Botan  2.0.1
Crypto and TLS for C++11
Public Member Functions | Protected Attributes | List of all members
Botan::RSA_PrivateKey Class Referenceabstract

#include <rsa.h>

Inheritance diagram for Botan::RSA_PrivateKey:
Botan::Private_Key Botan::RSA_PublicKey Botan::Public_Key Botan::Public_Key

Public Member Functions

virtual std::string algo_name () const =0
 
std::string algo_name () const override
 
AlgorithmIdentifier algorithm_identifier () const override
 
virtual AlgorithmIdentifier algorithm_identifier () const =0
 
bool check_key (RandomNumberGenerator &rng, bool) const override
 
std::unique_ptr< PK_Ops::Decryptioncreate_decryption_op (RandomNumberGenerator &rng, const std::string &params, const std::string &provider) const override
 
std::unique_ptr< PK_Ops::Encryptioncreate_encryption_op (RandomNumberGenerator &rng, const std::string &params, const std::string &provider) const override
 
virtual std::unique_ptr< PK_Ops::Encryptioncreate_encryption_op (RandomNumberGenerator &rng, const std::string &params, const std::string &provider) const
 
std::unique_ptr< PK_Ops::KEM_Decryptioncreate_kem_decryption_op (RandomNumberGenerator &rng, const std::string &params, const std::string &provider) const override
 
std::unique_ptr< PK_Ops::KEM_Encryptioncreate_kem_encryption_op (RandomNumberGenerator &rng, const std::string &params, const std::string &provider) const override
 
virtual std::unique_ptr< PK_Ops::KEM_Encryptioncreate_kem_encryption_op (RandomNumberGenerator &rng, const std::string &params, const std::string &provider) const
 
virtual std::unique_ptr< PK_Ops::Key_Agreementcreate_key_agreement_op (RandomNumberGenerator &rng, const std::string &params, const std::string &provider) const
 
std::unique_ptr< PK_Ops::Signaturecreate_signature_op (RandomNumberGenerator &rng, const std::string &params, const std::string &provider) const override
 
std::unique_ptr< PK_Ops::Verificationcreate_verification_op (const std::string &params, const std::string &provider) const override
 
virtual std::unique_ptr< PK_Ops::Verificationcreate_verification_op (const std::string &params, const std::string &provider) const
 
virtual size_t estimated_strength () const =0
 
size_t estimated_strength () const override
 
std::string fingerprint (const std::string &alg="SHA") const
 
const BigIntget_c () const
 
const BigIntget_d () const
 
const BigIntget_d1 () const
 
const BigIntget_d2 () const
 
const BigIntget_e () const
 
const BigIntget_n () const
 
virtual OID get_oid () const
 
const BigIntget_p () const
 
const BigIntget_q () const
 
virtual size_t key_length () const =0
 
size_t key_length () const override
 
virtual size_t message_part_size () const
 
virtual size_t message_parts () const
 
virtual AlgorithmIdentifier pkcs8_algorithm_identifier () const
 
secure_vector< uint8_t > private_key_bits () const override
 
secure_vector< uint8_t > private_key_info () const
 
std::vector< uint8_t > public_key_bits () const override
 
virtual std::vector< uint8_t > public_key_bits () const =0
 
 RSA_PrivateKey (const AlgorithmIdentifier &alg_id, const secure_vector< uint8_t > &key_bits)
 
 RSA_PrivateKey (const BigInt &p, const BigInt &q, const BigInt &e, const BigInt &d=0, const BigInt &n=0)
 
 RSA_PrivateKey (RandomNumberGenerator &rng, size_t bits, size_t exp=65537)
 
std::vector< uint8_t > subject_public_key () const
 

Protected Attributes

BigInt m_e
 
BigInt m_n
 

Detailed Description

RSA Private Key

Definition at line 82 of file rsa.h.

Constructor & Destructor Documentation

◆ RSA_PrivateKey() [1/3]

Botan::RSA_PrivateKey::RSA_PrivateKey ( const AlgorithmIdentifier alg_id,
const secure_vector< uint8_t > &  key_bits 
)

Load a private key.

Parameters
alg_idthe X.509 algorithm identifier
key_bitsPKCS#1 RSAPrivateKey bits

Definition at line 91 of file rsa.cpp.

References Botan::PEM_Code::decode(), Botan::BER_Decoder::decode_and_check(), Botan::RSA_PublicKey::m_e, Botan::RSA_PublicKey::m_n, Botan::SEQUENCE, and Botan::BER_Decoder::start_cons().

