diff options
Diffstat (limited to 'src/Mayaqua/Encrypt.c')
| -rw-r--r-- | src/Mayaqua/Encrypt.c | 1063 |
1 files changed, 1058 insertions, 5 deletions
diff --git a/src/Mayaqua/Encrypt.c b/src/Mayaqua/Encrypt.c index f56fc86f..d93ef7d5 100644 --- a/src/Mayaqua/Encrypt.c +++ b/src/Mayaqua/Encrypt.c @@ -142,6 +142,8 @@ LOCK *openssl_lock = NULL;
+int ssl_clientcert_index = 0;
+
LOCK **ssl_lock_obj = NULL;
UINT ssl_lock_num;
static bool openssl_inited = false;
@@ -2456,7 +2458,6 @@ bool RsaVerifyEx(void *data, UINT data_size, void *sign, K *k, UINT bits) UCHAR hash_data[SIGN_HASH_SIZE];
UCHAR *decrypt_data;
RSA *rsa;
- UINT rsa_size;
// Validate arguments
if (data == NULL || sign == NULL || k == NULL || k->private_key != false)
{
@@ -2473,16 +2474,15 @@ bool RsaVerifyEx(void *data, UINT data_size, void *sign, K *k, UINT bits) return false;
}
+ decrypt_data = ZeroMalloc(RSA_size(rsa));
+
// Hash the data
if (HashForSign(hash_data, sizeof(hash_data), data, data_size) == false)
{
+ Free(decrypt_data);
return false;
}
- rsa_size = RSA_size(rsa);
- rsa_size = MAX(rsa_size, 1024); // For just in case
- decrypt_data = ZeroMalloc(rsa_size);
-
// Decode the signature
if (RSA_public_decrypt(bits / 8, sign, decrypt_data, rsa, RSA_PKCS1_PADDING) <= 0)
{
@@ -4137,6 +4137,8 @@ void InitCryptLibrary() ERR_load_crypto_strings();
SSL_load_error_strings();
+ ssl_clientcert_index = SSL_get_ex_new_index(0, "struct SslClientCertInfo *", NULL, NULL, NULL);
+
#ifdef OS_UNIX
{
char *name1 = "/dev/random";
@@ -5171,5 +5173,1056 @@ static unsigned char *Internal_SHA0(const unsigned char *d, size_t n, unsigned c }
+int GetSslClientCertIndex()
+{
+ return ssl_clientcert_index;
+}
+
+
+
+//// RFC 8439: ChaCha20 and Poly1305 for IETF Protocols
+//// Implementation from libsodium: https://github.com/jedisct1/libsodium
+////
+//// SoftEther VPN must support OpenSSL versions between 1.0.2 to the latest version.
+//// Since we are unable to use ChaCha20 and Poly1305 on OpenSSL 1.0.x,
+//// we copied the C implementation from libsodium.
+//// Please note that the C implementation for ChaCha20 and Poly1305 is slow than
+//// the OpenSSL 1.0.0 or later's implementation for ChaCha20 and Poly1305.
+////
+//// If OpenSSL 1.1.0 or later is linked, we use OpenSSL's ChaCha20 and Poly1305 implementation.
+
+/*
+ * ISC License
+ *
+ * Copyright (c) 2013-2018
+ * Frank Denis <j at pureftpd dot org>
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+#ifdef OS_WIN32
+#define inline __inline
+#endif
+
+#define poly1305_block_size 16
+
+#define U32C(v) (v##U)
+#define U32V(v) ((UINT)(v) &U32C(0xFFFFFFFF))
+#define ROTATE(v, c) (ROTL32(v, c))
+#define XOR(v, w) ((v) ^ (w))
+#define PLUS(v, w) (U32V((v) + (w)))
+#define PLUSONE(v) (PLUS((v), 1))
+
+#define QUARTERROUND(a, b, c, d) \
+ a = PLUS(a, b); \
+ d = ROTATE(XOR(d, a), 16); \
+ c = PLUS(c, d); \
+ b = ROTATE(XOR(b, c), 12); \
+ a = PLUS(a, b); \
+ d = ROTATE(XOR(d, a), 8); \
+ c = PLUS(c, d); \
+ b = ROTATE(XOR(b, c), 7);
+
+#define ROTL32(X, B) rotl32((X), (B))
+static inline UINT
+rotl32(const UINT x, const int b)
+{
+ return (x << b) | (x >> (32 - b));
+}
+
+
+#define LOAD32_LE(SRC) load32_le(SRC)
+
+static inline UINT
+load32_le(const UCHAR src[4])
+{
+ if (IsBigEndian() == false)
+ {
+ UINT w;
+ memcpy(&w, src, sizeof w);
+ return w;
+ }
+ else
+ {
+ UINT w = (UINT) src[0];
+ w |= (UINT) src[1] << 8;
+ w |= (UINT) src[2] << 16;
+ w |= (UINT) src[3] << 24;
+ return w;
+ }
+}
+
+#define STORE32_LE(DST, W) store32_le((DST), (W))
