renamed crypto -> ext

1 files changed, 325 insertions, 0 deletions

diff --git a/ext/libressl/crypto/chacha/chacha-merged.c b/ext/libressl/crypto/chacha/chacha-merged.c
new file mode 100644
index 0000000..67508f2
--- /dev/null
+++ b/ext/libressl/crypto/chacha/chacha-merged.c
@@ -0,0 +1,325 @@
+/* $OpenBSD: chacha-merged.c,v 1.9 2019/01/22 00:59:21 dlg Exp $ */
+/*
+chacha-merged.c version 20080118
+D. J. Bernstein
+Public domain.
+*/
+
+#include <sys/types.h>
+
+#include <stdint.h>
+
+#define CHACHA_MINKEYLEN 	16
+#define CHACHA_NONCELEN		8
+#define CHACHA_CTRLEN		8
+#define CHACHA_STATELEN		(CHACHA_NONCELEN+CHACHA_CTRLEN)
+#define CHACHA_BLOCKLEN		64
+
+struct chacha_ctx {
+	u_int input[16];
+	uint8_t ks[CHACHA_BLOCKLEN];
+	uint8_t unused;
+};
+
+static inline void chacha_keysetup(struct chacha_ctx *x, const u_char *k,
+    u_int kbits)
+    __attribute__((__bounded__(__minbytes__, 2, CHACHA_MINKEYLEN)));
+static inline void chacha_ivsetup(struct chacha_ctx *x, const u_char *iv,
+    const u_char *ctr)
+    __attribute__((__bounded__(__minbytes__, 2, CHACHA_NONCELEN)))
+    __attribute__((__bounded__(__minbytes__, 3, CHACHA_CTRLEN)));
+static inline void chacha_encrypt_bytes(struct chacha_ctx *x, const u_char *m,
+    u_char *c, u_int bytes)
+    __attribute__((__bounded__(__buffer__, 2, 4)))
+    __attribute__((__bounded__(__buffer__, 3, 4)));
+
+typedef unsigned char u8;
+typedef unsigned int u32;
+
+typedef struct chacha_ctx chacha_ctx;
+
+#define U8C(v) (v##U)
+#define U32C(v) (v##U)
+
+#define U8V(v) ((u8)(v) & U8C(0xFF))
+#define U32V(v) ((u32)(v) & U32C(0xFFFFFFFF))
+
+#define ROTL32(v, n) \
+  (U32V((v) << (n)) | ((v) >> (32 - (n))))
+
+#define U8TO32_LITTLE(p) \
+  (((u32)((p)[0])) | \
+   ((u32)((p)[1]) <<  8) | \
+   ((u32)((p)[2]) << 16) | \
+   ((u32)((p)[3]) << 24))
+
+#define U32TO8_LITTLE(p, v) \
+  do { \
+    (p)[0] = U8V((v)); \
+    (p)[1] = U8V((v) >>  8); \
+    (p)[2] = U8V((v) >> 16); \
+    (p)[3] = U8V((v) >> 24); \
+  } while (0)
+
+#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);
+
+/* Initialise with "expand 32-byte k". */
+static const char sigma[16] = {
+	0x65, 0x78, 0x70, 0x61, 0x6e, 0x64, 0x20, 0x33,
+	0x32, 0x2d, 0x62, 0x79, 0x74, 0x65, 0x20, 0x6b,
+};
+
+/* Initialise with "expand 16-byte k". */
+static const char tau[16] = {
+	0x65, 0x78, 0x70, 0x61, 0x6e, 0x64, 0x20, 0x31,
+	0x36, 0x2d, 0x62, 0x79, 0x74, 0x65, 0x20, 0x6b,
+};
+
+static inline void
+chacha_keysetup(chacha_ctx *x, const u8 *k, u32 kbits)
+{
+	const char *constants;
+
+	x->input[4] = U8TO32_LITTLE(k + 0);
+	x->input[5] = U8TO32_LITTLE(k + 4);
+	x->input[6] = U8TO32_LITTLE(k + 8);
+	x->input[7] = U8TO32_LITTLE(k + 12);
+	if (kbits == 256) { /* recommended */
+		k += 16;
+		constants = sigma;
+	} else { /* kbits == 128 */
+		constants = tau;