93  {
94  BER_Decoder(key_bits)
95  .start_cons(SEQUENCE)
96  .decode_and_check<size_t>(0, "Unknown PKCS #1 key format version")
97  .decode(m_n)
98  .decode(m_e)
99  .decode(m_d)
100  .decode(m_p)
101  .decode(m_q)
102  .decode(m_d1)
103  .decode(m_d2)
104  .decode(m_c)
105  .end_cons();
106  }
secure_vector< uint8_t > decode(DataSource &source, std::string &label)
Definition: pem.cpp:68
BigInt m_e
Definition: rsa.h:76
BigInt m_n
Definition: rsa.h:76

◆ RSA_PrivateKey() [2/3]

Botan::RSA_PrivateKey::RSA_PrivateKey ( const BigInt p,
const BigInt q,
const BigInt e,
const BigInt d = 0,
const BigInt n = 0 
)

Construct a private key from the specified parameters.

Parameters
pthe first prime
qthe second prime
ethe exponent
dif specified, this has to be d with exp * d = 1 mod (p - 1, q - 1). Leave it as 0 if you wish to the constructor to calculate it.
nif specified, this must be n = p * q. Leave it as 0 if you wish to the constructor to calculate it.

Definition at line 108 of file rsa.cpp.

References Botan::inverse_mod(), Botan::BigInt::is_even(), Botan::BigInt::is_nonzero(), Botan::lcm(), Botan::RSA_PublicKey::m_e, and Botan::RSA_PublicKey::m_n.

112  :
113  m_d{ d_exp }, m_p{ prime1 }, m_q{ prime2 }, m_d1{}, m_d2{}, m_c{ inverse_mod( m_q, m_p ) }
114  {
115  m_n = mod.is_nonzero() ? mod : m_p * m_q;
116  m_e = exp;
117 
118  if(m_d == 0)
119  {
120  BigInt inv_for_d = lcm(m_p - 1, m_q - 1);
121  if(m_e.is_even())
122  inv_for_d >>= 1;
123 
124  m_d = inverse_mod(m_e, inv_for_d);
125  }
126 
127  m_d1 = m_d % (m_p - 1);
128  m_d2 = m_d % (m_q - 1);
129  }
bool is_even() const
Definition: bigint.h:232
bool is_nonzero() const
Definition: bigint.h:244
BigInt m_e
Definition: rsa.h:76
BigInt inverse_mod(const BigInt &n, const BigInt &mod)
Definition: numthry.cpp:276
BigInt m_n
Definition: rsa.h:76
BigInt lcm(const BigInt &a, const BigInt &b)
Definition: numthry.cpp:73

◆ RSA_PrivateKey() [3/3]

Botan::RSA_PrivateKey::RSA_PrivateKey ( RandomNumberGenerator rng,
size_t  bits,
size_t  exp = 65537 
)

Create a new private key with the specified bit length

Parameters
rngthe random number generator to use
bitsthe desired bit length of the private key
expthe public exponent to be used

Definition at line 134 of file rsa.cpp.

References Botan::RSA_PublicKey::algo_name(), Botan::BigInt::bits(), Botan::inverse_mod(), Botan::lcm(), Botan::RSA_PublicKey::m_e, Botan::RSA_PublicKey::m_n, Botan::random_prime(), and Botan::ASN1::to_string().

136  {
137  if(bits < 1024)
138  throw Invalid_Argument(algo_name() + ": Can't make a key that is only " +
139  std::to_string(bits) + " bits long");
140  if(exp < 3 || exp % 2 == 0)
141  throw Invalid_Argument(algo_name() + ": Invalid encryption exponent");
142 
143  m_e = exp;
144 
145  do
146  {
147  m_p = random_prime(rng, (bits + 1) / 2, m_e);
148  m_q = random_prime(rng, bits - m_p.bits(), m_e);
149  m_n = m_p * m_q;
150  } while(m_n.bits() != bits);
151 
152  m_d = inverse_mod(m_e, lcm(m_p - 1, m_q - 1));
153  m_d1 = m_d % (m_p - 1);
154  m_d2 = m_d % (m_q - 1);
155  m_c = inverse_mod(m_q, m_p);
156  }
size_t bits() const
Definition: bigint.cpp:184
std::string to_string(const BER_Object &obj)
Definition: asn1_obj.cpp:47
BigInt m_e
Definition: rsa.h:76
std::string algo_name() const override
Definition: rsa.h:38
BigInt inverse_mod(const BigInt &n, const BigInt &mod)
Definition: numthry.cpp:276
BigInt m_n
Definition: rsa.h:76
BigInt lcm(const BigInt &a, const BigInt &b)
Definition: numthry.cpp:73
BigInt random_prime(RandomNumberGenerator &rng, size_t bits, const BigInt &coprime, size_t equiv, size_t modulo)
Definition: make_prm.cpp:17

Member Function Documentation

◆ algo_name() [1/2]

virtual std::string Botan::Public_Key::algo_name ( ) const
pure virtualinherited

◆ algo_name() [2/2]

std::string Botan::RSA_PublicKey::algo_name ( ) const
inlineoverridevirtualinherited

Get the name of the underlying public key scheme.