+static inline void
+store32_le(UCHAR dst[4], UINT w)
+{
+ if (IsBigEndian() == false)
+ {
+ memcpy(dst, &w, sizeof w);
+ }
+ else
+ {
+ dst[0] = (UCHAR) w; w >>= 8;
+ dst[1] = (UCHAR) w; w >>= 8;
+ dst[2] = (UCHAR) w; w >>= 8;
+ dst[3] = (UCHAR) w;
+ }
+}
+
+
+#define LOAD64_LE(SRC) load64_le(SRC)
+static inline UINT64
+load64_le(const UCHAR src[8])
+{
+ if (IsBigEndian() == false)
+ {
+ UINT64 w;
+ memcpy(&w, src, sizeof w);
+ return w;
+ }
+ else
+ {
+ UINT64 w = (UINT64) src[0];
+ w |= (UINT64) src[1] << 8;
+ w |= (UINT64) src[2] << 16;
+ w |= (UINT64) src[3] << 24;
+ w |= (UINT64) src[4] << 32;
+ w |= (UINT64) src[5] << 40;
+ w |= (UINT64) src[6] << 48;
+ w |= (UINT64) src[7] << 56;
+ return w;
+ }
+}
+
+#define STORE64_LE(DST, W) store64_le((DST), (W))
+static inline void
+store64_le(UCHAR dst[8], UINT64 w)
+{
+ if (IsBigEndian() == false)
+ {
+ memcpy(dst, &w, sizeof w);
+ }
+ else
+ {
+ dst[0] = (UCHAR) w; w >>= 8;
+ dst[1] = (UCHAR) w; w >>= 8;
+ dst[2] = (UCHAR) w; w >>= 8;
+ dst[3] = (UCHAR) w; w >>= 8;
+ dst[4] = (UCHAR) w; w >>= 8;
+ dst[5] = (UCHAR) w; w >>= 8;
+ dst[6] = (UCHAR) w; w >>= 8;
+ dst[7] = (UCHAR) w;
+ }
+}
+
+
+
+typedef struct chacha_ctx {
+ UINT input[16];
+} chacha_ctx;
+
+
+
+
+#define crypto_stream_chacha20_ietf_MESSAGEBYTES_MAX \
+ (64ULL * (1ULL << 32))
+
+typedef struct crypto_onetimeauth_poly1305_state {
+ unsigned char opaque[256];
+} crypto_onetimeauth_poly1305_state;
+
+/* 17 + sizeof(unsigned long long) + 14*sizeof(unsigned long) */
+typedef struct poly1305_state_internal_t {
+ unsigned long r[5];
+ unsigned long h[5];
+ unsigned long pad[4];
+ unsigned long long leftover;
+ unsigned char buffer[poly1305_block_size];
+ unsigned char final;
+} poly1305_state_internal_t;
+static void
+chacha_keysetup(chacha_ctx *ctx, const UCHAR *k)
+{
+ ctx->input[0] = U32C(0x61707865);
+ ctx->input[1] = U32C(0x3320646e);
+ ctx->input[2] = U32C(0x79622d32);
+ ctx->input[3] = U32C(0x6b206574);
+ ctx->input[4] = LOAD32_LE(k + 0);
+ ctx->input[5] = LOAD32_LE(k + 4);
+ ctx->input[6] = LOAD32_LE(k + 8);
+ ctx->input[7] = LOAD32_LE(k + 12);
+ ctx->input[8] = LOAD32_LE(k + 16);
+ ctx->input[9] = LOAD32_LE(k + 20);
+ ctx->input[10] = LOAD32_LE(k + 24);
+ ctx->input[11] = LOAD32_LE(k + 28);
+}
+
+static void
+chacha_ietf_ivsetup(chacha_ctx *ctx, const UCHAR *iv, const UCHAR *counter)
+{
+ ctx->input[12] = counter == NULL ? 0 : LOAD32_LE(counter);
+ ctx->input[13] = LOAD32_LE(iv + 0);
+ ctx->input[14] = LOAD32_LE(iv + 4);
+ ctx->input[15] = LOAD32_LE(iv + 8);
+}
+
+static void
+chacha20_encrypt_bytes(chacha_ctx *ctx, const UCHAR *m, UCHAR *c,
+ unsigned long long bytes)
+{
+ UINT x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14,
+ x15;
+ UINT j0, j1, j2, j3, j4, j5, j6, j7, j8, j9, j10, j11, j12, j13, j14,
+ j15;
+ UCHAR *ctarget = NULL;
+ UCHAR tmp[64];
+ unsigned int i;
+
+ if (!bytes) {
+ return; /* LCOV_EXCL_LINE */
+ }
+ j0 = ctx->input[0];
+ j1 = ctx->input[1];
+ j2 = ctx->input[2];
+ j3 = ctx->input[3];
+ j4 = ctx->input[4];
+ j5 = ctx->input[5];
+ j6 = ctx->input[6];
+ j7 = ctx->input[7];
+ j8 = ctx->input[8];
+ j9 = ctx->input[9];
+ j10 = ctx->input[10];
+ j11 = ctx->input[11];
+ j12 = ctx->input[12];
+ j13 = ctx->input[13];
+ j14 = ctx->input[14];
+ j15 = ctx->input[15];
+
+ for (;;) {
+ if (bytes < 64) {
+ memset(tmp, 0, 64);
+ for (i = 0; i < bytes; ++i) {
+ tmp[i] = m[i];
+ }
+ m = tmp;
+ ctarget = c;
+ c = tmp;
+ }
+ x0 = j0;
+ x1 = j1;
+ x2 = j2;
+ x3 = j3;
+ x4 = j4;
+ x5 = j5;
+ x6 = j6;
+ x7 = j7;
+ x8 = j8;
