1 files changed, 104 insertions, 0 deletions
diff --git a/src/libs/3rdparty/botan/src/lib/pk_pad/emsa.h b/src/libs/3rdparty/botan/src/lib/pk_pad/emsa.h
new file mode 100644
index 00000000000..fe0785294f6
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+++ b/src/libs/3rdparty/botan/src/lib/pk_pad/emsa.h
@@ -0,0 +1,104 @@
+/*
+* EMSA Classes
+* (C) 1999-2007 Jack Lloyd
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+#ifndef BOTAN_PUBKEY_EMSA_H_
+#define BOTAN_PUBKEY_EMSA_H_
+
+#include <botan/secmem.h>
+#include <botan/alg_id.h>
+
+namespace Botan {
+
+class Private_Key;
+class RandomNumberGenerator;
+
+/**
+* EMSA, from IEEE 1363s Encoding Method for Signatures, Appendix
+*
+* Any way of encoding/padding signatures
+*/
+class BOTAN_PUBLIC_API(2,0) EMSA
+   {
+   public:
+      virtual ~EMSA() = default;
+
+      /**
+      * Add more data to the signature computation
+      * @param input some data
+      * @param length length of input in bytes
+      */
+      virtual void update(const uint8_t input[], size_t length) = 0;
+
+      /**
+      * @return raw hash
+      */
+      virtual secure_vector<uint8_t> raw_data() = 0;
+
+      /**
+      * Return the encoding of a message
+      * @param msg the result of raw_data()
+      * @param output_bits the desired output bit size
+      * @param rng a random number generator
+      * @return encoded signature
+      */
+      virtual secure_vector<uint8_t> encoding_of(const secure_vector<uint8_t>& msg,
+                                             size_t output_bits,
+                                             RandomNumberGenerator& rng) = 0;
+
+      /**
+      * Verify the encoding
+      * @param coded the received (coded) message representative
+      * @param raw the computed (local, uncoded) message representative
+      * @param key_bits the size of the key in bits
+      * @return true if coded is a valid encoding of raw, otherwise false
+      */
+      virtual bool verify(const secure_vector<uint8_t>& coded,
+                          const secure_vector<uint8_t>& raw,
+                          size_t key_bits) = 0;
+
+      /**
+      * Prepare sig_algo for use in choose_sig_format for x509 certs
+      *
+      * @param key used for checking compatibility with the encoding scheme
+      * @param cert_hash_name is checked to equal the hash for the encoding
+      * @return algorithm identifier to signatures created using this key,
+      *         padding method and hash.
+      */
+      virtual AlgorithmIdentifier config_for_x509(const Private_Key& key,
+                                                  const std::string& cert_hash_name) const;
+
+      /**
+      * @return a new object representing the same encoding method as *this
+      */
+      virtual EMSA* clone() = 0;
+
+      /**
+      * @return the SCAN name of the encoding/padding scheme
+      */
+      virtual std::string name() const = 0;
+   };
+
+/**
+* Factory method for EMSA (message-encoding methods for signatures
+* with appendix) objects
+* @param algo_spec the name of the EMSA to create
+* @return pointer to newly allocated object of that type
+*/
+BOTAN_PUBLIC_API(2,0) EMSA* get_emsa(const std::string& algo_spec);
+
+/**
+* Returns the hash function used in the given EMSA scheme
+* If the hash function is not specified or not understood,
+* returns "SHA-512"
+* @param algo_spec the name of the EMSA
+* @return hash function used in the given EMSA scheme
+*/
+BOTAN_PUBLIC_API(2,0) std::string hash_for_emsa(const std::string& algo_spec);
+
+}
+
+#endif