Returns
name of the public key scheme

Implements Botan::Public_Key.

Definition at line 38 of file rsa.h.

Referenced by create_decryption_op(), Botan::RSA_PublicKey::create_encryption_op(), create_kem_decryption_op(), Botan::RSA_PublicKey::create_kem_encryption_op(), create_signature_op(), Botan::RSA_PublicKey::create_verification_op(), and RSA_PrivateKey().

38 { return "RSA"; }

◆ algorithm_identifier() [1/2]

AlgorithmIdentifier Botan::RSA_PublicKey::algorithm_identifier ( ) const
overridevirtualinherited
Returns
X.509 AlgorithmIdentifier for this key

Implements Botan::Public_Key.

Definition at line 38 of file rsa.cpp.

References Botan::Public_Key::get_oid(), and Botan::AlgorithmIdentifier::USE_NULL_PARAM.

39  {
40  return AlgorithmIdentifier(get_oid(),
42  }
virtual OID get_oid() const
Definition: pk_keys.cpp:30

◆ algorithm_identifier() [2/2]

virtual AlgorithmIdentifier Botan::Public_Key::algorithm_identifier ( ) const
pure virtualinherited

◆ check_key()

bool Botan::RSA_PrivateKey::check_key ( RandomNumberGenerator rng,
bool  strong 
) const
overridevirtual

Test the key values for consistency.

Parameters
rngrng to use
strongwhether to perform strong and lengthy version of the test
Returns
true if the test is passed

Reimplemented from Botan::RSA_PublicKey.

Definition at line 161 of file rsa.cpp.

References Botan::BigInt::bits(), get_c(), get_d1(), get_d2(), Botan::RSA_PublicKey::get_e(), Botan::RSA_PublicKey::get_n(), get_p(), get_q(), Botan::inverse_mod(), Botan::BigInt::is_even(), Botan::is_prime(), Botan::lcm(), m_blinder, m_c, Botan::RSA_PublicKey::m_e, m_mod_p, Botan::RSA_PublicKey::m_n, m_powermod_d1_p, m_powermod_d2_q, m_powermod_e_n, Botan::mul_add(), Botan::KeyPair::signature_consistency_check(), and Botan::sub_mul().

162  {
163  if(m_n < 35 || m_n.is_even() || m_e < 2 || m_d < 2 || m_p < 3 || m_q < 3 || m_p*m_q != m_n)
164  return false;
165 
166  if(m_d1 != m_d % (m_p - 1) || m_d2 != m_d % (m_q - 1) || m_c != inverse_mod(m_q, m_p))
167  return false;
168 
169  const size_t prob = (strong) ? 128 : 12;
170 
171  if(!is_prime(m_p, rng, prob) || !is_prime(m_q, rng, prob))
172  return false;
173 
174  if(strong)
175  {
176  if((m_e * m_d) % lcm(m_p - 1, m_q - 1) != 1)
177  return false;
178 
179  return KeyPair::signature_consistency_check(rng, *this, "EMSA4(SHA-256)");
180  }
181 
182  return true;
183  }
bool is_prime(const BigInt &n, RandomNumberGenerator &rng, size_t prob, bool is_random)
Definition: numthry.cpp:441
bool is_even() const
Definition: bigint.h:232
BigInt m_e
Definition: rsa.h:76
bool signature_consistency_check(RandomNumberGenerator &rng, const Private_Key &private_key, const Public_Key &public_key, const std::string &padding)
Definition: keypair.cpp:48
BigInt inverse_mod(const BigInt &n, const BigInt &mod)
Definition: numthry.cpp:276
BigInt m_n
Definition: rsa.h:76
BigInt lcm(const BigInt &a, const BigInt &b)
Definition: numthry.cpp:73

◆ create_decryption_op()

std::unique_ptr< PK_Ops::Decryption > Botan::RSA_PrivateKey::create_decryption_op ( RandomNumberGenerator rng,
const std::string &  params,
const std::string &  provider 
) const
overridevirtual

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return an decryption operation for this key/params or throw

Parameters
rnga random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
paramsadditional parameters
providerthe provider to use

Reimplemented from Botan::Private_Key.

Definition at line 466 of file rsa.cpp.

References Botan::RSA_PublicKey::algo_name(), and Botan::Exception::what().