+ x9 = j9;
+ x10 = j10;
+ x11 = j11;
+ x12 = j12;
+ x13 = j13;
+ x14 = j14;
+ x15 = j15;
+ for (i = 20; i > 0; i -= 2) {
+ QUARTERROUND(x0, x4, x8, x12)
+ QUARTERROUND(x1, x5, x9, x13)
+ QUARTERROUND(x2, x6, x10, x14)
+ QUARTERROUND(x3, x7, x11, x15)
+ QUARTERROUND(x0, x5, x10, x15)
+ QUARTERROUND(x1, x6, x11, x12)
+ QUARTERROUND(x2, x7, x8, x13)
+ QUARTERROUND(x3, x4, x9, x14)
+ }
+ x0 = PLUS(x0, j0);
+ x1 = PLUS(x1, j1);
+ x2 = PLUS(x2, j2);
+ x3 = PLUS(x3, j3);
+ x4 = PLUS(x4, j4);
+ x5 = PLUS(x5, j5);
+ x6 = PLUS(x6, j6);
+ x7 = PLUS(x7, j7);
+ x8 = PLUS(x8, j8);
+ x9 = PLUS(x9, j9);
+ x10 = PLUS(x10, j10);
+ x11 = PLUS(x11, j11);
+ x12 = PLUS(x12, j12);
+ x13 = PLUS(x13, j13);
+ x14 = PLUS(x14, j14);
+ x15 = PLUS(x15, j15);
+
+ x0 = XOR(x0, LOAD32_LE(m + 0));
+ x1 = XOR(x1, LOAD32_LE(m + 4));
+ x2 = XOR(x2, LOAD32_LE(m + 8));
+ x3 = XOR(x3, LOAD32_LE(m + 12));
+ x4 = XOR(x4, LOAD32_LE(m + 16));
+ x5 = XOR(x5, LOAD32_LE(m + 20));
+ x6 = XOR(x6, LOAD32_LE(m + 24));
+ x7 = XOR(x7, LOAD32_LE(m + 28));
+ x8 = XOR(x8, LOAD32_LE(m + 32));
+ x9 = XOR(x9, LOAD32_LE(m + 36));
+ x10 = XOR(x10, LOAD32_LE(m + 40));
+ x11 = XOR(x11, LOAD32_LE(m + 44));
+ x12 = XOR(x12, LOAD32_LE(m + 48));
+ x13 = XOR(x13, LOAD32_LE(m + 52));
+ x14 = XOR(x14, LOAD32_LE(m + 56));
+ x15 = XOR(x15, LOAD32_LE(m + 60));
+
+ j12 = PLUSONE(j12);
+ /* LCOV_EXCL_START */
+ if (!j12) {
+ j13 = PLUSONE(j13);
+ }
+ /* LCOV_EXCL_STOP */
+
+ STORE32_LE(c + 0, x0);
+ STORE32_LE(c + 4, x1);
+ STORE32_LE(c + 8, x2);
+ STORE32_LE(c + 12, x3);
+ STORE32_LE(c + 16, x4);
+ STORE32_LE(c + 20, x5);
+ STORE32_LE(c + 24, x6);
+ STORE32_LE(c + 28, x7);
+ STORE32_LE(c + 32, x8);
+ STORE32_LE(c + 36, x9);
+ STORE32_LE(c + 40, x10);
+ STORE32_LE(c + 44, x11);
+ STORE32_LE(c + 48, x12);
+ STORE32_LE(c + 52, x13);
+ STORE32_LE(c + 56, x14);
+ STORE32_LE(c + 60, x15);
+
+ if (bytes <= 64) {
+ if (bytes < 64) {
+ for (i = 0; i < (unsigned int) bytes; ++i) {
+ ctarget[i] = c[i]; /* ctarget cannot be NULL */
+ }
+ }
+ ctx->input[12] = j12;
+ ctx->input[13] = j13;
+
+ return;
+ }
+ bytes -= 64;
+ c += 64;
+ m += 64;
+ }
+}
+
+static int
+stream_ietf_ext_ref(unsigned char *c, unsigned long long clen,
+ const unsigned char *n, const unsigned char *k)
+{
+ struct chacha_ctx ctx;
+
+ if (!clen) {
+ return 0;
+ }
+ chacha_keysetup(&ctx, k);
+ chacha_ietf_ivsetup(&ctx, n, NULL);
+ memset(c, 0, (UINT)clen);
+ chacha20_encrypt_bytes(&ctx, c, c, clen);
+ Zero(&ctx, sizeof ctx);
+
+ return 0;
+}
+
+int
+crypto_stream_chacha20_ietf(unsigned char *c, unsigned long long clen,
+ const unsigned char *n, const unsigned char *k)
+{
+ return stream_ietf_ext_ref(c, clen, n, k);
+}
+
+static void
+poly1305_init(poly1305_state_internal_t *st, const unsigned char key[32])
+{
+ /* r &= 0xffffffc0ffffffc0ffffffc0fffffff - wiped after finalization */
+ st->r[0] = (LOAD32_LE(&key[0])) & 0x3ffffff;
+ st->r[1] = (LOAD32_LE(&key[3]) >> 2) & 0x3ffff03;
+ st->r[2] = (LOAD32_LE(&key[6]) >> 4) & 0x3ffc0ff;
+ st->r[3] = (LOAD32_LE(&key[9]) >> 6) & 0x3f03fff;
+ st->r[4] = (LOAD32_LE(&key[12]) >> 8) & 0x00fffff;
+
+ /* h = 0 */
+ st->h[0] = 0;
+ st->h[1] = 0;
+ st->h[2] = 0;
+ st->h[3] = 0;
+ st->h[4] = 0;
+
+ /* save pad for later */
+ st->pad[0] = LOAD32_LE(&key[16]);
+ st->pad[1] = LOAD32_LE(&key[20]);
+ st->pad[2] = LOAD32_LE(&key[24]);
+ st->pad[3] = LOAD32_LE(&key[28]);
+
+ st->leftover = 0;
+ st->final = 0;
+}
+
+static void
+poly1305_blocks(poly1305_state_internal_t *st, const unsigned char *m,
+ unsigned long long bytes)
