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Merge pull request #299 from Ko-/newhope-v1.1

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Add domain separation to NewHope
This commit is contained in:
Thom Wiggers 2020-05-29 23:18:55 +02:00 committed by GitHub
commit 8db3ba1ee1
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
12 changed files with 50 additions and 38 deletions
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2
crypto_kem/newhope1024cca/META.yml
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@ -6,7 +6,7 @@ length-public-key: 1824
length-secret-key: 3680
length-ciphertext: 2208
length-shared-secret: 32
nistkat-sha256: 8500b88222b3a62e57a6ecaac57f79258f08af49211e0c3f2ca7eab8089c0ce0
nistkat-sha256: 4a21f329bb5402a90d343af01ec1c8bc8ffffa8098cb0b89e1d2129f5157a073
principal-submitters:
- Thomas Pöppelmann
auxiliary-submitters:

5
crypto_kem/newhope1024cca/clean/cpapke.c
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@ -101,8 +101,9 @@ void PQCLEAN_NEWHOPE1024CCA_CLEAN_cpapke_keypair(unsigned char *pk,
unsigned char *publicseed = z;
unsigned char *noiseseed = z + NEWHOPE_SYMBYTES;
randombytes(z, NEWHOPE_SYMBYTES);
shake256(z, 2 * NEWHOPE_SYMBYTES, z, NEWHOPE_SYMBYTES);
z[0] = 0x01;
randombytes(z + 1, NEWHOPE_SYMBYTES);
shake256(z, 2 * NEWHOPE_SYMBYTES, z, NEWHOPE_SYMBYTES + 1);
gen_a(&ahat, publicseed);

25
crypto_kem/newhope1024cca/clean/kem.c
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@ -52,16 +52,18 @@ int PQCLEAN_NEWHOPE1024CCA_CLEAN_crypto_kem_keypair(unsigned char *pk, unsigned
**************************************************/
int PQCLEAN_NEWHOPE1024CCA_CLEAN_crypto_kem_enc(unsigned char *ct, unsigned char *ss, const unsigned char *pk) {
unsigned char k_coins_d[3 * NEWHOPE_SYMBYTES]; /* Will contain key, coins, qrom-hash */
unsigned char buf[2 * NEWHOPE_SYMBYTES];
unsigned char buf[2 * NEWHOPE_SYMBYTES + 1];
int i;
randombytes(buf, NEWHOPE_SYMBYTES);
buf[0] = 0x04;
randombytes(buf + 1, NEWHOPE_SYMBYTES);
shake256(buf, NEWHOPE_SYMBYTES, buf, NEWHOPE_SYMBYTES); /* Don't release system RNG output */
shake256(buf + NEWHOPE_SYMBYTES, NEWHOPE_SYMBYTES, pk, NEWHOPE_CCAKEM_PUBLICKEYBYTES); /* Multitarget countermeasure for coins + contributory KEM */
shake256(k_coins_d, 3 * NEWHOPE_SYMBYTES, buf, 2 * NEWHOPE_SYMBYTES);
shake256(buf + 1, NEWHOPE_SYMBYTES, buf, NEWHOPE_SYMBYTES + 1); /* Don't release system RNG output */
shake256(buf + 1 + NEWHOPE_SYMBYTES, NEWHOPE_SYMBYTES, pk, NEWHOPE_CCAKEM_PUBLICKEYBYTES); /* Multitarget countermeasure for coins + contributory KEM */
buf[0] = 0x08;
shake256(k_coins_d, 3 * NEWHOPE_SYMBYTES, buf, 2 * NEWHOPE_SYMBYTES + 1);
PQCLEAN_NEWHOPE1024CCA_CLEAN_cpapke_enc(ct, buf, pk, k_coins_d + NEWHOPE_SYMBYTES); /* coins are in k_coins_d+NEWHOPE_SYMBYTES */
PQCLEAN_NEWHOPE1024CCA_CLEAN_cpapke_enc(ct, buf + 1, pk, k_coins_d + NEWHOPE_SYMBYTES); /* coins are in k_coins_d+NEWHOPE_SYMBYTES */
for (i = 0; i < NEWHOPE_SYMBYTES; i++) {
ct[i + NEWHOPE_CPAPKE_CIPHERTEXTBYTES] = k_coins_d[i + 2 * NEWHOPE_SYMBYTES]; /* copy Targhi-Unruh hash into ct */
@ -89,18 +91,19 @@ int PQCLEAN_NEWHOPE1024CCA_CLEAN_crypto_kem_enc(unsigned char *ct, unsigned char
int PQCLEAN_NEWHOPE1024CCA_CLEAN_crypto_kem_dec(unsigned char *ss, const unsigned char *ct, const unsigned char *sk) {
int i, fail;
unsigned char ct_cmp[NEWHOPE_CCAKEM_CIPHERTEXTBYTES];
unsigned char buf[2 * NEWHOPE_SYMBYTES];
unsigned char buf[2 * NEWHOPE_SYMBYTES + 1];
unsigned char k_coins_d[3 * NEWHOPE_SYMBYTES]; /* Will contain key, coins, qrom-hash */
const unsigned char *pk = sk + NEWHOPE_CPAPKE_SECRETKEYBYTES;
PQCLEAN_NEWHOPE1024CCA_CLEAN_cpapke_dec(buf, ct, sk);
buf[0] = 0x08;
PQCLEAN_NEWHOPE1024CCA_CLEAN_cpapke_dec(buf + 1, ct, sk);
for (i = 0; i < NEWHOPE_SYMBYTES; i++) { /* Use hash of pk stored in sk */
buf[NEWHOPE_SYMBYTES + i] = sk[NEWHOPE_CCAKEM_SECRETKEYBYTES - 2 * NEWHOPE_SYMBYTES + i];
buf[1 + NEWHOPE_SYMBYTES + i] = sk[NEWHOPE_CCAKEM_SECRETKEYBYTES - 2 * NEWHOPE_SYMBYTES + i];
}
shake256(k_coins_d, 3 * NEWHOPE_SYMBYTES, buf, 2 * NEWHOPE_SYMBYTES);
shake256(k_coins_d, 3 * NEWHOPE_SYMBYTES, buf, 2 * NEWHOPE_SYMBYTES + 1);
PQCLEAN_NEWHOPE1024CCA_CLEAN_cpapke_enc(ct_cmp, buf, pk, k_coins_d + NEWHOPE_SYMBYTES); /* coins are in k_coins_d+NEWHOPE_SYMBYTES */
PQCLEAN_NEWHOPE1024CCA_CLEAN_cpapke_enc(ct_cmp, buf + 1, pk, k_coins_d + NEWHOPE_SYMBYTES); /* coins are in k_coins_d+NEWHOPE_SYMBYTES */
for (i = 0; i < NEWHOPE_SYMBYTES; i++) {
ct_cmp[i + NEWHOPE_CPAPKE_CIPHERTEXTBYTES] = k_coins_d[i + 2 * NEWHOPE_SYMBYTES];

