[PATCH 3/7] crypto: add sha384 & sha512 support

[Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>]

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 crypto/Kconfig  |   6 +
 crypto/Makefile |   2 +
 crypto/sha4.c   | 340 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 348 insertions(+)
 create mode 100644 crypto/sha4.c

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 4bd8dcf..3b78a14 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -24,4 +24,10 @@ config SHA224
 config SHA256
 	bool "SHA256"
 
+config SHA384
+	bool "SHA384"
+
+config SHA512
+	bool "SHA512"
+
 endif
diff --git a/crypto/Makefile b/crypto/Makefile
index 7c5b035..5482b3e 100644
--- a/crypto/Makefile
+++ b/crypto/Makefile
@@ -5,3 +5,5 @@ obj-$(CONFIG_MD5)	+= md5.o
 obj-$(CONFIG_SHA1)	+= sha1.o
 obj-$(CONFIG_SHA224)	+= sha2.o
 obj-$(CONFIG_SHA256)	+= sha2.o
+obj-$(CONFIG_SHA384)	+= sha4.o
+obj-$(CONFIG_SHA512)	+= sha4.o
diff --git a/crypto/sha4.c b/crypto/sha4.c
new file mode 100644
index 0000000..c3dcf17
--- /dev/null
+++ b/crypto/sha4.c
@@ -0,0 +1,340 @@
+/*
+ *  FIPS-180-2 compliant SHA-384/512 implementation
+ *
+ *  Copyright (C) 2006-2007  Christophe Devine
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+/*
+ *  The SHA-512 Secure Hash Standard was published by NIST in 2002.
+ *
+ *  http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
+ */
+
+#include <common.h>
+#include <digest.h>
+#include <init.h>
+#include <linux/string.h>
+#include <asm/byteorder.h>
+
+#define SHA384_SUM_LEN	48
+#define SHA512_SUM_LEN	64
+
+typedef struct {
+	uint64_t total[2];
+	uint64_t state[8];
+	uint8_t buffer[128];
+	int is384;
+} sha4_context;
+
+/*
+ * 64-bit integer manipulation macros (big endian)
+ */
+
+#define GET_UINT64_BE(n,b,i) (n) = be64_to_cpu(((uint64_t*)(b))[i / 8])
+#define PUT_UINT64_BE(n,b,i) ((uint64_t*)(b))[i / 8] = cpu_to_be64(n)
+
+/*
+ * Round constants
+ */
+static const uint64_t K[80] = {
+	0x428A2F98D728AE22, 0x7137449123EF65CD,
+	0xB5C0FBCFEC4D3B2F, 0xE9B5DBA58189DBBC,
+	0x3956C25BF348B538, 0x59F111F1B605D019,
+	0x923F82A4AF194F9B, 0xAB1C5ED5DA6D8118,
+	0xD807AA98A3030242, 0x12835B0145706FBE,
+	0x243185BE4EE4B28C, 0x550C7DC3D5FFB4E2,
+	0x72BE5D74F27B896F, 0x80DEB1FE3B1696B1,
+	0x9BDC06A725C71235, 0xC19BF174CF692694,
+	0xE49B69C19EF14AD2, 0xEFBE4786384F25E3,
+	0x0FC19DC68B8CD5B5, 0x240CA1CC77AC9C65,
+	0x2DE92C6F592B0275, 0x4A7484AA6EA6E483,
+	0x5CB0A9DCBD41FBD4, 0x76F988DA831153B5,
+	0x983E5152EE66DFAB, 0xA831C66D2DB43210,
+	0xB00327C898FB213F, 0xBF597FC7BEEF0EE4,
+	0xC6E00BF33DA88FC2, 0xD5A79147930AA725,
+	0x06CA6351E003826F, 0x142929670A0E6E70,
+	0x27B70A8546D22FFC, 0x2E1B21385C26C926,
+	0x4D2C6DFC5AC42AED, 0x53380D139D95B3DF,
+	0x650A73548BAF63DE, 0x766A0ABB3C77B2A8,
+	0x81C2C92E47EDAEE6, 0x92722C851482353B,
+	0xA2BFE8A14CF10364, 0xA81A664BBC423001,
+	0xC24B8B70D0F89791, 0xC76C51A30654BE30,
+	0xD192E819D6EF5218, 0xD69906245565A910,
+	0xF40E35855771202A, 0x106AA07032BBD1B8,
+	0x19A4C116B8D2D0C8, 0x1E376C085141AB53,
+	0x2748774CDF8EEB99, 0x34B0BCB5E19B48A8,
+	0x391C0CB3C5C95A63, 0x4ED8AA4AE3418ACB,
