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Store NTT A of BLISS public key a

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This commit is contained in:
Andreas Steffen
2014-11-29 14:51:17 +01:00
parent 3e1f6edc5a
commit 5a50e364e6
2 changed files with 24 additions and 28 deletions
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src/libstrongswan/plugins/bliss/bliss_private_key.c
+17 -20
View File
@@ -58,9 +58,9 @@ struct private_bliss_private_key_t {
int8_t *s2;
/**
* BLISS public key a (coefficients of polynomial (2g + 1)/f)
* NTT of BLISS public key a (coefficients of polynomial (2g + 1)/f)
*/
uint32_t *a;
uint32_t *A;
/**
* reference count
@@ -115,7 +115,7 @@ static bool sign_bliss_with_sha512(private_bliss_private_key_t *this,
bliss_sampler_t *sampler = NULL;
uint8_t seed_buf[32], data_hash_buf[HASH_SIZE_SHA512];
uint16_t q, q2, p, p2, *c_indices, tests = 0;
uint32_t *A, *ay;
uint32_t *ay;
int32_t *y1, *y2, *z1, *z2, *u, *s1c, *s2c;
int32_t y1_min, y1i, y1_max, y2_min, y2i, y2_max, scalar, norm, ui;
int16_t *ud, *uz2d, *z2d, value;
@@ -167,7 +167,6 @@ static bool sign_bliss_with_sha512(private_bliss_private_key_t *this,
p = this->set->p;
q2 = 2 * q;
p2 = p / 2;
A = malloc(n * sizeof(uint32_t));
ay = malloc(n * sizeof(uint32_t));
z2 = malloc(n * sizeof(int32_t));
s1c = malloc(n * sizeof(int32_t));
@@ -182,7 +181,6 @@ static bool sign_bliss_with_sha512(private_bliss_private_key_t *this,
ud = z2d;
fft = bliss_fft_create(this->set->fft_params);
fft->transform(fft, this->a, A, FALSE);
while (true)
{
@@ -260,7 +258,7 @@ static bool sign_bliss_with_sha512(private_bliss_private_key_t *this,
for (i = 0; i < n; i++)
{
ay[i] = (A[i] * ay[i]) % q;
ay[i] = (this->A[i] * ay[i]) % q;
}
fft->transform(fft, ay, ay, TRUE);
@@ -384,7 +382,6 @@ end:
sig->destroy(sig);
fft->destroy(fft);
rng->destroy(rng);
free(A);
free(ay);
free(z2);
free(s1c);
@@ -431,7 +428,7 @@ METHOD(private_key_t, get_public_key, public_key_t*,
public_key_t *public;
chunk_t pubkey;
pubkey = bliss_public_key_info_encode(this->set->oid, this->a, this->set->n);
pubkey = bliss_public_key_info_encode(this->set->oid, this->A, this->set->n);
public = lib->creds->create(lib->creds, CRED_PUBLIC_KEY, KEY_BLISS,
BUILD_BLOB_ASN1_DER, pubkey, BUILD_END);
free(pubkey.ptr);
@@ -451,7 +448,7 @@ METHOD(private_key_t, get_encoding, bool,
chunk_t s1_chunk, s2_chunk, pubkey;
bool success = TRUE;
pubkey = bliss_public_key_encode(this->a, this->set->n);
pubkey = bliss_public_key_encode(this->A, this->set->n);
/* Build private key as two polynomials with 8 bit coefficients */
s1_chunk = chunk_create(this->s1, this->set->n);
@@ -488,7 +485,7 @@ METHOD(private_key_t, get_fingerprint, bool,
{
return TRUE;
}
success = bliss_public_key_fingerprint(this->set->oid, this->a,
success = bliss_public_key_fingerprint(this->set->oid, this->A,
this->set->n, type, fp);
lib->encoding->cache(lib->encoding, type, this, *fp);
@@ -510,7 +507,7 @@ METHOD(private_key_t, destroy, void,
lib->encoding->clear_cache(lib->encoding, this);
free(this->s1);
free(this->s2);
free(this->a);
free(this->A);
free(this);
}
}
@@ -822,7 +819,7 @@ bliss_private_key_t *bliss_private_key_gen(key_type_t type, va_list args)
private_bliss_private_key_t *this;
u_int key_size = 1;
int i, n, trials = 0;
uint32_t *A, *S1, *S2;
uint32_t *S1, *S2, *a;
uint16_t q;
bool success = FALSE;
bliss_param_set_t *set;
