherKeyImpl::ByteVec& CipherKeyImpl::getIV() const
}
inline void CipherKeyImpl::setIV(const ByteVec& iv)
{
poco_assert(iv.size() == static_cast<ByteVec::size_type>(ivSize()));
_iv = iv;
}
inline const EVP_CIPHER* CipherKeyImpl::cipher()
{
return _pCipher;

13
Crypto/include/Poco/Crypto/CryptoTransform.h
View File

@@ -49,7 +49,18 @@ public:
/// padding and the padding is checked and removed when decrypting. If the padding parameter is zero then
/// no padding is performed, the total amount of data encrypted or decrypted must then be a multiple of
/// the block size or an error will occur.
virtual std::string getTag(std::size_t tagSize = 16) const = 0;
/// Returns the GCM tag after encrypting using GCM mode.
///
/// Must be called after finalize().
virtual void setTag(const std::string& tag) = 0;
/// Sets the GCM tag for authenticated decryption using GCM mode.
///
/// Must be set before finalize() is called, otherwise
/// decryption will fail.
virtual std::streamsize transform(
const unsigned char* input,
std::streamsize inputLength,