+	0x5B9CCA4F7763E373, 0x682E6FF3D6B2B8A3,
+	0x748F82EE5DEFB2FC, 0x78A5636F43172F60,
+	0x84C87814A1F0AB72, 0x8CC702081A6439EC,
+	0x90BEFFFA23631E28, 0xA4506CEBDE82BDE9,
+	0xBEF9A3F7B2C67915, 0xC67178F2E372532B,
+	0xCA273ECEEA26619C, 0xD186B8C721C0C207,
+	0xEADA7DD6CDE0EB1E, 0xF57D4F7FEE6ED178,
+	0x06F067AA72176FBA, 0x0A637DC5A2C898A6,
+	0x113F9804BEF90DAE, 0x1B710B35131C471B,
+	0x28DB77F523047D84, 0x32CAAB7B40C72493,
+	0x3C9EBE0A15C9BEBC, 0x431D67C49C100D4C,
+	0x4CC5D4BECB3E42B6, 0x597F299CFC657E2A,
+	0x5FCB6FAB3AD6FAEC, 0x6C44198C4A475817
+};
+
+/*
+ * SHA-512 context setup
+ */
+static void sha4_starts(sha4_context * ctx, int is384)
+{
+	ctx->total[0] = 0;
+	ctx->total[1] = 0;
+
+	if (is384 == 0 && IS_ENABLED(CONFIG_SHA512)) {
+		/* SHA-512 */
+		ctx->state[0] = 0x6A09E667F3BCC908;
+		ctx->state[1] = 0xBB67AE8584CAA73B;
+		ctx->state[2] = 0x3C6EF372FE94F82B;
+		ctx->state[3] = 0xA54FF53A5F1D36F1;
+		ctx->state[4] = 0x510E527FADE682D1;
+		ctx->state[5] = 0x9B05688C2B3E6C1F;
+		ctx->state[6] = 0x1F83D9ABFB41BD6B;
+		ctx->state[7] = 0x5BE0CD19137E2179;
+	} else if (IS_ENABLED(CONFIG_SHA384)) {
+		/* SHA-384 */
+		ctx->state[0] = 0xCBBB9D5DC1059ED8;
+		ctx->state[1] = 0x629A292A367CD507;
+		ctx->state[2] = 0x9159015A3070DD17;
+		ctx->state[3] = 0x152FECD8F70E5939;
+		ctx->state[4] = 0x67332667FFC00B31;
+		ctx->state[5] = 0x8EB44A8768581511;
+		ctx->state[6] = 0xDB0C2E0D64F98FA7;
+		ctx->state[7] = 0x47B5481DBEFA4FA4;
+	}
+
+	ctx->is384 = is384;
+}
+
+static void sha4_process(sha4_context * ctx, unsigned char data[128])
+{
+	int i;
+	uint64_t temp1, temp2, W[80];
+	uint64_t A, B, C, D, E, F, G, H;
+
+#define  SHR(x,n) (x >> n)
+#define ROTR(x,n) (SHR(x,n) | (x << (64 - n)))
+
+#define S0(x) (ROTR(x, 1) ^ ROTR(x, 8) ^  SHR(x, 7))
+#define S1(x) (ROTR(x,19) ^ ROTR(x,61) ^  SHR(x, 6))
+
+#define S2(x) (ROTR(x,28) ^ ROTR(x,34) ^ ROTR(x,39))
+#define S3(x) (ROTR(x,14) ^ ROTR(x,18) ^ ROTR(x,41))
+
+#define F0(x,y,z) ((x & y) | (z & (x | y)))
+#define F1(x,y,z) (z ^ (x & (y ^ z)))
+
+#define P(a,b,c,d,e,f,g,h,x,K)                  \
+{                                               \
+    temp1 = h + S3(e) + F1(e,f,g) + K + x;      \
+    temp2 = S2(a) + F0(a,b,c);                  \
+    d += temp1; h = temp1 + temp2;              \
+}
+
+	for (i = 0; i < 16; i++) {
+		GET_UINT64_BE(W[i], data, i << 3);
+	}
+
+	for (; i < 80; i++) {
+		W[i] = S1(W[i - 2]) + W[i - 7] + S0(W[i - 15]) + W[i - 16];
+	}
+
+	A = ctx->state[0];
+	B = ctx->state[1];
+	C = ctx->state[2];
+	D = ctx->state[3];
+	E = ctx->state[4];
+	F = ctx->state[5];
+	G = ctx->state[6];
+	H = ctx->state[7];
+	i = 0;
+
+	do {
+		P(A, B, C, D, E, F, G, H, W[i], K[i]);
+		i++;
+		P(H, A, B, C, D, E, F, G, W[i], K[i]);
+		i++;
+		P(G, H, A, B, C, D, E, F, W[i], K[i]);
+		i++;
+		P(F, G, H, A, B, C, D, E, W[i], K[i]);
+		i++;
+		P(E, F, G, H, A, B, C, D, W[i], K[i]);
+		i++;
+		P(D, E, F, G, H, A, B, C, W[i], K[i]);
+		i++;
+		P(C, D, E, F, G, H, A, B, W[i], K[i]);
+		i++;
+		P(B, C, D, E, F, G, H, A, W[i], K[i]);
+		i++;
+	} while (i < 80);
+
+	ctx->state[0] += A;
+	ctx->state[1] += B;
+	ctx->state[2] += C;