+{
+ const unsigned long hibit = (st->final) ? 0UL : (1UL << 24); /* 1 << 128 */
+ unsigned long r0, r1, r2, r3, r4;
+ unsigned long s1, s2, s3, s4;
+ unsigned long h0, h1, h2, h3, h4;
+ unsigned long long d0, d1, d2, d3, d4;
+ unsigned long c;
+
+ r0 = st->r[0];
+ r1 = st->r[1];
+ r2 = st->r[2];
+ r3 = st->r[3];
+ r4 = st->r[4];
+
+ s1 = r1 * 5;
+ s2 = r2 * 5;
+ s3 = r3 * 5;
+ s4 = r4 * 5;
+
+ h0 = st->h[0];
+ h1 = st->h[1];
+ h2 = st->h[2];
+ h3 = st->h[3];
+ h4 = st->h[4];
+
+ while (bytes >= poly1305_block_size) {
+ /* h += m[i] */
+ h0 += (LOAD32_LE(m + 0)) & 0x3ffffff;
+ h1 += (LOAD32_LE(m + 3) >> 2) & 0x3ffffff;
+ h2 += (LOAD32_LE(m + 6) >> 4) & 0x3ffffff;
+ h3 += (LOAD32_LE(m + 9) >> 6) & 0x3ffffff;
+ h4 += (LOAD32_LE(m + 12) >> 8) | hibit;
+
+ /* h *= r */
+ d0 = ((unsigned long long) h0 * r0) + ((unsigned long long) h1 * s4) +
+ ((unsigned long long) h2 * s3) + ((unsigned long long) h3 * s2) +
+ ((unsigned long long) h4 * s1);
+ d1 = ((unsigned long long) h0 * r1) + ((unsigned long long) h1 * r0) +
+ ((unsigned long long) h2 * s4) + ((unsigned long long) h3 * s3) +
+ ((unsigned long long) h4 * s2);
+ d2 = ((unsigned long long) h0 * r2) + ((unsigned long long) h1 * r1) +
+ ((unsigned long long) h2 * r0) + ((unsigned long long) h3 * s4) +
+ ((unsigned long long) h4 * s3);
+ d3 = ((unsigned long long) h0 * r3) + ((unsigned long long) h1 * r2) +
+ ((unsigned long long) h2 * r1) + ((unsigned long long) h3 * r0) +
+ ((unsigned long long) h4 * s4);
+ d4 = ((unsigned long long) h0 * r4) + ((unsigned long long) h1 * r3) +
+ ((unsigned long long) h2 * r2) + ((unsigned long long) h3 * r1) +
+ ((unsigned long long) h4 * r0);
+
+ /* (partial) h %= p */
+ c = (unsigned long) (d0 >> 26);
+ h0 = (unsigned long) d0 & 0x3ffffff;
+ d1 += c;
+ c = (unsigned long) (d1 >> 26);
+ h1 = (unsigned long) d1 & 0x3ffffff;
+ d2 += c;
+ c = (unsigned long) (d2 >> 26);
+ h2 = (unsigned long) d2 & 0x3ffffff;
+ d3 += c;
+ c = (unsigned long) (d3 >> 26);
+ h3 = (unsigned long) d3 & 0x3ffffff;
+ d4 += c;
+ c = (unsigned long) (d4 >> 26);
+ h4 = (unsigned long) d4 & 0x3ffffff;
+ h0 += c * 5;
+ c = (h0 >> 26);
+ h0 = h0 & 0x3ffffff;
+ h1 += c;
+
+ m += poly1305_block_size;
+ bytes -= poly1305_block_size;
+ }
+
+ st->h[0] = h0;
+ st->h[1] = h1;
+ st->h[2] = h2;
+ st->h[3] = h3;
+ st->h[4] = h4;
+}
+
+static void
+poly1305_update(poly1305_state_internal_t *st, const unsigned char *m,
+ unsigned long long bytes)
+{
+ unsigned long long i;
+
+ /* handle leftover */
+ if (st->leftover) {
+ unsigned long long want = (poly1305_block_size - st->leftover);
+
+ if (want > bytes) {
+ want = bytes;
+ }
+ for (i = 0; i < want; i++) {
+ st->buffer[st->leftover + i] = m[i];
+ }
+ bytes -= want;
+ m += want;
+ st->leftover += want;
+ if (st->leftover < poly1305_block_size) {
+ return;
+ }
+ poly1305_blocks(st, st->buffer, poly1305_block_size);
+ st->leftover = 0;
+ }
+
+ /* process full blocks */
+ if (bytes >= poly1305_block_size) {
+ unsigned long long want = (bytes & ~(poly1305_block_size - 1));
+
+ poly1305_blocks(st, m, want);
+ m += want;
+ bytes -= want;
+ }
+
+ /* store leftover */
+ if (bytes) {
+ for (i = 0; i < bytes; i++) {
+ st->buffer[st->leftover + i] = m[i];
+ }
+ st->leftover += bytes;
+ }
+}
+
+static int
+crypto_onetimeauth_poly1305_init(crypto_onetimeauth_poly1305_state *state,
+ const unsigned char *key)
+{
+ poly1305_init((poly1305_state_internal_t *) (void *) state, key);
+
+ return 0;
+}
+
+static int
+crypto_onetimeauth_poly1305_update(
