You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
struct GNUNET_PeerIdentity;
#include "gnunet_common.h"
-#include "gnunet_scheduler_lib.h"
#include <gcrypt.h>
-/**
- * @ingroup crypto
- * Convert ECDSA public key to ECDHE public key.
- * Please be very careful when using this function, as mixing
- * cryptographic primitives is not always healthy.
- *
- * @param ecdsa ecdsa public key
- * @param ecdhe[OUT] ecdhe public key
- */
-void
-GNUNET_CRYPTO_ecdsa_public_to_ecdhe (const struct GNUNET_CRYPTO_EcdsaPublicKey *ecdsa,
- struct GNUNET_CRYPTO_EcdhePublicKey *ecdhe);
-
-
-/**
- * @ingroup crypto
- * Convert ECDSA private key to ECDHE private key.
- * Please be very careful when using this function, as mixing
- * cryptographic primitives is not always healthy.
- *
- * @param ecdsa ecdsa private key
- * @param ecdhe[OUT] ecdhe private key
- */
-void
-GNUNET_CRYPTO_ecdsa_private_to_ecdhe (const struct GNUNET_CRYPTO_EcdsaPrivateKey *ecdsa,
- struct GNUNET_CRYPTO_EcdhePrivateKey *ecdhe);
-
-
/**
* @ingroup crypto
* Extract the public key for the given private key.
void
GNUNET_CRYPTO_ecdsa_key_clear (struct GNUNET_CRYPTO_EcdsaPrivateKey *pk);
+
/**
* @ingroup crypto
* Clear memory that was used to store a private key.
const struct GNUNET_PeerIdentity *second);
+/**
+ * Internal structure used to cache pre-calculated values for DLOG calculation.
+ */
+struct GNUNET_CRYPTO_EccDlogContext;
+
+
+/**
+ * Point on a curve (always for Curve25519) encoded in a format suitable
+ * for network transmission (ECDH), see http://cr.yp.to/ecdh.html.
+ */
+struct GNUNET_CRYPTO_EccPoint
+{
+ /**
+ * Q consists of an x- and a y-value, each mod p (256 bits), given
+ * here in affine coordinates and Ed25519 standard compact format.
+ */
+ unsigned char q_y[256 / 8];
+};
+
+
+/**
+ * Do pre-calculation for ECC discrete logarithm for small factors.
+ *
+ * @param max maximum value the factor can be
+ * @param mem memory to use (should be smaller than @a max), must not be zero.
+ * @return @a max if dlog failed, otherwise the factor
+ */
+struct GNUNET_CRYPTO_EccDlogContext *
+GNUNET_CRYPTO_ecc_dlog_prepare (unsigned int max,
+ unsigned int mem);
+
+
+/**
+ * Calculate ECC discrete logarithm for small factors.
+ * Opposite of #GNUNET_CRYPTO_ecc_dexp().
+ *
+ * @param dlc precalculated values, determine range of factors
+ * @param input point on the curve to factor
+ * @return `dlc->max` if dlog failed, otherwise the factor
+ */
+int
+GNUNET_CRYPTO_ecc_dlog (struct GNUNET_CRYPTO_EccDlogContext *edc,
+ gcry_mpi_point_t input);
+
+
+/**
+ * Multiply the generator g of the elliptic curve by @a val
+ * to obtain the point on the curve representing @a val.
+ * Afterwards, point addition will correspond to integer
+ * addition. #GNUNET_CRYPTO_ecc_dlog() can be used to
+ * convert a point back to an integer (as long as the
+ * integer is smaller than the MAX of the @a edc context).
+ *
+ * @param edc calculation context for ECC operations
+ * @param val value to encode into a point
+ * @return representation of the value as an ECC point,
+ * must be freed using #GNUNET_CRYPTO_ecc_free()
+ */
+gcry_mpi_point_t
+GNUNET_CRYPTO_ecc_dexp (struct GNUNET_CRYPTO_EccDlogContext *edc,
+ int val);
+
+
+/**
+ * Multiply the generator g of the elliptic curve by @a val
+ * to obtain the point on the curve representing @a val.
