/usr/include/botan-2/botan/iso9796.h is in libbotan-2-dev 2.4.0-5ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 | /*
* ISO-9796-2 - Digital signature schemes giving message recovery schemes 2 and 3
* (C) 2016 Tobias Niemann, Hackmanit GmbH
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_ISO9796_H_
#define BOTAN_ISO9796_H_
#include <botan/emsa.h>
#include <botan/hash.h>
namespace Botan {
/**
* ISO-9796-2 - Digital signature scheme 2 (probabilistic)
*/
class BOTAN_PUBLIC_API(2,0) ISO_9796_DS2 final : public EMSA
{
public:
/**
* @param hash function to use
* @param implicit whether or not the trailer is implicit
*/
explicit ISO_9796_DS2(HashFunction* hash, bool implicit = false) : m_hash(hash), m_implicit(implicit),
m_SALT_SIZE(hash->output_length()) {}
/**
* @param hash function to use
* @param implicit whether or not the trailer is implicit
* @param salt_size size of the salt to use in bytes
*/
ISO_9796_DS2(HashFunction* hash, bool implicit, size_t salt_size) : m_hash(hash), m_implicit(implicit),
m_SALT_SIZE(salt_size) {}
EMSA* clone() override;
std::string name() const override;
private:
void update(const uint8_t input[], size_t length) override;
secure_vector<uint8_t> raw_data() override;
secure_vector<uint8_t> encoding_of(const secure_vector<uint8_t>& msg,
size_t output_bits,
RandomNumberGenerator& rng) override;
bool verify(const secure_vector<uint8_t>& coded,
const secure_vector<uint8_t>& raw,
size_t key_bits) override;
std::unique_ptr<HashFunction> m_hash;
bool m_implicit;
size_t m_SALT_SIZE;
secure_vector<uint8_t> m_msg_buffer;
};
/**
* ISO-9796-2 - Digital signature scheme 3 (deterministic)
*/
class BOTAN_PUBLIC_API(2,0) ISO_9796_DS3 final : public EMSA
{
public:
/**
* @param hash function to use
* @param implicit whether or not the trailer is implicit
*/
ISO_9796_DS3(HashFunction* hash, bool implicit = false) : m_hash(hash), m_implicit(implicit)
{}
EMSA* clone() override;
std::string name() const override;
private:
void update(const uint8_t input[], size_t length) override;
secure_vector<uint8_t> raw_data() override;
secure_vector<uint8_t> encoding_of(const secure_vector<uint8_t>& msg,
size_t output_bits,
RandomNumberGenerator& rng) override;
bool verify(const secure_vector<uint8_t>& coded,
const secure_vector<uint8_t>& raw,
size_t key_bits) override;
std::unique_ptr<HashFunction> m_hash;
bool m_implicit;
secure_vector<uint8_t> m_msg_buffer;
};
}
#endif
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