diff options
Diffstat (limited to 'comm/third_party/botan/src/lib/prov/openssl/openssl_rc4.cpp')
-rw-r--r-- | comm/third_party/botan/src/lib/prov/openssl/openssl_rc4.cpp | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/prov/openssl/openssl_rc4.cpp b/comm/third_party/botan/src/lib/prov/openssl/openssl_rc4.cpp new file mode 100644 index 0000000000..dbda890f82 --- /dev/null +++ b/comm/third_party/botan/src/lib/prov/openssl/openssl_rc4.cpp @@ -0,0 +1,93 @@ +/* +* OpenSSL RC4 +* (C) 1999-2007,2015 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#include <botan/stream_cipher.h> + +#if defined(BOTAN_HAS_OPENSSL) && defined(BOTAN_HAS_RC4) + +#include <botan/internal/openssl.h> +#include <botan/parsing.h> +#include <botan/exceptn.h> +#include <openssl/rc4.h> + +namespace Botan { + +namespace { + +class OpenSSL_RC4 final : public StreamCipher + { + public: + void clear() override { clear_mem(&m_rc4, 1); m_key_set = false; } + + std::string provider() const override { return "openssl"; } + + std::string name() const override + { + switch(m_skip) + { + case 0: + return "RC4"; + case 256: + return "MARK-4"; + default: + return "RC4(" + std::to_string(m_skip) + ")"; + } + } + + StreamCipher* clone() const override { return new OpenSSL_RC4(m_skip); } + + Key_Length_Specification key_spec() const override + { + return Key_Length_Specification(1, 32); + } + + explicit OpenSSL_RC4(size_t skip = 0) : m_skip(skip) { clear(); } + ~OpenSSL_RC4() { clear(); } + + void set_iv(const uint8_t*, size_t len) override + { + if(len > 0) + throw Invalid_IV_Length("RC4", len); + } + + void seek(uint64_t) override + { + throw Not_Implemented("RC4 does not support seeking"); + } + private: + void cipher(const uint8_t in[], uint8_t out[], size_t length) override + { + verify_key_set(m_key_set); + ::RC4(&m_rc4, length, in, out); + } + + void key_schedule(const uint8_t key[], size_t length) override + { + ::RC4_set_key(&m_rc4, length, key); + uint8_t d = 0; + for(size_t i = 0; i != m_skip; ++i) + ::RC4(&m_rc4, 1, &d, &d); + m_key_set = true; + } + + size_t m_skip; + RC4_KEY m_rc4; + bool m_key_set; + }; + +} + +std::unique_ptr<StreamCipher> +make_openssl_rc4(size_t skip) + { + return std::unique_ptr<StreamCipher>(new OpenSSL_RC4(skip)); + } + + +} + +#endif |