+ crypto_onetimeauth_poly1305_state *state, const unsigned char *in,
+ unsigned long long inlen)
+{
+ poly1305_update((poly1305_state_internal_t *) (void *) state, in, inlen);
+
+ return 0;
+}
+
+static int
+stream_ietf_ext_ref_xor_ic(unsigned char *c, const unsigned char *m,
+ unsigned long long mlen, const unsigned char *n,
+ UINT ic, const unsigned char *k)
+{
+ struct chacha_ctx ctx;
+ UCHAR ic_bytes[4];
+
+ if (!mlen) {
+ return 0;
+ }
+ STORE32_LE(ic_bytes, ic);
+ chacha_keysetup(&ctx, k);
+ chacha_ietf_ivsetup(&ctx, n, ic_bytes);
+ chacha20_encrypt_bytes(&ctx, m, c, mlen);
+ Zero(&ctx, sizeof ctx);
+
+ return 0;
+}
+
+int
+crypto_stream_chacha20_ietf_xor_ic(unsigned char *c, const unsigned char *m,
+ unsigned long long mlen,
+ const unsigned char *n, UINT ic,
+ const unsigned char *k)
+{
+ return stream_ietf_ext_ref_xor_ic(c, m, mlen, n, ic, k);
+}
+
+
+static void
+poly1305_finish(poly1305_state_internal_t *st, unsigned char mac[16])
+{
+ unsigned long h0, h1, h2, h3, h4, c;
+ unsigned long g0, g1, g2, g3, g4;
+ unsigned long long f;
+ unsigned long mask;
+
+ /* process the remaining block */
+ if (st->leftover) {
+ unsigned long long i = st->leftover;
+
+ st->buffer[i++] = 1;
+ for (; i < poly1305_block_size; i++) {
+ st->buffer[i] = 0;
+ }
+ st->final = 1;
+ poly1305_blocks(st, st->buffer, poly1305_block_size);
+ }
+
+ /* fully carry h */
+ h0 = st->h[0];
+ h1 = st->h[1];
+ h2 = st->h[2];
+ h3 = st->h[3];
+ h4 = st->h[4];
+
+ c = h1 >> 26;
+ h1 = h1 & 0x3ffffff;
+ h2 += c;
+ c = h2 >> 26;
+ h2 = h2 & 0x3ffffff;
+ h3 += c;
+ c = h3 >> 26;
+ h3 = h3 & 0x3ffffff;
+ h4 += c;
+ c = h4 >> 26;
+ h4 = h4 & 0x3ffffff;
+ h0 += c * 5;
+ c = h0 >> 26;
+ h0 = h0 & 0x3ffffff;
+ h1 += c;
+
+ /* compute h + -p */
+ g0 = h0 + 5;
+ c = g0 >> 26;
+ g0 &= 0x3ffffff;
+ g1 = h1 + c;
+ c = g1 >> 26;
+ g1 &= 0x3ffffff;
+ g2 = h2 + c;
+ c = g2 >> 26;
+ g2 &= 0x3ffffff;
+ g3 = h3 + c;
+ c = g3 >> 26;
+ g3 &= 0x3ffffff;
+ g4 = h4 + c - (1UL << 26);
+
+ /* select h if h < p, or h + -p if h >= p */
+ mask = (g4 >> ((sizeof(unsigned long) * 8) - 1)) - 1;
+ g0 &= mask;
+ g1 &= mask;
+ g2 &= mask;
+ g3 &= mask;
+ g4 &= mask;
+ mask = ~mask;
+
+ h0 = (h0 & mask) | g0;
+ h1 = (h1 & mask) | g1;
+ h2 = (h2 & mask) | g2;
+ h3 = (h3 & mask) | g3;
+ h4 = (h4 & mask) | g4;
+
+ /* h = h % (2^128) */
+ h0 = ((h0) | (h1 << 26)) & 0xffffffff;
+ h1 = ((h1 >> 6) | (h2 << 20)) & 0xffffffff;
+ h2 = ((h2 >> 12) | (h3 << 14)) & 0xffffffff;
+ h3 = ((h3 >> 18) | (h4 << 8)) & 0xffffffff;
+
+ /* mac = (h + pad) % (2^128) */
+ f = (unsigned long long) h0 + st->pad[0];
+ h0 = (unsigned long) f;
+ f = (unsigned long long) h1 + st->pad[1] + (f >> 32);
+ h1 = (unsigned long) f;
+ f = (unsigned long long) h2 + st->pad[2] + (f >> 32);
+ h2 = (unsigned long) f;
+ f = (unsigned long long) h3 + st->pad[3] + (f >> 32);
+ h3 = (unsigned long) f;
+
+ STORE32_LE(mac + 0, (UINT) h0);
+ STORE32_LE(mac + 4, (UINT) h1);
+ STORE32_LE(mac + 8, (UINT) h2);
+ STORE32_LE(mac + 12, (UINT) h3);
+
+ /* zero out the state */
+ Zero((void *) st, sizeof *st);
+}
+
+static int
+crypto_onetimeauth_poly1305_final(
+ crypto_onetimeauth_poly1305_state *state, unsigned char *out)
+{
+ poly1305_finish((poly1305_state_internal_t *) (void *) state, out);
+
+ return 0;
+}
+
+static const unsigned char _pad0[16] = { 0 };
+
+int
+crypto_aead_chacha20poly1305_ietf_encrypt_detached(unsigned char *c,
+ unsigned char *mac,
+ unsigned long long *maclen_p,
+ const unsigned char *m,
+ unsigned long long mlen,
+ const unsigned char *ad,
+ unsigned long long adlen,
