#include <prf_x942.h>
Inheritance diagram for Botan::X942_PRF:
Public Types | |
| typedef SCAN_Name | Spec |
Public Member Functions | |
| KDF * | clone () const |
| secure_vector< byte > | derive_key (size_t key_len, const byte secret[], size_t secret_len, const byte salt[], size_t salt_len) const |
| secure_vector< byte > | derive_key (size_t key_len, const secure_vector< byte > &secret, const std::string &salt="") const |
| template<typename Alloc , typename Alloc2 > | |
| secure_vector< byte > | derive_key (size_t key_len, const std::vector< byte, Alloc > &secret, const std::vector< byte, Alloc2 > &salt) const |
| secure_vector< byte > | derive_key (size_t key_len, const secure_vector< byte > &secret, const byte salt[], size_t salt_len) const |
| secure_vector< byte > | derive_key (size_t key_len, const byte secret[], size_t secret_len, const std::string &salt="") const |
| size_t | kdf (byte key[], size_t key_len, const byte secret[], size_t secret_len, const byte salt[], size_t salt_len) const override |
| std::string | name () const |
| X942_PRF (const std::string &oid) | |
Detailed Description
PRF from ANSI X9.42
Definition at line 18 of file prf_x942.h.
Member Typedef Documentation
typedef SCAN_Name Botan::KDF::Spec [inherited] |
Constructor & Destructor Documentation
| Botan::X942_PRF::X942_PRF | ( | const std::string & | oid | ) |
Definition at line 85 of file prf_x942.cpp.
References Botan::OIDS::have_oid(), and Botan::OIDS::lookup().
{
if(OIDS::have_oid(oid))
m_key_wrap_oid = OIDS::lookup(oid).as_string();
else
m_key_wrap_oid = oid;
}
Member Function Documentation
| KDF* Botan::X942_PRF::clone | ( | ) | const [inline, virtual] |
Implements Botan::KDF.
Definition at line 23 of file prf_x942.h.
{ return new X942_PRF(m_key_wrap_oid); }
| secure_vector<byte> Botan::KDF::derive_key | ( | size_t | key_len, |
| const byte | secret[], | ||
| size_t | secret_len, | ||
| const byte | salt[], | ||
| size_t | salt_len | ||
| ) | const [inline, inherited] |
Derive a key
- Parameters:
-
key_len the desired output length in bytes secret the secret input secret_len size of secret in bytes salt a diversifier salt_len size of salt in bytes
Definition at line 41 of file kdf.h.
{
secure_vector<byte> key(key_len);
key.resize(kdf(&key[0], key.size(), secret, secret_len, salt, salt_len));
return key;
}
| secure_vector<byte> Botan::KDF::derive_key | ( | size_t | key_len, |
| const secure_vector< byte > & | secret, | ||
| const std::string & | salt = "" |
||
| ) | const [inline, inherited] |
Derive a key
- Parameters:
-
key_len the desired output length in bytes secret the secret input salt a diversifier
Definition at line 58 of file kdf.h.
{
return derive_key(key_len, &secret[0], secret.size(),
reinterpret_cast<const byte*>(salt.data()),
salt.length());
}
template<typename Alloc , typename Alloc2 >
| secure_vector<byte> Botan::KDF::derive_key | ( | size_t | key_len, |
| const std::vector< byte, Alloc > & | secret, | ||
| const std::vector< byte, Alloc2 > & | salt | ||
| ) | const [inline, inherited] |
Derive a key
- Parameters:
-
key_len the desired output length in bytes secret the secret input salt a diversifier
Definition at line 74 of file kdf.h.
{
return derive_key(key_len,
&secret[0], secret.size(),
&salt[0], salt.size());
}
| secure_vector<byte> Botan::KDF::derive_key | ( | size_t | key_len, |
| const secure_vector< byte > & | secret, | ||
| const byte | salt[], | ||
| size_t | salt_len | ||
| ) | const [inline, inherited] |
Derive a key
- Parameters:
-
key_len the desired output length in bytes secret the secret input salt a diversifier salt_len size of salt in bytes
Definition at line 90 of file kdf.h.
{
return derive_key(key_len,
&secret[0], secret.size(),
salt, salt_len);
}
| secure_vector<byte> Botan::KDF::derive_key | ( | size_t | key_len, |
| const byte | secret[], | ||
| size_t | secret_len, | ||
| const std::string & | salt = "" |
||
| ) | const [inline, inherited] |
Derive a key
- Parameters:
-
key_len the desired output length in bytes secret the secret input secret_len size of secret in bytes salt a diversifier
Definition at line 107 of file kdf.h.
{
return derive_key(key_len, secret, secret_len,
reinterpret_cast<const byte*>(salt.data()),
salt.length());
}
| size_t Botan::X942_PRF::kdf | ( | byte | key[], |
| size_t | key_len, | ||
| const byte | secret[], | ||
| size_t | secret_len, | ||
| const byte | salt[], | ||
| size_t | salt_len | ||
| ) | const [override, virtual] |
Implements Botan::KDF.
Definition at line 34 of file prf_x942.cpp.
References Botan::copy_mem(), Botan::PEM_Code::encode(), Botan::OCTET_STRING, and Botan::SEQUENCE.
{
std::unique_ptr<HashFunction> hash(make_a<HashFunction>("SHA-160"));
const OID kek_algo(m_key_wrap_oid);
secure_vector<byte> h;
size_t offset = 0;
u32bit counter = 1;
while(offset != key_len && counter)
{
hash->update(secret, secret_len);
hash->update(
DER_Encoder().start_cons(SEQUENCE)
.start_cons(SEQUENCE)
.encode(kek_algo)
.raw_bytes(encode_x942_int(counter))
.end_cons()
.encode_if(salt_len != 0,
DER_Encoder()
.start_explicit(0)
.encode(salt, salt_len, OCTET_STRING)
.end_explicit()
)
.start_explicit(2)
.raw_bytes(encode_x942_int(static_cast<u32bit>(8 * key_len)))
.end_explicit()
.end_cons().get_contents()
);
hash->final(h);
const size_t copied = std::min(h.size(), key_len - offset);
copy_mem(&key[offset], &h[0], copied);
offset += copied;
++counter;
}
return offset;
}
| std::string Botan::X942_PRF::name | ( | ) | const [inline, virtual] |
Implements Botan::KDF.
Definition at line 21 of file prf_x942.h.
{ return "X942_PRF(" + m_key_wrap_oid + ")"; }
The documentation for this class was generated from the following files:
- src/lib/kdf/prf_x942/prf_x942.h
- src/lib/kdf/prf_x942/prf_x942.cpp
