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Diffstat (limited to 'comm/third_party/botan/src/lib/kdf/sp800_56c/sp800_56c.h')
-rw-r--r-- | comm/third_party/botan/src/lib/kdf/sp800_56c/sp800_56c.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/kdf/sp800_56c/sp800_56c.h b/comm/third_party/botan/src/lib/kdf/sp800_56c/sp800_56c.h new file mode 100644 index 0000000000..bdbdfcd9e1 --- /dev/null +++ b/comm/third_party/botan/src/lib/kdf/sp800_56c/sp800_56c.h @@ -0,0 +1,61 @@ +/* +* KDF defined in NIST SP 800-56c +* (C) 2016 Kai Michaelis +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#ifndef BOTAN_SP800_56C_H_ +#define BOTAN_SP800_56C_H_ + +#include <botan/kdf.h> +#include <botan/mac.h> + +BOTAN_FUTURE_INTERNAL_HEADER(sp800_56c.h) + +namespace Botan { + +/** + * NIST SP 800-56C KDF + */ +class BOTAN_PUBLIC_API(2,0) SP800_56C final : public KDF + { + public: + std::string name() const override { return "SP800-56C(" + m_prf->name() + ")"; } + + KDF* clone() const override { return new SP800_56C(m_prf->clone(), m_exp->clone()); } + + /** + * Derive a key using the SP800-56C KDF. + * + * The implementation hard codes the context value for the + * expansion step to the empty string. + * + * @param key derived keying material K_M + * @param key_len the desired output length in bytes + * @param secret shared secret Z + * @param secret_len size of Z in bytes + * @param salt salt s of the extraction step + * @param salt_len size of s in bytes + * @param label label for the expansion step + * @param label_len size of label in bytes + * + * @throws Invalid_Argument key_len > 2^32 + */ + size_t kdf(uint8_t key[], size_t key_len, + const uint8_t secret[], size_t secret_len, + const uint8_t salt[], size_t salt_len, + const uint8_t label[], size_t label_len) const override; + + /** + * @param mac MAC algorithm used for randomness extraction + * @param exp KDF used for key expansion + */ + SP800_56C(MessageAuthenticationCode* mac, KDF* exp) : m_prf(mac), m_exp(exp) {} + private: + std::unique_ptr<MessageAuthenticationCode> m_prf; + std::unique_ptr<KDF> m_exp; + }; +} + +#endif |