BeeCrypt
4.2.1
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ElGamal algorithm. More...
#include "beecrypt/mpbarrett.h"
Go to the source code of this file.
Functions | |
int | elgv1sign (const mpbarrett *p, const mpbarrett *n, const mpnumber *g, randomGeneratorContext *, const mpnumber *hm, const mpnumber *x, mpnumber *r, mpnumber *s) |
This function performs raw ElGamal signing, variant 1. More... | |
int | elgv3sign (const mpbarrett *p, const mpbarrett *n, const mpnumber *g, randomGeneratorContext *, const mpnumber *hm, const mpnumber *x, mpnumber *r, mpnumber *s) |
This function performs raw ElGamal signing, variant 3. More... | |
int | elgv1vrfy (const mpbarrett *p, const mpbarrett *n, const mpnumber *g, const mpnumber *hm, const mpnumber *y, const mpnumber *r, const mpnumber *s) |
This function performs raw ElGamal verification, variant 1. More... | |
int | elgv3vrfy (const mpbarrett *p, const mpbarrett *n, const mpnumber *g, const mpnumber *hm, const mpnumber *y, const mpnumber *r, const mpnumber *s) |
This function performs raw ElGamal verification, variant 3. More... | |
ElGamal algorithm.
For more information on this algorithm, see: "Handbook of Applied Cryptography", 11.5.2: "The ElGamal signature scheme", p. 454-459
Two of the signature variants in Note 11.70 are implemented.
int elgv1sign | ( | const mpbarrett * | p, |
const mpbarrett * | n, | ||
const mpnumber * | g, | ||
randomGeneratorContext * | rgc, | ||
const mpnumber * | hm, | ||
const mpnumber * | x, | ||
mpnumber * | r, | ||
mpnumber * | s | ||
) |
This function performs raw ElGamal signing, variant 1.
Signing equations:
p | The prime. |
n | The reducer mod (p-1). |
g | The generator. |
rgc | The pseudo-random generat |
hm | The hash to be signed. |
x | The private key value. |
r | The signature's r value. |
s | The signature's s value. |
0 | on success. |
-1 | on failure. |
int elgv1vrfy | ( | const mpbarrett * | p, |
const mpbarrett * | n, | ||
const mpnumber * | g, | ||
const mpnumber * | hm, | ||
const mpnumber * | y, | ||
const mpnumber * | r, | ||
const mpnumber * | s | ||
) |
This function performs raw ElGamal verification, variant 1.
Verifying equations:
p | The prime. |
n | The reducer mod (p-1). |
g | The generator. |
hm | The hash to be signed. |
y | The public key value. |
r | The signature's r value. |
s | The signature's s value. |
1 | on success. |
0 | on failure. |
int elgv3sign | ( | const mpbarrett * | p, |
const mpbarrett * | n, | ||
const mpnumber * | g, | ||
randomGeneratorContext * | rgc, | ||
const mpnumber * | hm, | ||
const mpnumber * | x, | ||
mpnumber * | r, | ||
mpnumber * | s | ||
) |
This function performs raw ElGamal signing, variant 3.
Signing equations:
p | The prime. |
n | The reducer mod (p-1). |
g | The generator. |
rgc | The pseudo-random generat |
hm | The hash to be signed. |
x | The private key value. |
r | The signature's r value. |
s | The signature's s value. |
0 | on success. |
-1 | on failure. |
int elgv3vrfy | ( | const mpbarrett * | p, |
const mpbarrett * | n, | ||
const mpnumber * | g, | ||
const mpnumber * | hm, | ||
const mpnumber * | y, | ||
const mpnumber * | r, | ||
const mpnumber * | s | ||
) |
This function performs raw ElGamal verification, variant 3.
Verifying equations:
p | The prime. |
n | The reducer mod (p-1). |
g | The generator. |
hm | The hash to be signed. |
y | The public key value. |
r | The signature's r value. |
s | The signature's s value. |
1 | on success. |
0 | on failure. |