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update pmeth/ameth

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Zhi Guan
2018-11-28 16:15:06 +08:00
parent 9fe7aa1280
commit 5f3bb5c346
22 changed files with 1065 additions and 5223 deletions
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98
crypto/paillier/pai_lib.c
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@@ -81,7 +81,7 @@ void PAILLIER_free(PAILLIER *key)
int PAILLIER_size(const PAILLIER *key)
{
return BN_num_bits(key->n)/8;
return (BN_num_bits(key->n) * 2)/8;
}
int PAILLIER_security_bits(const PAILLIER *key)
@@ -100,57 +100,60 @@ int PAILLIER_generate_key(PAILLIER *key, int bits)
q = BN_new();
bn_ctx = BN_CTX_new();
if (!key->n) key->n = BN_new();
if (!key->lambda) key->lambda = BN_new();
if (!key->n_squared) key->n_squared = BN_new();
if (!key->n_plusone) key->n_plusone = BN_new();
if (!key->x) key->x = BN_new();
if (!key->n)
key->n = BN_new();
if (!key->lambda)
key->lambda = BN_new();
if (!key->n_squared)
key->n_squared = BN_new();
if (!key->n_plusone)
key->n_plusone = BN_new();
if (!key->x)
key->x = BN_new();
if (!p || !q || !bn_ctx || !key->n || !key->lambda ||
!key->n_squared || !key->n_plusone || !key->x) {
PAILLIERerr(PAILLIER_F_PAILLIER_GENERATE_KEY, ERR_R_MALLOC_FAILURE);
goto end;
}
key->bits = bits;
do {
if (!BN_generate_prime_ex(p, bits, 0, NULL, NULL, NULL)) {
if (!BN_generate_prime_ex(p, bits/2, 0, NULL, NULL, NULL)) {
PAILLIERerr(PAILLIER_F_PAILLIER_GENERATE_KEY,
PAILLIER_R_GENERATE_PRIME_FAILED);
goto end;
}
if (!BN_generate_prime_ex(q, bits, 0, NULL, NULL, NULL)) {
if (!BN_generate_prime_ex(q, bits/2, 0, NULL, NULL, NULL)) {
PAILLIERerr(PAILLIER_F_PAILLIER_GENERATE_KEY,
PAILLIER_R_GENERATE_PRIME_FAILED);
goto end;
}
if (!BN_mul(key->n, p, q, bn_ctx)) {
if (!BN_mul(key->n, p, q, bn_ctx)
|| !BN_sub_word(p, 1)
|| !BN_sub_word(q, 1)
/* lambda = (p - 1)*(q - 1) */
|| !BN_mul(key->lambda, p, q, bn_ctx)
/* n_squared = n^2 */
|| !BN_sqr(key->n_squared, key->n, bn_ctx)
/* n_plusone = n + 1 */
|| !BN_copy(key->n_plusone, key->n)
|| !BN_add_word(key->n_plusone, 1)
#if 0
/* x = (((g^lambda mod n^2) - 1)/n)^-1 mod n */
|| !BN_mod_exp(key->x, key->n_plusone, key->lambda, key->n_squared, bn_ctx)
|| !BN_sub_word(key->x, 1)
|| !BN_div(key->x, key->x, key->n)
|| !BN_mod_inverse(key->x, key->x, key->n, bn_ctx)
#endif
) {
PAILLIERerr(PAILLIER_F_PAILLIER_GENERATE_KEY, ERR_R_BN_LIB);
goto end;
}
if (!BN_sub_word(p, 1)) {
goto end;
}
if (!BN_sub_word(q, 1)) {
goto end;
}
if (!BN_mul(key->lambda, p, q, bn_ctx)) {
goto end;
}
BN_sqr(key->n_squared, key->n, bn_ctx);
BN_copy(key->n_plusone, key->n);
BN_add_word(key->n_plusone, 1);
/*
BN_mod_exp(key->x, key->n_plusone, key->lambda, key->n_squared, bn_ctx);
BN_sub_word(key->x, 1);
BN_div(key->x, key->x, key->n);
BN_mod_inverse(key->x, key->x, key->n, bn_ctx);
*/
} while (0);
ret = 1;
@@ -173,6 +176,9 @@ int PAILLIER_encrypt(BIGNUM *c, const BIGNUM *m, PAILLIER *pub_key)
BIGNUM *r = NULL;
BN_CTX *bn_ctx = NULL;
fprintf(stderr, "%s %d: m = %s\n", __FILE__, __LINE__, BN_bn2hex(m));
if (BN_cmp(m, pub_key->n) >= 0) {
PAILLIERerr(PAILLIER_F_PAILLIER_ENCRYPT, PAILLIER_R_INVALID_PLAINTEXT);
goto end;
@@ -249,22 +255,54 @@ int PAILLIER_decrypt(BIGNUM *m, const BIGNUM *c, PAILLIER *key)
PAILLIERerr(PAILLIER_F_PAILLIER_DECRYPT, ERR_R_BN_LIB);
goto end;
}
/*
printf("m = %s\n", BN_bn2hex(m));
printf("c = %s\n", BN_bn2hex(c));
printf("lambda = %s\n", BN_bn2hex(key->lambda));
printf("n^2 = %s\n", BN_bn2hex(key->n_squared));
*/
if (!key->n_squared) {
if (!(key->n_squared = BN_new())) {
PAILLIERerr(PAILLIER_F_PAILLIER_DECRYPT, ERR_R_MALLOC_FAILURE);
goto end;
}
if (!BN_sqr(key->n_squared, key->n, bn_ctx)) {
PAILLIERerr(PAILLIER_F_PAILLIER_DECRYPT, ERR_R_BN_LIB);
goto end;
}
}
fprintf(stderr, "%s %d: m = %s\n", __FILE__, __LINE__, BN_bn2hex(m));
if (!BN_mod_exp(m, c, key->lambda, key->n_squared, bn_ctx)) {
PAILLIERerr(PAILLIER_F_PAILLIER_DECRYPT, ERR_R_BN_LIB);
goto end;
}
fprintf(stderr, "%s %d: m = %s\n", __FILE__, __LINE__, BN_bn2hex(m));
if (!BN_sub_word(m, 1)) {
PAILLIERerr(PAILLIER_F_PAILLIER_DECRYPT, ERR_R_BN_LIB);
goto end;
}
fprintf(stderr, "%s %d: m = %s\n", __FILE__, __LINE__, BN_bn2hex(m));
if (!BN_div(m, NULL, m, key->n, bn_ctx)) {
PAILLIERerr(PAILLIER_F_PAILLIER_DECRYPT, ERR_R_BN_LIB);
goto end;
}
fprintf(stderr, "%s %d: m = %s\n", __FILE__, __LINE__, BN_bn2hex(m));
if (!BN_mod_mul(m, m, key->x, key->n, bn_ctx)) {
PAILLIERerr(PAILLIER_F_PAILLIER_DECRYPT, ERR_R_BN_LIB);
goto end;
}
printf("m = %s\n", BN_bn2hex(m));
ret = 1;
end:
BN_CTX_free(bn_ctx);