469  {
470 #if defined(BOTAN_HAS_OPENSSL)
471  if(provider == "openssl" || provider.empty())
472  {
473  try
474  {
475  return make_openssl_rsa_dec_op(*this, params);
476  }
477  catch(Exception& e)
478  {
479  if(provider == "openssl")
480  throw Exception("OpenSSL RSA provider rejected key:", e.what());
481  }
482  }
483 #endif
484 
485  if(provider == "base" || provider.empty())
486  return std::unique_ptr<PK_Ops::Decryption>(new RSA_Decryption_Operation(*this, params, rng));
487 
488  throw Provider_Not_Found(algo_name(), provider);
489  }
std::string algo_name() const override
Definition: rsa.h:38

◆ create_encryption_op() [1/2]

std::unique_ptr< PK_Ops::Encryption > Botan::RSA_PublicKey::create_encryption_op ( RandomNumberGenerator rng,
const std::string &  params,
const std::string &  provider 
) const
overridevirtualinherited

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return an encryption operation for this key/params or throw

Parameters
rnga random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
paramsadditional parameters
providerthe provider to use

Reimplemented from Botan::Public_Key.

Definition at line 407 of file rsa.cpp.

References Botan::RSA_PublicKey::algo_name(), and Botan::Exception::what().

410  {
411 #if defined(BOTAN_HAS_OPENSSL)
412  if(provider == "openssl" || provider.empty())
413  {
414  try
415  {
416  return make_openssl_rsa_enc_op(*this, params);
417  }
418  catch(Exception& e)
419  {
420  /*
421  * If OpenSSL for some reason could not handle this (eg due to OAEP params),
422  * throw if openssl was specifically requested but otherwise just fall back
423  * to the normal version.
424  */
425  if(provider == "openssl")
426  throw Exception("OpenSSL RSA provider rejected key:", e.what());
427  }
428  }
429 #endif
430 
431  if(provider == "base" || provider.empty())
432  return std::unique_ptr<PK_Ops::Encryption>(new RSA_Encryption_Operation(*this, params));
433  throw Provider_Not_Found(algo_name(), provider);
434  }
std::string algo_name() const override
Definition: rsa.h:38

◆ create_encryption_op() [2/2]

std::unique_ptr< PK_Ops::Encryption > Botan::Public_Key::create_encryption_op ( RandomNumberGenerator rng,
const std::string &  params,
const std::string &  provider 
) const
virtualinherited

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return an encryption operation for this key/params or throw

Parameters
rnga random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
paramsadditional parameters
providerthe provider to use

Reimplemented in Botan::RSA_PublicKey, and Botan::ElGamal_PublicKey.

Definition at line 79 of file pk_keys.cpp.

References Botan::Public_Key::algo_name().

Referenced by Botan::PK_Encryptor_EME::PK_Encryptor_EME().

82  {
83  throw Lookup_Error(algo_name() + " does not support encryption");
84  }
virtual std::string algo_name() const =0

◆ create_kem_decryption_op()

std::unique_ptr< PK_Ops::KEM_Decryption > Botan::RSA_PrivateKey::create_kem_decryption_op ( RandomNumberGenerator rng,
const std::string &  params,
const std::string &  provider 
) const
overridevirtual

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return a KEM decryption operation for this key/params or throw

Parameters
rnga random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
paramsadditional parameters
providerthe provider to use

Reimplemented from Botan::Private_Key.

Definition at line 492 of file rsa.cpp.

References Botan::RSA_PublicKey::algo_name().

495  {
496  if(provider == "base" || provider.empty())
497  return std::unique_ptr<PK_Ops::KEM_Decryption>(new RSA_KEM_Decryption_Operation(*this, params, rng));
498 
499  throw Provider_Not_Found(algo_name(), provider);
500  }
std::string algo_name() const override
Definition: rsa.h:38

◆ create_kem_encryption_op() [1/2]

std::unique_ptr< PK_Ops::KEM_Encryption > Botan::RSA_PublicKey::create_kem_encryption_op ( RandomNumberGenerator rng,
const std::string &  params,
const std::string &  provider 
) const
overridevirtualinherited

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return a KEM encryption operation for this key/params or throw

Parameters
rnga random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
paramsadditional parameters
providerthe provider to use

Reimplemented from Botan::Public_Key.

Definition at line 437 of file rsa.cpp.

References Botan::RSA_PublicKey::algo_name().

440  {
441  if(provider == "base" || provider.empty())
442  return std::unique_ptr<PK_Ops::KEM_Encryption>(new RSA_KEM_Encryption_Operation(*this, params));
443  throw Provider_Not_Found(algo_name(), provider);
444  }
std::string algo_name() const override
Definition: rsa.h:38

◆ create_kem_encryption_op() [2/2]

std::unique_ptr< PK_Ops::KEM_Encryption > Botan::Public_Key::create_kem_encryption_op ( RandomNumberGenerator rng,
const std::string &  params,
const std::string &  provider 
) const
virtualinherited

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return a KEM encryption operation for this key/params or throw

Parameters
rnga random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
paramsadditional parameters
providerthe provider to use

Reimplemented in Botan::RSA_PublicKey, and Botan::McEliece_PublicKey.