+ *
+ * @param edc calculation context for ECC operations
+ * @param val (positive) value to encode into a point
+ * @return representation of the value as an ECC point,
+ * must be freed using #GNUNET_CRYPTO_ecc_free()
+ */
+gcry_mpi_point_t
+GNUNET_CRYPTO_ecc_dexp_mpi (struct GNUNET_CRYPTO_EccDlogContext *edc,
+ gcry_mpi_t val);
+
+
+/**
+ * Multiply the point @a p on the elliptic curve by @a val.
+ *
+ * @param edc calculation context for ECC operations
+ * @param p point to multiply
+ * @param val (positive) value to encode into a point
+ * @return representation of the value as an ECC point,
+ * must be freed using #GNUNET_CRYPTO_ecc_free()
+ */
+gcry_mpi_point_t
+GNUNET_CRYPTO_ecc_pmul_mpi (struct GNUNET_CRYPTO_EccDlogContext *edc,
+ gcry_mpi_point_t p,
+ gcry_mpi_t val);
+
+
+/**
+ * Convert point value to binary representation.
+ *
+ * @param edc calculation context for ECC operations
+ * @param point computational point representation
+ * @param[out] bin binary point representation
+ */
+void
+GNUNET_CRYPTO_ecc_point_to_bin (struct GNUNET_CRYPTO_EccDlogContext *edc,
+ gcry_mpi_point_t point,
+ struct GNUNET_CRYPTO_EccPoint *bin);
+
+
+/**
+ * Convert binary representation of a point to computational representation.
+ *
+ * @param edc calculation context for ECC operations
+ * @param bin binary point representation
+ * @return computational representation
+ */
+gcry_mpi_point_t
+GNUNET_CRYPTO_ecc_bin_to_point (struct GNUNET_CRYPTO_EccDlogContext *edc,
+ const struct GNUNET_CRYPTO_EccPoint *bin);
+
+
+/**
+ * Add two points on the elliptic curve.
+ *
+ * @param edc calculation context for ECC operations
+ * @param a some value
+ * @param b some value
+ * @return @a a + @a b, must be freed using #GNUNET_CRYPTO_ecc_free()
+ */
+gcry_mpi_point_t
+GNUNET_CRYPTO_ecc_add (struct GNUNET_CRYPTO_EccDlogContext *edc,
+ gcry_mpi_point_t a,
+ gcry_mpi_point_t b);
+
+
+/**
+ * Obtain a random point on the curve and its
+ * additive inverse. Both returned values
+ * must be freed using #GNUNET_CRYPTO_ecc_free().
+ *
+ * @param edc calculation context for ECC operations
+ * @param[out] r set to a random point on the curve
+ * @param[out] r_inv set to the additive inverse of @a r
+ */
+void
+GNUNET_CRYPTO_ecc_rnd (struct GNUNET_CRYPTO_EccDlogContext *edc,
+ gcry_mpi_point_t *r,
+ gcry_mpi_point_t *r_inv);
+
+
+/**
+ * Obtain a random scalar for point multiplication on the curve and
+ * its multiplicative inverse.
+ *
+ * @param edc calculation context for ECC operations
+ * @param[out] r set to a random scalar on the curve
+ * @param[out] r_inv set to the multiplicative inverse of @a r
+ */
+void
+GNUNET_CRYPTO_ecc_rnd_mpi (struct GNUNET_CRYPTO_EccDlogContext *edc,
+ gcry_mpi_t *r,
+ gcry_mpi_t *r_inv);
+
+
+/**
+ * Generate a random value mod n.
+ *
+ * @param edc ECC context
+ * @return random value mod n.
+ */
+gcry_mpi_t
+GNUNET_CRYPTO_ecc_random_mod_n (struct GNUNET_CRYPTO_EccDlogContext *edc);
+
+
+/**
+ * Free a point value returned by the API.
