Botan
1.11.15
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#include <hkdf.h>
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 |
HKDF (MessageAuthenticationCode *prf) | |
size_t | kdf (byte out[], size_t out_len, const byte secret[], size_t secret_len, const byte salt[], size_t salt_len) const override |
std::string | name () const |
Static Public Member Functions | |
static HKDF * | make (const Spec &spec) |
typedef SCAN_Name Botan::KDF::Spec [inherited] |
Botan::HKDF::HKDF | ( | MessageAuthenticationCode * | prf | ) | [inline] |
KDF* Botan::HKDF::clone | ( | ) | const [inline, virtual] |
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
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
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()); }
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
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
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
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::HKDF::kdf | ( | byte | out[], |
size_t | out_len, | ||
const byte | secret[], | ||
size_t | secret_len, | ||
const byte | salt[], | ||
size_t | salt_len | ||
) | const [override, virtual] |
Implements Botan::KDF.
Definition at line 26 of file hkdf.cpp.
References Botan::copy_mem().
{ m_prf->set_key(secret, secret_len); byte counter = 1; secure_vector<byte> h; size_t offset = 0; while(offset != out_len && counter != 0) { m_prf->update(h); m_prf->update(salt, salt_len); m_prf->update(counter++); m_prf->final(h); const size_t written = std::min(h.size(), out_len - offset); copy_mem(&out[offset], &h[0], written); offset += written; } return offset; }
HKDF * Botan::HKDF::make | ( | const Spec & | spec | ) | [static] |
std::string Botan::HKDF::name | ( | ) | const [inline, virtual] |
Implements Botan::KDF.
Definition at line 30 of file hkdf.h.
{ return "HKDF(" + m_prf->name() + ")"; }