Definition at line 87 of file pk_keys.cpp.

References Botan::Public_Key::algo_name().

Referenced by Botan::PK_KEM_Encryptor::PK_KEM_Encryptor().

90  {
91  throw Lookup_Error(algo_name() + " does not support KEM encryption");
92  }
virtual std::string algo_name() const =0

◆ create_key_agreement_op()

std::unique_ptr< PK_Ops::Key_Agreement > Botan::Private_Key::create_key_agreement_op ( RandomNumberGenerator rng,
const std::string &  params,
const std::string &  provider 
) const
virtualinherited

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return a key agreement operation for this key/params or throw

Parameters
rnga random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
paramsadditional parameters
providerthe provider to use

Reimplemented in Botan::ECDH_PrivateKey, Botan::Curve25519_PrivateKey, and Botan::DH_PrivateKey.

Definition at line 126 of file pk_keys.cpp.

References Botan::Public_Key::algo_name().

Referenced by Botan::PK_Key_Agreement::PK_Key_Agreement().

129  {
130  throw Lookup_Error(algo_name() + " does not support key agreement");
131  }
virtual std::string algo_name() const =0

◆ create_signature_op()

std::unique_ptr< PK_Ops::Signature > Botan::RSA_PrivateKey::create_signature_op ( RandomNumberGenerator rng,
const std::string &  params,
const std::string &  provider 
) const
overridevirtual

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return a signature operation for this key/params or throw

Parameters
rnga random number generator. The PK_Op may maintain a reference to the RNG and use it many times. The rng must outlive any operations which reference it.
paramsadditional parameters
providerthe provider to use

Reimplemented from Botan::Private_Key.

Definition at line 503 of file rsa.cpp.

References Botan::RSA_PublicKey::algo_name().

506  {
507 #if defined(BOTAN_HAS_OPENSSL)
508  if(provider == "openssl" || provider.empty())
509  {
510  std::unique_ptr<PK_Ops::Signature> res = make_openssl_rsa_sig_op(*this, params);
511  if(res)
512  return res;
513  }
514 #endif
515 
516  if(provider == "base" || provider.empty())
517  return std::unique_ptr<PK_Ops::Signature>(new RSA_Signature_Operation(*this, params, rng));
518 
519  throw Provider_Not_Found(algo_name(), provider);
520  }
std::string algo_name() const override
Definition: rsa.h:38

◆ create_verification_op() [1/2]

std::unique_ptr< PK_Ops::Verification > Botan::RSA_PublicKey::create_verification_op ( const std::string &  params,
const std::string &  provider 
) const
overridevirtualinherited

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return a verification operation for this key/params or throw

Parameters
paramsadditional parameters
providerthe provider to use

Reimplemented from Botan::Public_Key.

Definition at line 447 of file rsa.cpp.

References Botan::RSA_PublicKey::algo_name().

449  {
450 #if defined(BOTAN_HAS_OPENSSL)
451  if(provider == "openssl" || provider.empty())
452  {
453  std::unique_ptr<PK_Ops::Verification> res = make_openssl_rsa_ver_op(*this, params);
454  if(res)
455  return res;
456  }
457 #endif
458 
459  if(provider == "base" || provider.empty())
460  return std::unique_ptr<PK_Ops::Verification>(new RSA_Verify_Operation(*this, params));
461 
462  throw Provider_Not_Found(algo_name(), provider);
463  }
std::string algo_name() const override
Definition: rsa.h:38

◆ create_verification_op() [2/2]

std::unique_ptr< PK_Ops::Verification > Botan::Public_Key::create_verification_op ( const std::string &  params,
const std::string &  provider 
) const
virtualinherited

This is an internal library function exposed on key types. In almost all cases applications should use wrappers in pubkey.h

Return a verification operation for this key/params or throw

Parameters
paramsadditional parameters
providerthe provider to use

Reimplemented in Botan::XMSS_WOTS_PublicKey, Botan::XMSS_PublicKey, Botan::RSA_PublicKey, Botan::XMSS_WOTS_Addressed_PublicKey, Botan::GOST_3410_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, and Botan::DSA_PublicKey.

Definition at line 95 of file pk_keys.cpp.

References Botan::Public_Key::algo_name().

Referenced by Botan::PK_Verifier::PK_Verifier().

97  {
98  throw Lookup_Error(algo_name() + " does not support verification");
99  }
virtual std::string algo_name() const =0

◆ estimated_strength() [1/2]

virtual size_t Botan::Public_Key::estimated_strength ( ) const
pure virtualinherited

Return the estimated strength of the underlying key against the best currently known attack. Note that this ignores anything but pure attacks against the key itself and do not take into account padding schemes, usage mistakes, etc which might reduce the strength. However it does suffice to provide an upper bound.