+ *
+ * @param p point to free
+ */
+void
+GNUNET_CRYPTO_ecc_free (gcry_mpi_point_t p);
+
+
+/**
+ * Release precalculated values.
+ *
+ * @param dlc dlog context
+ */
+void
+GNUNET_CRYPTO_ecc_dlog_release (struct GNUNET_CRYPTO_EccDlogContext *dlc);
+
+
/**
* @ingroup crypto
* Derive key material from a public and a private ECC key.
struct GNUNET_HashCode *key_material);
+/**
+ * @ingroup crypto
+ * Derive key material from a ECDH public key and a private EdDSA key.
+ * Dual to #GNUNET_CRRYPTO_ecdh_eddsa.
+ *
+ * @param priv private key from EdDSA to use for the ECDH (x)
+ * @param pub public key to use for the ECDH (yG)
+ * @param key_material where to write the key material H(h(x)yG)
+ * @return #GNUNET_SYSERR on error, #GNUNET_OK on success
+ */
+int
+GNUNET_CRYPTO_eddsa_ecdh (const struct GNUNET_CRYPTO_EddsaPrivateKey *priv,
+ const struct GNUNET_CRYPTO_EcdhePublicKey *pub,
+ struct GNUNET_HashCode *key_material);
+
+
+/**
+ * @ingroup crypto
+ * Derive key material from a EdDSA public key and a private ECDH key.
+ * Dual to #GNUNET_CRRYPTO_eddsa_ecdh.
+ *
+ * @param priv private key to use for the ECDH (y)
+ * @param pub public key from EdDSA to use for the ECDH (X=h(x)G)
+ * @param key_material where to write the key material H(yX)=H(h(x)yG)
+ * @return #GNUNET_SYSERR on error, #GNUNET_OK on success
+ */
+int
+GNUNET_CRYPTO_ecdh_eddsa (const struct GNUNET_CRYPTO_EcdhePrivateKey *priv,
+ const struct GNUNET_CRYPTO_EddsaPublicKey *pub,
+ struct GNUNET_HashCode *key_material);
+
+
/**
* @ingroup crypto
* EdDSA sign a given block.
*/
size_t
GNUNET_CRYPTO_rsa_private_key_encode (const struct GNUNET_CRYPTO_rsa_PrivateKey *key,
- char **buffer);
+ char **buffer);
/**
*/
struct GNUNET_CRYPTO_rsa_PrivateKey *
GNUNET_CRYPTO_rsa_private_key_decode (const char *buf,
- size_t len);
+ size_t len);
+
+
+/**
+ * Duplicate the given private key
+ *
+ * @param key the private key to duplicate
+ * @return the duplicate key; NULL upon error
+ */
+struct GNUNET_CRYPTO_rsa_PrivateKey *
+GNUNET_CRYPTO_rsa_private_key_dup (const struct GNUNET_CRYPTO_rsa_PrivateKey *key);
/**
struct GNUNET_HashCode *hc);
+/**
+ * Obtain the length of the RSA key in bits.
+ *
+ * @param key the public key to introspect
+ * @return length of the key in bits
+ */
+unsigned int
+GNUNET_CRYPTO_rsa_public_key_len (const struct GNUNET_CRYPTO_rsa_PublicKey *key);
+
+
/**
* Free memory occupied by the public key.
*
*/
size_t
GNUNET_CRYPTO_rsa_public_key_encode (const struct GNUNET_CRYPTO_rsa_PublicKey *key,
- char **buffer);
+ char **buffer);
/**
*/
struct GNUNET_CRYPTO_rsa_PublicKey *
GNUNET_CRYPTO_rsa_public_key_decode (const char *buf,
- size_t len);
+ size_t len);
+
+
+/**
+ * Duplicate the given public key
+ *
+ * @param key the public key to duplicate
+ * @return the duplicate key; NULL upon error
+ */
+struct GNUNET_CRYPTO_rsa_PublicKey *
+GNUNET_CRYPTO_rsa_public_key_dup (const struct GNUNET_CRYPTO_rsa_PublicKey *key);
/**
GNUNET_CRYPTO_rsa_blinding_key_create (unsigned int len);
+/**
+ * Compare the values of two blinding keys.