2
crypto_kem/newhope1024cpa/META.yml
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@ -6,7 +6,7 @@ length-public-key: 1824
length-secret-key: 1792
length-ciphertext: 2176
length-shared-secret: 32
nistkat-sha256: f48b42b21a51d7f9325abc5fbda74872d62feaa8cbf818bee87f29bf96630a2f
nistkat-sha256: 440e2afb40d212a44d1bb1dc9963d7c942fa6ceb16fed2b1ccf015fa75ab115b
principal-submitters:
- Thomas Pöppelmann
auxiliary-submitters:

5
crypto_kem/newhope1024cpa/clean/cpapke.c
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@ -101,8 +101,9 @@ void PQCLEAN_NEWHOPE1024CPA_CLEAN_cpapke_keypair(unsigned char *pk,
unsigned char *publicseed = z;
unsigned char *noiseseed = z + NEWHOPE_SYMBYTES;
randombytes(z, NEWHOPE_SYMBYTES);
shake256(z, 2 * NEWHOPE_SYMBYTES, z, NEWHOPE_SYMBYTES);
z[0] = 0x01;
randombytes(z + 1, NEWHOPE_SYMBYTES);
shake256(z, 2 * NEWHOPE_SYMBYTES, z, NEWHOPE_SYMBYTES + 1);
gen_a(&ahat, publicseed);

5
crypto_kem/newhope1024cpa/clean/kem.c
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@ -39,9 +39,10 @@ int PQCLEAN_NEWHOPE1024CPA_CLEAN_crypto_kem_keypair(unsigned char *pk, unsigned
int PQCLEAN_NEWHOPE1024CPA_CLEAN_crypto_kem_enc(unsigned char *ct, unsigned char *ss, const unsigned char *pk) {
unsigned char buf[2 * NEWHOPE_SYMBYTES];
randombytes(buf, NEWHOPE_SYMBYTES);
buf[0] = 0x02;
randombytes(buf + 1, NEWHOPE_SYMBYTES);
shake256(buf, 2 * NEWHOPE_SYMBYTES, buf, NEWHOPE_SYMBYTES); /* Don't release system RNG output */
shake256(buf, 2 * NEWHOPE_SYMBYTES, buf, NEWHOPE_SYMBYTES + 1); /* Don't release system RNG output */
PQCLEAN_NEWHOPE1024CPA_CLEAN_cpapke_enc(ct, buf, pk, buf + NEWHOPE_SYMBYTES); /* coins are in buf+NEWHOPE_SYMBYTES */

2
crypto_kem/newhope512cca/META.yml
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@ -6,7 +6,7 @@ length-public-key: 928
length-secret-key: 1888
length-ciphertext: 1120
length-shared-secret: 32
nistkat-sha256: 5b0389f8d9c30055ad0fb83da540ca36969dde041bebe6f1018c37768c5e1479
nistkat-sha256: 4290da64305e70e65766be5d4e488dee2b4b238172876ceefc931934b6964a7d
principal-submitters:
- Thomas Pöppelmann
auxiliary-submitters:

5
crypto_kem/newhope512cca/clean/cpapke.c
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@ -101,8 +101,9 @@ void PQCLEAN_NEWHOPE512CCA_CLEAN_cpapke_keypair(unsigned char *pk,
unsigned char *publicseed = z;
unsigned char *noiseseed = z + NEWHOPE_SYMBYTES;
randombytes(z, NEWHOPE_SYMBYTES);
shake256(z, 2 * NEWHOPE_SYMBYTES, z, NEWHOPE_SYMBYTES);
z[0] = 0x01;
randombytes(z + 1, NEWHOPE_SYMBYTES);
shake256(z, 2 * NEWHOPE_SYMBYTES, z, NEWHOPE_SYMBYTES + 1);
gen_a(&ahat, publicseed);

25
crypto_kem/newhope512cca/clean/kem.c
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@ -52,16 +52,18 @@ int PQCLEAN_NEWHOPE512CCA_CLEAN_crypto_kem_keypair(unsigned char *pk, unsigned c
**************************************************/
int PQCLEAN_NEWHOPE512CCA_CLEAN_crypto_kem_enc(unsigned char *ct, unsigned char *ss, const unsigned char *pk) {
unsigned char k_coins_d[3 * NEWHOPE_SYMBYTES]; /* Will contain key, coins, qrom-hash */
unsigned char buf[2 * NEWHOPE_SYMBYTES];
unsigned char buf[2 * NEWHOPE_SYMBYTES + 1];
int i;
randombytes(buf, NEWHOPE_SYMBYTES);
buf[0] = 0x04;
randombytes(buf + 1, NEWHOPE_SYMBYTES);
shake256(buf, NEWHOPE_SYMBYTES, buf, NEWHOPE_SYMBYTES); /* Don't release system RNG output */
shake256(buf + NEWHOPE_SYMBYTES, NEWHOPE_SYMBYTES, pk, NEWHOPE_CCAKEM_PUBLICKEYBYTES); /* Multitarget countermeasure for coins + contributory KEM */
shake256(k_coins_d, 3 * NEWHOPE_SYMBYTES, buf, 2 * NEWHOPE_SYMBYTES);
shake256(buf + 1, NEWHOPE_SYMBYTES, buf, NEWHOPE_SYMBYTES + 1); /* Don't release system RNG output */
shake256(buf + 1 + NEWHOPE_SYMBYTES, NEWHOPE_SYMBYTES, pk, NEWHOPE_CCAKEM_PUBLICKEYBYTES); /* Multitarget countermeasure for coins + contributory KEM */
buf[0] = 0x08;
shake256(k_coins_d, 3 * NEWHOPE_SYMBYTES, buf, 2 * NEWHOPE_SYMBYTES + 1);
PQCLEAN_NEWHOPE512CCA_CLEAN_cpapke_enc(ct, buf, pk, k_coins_d + NEWHOPE_SYMBYTES); /* coins are in k_coins_d+NEWHOPE_SYMBYTES */
PQCLEAN_NEWHOPE512CCA_CLEAN_cpapke_enc(ct, buf + 1, pk, k_coins_d + NEWHOPE_SYMBYTES); /* coins are in k_coins_d+NEWHOPE_SYMBYTES */
for (i = 0; i < NEWHOPE_SYMBYTES; i++) {
ct[i + NEWHOPE_CPAPKE_CIPHERTEXTBYTES] = k_coins_d[i + 2 * NEWHOPE_SYMBYTES]; /* copy Targhi-Unruh hash into ct */
@ -89,18 +91,19 @@ int PQCLEAN_NEWHOPE512CCA_CLEAN_crypto_kem_enc(unsigned char *ct, unsigned char
int PQCLEAN_NEWHOPE512CCA_CLEAN_crypto_kem_dec(unsigned char *ss, const unsigned char *ct, const unsigned char *sk) {
int i, fail;
unsigned char ct_cmp[NEWHOPE_CCAKEM_CIPHERTEXTBYTES];
unsigned char buf[2 * NEWHOPE_SYMBYTES];
unsigned char buf[2 * NEWHOPE_SYMBYTES + 1];
unsigned char k_coins_d[3 * NEWHOPE_SYMBYTES]; /* Will contain key, coins, qrom-hash */
const unsigned char *pk = sk + NEWHOPE_CPAPKE_SECRETKEYBYTES;
PQCLEAN_NEWHOPE512CCA_CLEAN_cpapke_dec(buf, ct, sk);
buf[0] = 0x08;
PQCLEAN_NEWHOPE512CCA_CLEAN_cpapke_dec(buf + 1, ct, sk);
for (i = 0; i < NEWHOPE_SYMBYTES; i++) { /* Use hash of pk stored in sk */
buf[NEWHOPE_SYMBYTES + i] = sk[NEWHOPE_CCAKEM_SECRETKEYBYTES - 2 * NEWHOPE_SYMBYTES + i];
buf[1 + NEWHOPE_SYMBYTES + i] = sk[NEWHOPE_CCAKEM_SECRETKEYBYTES - 2 * NEWHOPE_SYMBYTES + i];
}
shake256(k_coins_d, 3 * NEWHOPE_SYMBYTES, buf, 2 * NEWHOPE_SYMBYTES);
shake256(k_coins_d, 3 * NEWHOPE_SYMBYTES, buf, 2 * NEWHOPE_SYMBYTES + 1);
PQCLEAN_NEWHOPE512CCA_CLEAN_cpapke_enc(ct_cmp, buf, pk, k_coins_d + NEWHOPE_SYMBYTES); /* coins are in k_coins_d+NEWHOPE_SYMBYTES */
PQCLEAN_NEWHOPE512CCA_CLEAN_cpapke_enc(ct_cmp, buf + 1, pk, k_coins_d + NEWHOPE_SYMBYTES); /* coins are in k_coins_d+NEWHOPE_SYMBYTES */
for (i = 0; i < NEWHOPE_SYMBYTES; i++) {
ct_cmp[i + NEWHOPE_CPAPKE_CIPHERTEXTBYTES] = k_coins_d[i + 2 * NEWHOPE_SYMBYTES];

2
crypto_kem/newhope512cpa/META.yml
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@ -6,7 +6,7 @@ length-public-key: 928
length-secret-key: 896
length-ciphertext: 1088
length-shared-secret: 32
nistkat-sha256: 42444446b96f45c9b7221c4fde8afd5dfc0b3c2ff05b9a88ff12ea3949fbb76c
nistkat-sha256: 7df3eae4740483a61d13610f6bc2221f27e32c7849cf371e9770f986ce6fdb54
principal-submitters:
- Thomas Pöppelmann
auxiliary-submitters:

5
crypto_kem/newhope512cpa/clean/cpapke.c
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@ -101,8 +101,9 @@ void PQCLEAN_NEWHOPE512CPA_CLEAN_cpapke_keypair(unsigned char *pk,
unsigned char *publicseed = z;
unsigned char *noiseseed = z + NEWHOPE_SYMBYTES;
randombytes(z, NEWHOPE_SYMBYTES);
shake256(z, 2 * NEWHOPE_SYMBYTES, z, NEWHOPE_SYMBYTES);
z[0] = 0x01;
randombytes(z + 1, NEWHOPE_SYMBYTES);
shake256(z, 2 * NEWHOPE_SYMBYTES, z, NEWHOPE_SYMBYTES + 1);
gen_a(&ahat, publicseed);

5
crypto_kem/newhope512cpa/clean/kem.c
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@ -39,9 +39,10 @@ int PQCLEAN_NEWHOPE512CPA_CLEAN_crypto_kem_keypair(unsigned char *pk, unsigned c
int PQCLEAN_NEWHOPE512CPA_CLEAN_crypto_kem_enc(unsigned char *ct, unsigned char *ss, const unsigned char *pk) {
unsigned char buf[2 * NEWHOPE_SYMBYTES];
randombytes(buf, NEWHOPE_SYMBYTES);
buf[0] = 0x02;
randombytes(buf + 1, NEWHOPE_SYMBYTES);
shake256(buf, 2 * NEWHOPE_SYMBYTES, buf, NEWHOPE_SYMBYTES); /* Don't release system RNG output */
shake256(buf, 2 * NEWHOPE_SYMBYTES, buf, NEWHOPE_SYMBYTES + 1); /* Don't release system RNG output */
PQCLEAN_NEWHOPE512CPA_CLEAN_cpapke_enc(ct, buf, pk, buf + NEWHOPE_SYMBYTES); /* coins are in buf+NEWHOPE_SYMBYTES */