Returns
estimated strength in bits

Implemented in Botan::XMSS_WOTS_PublicKey, Botan::XMSS_PublicKey, Botan::TPM_PrivateKey, Botan::EC_PublicKey, Botan::XMSS_WOTS_Addressed_PublicKey, Botan::DL_Scheme_PublicKey, Botan::RSA_PublicKey, Botan::McEliece_PublicKey, and Botan::Curve25519_PublicKey.

Referenced by botan_pubkey_estimated_strength().

◆ estimated_strength() [2/2]

size_t Botan::RSA_PublicKey::estimated_strength ( ) const
overridevirtualinherited

Return the estimated strength of the underlying key against the best currently known attack. Note that this ignores anything but pure attacks against the key itself and do not take into account padding schemes, usage mistakes, etc which might reduce the strength. However it does suffice to provide an upper bound.

Returns
estimated strength in bits

Implements Botan::Public_Key.

Definition at line 33 of file rsa.cpp.

References Botan::if_work_factor(), and Botan::RSA_PublicKey::key_length().

34  {
35  return if_work_factor(key_length());
36  }
size_t key_length() const override
Definition: rsa.cpp:28
size_t if_work_factor(size_t bits)
Definition: workfactor.cpp:19

◆ fingerprint()

std::string Botan::Private_Key::fingerprint ( const std::string &  alg = "SHA") const
inherited
Returns
Hash of the PKCS #8 encoding for this key object

Definition at line 57 of file pk_keys.cpp.

References Botan::HashFunction::create(), hash, and Botan::hex_encode().

Referenced by Botan::Certificate_Store_In_SQL::find_certs_for_key(), Botan::Certificate_Store_In_SQL::insert_key(), and Botan::Certificate_Store_In_SQL::remove_key().

58  {
59  secure_vector<uint8_t> buf = private_key_bits();
60  std::unique_ptr<HashFunction> hash(HashFunction::create(alg));
61  hash->update(buf);
62  const auto hex_print = hex_encode(hash->final());
63 
64  std::string formatted_print;
65 
66  for(size_t i = 0; i != hex_print.size(); i += 2)
67  {
68  formatted_print.push_back(hex_print[i]);
69  formatted_print.push_back(hex_print[i+1]);
70 
71  if(i != hex_print.size() - 2)
72  formatted_print.push_back(':');
73  }
74 
75  return formatted_print;
76  }
virtual secure_vector< uint8_t > private_key_bits() const =0
static std::unique_ptr< HashFunction > create(const std::string &algo_spec, const std::string &provider="")
Definition: hash.cpp:93
void hex_encode(char output[], const uint8_t input[], size_t input_length, bool uppercase)
Definition: hex.cpp:14
MechanismType hash

◆ get_c()

const BigInt& Botan::RSA_PrivateKey::get_c ( ) const
inline

Definition at line 137 of file rsa.h.

References m_c.

Referenced by check_key().

137 { return m_c; }

◆ get_d()

const BigInt& Botan::RSA_PrivateKey::get_d ( ) const
inline

Get d with exp * d = 1 mod (p - 1, q - 1).

Returns
d

Definition at line 135 of file rsa.h.

135 { return m_d; }

◆ get_d1()

const BigInt& Botan::RSA_PrivateKey::get_d1 ( ) const
inline

Definition at line 138 of file rsa.h.

Referenced by check_key().

138 { return m_d1; }

◆ get_d2()

const BigInt& Botan::RSA_PrivateKey::get_d2 ( ) const
inline

Definition at line 139 of file rsa.h.

Referenced by check_key().

139 { return m_d2; }

◆ get_e()

const BigInt& Botan::RSA_PublicKey::get_e ( ) const
inlineinherited
Returns
public exponent

Definition at line 54 of file rsa.h.

Referenced by check_key().

54 { return m_e; }
BigInt m_e
Definition: rsa.h:76

◆ get_n()

const BigInt& Botan::RSA_PublicKey::get_n ( ) const
inlineinherited
Returns
public modulus

Definition at line 49 of file rsa.h.

References m_n.

Referenced by check_key().

49 { return m_n; }
BigInt m_n
Definition: rsa.h:76

◆ get_oid()

OID Botan::Public_Key::get_oid ( ) const
virtualinherited

Get the OID of the underlying public key scheme.

Returns
OID of the public key scheme

Reimplemented in Botan::XMSS_WOTS_Addressed_PublicKey.

Definition at line 30 of file pk_keys.cpp.

