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Diffstat (limited to 'comm/third_party/botan/src/lib/kdf/sp800_56a/sp800_56a.h')
-rw-r--r-- | comm/third_party/botan/src/lib/kdf/sp800_56a/sp800_56a.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/kdf/sp800_56a/sp800_56a.h b/comm/third_party/botan/src/lib/kdf/sp800_56a/sp800_56a.h new file mode 100644 index 0000000000..e83f117e2e --- /dev/null +++ b/comm/third_party/botan/src/lib/kdf/sp800_56a/sp800_56a.h @@ -0,0 +1,103 @@ +/* +* KDF defined in NIST SP 800-56a revision 2 (Single-step key-derivation function) +* +* (C) 2017 Ribose Inc. Written by Krzysztof Kwiatkowski. +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#ifndef BOTAN_SP800_56A_H_ +#define BOTAN_SP800_56A_H_ + +#include <botan/kdf.h> +#include <botan/hash.h> +#include <botan/mac.h> + +BOTAN_FUTURE_INTERNAL_HEADER(sp800_56a.h) + +namespace Botan { + +/** + * NIST SP 800-56A KDF using hash function + * @warning This KDF ignores the provided salt value + */ +class BOTAN_PUBLIC_API(2,2) SP800_56A_Hash final : public KDF + { + public: + std::string name() const override { return "SP800-56A(" + m_hash->name() + ")"; } + + KDF* clone() const override { return new SP800_56A_Hash(m_hash->clone()); } + + /** + * Derive a key using the SP800-56A 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 ignored + * @param salt_len ignored + * @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 hash the hash function to use as the auxiliary function + */ + explicit SP800_56A_Hash(HashFunction* hash) : m_hash(hash) {} + private: + std::unique_ptr<HashFunction> m_hash; + }; + +/** + * NIST SP 800-56A KDF using HMAC + */ +class BOTAN_PUBLIC_API(2,2) SP800_56A_HMAC final : public KDF + { + public: + std::string name() const override { return "SP800-56A(" + m_mac->name() + ")"; } + + KDF* clone() const override { return new SP800_56A_HMAC(m_mac->clone()); } + + /** + * Derive a key using the SP800-56A 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 ignored + * @param salt_len ignored + * @param label label for the expansion step + * @param label_len size of label in bytes + * + * @throws Invalid_Argument key_len > 2^32 or MAC is not a HMAC + */ + 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 the HMAC to use as the auxiliary function + */ + explicit SP800_56A_HMAC(MessageAuthenticationCode* mac); + private: + std::unique_ptr<MessageAuthenticationCode> m_mac; + }; + +} + +#endif |