+ const unsigned char *nsec,
+ const unsigned char *npub,
+ const unsigned char *k)
+{
+ crypto_onetimeauth_poly1305_state state;
+ unsigned char block0[64U];
+ unsigned char slen[8U];
+
+ (void) nsec;
+ Zero(block0, sizeof block0);
+ crypto_stream_chacha20_ietf(block0, sizeof block0, npub, k);
+ crypto_onetimeauth_poly1305_init(&state, block0);
+
+ crypto_onetimeauth_poly1305_update(&state, ad, adlen);
+ crypto_onetimeauth_poly1305_update(&state, _pad0, (0x10 - adlen) & 0xf);
+
+ crypto_stream_chacha20_ietf_xor_ic(c, m, mlen, npub, 1U, k);
+
+ crypto_onetimeauth_poly1305_update(&state, c, mlen);
+ crypto_onetimeauth_poly1305_update(&state, _pad0, (0x10 - mlen) & 0xf);
+
+ STORE64_LE(slen, (UINT64) adlen);
+ crypto_onetimeauth_poly1305_update(&state, slen, sizeof slen);
+
+ STORE64_LE(slen, (UINT64) mlen);
+ crypto_onetimeauth_poly1305_update(&state, slen, sizeof slen);
+
+ crypto_onetimeauth_poly1305_final(&state, mac);
+ Zero(&state, sizeof state);
+
+ if (maclen_p != NULL) {
+ *maclen_p = 16;
+ }
+ return 0;
+}
+
+
+
+int
+crypto_aead_chacha20poly1305_ietf_decrypt_detached(unsigned char *m,
+ unsigned char *nsec,
+ const unsigned char *c,
+ unsigned long long clen,
+ const unsigned char *mac,
+ const unsigned char *ad,
+ unsigned long long adlen,
+ const unsigned char *npub,
+ const unsigned char *k)
+{
+ crypto_onetimeauth_poly1305_state state;
+ unsigned char block0[64U];
+ unsigned char slen[8U];
+ unsigned char computed_mac[16];
+ unsigned long long mlen;
+ int ret;
+
+ (void) nsec;
+ Zero(block0, sizeof block0);
+ crypto_stream_chacha20_ietf(block0, sizeof block0, npub, k);
+ crypto_onetimeauth_poly1305_init(&state, block0);
+
+ crypto_onetimeauth_poly1305_update(&state, ad, adlen);
+ crypto_onetimeauth_poly1305_update(&state, _pad0, (0x10 - adlen) & 0xf);
+
+ mlen = clen;
+ crypto_onetimeauth_poly1305_update(&state, c, mlen);
+ crypto_onetimeauth_poly1305_update(&state, _pad0, (0x10 - mlen) & 0xf);
+
+ STORE64_LE(slen, (UINT64) adlen);
+ crypto_onetimeauth_poly1305_update(&state, slen, sizeof slen);
+
+ STORE64_LE(slen, (UINT64) mlen);
+ crypto_onetimeauth_poly1305_update(&state, slen, sizeof slen);
+
+ crypto_onetimeauth_poly1305_final(&state, computed_mac);
+ Zero(&state, sizeof state);
+
+ ret = Cmp((void *)computed_mac, (void *)mac, 16);
+ Zero(computed_mac, sizeof computed_mac);
+ if (m == NULL) {
+ return ret;
+ }
+ if (ret != 0) {
+ memset(m, 0, (UINT)mlen);
+ return -1;
+ }
+ crypto_stream_chacha20_ietf_xor_ic(m, c, mlen, npub, 1U, k);
+
+ return 0;
+}
+
+int
+crypto_aead_chacha20poly1305_ietf_decrypt(unsigned char *m,
+ unsigned long long *mlen_p,
+ unsigned char *nsec,
+ const unsigned char *c,
+ unsigned long long clen,
+ const unsigned char *ad,
+ unsigned long long adlen,
+ const unsigned char *npub,
+ const unsigned char *k)
+{
+ unsigned long long mlen = 0ULL;
+ int ret = -1;
+
+ if (clen >= 16) {
+ ret = crypto_aead_chacha20poly1305_ietf_decrypt_detached
+ (m, nsec,
+ c, clen - 16,
+ c + clen - AEAD_CHACHA20_POLY1305_MAC_SIZE,
+ ad, adlen, npub, k);
+ }
+ if (mlen_p != NULL) {
+ if (ret == 0) {
+ mlen = clen - AEAD_CHACHA20_POLY1305_MAC_SIZE;
+ }
+ *mlen_p = mlen;
+ }
+ return ret;
+}
+
+
+int
+crypto_aead_chacha20poly1305_ietf_encrypt(unsigned char *c,
+ unsigned long long *clen_p,
+ const unsigned char *m,
+ unsigned long long mlen,
+ const unsigned char *ad,
+ unsigned long long adlen,
+ const unsigned char *nsec,
+ const unsigned char *npub,
+ const unsigned char *k)
+{
+ unsigned long long clen = 0ULL;