References Botan::Public_Key::algo_name(), and Botan::OIDS::lookup().

Referenced by Botan::DL_Scheme_PublicKey::algorithm_identifier(), Botan::Curve25519_PublicKey::algorithm_identifier(), Botan::McEliece_PublicKey::algorithm_identifier(), Botan::RSA_PublicKey::algorithm_identifier(), Botan::GOST_3410_PublicKey::algorithm_identifier(), Botan::EC_PublicKey::algorithm_identifier(), Botan::TPM_PrivateKey::algorithm_identifier(), and Botan::XMSS_WOTS_Addressed_PublicKey::get_oid().

31  {
32  try {
33  return OIDS::lookup(algo_name());
34  }
35  catch(Lookup_Error&)
36  {
37  throw Lookup_Error("PK algo " + algo_name() + " has no defined OIDs");
38  }
39  }
virtual std::string algo_name() const =0
std::string lookup(const OID &oid)
Definition: oids.cpp:18

◆ get_p()

const BigInt& Botan::RSA_PrivateKey::get_p ( ) const
inline

Get the first prime p.

Returns
prime p

Definition at line 123 of file rsa.h.

Referenced by check_key().

123 { return m_p; }

◆ get_q()

const BigInt& Botan::RSA_PrivateKey::get_q ( ) const
inline

Get the second prime q.

Returns
prime q

Definition at line 129 of file rsa.h.

References m_q.

Referenced by check_key().

129 { return m_q; }

◆ key_length() [1/2]

virtual size_t Botan::Public_Key::key_length ( ) const
pure virtualinherited

Return an integer value best approximating the length of the primary security parameter. For example for RSA this will be the size of the modulus, for ECDSA the size of the ECC group, and for McEliece the size of the code will be returned.

Implemented in Botan::XMSS_WOTS_PublicKey, Botan::XMSS_PublicKey, Botan::TPM_PrivateKey, Botan::EC_PublicKey, Botan::XMSS_WOTS_Addressed_PublicKey, Botan::DL_Scheme_PublicKey, Botan::RSA_PublicKey, Botan::McEliece_PublicKey, and Botan::Curve25519_PublicKey.

Referenced by Botan::TLS::Policy::check_peer_key_acceptable().

◆ key_length() [2/2]

size_t Botan::RSA_PublicKey::key_length ( ) const
overridevirtualinherited

Return an integer value best approximating the length of the primary security parameter. For example for RSA this will be the size of the modulus, for ECDSA the size of the ECC group, and for McEliece the size of the code will be returned.

Implements Botan::Public_Key.

Definition at line 28 of file rsa.cpp.

References Botan::BigInt::bits(), and Botan::RSA_PublicKey::m_n.

Referenced by Botan::RSA_PublicKey::estimated_strength().

29  {
30  return m_n.bits();
31  }
size_t bits() const
Definition: bigint.cpp:184
BigInt m_n
Definition: rsa.h:76

◆ message_part_size()

virtual size_t Botan::Public_Key::message_part_size ( ) const
inlinevirtualinherited

Returns how large each of the message parts refered to by message_parts() is

This function is public but applications should have few reasons to ever call this.

Returns
size of the message parts in bits

Reimplemented in Botan::GOST_3410_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, and Botan::DSA_PublicKey.

Definition at line 114 of file pk_keys.h.

Referenced by Botan::PK_Signer::PK_Signer(), and Botan::PK_Verifier::PK_Verifier().

114 { return 0; }

◆ message_parts()

virtual size_t Botan::Public_Key::message_parts ( ) const
inlinevirtualinherited

Returns more than 1 if the output of this algorithm (ciphertext, signature) should be treated as more than one value. This is used for algorithms like DSA and ECDSA, where the (r,s) output pair can be encoded as either a plain binary list or a TLV tagged DER encoding depending on the protocol.

This function is public but applications should have few reasons to ever call this.

Returns
number of message parts

Reimplemented in Botan::GOST_3410_PublicKey, Botan::ECDSA_PublicKey, Botan::ECGDSA_PublicKey, Botan::ECKCDSA_PublicKey, and Botan::DSA_PublicKey.

Definition at line 103 of file pk_keys.h.

Referenced by Botan::X509_Object::check_signature(), Botan::choose_sig_format(), Botan::PK_Signer::PK_Signer(), and Botan::PK_Verifier::PK_Verifier().

103 { return 1; }

◆ pkcs8_algorithm_identifier()

virtual AlgorithmIdentifier Botan::Private_Key::pkcs8_algorithm_identifier ( ) const
inlinevirtualinherited
Returns
PKCS #8 AlgorithmIdentifier for this key Might be different from the X.509 identifier, but normally is not

Reimplemented in Botan::XMSS_WOTS_PrivateKey, Botan::GOST_3410_PrivateKey, and Botan::XMSS_WOTS_Addressed_PrivateKey.