@@ -870,8 +867,8 @@ bliss_private_key_t *bliss_private_key_gen(key_type_t type, va_list args)
/* Some vectors needed to derive the publi key */
S1 = malloc(n * sizeof(uint32_t));
S2 = malloc(n * sizeof(uint32_t));
A = malloc(n * sizeof(uint32_t));
this->a = malloc(n * sizeof(uint32_t));
a = malloc(n * sizeof(uint32_t));
this->A = malloc(n * sizeof(uint32_t));
/* Instantiate a true random generator */
rng = lib->crypto->create_rng(lib->crypto, RNG_TRUE);
@@ -906,8 +903,8 @@ bliss_private_key_t *bliss_private_key_gen(key_type_t type, va_list args)
success = FALSE;
break;
}
A[i] = invert(S1[i], q);
A[i] = (S2[i] * A[i]) % q;
this->A[i] = invert(S1[i], q);
this->A[i] = (S2[i] * this->A[i]) % q;
}
}
while (!success && trials < SECRET_KEY_TRIALS_MAX);
@@ -917,13 +914,13 @@ bliss_private_key_t *bliss_private_key_gen(key_type_t type, va_list args)
if (success)
{
fft->transform(fft, A, this->a, TRUE);
fft->transform(fft, this->A, a, TRUE);
DBG4(DBG_LIB, " i f g a F G A");
for (i = 0; i < n; i++)
{
DBG4(DBG_LIB, "%4d %3d %3d %5u %5u %5u %5u",
i, this->s1[i], this->s2[i], this->a[i], S1[i], S2[i], A[i]);
i, this->s1[i], this->s2[i], a[i], S1[i], S2[i], this->A[i]);
}
}
else
@@ -934,9 +931,9 @@ bliss_private_key_t *bliss_private_key_gen(key_type_t type, va_list args)
/* Cleanup */
fft->destroy(fft);
rng->destroy(rng);
free(A);
free(S1);
free(S2);
free(a);
return success ? &this->public : NULL;
}
@@ -1013,7 +1010,7 @@ bliss_private_key_t *bliss_private_key_load(key_type_t type, va_list args)
{
goto end;
}
this->a = bliss_public_key_from_asn1(object, this->set->n);
this->A = bliss_public_key_from_asn1(object, this->set->n);
break;
case PRIV_KEY_SECRET1:
if (object.len != this->set->n)
src/libstrongswan/plugins/bliss/bliss_public_key.c
+7 -8
View File
@@ -40,9 +40,9 @@ struct private_bliss_public_key_t {
bliss_param_set_t *set;
/**
* BLISS public key a (coefficients of polynomial (2g + 1)/f)
* NTT of BLISS public key a (coefficients of polynomial (2g + 1)/f)
*/
uint32_t *a;
uint32_t *A;
/**
* reference counter
@@ -116,12 +116,11 @@ static bool verify_bliss_with_sha512(private_bliss_public_key_t *this,
az[i] = z1[i] < 0 ? q + z1[i] : z1[i];
}
fft = bliss_fft_create(this->set->fft_params);
fft->transform(fft, this->a, A, FALSE);
fft->transform(fft, az, az, FALSE);
for (i = 0; i < n; i++)
{
az[i] = (A[i] * az[i]) % q;
az[i] = (this->A[i] * az[i]) % q;
}
fft->transform(fft, az, az, TRUE);
@@ -221,7 +220,7 @@ METHOD(public_key_t, get_encoding, bool,
{
bool success = TRUE;
*encoding = bliss_public_key_info_encode(this->set->oid, this->a, this->set->n);
*encoding = bliss_public_key_info_encode(this->set->oid, this->A, this->set->n);
if (type != PUBKEY_SPKI_ASN1_DER)
{
@@ -244,7 +243,7 @@ METHOD(public_key_t, get_fingerprint, bool,
{
return TRUE;
}
success = bliss_public_key_fingerprint(this->set->oid, this->a,
success = bliss_public_key_fingerprint(this->set->oid, this->A,
this->set->n, type, fp);
lib->encoding->cache(lib->encoding, type, this, *fp);
@@ -264,7 +263,7 @@ METHOD(public_key_t, destroy, void,
if (ref_put(&this->ref))
{
lib->encoding->clear_cache(lib->encoding, this);
free(this->a);
free(this->A);
free(this);
}
}
@@ -376,7 +375,7 @@ bliss_public_key_t *bliss_public_key_load(key_type_t type, va_list args)
{
goto end;
}
this->a = bliss_public_key_from_asn1(object, this->set->n);
this->A = bliss_public_key_from_asn1(object, this->set->n);
break;
}
}