+	}
+	x->input[8] = U8TO32_LITTLE(k + 0);
+	x->input[9] = U8TO32_LITTLE(k + 4);
+	x->input[10] = U8TO32_LITTLE(k + 8);
+	x->input[11] = U8TO32_LITTLE(k + 12);
+	x->input[0] = U8TO32_LITTLE(constants + 0);
+	x->input[1] = U8TO32_LITTLE(constants + 4);
+	x->input[2] = U8TO32_LITTLE(constants + 8);
+	x->input[3] = U8TO32_LITTLE(constants + 12);
+}
+
+static inline void
+chacha_ivsetup(chacha_ctx *x, const u8 *iv, const u8 *counter)
+{
+	x->input[12] = counter == NULL ? 0 : U8TO32_LITTLE(counter + 0);
+	x->input[13] = counter == NULL ? 0 : U8TO32_LITTLE(counter + 4);
+	x->input[14] = U8TO32_LITTLE(iv + 0);
+	x->input[15] = U8TO32_LITTLE(iv + 4);
+}
+
+static inline void
+chacha_encrypt_bytes(chacha_ctx *x, const u8 *m, u8 *c, u32 bytes)
+{
+	u32 x0, x1, x2, x3, x4, x5, x6, x7;
+	u32 x8, x9, x10, x11, x12, x13, x14, x15;
+	u32 j0, j1, j2, j3, j4, j5, j6, j7;
+	u32 j8, j9, j10, j11, j12, j13, j14, j15;
+	u8 *ctarget = NULL;
+	u8 tmp[64];
+	u_int i;
+
+	if (!bytes)
+		return;
+
+	j0 = x->input[0];
+	j1 = x->input[1];
+	j2 = x->input[2];
+	j3 = x->input[3];
+	j4 = x->input[4];
+	j5 = x->input[5];
+	j6 = x->input[6];
+	j7 = x->input[7];
+	j8 = x->input[8];
+	j9 = x->input[9];
+	j10 = x->input[10];
+	j11 = x->input[11];
+	j12 = x->input[12];
+	j13 = x->input[13];
+	j14 = x->input[14];
+	j15 = x->input[15];
+
+	for (;;) {
+		if (bytes < 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);
+
+		if (bytes < 64) {
+			U32TO8_LITTLE(x->ks + 0, x0);
+			U32TO8_LITTLE(x->ks + 4, x1);
+			U32TO8_LITTLE(x->ks + 8, x2);
+			U32TO8_LITTLE(x->ks + 12, x3);
+			U32TO8_LITTLE(x->ks + 16, x4);
+			U32TO8_LITTLE(x->ks + 20, x5);
+			U32TO8_LITTLE(x->ks + 24, x6);
+			U32TO8_LITTLE(x->ks + 28, x7);
+			U32TO8_LITTLE(x->ks + 32, x8);
+			U32TO8_LITTLE(x->ks + 36, x9);
+			U32TO8_LITTLE(x->ks + 40, x10);
+			U32TO8_LITTLE(x->ks + 44, x11);
+			U32TO8_LITTLE(x->ks + 48, x12);
+			U32TO8_LITTLE(x->ks + 52, x13);
+			U32TO8_LITTLE(x->ks + 56, x14);
+			U32TO8_LITTLE(x->ks + 60, x15);
+		}
+
+		x0 = XOR(x0, U8TO32_LITTLE(m + 0));
+		x1 = XOR(x1, U8TO32_LITTLE(m + 4));
+		x2 = XOR(x2, U8TO32_LITTLE(m + 8));
+		x3 = XOR(x3, U8TO32_LITTLE(m + 12));
+		x4 = XOR(x4, U8TO32_LITTLE(m + 16));
+		x5 = XOR(x5, U8TO32_LITTLE(m + 20));
+		x6 = XOR(x6, U8TO32_LITTLE(m + 24));
+		x7 = XOR(x7, U8TO32_LITTLE(m + 28));
+		x8 = XOR(x8, U8TO32_LITTLE(m + 32));
+		x9 = XOR(x9, U8TO32_LITTLE(m + 36));
+		x10 = XOR(x10, U8TO32_LITTLE(m + 40));
+		x11 = XOR(x11, U8TO32_LITTLE(m + 44));
+		x12 = XOR(x12, U8TO32_LITTLE(m + 48));
+		x13 = XOR(x13, U8TO32_LITTLE(m + 52));
+		x14 = XOR(x14, U8TO32_LITTLE(m + 56));
+		x15 = XOR(x15, U8TO32_LITTLE(m + 60));
+
+		j12 = PLUSONE(j12);
+		if (!j12) {
+			j13 = PLUSONE(j13);
+			/*
+			 * Stopping at 2^70 bytes per nonce is the user's
+			 * responsibility.