Definition at line 188 of file pk_keys.h.

189  { return algorithm_identifier(); }
virtual AlgorithmIdentifier algorithm_identifier() const =0

◆ private_key_bits()

secure_vector< uint8_t > Botan::RSA_PrivateKey::private_key_bits ( ) const
overridevirtual
Returns
BER encoded private key bits

Implements Botan::Private_Key.

Definition at line 74 of file rsa.cpp.

References Botan::DER_Encoder::encode(), Botan::RSA_PublicKey::m_e, Botan::RSA_PublicKey::m_n, Botan::SEQUENCE, and Botan::DER_Encoder::start_cons().

75  {
76  return DER_Encoder()
77  .start_cons(SEQUENCE)
78  .encode(static_cast<size_t>(0))
79  .encode(m_n)
80  .encode(m_e)
81  .encode(m_d)
82  .encode(m_p)
83  .encode(m_q)
84  .encode(m_d1)
85  .encode(m_d2)
86  .encode(m_c)
87  .end_cons()
88  .get_contents();
89  }
BigInt m_e
Definition: rsa.h:76
BigInt m_n
Definition: rsa.h:76

◆ private_key_info()

secure_vector< uint8_t > Botan::Private_Key::private_key_info ( ) const
inherited
Returns
PKCS #8 private key encoding for this key object

Definition at line 41 of file pk_keys.cpp.

References Botan::DER_Encoder::encode(), Botan::DER_Encoder::end_cons(), Botan::DER_Encoder::get_contents(), Botan::OCTET_STRING, Botan::SEQUENCE, and Botan::DER_Encoder::start_cons().

Referenced by Botan::PKCS8::BER_encode(), Botan::PKCS8::BER_encode_encrypted_pbkdf_iter(), and Botan::PKCS8::BER_encode_encrypted_pbkdf_msec().

42  {
43  const size_t PKCS8_VERSION = 0;
44 
45  return DER_Encoder()
46  .start_cons(SEQUENCE)
47  .encode(PKCS8_VERSION)
49  .encode(private_key_bits(), OCTET_STRING)
50  .end_cons()
51  .get_contents();
52  }
virtual secure_vector< uint8_t > private_key_bits() const =0
virtual AlgorithmIdentifier pkcs8_algorithm_identifier() const
Definition: pk_keys.h:188

◆ public_key_bits() [1/2]

std::vector< uint8_t > Botan::RSA_PublicKey::public_key_bits ( ) const
overridevirtualinherited
Returns
BER encoded public key bits

Implements Botan::Public_Key.

Definition at line 44 of file rsa.cpp.

References Botan::DER_Encoder::encode(), Botan::DER_Encoder::end_cons(), Botan::DER_Encoder::get_contents_unlocked(), Botan::RSA_PublicKey::m_e, Botan::RSA_PublicKey::m_n, Botan::SEQUENCE, and Botan::DER_Encoder::start_cons().

45  {
46  return DER_Encoder()
47  .start_cons(SEQUENCE)
48  .encode(m_n)
49  .encode(m_e)
50  .end_cons()
51  .get_contents_unlocked();
52  }
BigInt m_e
Definition: rsa.h:76
BigInt m_n
Definition: rsa.h:76

◆ public_key_bits() [2/2]

virtual std::vector<uint8_t> Botan::Public_Key::public_key_bits ( ) const
pure virtualinherited

◆ subject_public_key()

std::vector< uint8_t > Botan::Public_Key::subject_public_key ( ) const
inherited
Returns
X.509 subject key encoding for this key object

Definition at line 17 of file pk_keys.cpp.

References Botan::Public_Key::algorithm_identifier(), Botan::BIT_STRING, Botan::DER_Encoder::encode(), Botan::DER_Encoder::end_cons(), Botan::DER_Encoder::get_contents_unlocked(), Botan::Public_Key::public_key_bits(), Botan::SEQUENCE, and Botan::DER_Encoder::start_cons().

Referenced by Botan::X509::BER_encode(), and Botan::X509::PEM_encode().

18  {
19  return DER_Encoder()
20  .start_cons(SEQUENCE)
21  .encode(algorithm_identifier())
22  .encode(public_key_bits(), BIT_STRING)
23  .end_cons()
24  .get_contents_unlocked();
25  }
virtual std::vector< uint8_t > public_key_bits() const =0
virtual AlgorithmIdentifier algorithm_identifier() const =0

Member Data Documentation

◆ m_e

BigInt Botan::RSA_PublicKey::m_e
protectedinherited

◆ m_n

BigInt Botan::RSA_PublicKey::m_n
protectedinherited

The documentation for this class was generated from the following files: