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Hakase
2020-01-21 10:59:59 +09:00
parent 0f7abb4eb6
commit f2d048b604
94 changed files with 989 additions and 10719 deletions
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crypto/ec/curve25519.c
+50 -23
View File
@@ -9,6 +9,7 @@
#include <string.h>
#include "ec_local.h"
#include <openssl/evp.h>
#include <openssl/sha.h>
#if defined(X25519_ASM) && (defined(__x86_64) || defined(__x86_64__) || \
@@ -5436,39 +5437,50 @@ int ED25519_sign(uint8_t *out_sig, const uint8_t *message, size_t message_len,
uint8_t nonce[SHA512_DIGEST_LENGTH];
ge_p3 R;
uint8_t hram[SHA512_DIGEST_LENGTH];
SHA512_CTX hash_ctx;
EVP_MD *sha512 = EVP_MD_fetch(NULL, SN_sha512, NULL);
EVP_MD_CTX *hash_ctx = EVP_MD_CTX_new();
unsigned int sz;
int res = 0;
SHA512_Init(&hash_ctx);
SHA512_Update(&hash_ctx, private_key, 32);
SHA512_Final(az, &hash_ctx);
if (sha512 == NULL || hash_ctx == NULL)
goto err;
if (!EVP_DigestInit_ex(hash_ctx, sha512, NULL)
|| !EVP_DigestUpdate(hash_ctx, private_key, 32)
|| !EVP_DigestFinal_ex(hash_ctx, az, &sz))
goto err;
az[0] &= 248;
az[31] &= 63;
az[31] |= 64;
SHA512_Init(&hash_ctx);
SHA512_Update(&hash_ctx, az + 32, 32);
SHA512_Update(&hash_ctx, message, message_len);
SHA512_Final(nonce, &hash_ctx);
if (!EVP_DigestInit_ex(hash_ctx, sha512, NULL)
|| !EVP_DigestUpdate(hash_ctx, az + 32, 32)
|| !EVP_DigestUpdate(hash_ctx, message, message_len)
|| !EVP_DigestFinal_ex(hash_ctx, nonce, &sz))
goto err;
x25519_sc_reduce(nonce);
ge_scalarmult_base(&R, nonce);
ge_p3_tobytes(out_sig, &R);
SHA512_Init(&hash_ctx);
SHA512_Update(&hash_ctx, out_sig, 32);
SHA512_Update(&hash_ctx, public_key, 32);
SHA512_Update(&hash_ctx, message, message_len);
SHA512_Final(hram, &hash_ctx);
if (!EVP_DigestInit_ex(hash_ctx, sha512, NULL)
|| !EVP_DigestUpdate(hash_ctx, out_sig, 32)
|| !EVP_DigestUpdate(hash_ctx, public_key, 32)
|| !EVP_DigestUpdate(hash_ctx, message, message_len)
|| !EVP_DigestFinal_ex(hash_ctx, hram, &sz))
goto err;
x25519_sc_reduce(hram);
sc_muladd(out_sig + 32, hram, az, nonce);
OPENSSL_cleanse(&hash_ctx, sizeof(hash_ctx));
res = 1;
err:
OPENSSL_cleanse(nonce, sizeof(nonce));
OPENSSL_cleanse(az, sizeof(az));
return 1;
EVP_MD_free(sha512);
EVP_MD_CTX_free(hash_ctx);
return res;
}
static const char allzeroes[15];
@@ -5479,7 +5491,10 @@ int ED25519_verify(const uint8_t *message, size_t message_len,
int i;
ge_p3 A;
const uint8_t *r, *s;
SHA512_CTX hash_ctx;
EVP_MD *sha512;
EVP_MD_CTX *hash_ctx = NULL;
unsigned int sz;
int res = 0;
ge_p2 R;
uint8_t rcheck[32];
uint8_t h[SHA512_DIGEST_LENGTH];
@@ -5526,11 +5541,19 @@ int ED25519_verify(const uint8_t *message, size_t message_len,
fe_neg(A.X, A.X);
fe_neg(A.T, A.T);
SHA512_Init(&hash_ctx);
SHA512_Update(&hash_ctx, r, 32);
SHA512_Update(&hash_ctx, public_key, 32);
SHA512_Update(&hash_ctx, message, message_len);
SHA512_Final(h, &hash_ctx);
sha512 = EVP_MD_fetch(NULL, SN_sha512, NULL);
if (sha512 == NULL)
return 0;
hash_ctx = EVP_MD_CTX_new();
if (hash_ctx == NULL)
goto err;
if (!EVP_DigestInit_ex(hash_ctx, sha512, NULL)
|| !EVP_DigestUpdate(hash_ctx, r, 32)
|| !EVP_DigestUpdate(hash_ctx, public_key, 32)
|| !EVP_DigestUpdate(hash_ctx, message, message_len)
|| !EVP_DigestFinal_ex(hash_ctx, h, &sz))
goto err;
x25519_sc_reduce(h);
@@ -5538,7 +5561,11 @@ int ED25519_verify(const uint8_t *message, size_t message_len,
ge_tobytes(rcheck, &R);
return CRYPTO_memcmp(rcheck, r, sizeof(rcheck)) == 0;
res = CRYPTO_memcmp(rcheck, r, sizeof(rcheck)) == 0;
err:
EVP_MD_free(sha512);
EVP_MD_CTX_free(hash_ctx);
return res;
}
void ED25519_public_from_private(uint8_t out_public_key[32],