+			 */
+		}
+
+		U32TO8_LITTLE(c + 0, x0);
+		U32TO8_LITTLE(c + 4, x1);
+		U32TO8_LITTLE(c + 8, x2);
+		U32TO8_LITTLE(c + 12, x3);
+		U32TO8_LITTLE(c + 16, x4);
+		U32TO8_LITTLE(c + 20, x5);
+		U32TO8_LITTLE(c + 24, x6);
+		U32TO8_LITTLE(c + 28, x7);
+		U32TO8_LITTLE(c + 32, x8);
+		U32TO8_LITTLE(c + 36, x9);
+		U32TO8_LITTLE(c + 40, x10);
+		U32TO8_LITTLE(c + 44, x11);
+		U32TO8_LITTLE(c + 48, x12);
+		U32TO8_LITTLE(c + 52, x13);
+		U32TO8_LITTLE(c + 56, x14);
+		U32TO8_LITTLE(c + 60, x15);
+
+		if (bytes <= 64) {
+			if (bytes < 64) {
+				for (i = 0; i < bytes; ++i)
+					ctarget[i] = c[i];
+			}
+			x->input[12] = j12;
+			x->input[13] = j13;
+			x->unused = 64 - bytes;
+			return;
+		}
+		bytes -= 64;
+		c += 64;
+		m += 64;
+	}
+}
+
+void
+CRYPTO_hchacha_20(unsigned char subkey[32], const unsigned char key[32],
+    const unsigned char nonce[16])
+{
+	uint32_t x[16];
+	int i;
+
+	x[0] = U8TO32_LITTLE(sigma + 0);
+	x[1] = U8TO32_LITTLE(sigma + 4);
+	x[2] = U8TO32_LITTLE(sigma + 8);
+	x[3] = U8TO32_LITTLE(sigma + 12);
+	x[4] = U8TO32_LITTLE(key + 0);
+	x[5] = U8TO32_LITTLE(key + 4);
+	x[6] = U8TO32_LITTLE(key + 8);
+	x[7] = U8TO32_LITTLE(key + 12);
+	x[8] = U8TO32_LITTLE(key + 16);
+	x[9] = U8TO32_LITTLE(key + 20);
+	x[10] = U8TO32_LITTLE(key + 24);
+	x[11] = U8TO32_LITTLE(key + 28);
+	x[12] = U8TO32_LITTLE(nonce + 0);
+	x[13] = U8TO32_LITTLE(nonce + 4);
+	x[14] = U8TO32_LITTLE(nonce + 8);
+	x[15] = U8TO32_LITTLE(nonce + 12);
+
+	for (i = 20; i > 0; i -= 2) {
+		QUARTERROUND(x[0], x[4], x[8], x[12])
+		QUARTERROUND(x[1], x[5], x[9], x[13])
+		QUARTERROUND(x[2], x[6], x[10], x[14])
+		QUARTERROUND(x[3], x[7], x[11], x[15])
+		QUARTERROUND(x[0], x[5], x[10], x[15])
+		QUARTERROUND(x[1], x[6], x[11], x[12])
+		QUARTERROUND(x[2], x[7], x[8], x[13])
+		QUARTERROUND(x[3], x[4], x[9], x[14])
+	}
+
+	U32TO8_LITTLE(subkey + 0, x[0]);
+	U32TO8_LITTLE(subkey + 4, x[1]);
+	U32TO8_LITTLE(subkey + 8, x[2]);
+	U32TO8_LITTLE(subkey + 12, x[3]);
+
+	U32TO8_LITTLE(subkey + 16, x[12]);
+	U32TO8_LITTLE(subkey + 20, x[13]);
+	U32TO8_LITTLE(subkey + 24, x[14]);
+	U32TO8_LITTLE(subkey + 28, x[15]);
+}