+ *
+ * @param b1 one key
+ * @param b2 the other key
+ * @return 0 if the two are equal
+ */
+int
+GNUNET_CRYPTO_rsa_blinding_key_cmp (struct GNUNET_CRYPTO_rsa_BlindingKey *b1,
+ struct GNUNET_CRYPTO_rsa_BlindingKey *b2);
+
+
+/**
+ * Compare the values of two signatures.
+ *
+ * @param s1 one signature
+ * @param s2 the other signature
+ * @return 0 if the two are equal
+ */
+int
+GNUNET_CRYPTO_rsa_signature_cmp (struct GNUNET_CRYPTO_rsa_Signature *s1,
+ struct GNUNET_CRYPTO_rsa_Signature *s2);
+
+/**
+ * Compare the values of two private keys.
+ *
+ * @param p1 one private key
+ * @param p2 the other private key
+ * @return 0 if the two are equal
+ */
+int
+GNUNET_CRYPTO_rsa_private_key_cmp (struct GNUNET_CRYPTO_rsa_PrivateKey *p1,
+ struct GNUNET_CRYPTO_rsa_PrivateKey *p2);
+
+
+/**
+ * Compare the values of two public keys.
+ *
+ * @param p1 one public key
+ * @param p2 the other public key
+ * @return 0 if the two are equal
+ */
+int
+GNUNET_CRYPTO_rsa_public_key_cmp (struct GNUNET_CRYPTO_rsa_PublicKey *p1,
+ struct GNUNET_CRYPTO_rsa_PublicKey *p2);
+
+
/**
* Destroy a blinding key
*
/**
* Free memory occupied by signature.
*
- * @param sig memory to freee
+ * @param sig memory to free
*/
void
GNUNET_CRYPTO_rsa_signature_free (struct GNUNET_CRYPTO_rsa_Signature *sig);
*/
size_t
GNUNET_CRYPTO_rsa_signature_encode (const struct GNUNET_CRYPTO_rsa_Signature *sig,
- char **buffer);
+ char **buffer);
/**
*/
struct GNUNET_CRYPTO_rsa_Signature *
GNUNET_CRYPTO_rsa_signature_decode (const char *buf,
- size_t len);
+ size_t len);
+
+
+/**
+ * Duplicate the given rsa signature
+ *
+ * @param sig the signature to duplicate
+ * @return the duplicate key; NULL upon error
+ */
+struct GNUNET_CRYPTO_rsa_Signature *
+GNUNET_CRYPTO_rsa_signature_dup (const struct GNUNET_CRYPTO_rsa_Signature *sig);
/**
*/
struct GNUNET_CRYPTO_rsa_Signature *
GNUNET_CRYPTO_rsa_unblind (struct GNUNET_CRYPTO_rsa_Signature *sig,
- struct GNUNET_CRYPTO_rsa_BlindingKey *bkey,
- struct GNUNET_CRYPTO_rsa_PublicKey *pkey);
+ struct GNUNET_CRYPTO_rsa_BlindingKey *bkey,
+ struct GNUNET_CRYPTO_rsa_PublicKey *pkey);
/**
*/
int
GNUNET_CRYPTO_rsa_verify (const struct GNUNET_HashCode *hash,
- const struct GNUNET_CRYPTO_rsa_Signature *sig,
- const struct GNUNET_CRYPTO_rsa_PublicKey *public_key);
+ const struct GNUNET_CRYPTO_rsa_Signature *sig,
+ const struct GNUNET_CRYPTO_rsa_PublicKey *public_key);
#if 0 /* keep Emacsens' auto-indent happy */
projects / oweals / gnunet.git / blobdiff