+	ctx->state[3] += D;
+	ctx->state[4] += E;
+	ctx->state[5] += F;
+	ctx->state[6] += G;
+	ctx->state[7] += H;
+}
+
+/*
+ * SHA-512 process buffer
+ */
+static void sha4_update(sha4_context * ctx, unsigned char *input, int ilen)
+{
+	int fill;
+	uint64_t left;
+
+	if (ilen <= 0)
+		return;
+
+	left = ctx->total[0] & 0x7F;
+	fill = (int)(128 - left);
+
+	ctx->total[0] += ilen;
+
+	if (ctx->total[0] < (uint64_t)ilen)
+		ctx->total[1]++;
+
+	if (left && ilen >= fill) {
+		memcpy((void *)(ctx->buffer + left), (void *)input, fill);
+		sha4_process(ctx, ctx->buffer);
+		input += fill;
+		ilen -= fill;
+		left = 0;
+	}
+
+	while (ilen >= 128) {
+		sha4_process(ctx, input);
+		input += 128;
+		ilen -= 128;
+	}
+
+	if (ilen > 0)
+		memcpy((void *)(ctx->buffer + left), (void *)input, ilen);
+}
+
+static const unsigned char sha4_padding[128] = {
+	0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+	0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
+};
+
+/*
+ * SHA-512 final digest
+ */
+static void sha4_finish(sha4_context * ctx, unsigned char output[64])
+{
+	int last, padn;
+	uint64_t high, low;
+	unsigned char msglen[16];
+
+	high = (ctx->total[0] >> 61)
+	    | (ctx->total[1] << 3);
+	low = (ctx->total[0] << 3);
+
+	PUT_UINT64_BE(high, msglen, 0);
+	PUT_UINT64_BE(low, msglen, 8);
+
+	last = (int)(ctx->total[0] & 0x7F);
+	padn = (last < 112) ? (112 - last) : (240 - last);
+
+	sha4_update(ctx, (unsigned char *)sha4_padding, padn);
+	sha4_update(ctx, msglen, 16);
+
+	PUT_UINT64_BE(ctx->state[0], output, 0);
+	PUT_UINT64_BE(ctx->state[1], output, 8);
+	PUT_UINT64_BE(ctx->state[2], output, 16);
+	PUT_UINT64_BE(ctx->state[3], output, 24);
+	PUT_UINT64_BE(ctx->state[4], output, 32);
+	PUT_UINT64_BE(ctx->state[5], output, 40);
+
+	if (ctx->is384 == 0) {
+		PUT_UINT64_BE(ctx->state[6], output, 48);
+		PUT_UINT64_BE(ctx->state[7], output, 56);
+	}
+}
+
+static int digest_sha4_update(struct digest *d, const void *data,
+				unsigned long len)
+{
+	sha4_update(d->ctx, (uint8_t *)data, len);
+
+	return 0;
+}
+
+static int digest_sha4_final(struct digest *d, unsigned char *md)
+{
+	sha4_finish(d->ctx, md);
+
+	return 0;
+}
+
+static int digest_sha384_init(struct digest *d)
+{
+	sha4_starts(d->ctx, 1);
+
+	return 0;
+}
+
+static struct digest_algo m384 = {
+	.name = "sha384",
+	.init = digest_sha384_init,
+	.update = digest_sha4_update,
+	.final = digest_sha4_final,
+	.length = SHA384_SUM_LEN,
+	.ctx_length = sizeof(sha4_context),
+};
+
+static int digest_sha512_init(struct digest *d)
+{
+	sha4_starts(d->ctx, 0);
+
+	return 0;
+}
+
+static struct digest_algo m512 = {
+	.name = "sha512",
+	.init = digest_sha512_init,
+	.update = digest_sha4_update,
+	.final = digest_sha4_final,
+	.length = SHA512_SUM_LEN,
+	.ctx_length = sizeof(sha4_context),
+};
+
+static int sha4_digest_register(void)
+{
+	if IS_ENABLED(CONFIG_SHA384)
+		digest_algo_register(&m384);
+
+	if IS_ENABLED(CONFIG_SHA512)
+		digest_algo_register(&m512);
+
+	return 0;
+}
+device_initcall(sha4_digest_register);
-- 
2.1.4


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