+ int ret;
+
+ ret = crypto_aead_chacha20poly1305_ietf_encrypt_detached(c,
+ c + mlen, NULL,
+ m, mlen,
+ ad, adlen,
+ nsec, npub, k);
+ if (clen_p != NULL) {
+ if (ret == 0) {
+ clen = mlen + AEAD_CHACHA20_POLY1305_MAC_SIZE;
+ }
+ *clen_p = clen;
+ }
+ return ret;
+}
+// RFC 8439: ChaCha20-Poly1305-IETF Encryption with AEAD
+void Aead_ChaCha20Poly1305_Ietf_Encrypt(void *dst, void *src, UINT src_size,
+ void *key, void *nonce, void *aad, UINT aad_size)
+{
+#ifdef USE_OPENSSL_AEAD_CHACHA20POLY1305
+ Aead_ChaCha20Poly1305_Ietf_Encrypt_OpenSSL(dst, src, src_size, key, nonce, aad, aad_size);
+#else // USE_OPENSSL_AEAD_CHACHA20POLY1305
+ Aead_ChaCha20Poly1305_Ietf_Encrypt_Embedded(dst, src, src_size, key, nonce, aad, aad_size);
+#endif // USE_OPENSSL_AEAD_CHACHA20POLY1305
+}
+void Aead_ChaCha20Poly1305_Ietf_Encrypt_OpenSSL(void *dst, void *src, UINT src_size,
+ void *key, void *nonce, void *aad, UINT aad_size)
+{
+#ifdef USE_OPENSSL_AEAD_CHACHA20POLY1305
+ EVP_CIPHER_CTX *ctx;
+ int outlen = 0;
+
+ if ((src_size != 0 && (dst == NULL || src == NULL)) ||
+ key == NULL || nonce == NULL ||
+ (aad_size != 0 && aad == NULL))
+ {
+ Zero(dst, src_size);
+ return;
+ }
+
+ ctx = EVP_CIPHER_CTX_new();
+
+ EVP_EncryptInit_ex(ctx, EVP_chacha20_poly1305(), 0, 0, 0);
+ EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, AEAD_CHACHA20_POLY1305_NONCE_SIZE, 0);
+ EVP_EncryptInit_ex(ctx, NULL, NULL, key, nonce);
+ EVP_EncryptUpdate(ctx, NULL, &outlen, aad, aad_size);
+ EVP_EncryptUpdate(ctx, dst, &outlen, src, src_size);
+ EVP_EncryptFinal_ex(ctx, dst, &outlen);
+ EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_GET_TAG, AEAD_CHACHA20_POLY1305_MAC_SIZE,
+ ((UCHAR *)dst) + src_size);
+
+ EVP_CIPHER_CTX_free(ctx);
+#endif // USE_OPENSSL_AEAD_CHACHA20POLY1305
+}
+void Aead_ChaCha20Poly1305_Ietf_Encrypt_Embedded(void *dst, void *src, UINT src_size,
+ void *key, void *nonce, void *aad, UINT aad_size)
+{
+ if ((src_size != 0 && (dst == NULL || src == NULL)) ||
+ key == NULL || nonce == NULL ||
+ (aad_size != 0 && aad == NULL))
+ {
+ Zero(dst, src_size);
+ return;
+ }
+ crypto_aead_chacha20poly1305_ietf_encrypt(dst, NULL, src, src_size, aad, aad_size,
+ NULL, nonce, key);
+}
+
+// RFC 8439: ChaCha20-Poly1305-IETF Decryption with AEAD
+bool Aead_ChaCha20Poly1305_Ietf_Decrypt(void *dst, void *src, UINT src_size, void *key, void *nonce, void *aad, UINT aad_size)
+{
+#ifdef USE_OPENSSL_AEAD_CHACHA20POLY1305
+ return Aead_ChaCha20Poly1305_Ietf_Decrypt_OpenSSL(dst, src, src_size, key,
+ nonce, aad, aad_size);
+#else // USE_OPENSSL_AEAD_CHACHA20POLY1305
+ return Aead_ChaCha20Poly1305_Ietf_Decrypt_Embedded(dst, src, src_size, key,
+ nonce, aad, aad_size);
+#endif // USE_OPENSSL_AEAD_CHACHA20POLY1305
+}
+bool Aead_ChaCha20Poly1305_Ietf_Decrypt_OpenSSL(void *dst, void *src, UINT src_size, void *key,
+ void *nonce, void *aad, UINT aad_size)
+{
+#ifdef USE_OPENSSL_AEAD_CHACHA20POLY1305
+ EVP_CIPHER_CTX *ctx;
+ int outlen = 0;
+ bool ret = false;
+
+ if ((src_size != 0 && (dst == NULL || src == NULL)) ||
+ key == NULL || nonce == NULL ||
+ (aad_size != 0 && aad == NULL) ||
+ (src_size < AEAD_CHACHA20_POLY1305_MAC_SIZE))
+ {
+ Zero(dst, src_size);
+ return false;
+ }
+
+ ctx = EVP_CIPHER_CTX_new();
+
+ EVP_DecryptInit_ex(ctx, EVP_chacha20_poly1305(), 0, 0, 0);
+ EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_IVLEN, AEAD_CHACHA20_POLY1305_NONCE_SIZE, 0);
+
+ if (EVP_DecryptInit_ex(ctx, NULL, NULL, key, nonce) == 1)
+ {
+ if (EVP_DecryptUpdate(ctx, NULL, &outlen, aad, aad_size) == 1)
+ {
+ if (EVP_DecryptUpdate(ctx, dst, &outlen, src, src_size - AEAD_CHACHA20_POLY1305_MAC_SIZE) == 1)
+ {
+ EVP_CIPHER_CTX_ctrl(ctx, EVP_CTRL_AEAD_SET_TAG, AEAD_CHACHA20_POLY1305_MAC_SIZE,
+ ((UCHAR *)src) + (src_size - AEAD_CHACHA20_POLY1305_MAC_SIZE));
+
+ if (EVP_DecryptFinal_ex(ctx, dst, &outlen))
+ {
+ ret = true;
+ }
+ }
+ }
+ }
+
+ EVP_CIPHER_CTX_free(ctx);
+
+ return ret;
+#else // USE_OPENSSL_AEAD_CHACHA20POLY1305
+ return false;
+#endif // USE_OPENSSL_AEAD_CHACHA20POLY1305
+}
+bool Aead_ChaCha20Poly1305_Ietf_Decrypt_Embedded(void *dst, void *src, UINT src_size, void *key,
+ void *nonce, void *aad, UINT aad_size)
+{
+ int ret;
+ if ((src_size != 0 && (dst == NULL || src == NULL)) ||
+ key == NULL || nonce == NULL ||
+ (aad_size != 0 && aad == NULL) ||
+ (src_size < AEAD_CHACHA20_POLY1305_MAC_SIZE))
+ {
+ Zero(dst, src_size);
+ return false;
+ }
+
+ ret = crypto_aead_chacha20poly1305_ietf_decrypt(
+ dst, NULL, NULL, src, src_size, aad, aad_size, nonce, key);
+
+ if (ret == -1)
+ {
+ return false;
+ }
+
+ return true;
+}
+
+bool Aead_ChaCha20Poly1305_Ietf_IsOpenSSL()
+{
+#ifdef USE_OPENSSL_AEAD_CHACHA20POLY1305
+ return true;
+#else // USE_OPENSSL_AEAD_CHACHA20POLY1305
+ return false;
+#endif // USE_OPENSSL_AEAD_CHACHA20POLY1305
+}
+
+// RFC 8439: ChaCha20-Poly1305-IETF AEAD Test
+void Aead_ChaCha20Poly1305_Ietf_Test()
+{
+ char *nonce_hex = "07 00 00 00 40 41 42 43 44 45 46 47";
+ char *plaintext_hex =
+ "4c 61 64 69 65 73 20 61 6e 64 20 47 65 6e 74 6c "
+ "65 6d 65 6e 20 6f 66 20 74 68 65 20 63 6c 61 73 "
+ "73 20 6f 66 20 27 39 39 3a 20 49 66 20 49 20 63 "
+ "6f 75 6c 64 20 6f 66 66 65 72 20 79 6f 75 20 6f "
+ "6e 6c 79 20 6f 6e 65 20 74 69 70 20 66 6f 72 20 "
+ "74 68 65 20 66 75 74 75 72 65 2c 20 73 75 6e 73 "
+ "63 72 65 65 6e 20 77 6f 75 6c 64 20 62 65 20 69 "
+ "74 2e";
+ char *aad_hex = "50 51 52 53 c0 c1 c2 c3 c4 c5 c6 c7";
+ char *key_hex =
+ "80 81 82 83 84 85 86 87 88 89 8a 8b 8c 8d 8e 8f "
+ "90 91 92 93 94 95 96 97 98 99 9a 9b 9c 9d 9e 9f";
+ BUF *nonce = StrToBin(nonce_hex);
+ BUF *plaintext = StrToBin(plaintext_hex);
+ BUF *aad = StrToBin(aad_hex);
+ BUF *key = StrToBin(key_hex);
+ UINT plaintext_size = plaintext->Size;
+ UCHAR *encrypted = Malloc(plaintext_size + AEAD_CHACHA20_POLY1305_MAC_SIZE);
+ UCHAR *decrypted = Malloc(plaintext_size);
+ char encrypted_hex[MAX_SIZE];
+ char mac_hex[MAX_SIZE];
+
+ Print("Aead_ChaCha20Poly1305_Ietf_Test()\n\n");
+
+ Aead_ChaCha20Poly1305_Ietf_Encrypt(encrypted, plaintext->Buf, plaintext_size,
+ key->Buf, nonce->Buf, aad->Buf, aad->Size);
+
+ BinToStrEx(encrypted_hex, sizeof(encrypted_hex), encrypted, plaintext_size);
+
+ BinToStrEx(mac_hex, sizeof(mac_hex), encrypted + plaintext_size, AEAD_CHACHA20_POLY1305_MAC_SIZE);
+
+ Print("Encrypted:\n%s\n\n", encrypted_hex);
+
+ Print("MAC:\n%s\n\n", mac_hex);
+
+ Print("Please check the results with https://tools.ietf.org/html/rfc8439#section-2.8.2 by your great eyes.\n\n");
+
+ if (Aead_ChaCha20Poly1305_Ietf_Decrypt(decrypted, encrypted, plaintext_size + AEAD_CHACHA20_POLY1305_MAC_SIZE,
+ key->Buf, nonce->Buf, aad->Buf, aad->Size) == false)
+ {
+ Print("Decrypt failed.\n");
+ }
+ else
+ {
+ Print("Decrypt OK.\n");
+ if (Cmp(plaintext->Buf, decrypted, plaintext_size) == 0)
+ {
+ Print("Same OK.\n");
+ }
+ else
+ {
+ Print("Different !!!\n");
+ }
+ }
+
+ FreeBuf(nonce);
+ FreeBuf(plaintext);
+ FreeBuf(aad);
+ FreeBuf(key);
+ Free(encrypted);
+ Free(decrypted);
+}
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