[SLOF] [PATCH v3 4/7] tcgbios: Add implementations for sha1, sha384, and sha512
Stefan Berger
stefanb at linux.vnet.ibm.com
Fri Jul 9 12:53:10 AEST 2021
From: Stefan Berger <stefanb at linux.ibm.com>
Signed-off-by: Stefan Berger <stefanb at linux.ibm.com>
---
lib/libtpm/Makefile | 2 +-
lib/libtpm/sha.c | 205 +++++++++++++++++++++++++++
lib/libtpm/{sha256.h => sha.h} | 9 +-
lib/libtpm/sha256.c | 2 +-
lib/libtpm/sha512.c | 249 +++++++++++++++++++++++++++++++++
lib/libtpm/tcgbios.c | 2 +-
6 files changed, 463 insertions(+), 6 deletions(-)
create mode 100644 lib/libtpm/sha.c
rename lib/libtpm/{sha256.h => sha.h} (70%)
create mode 100644 lib/libtpm/sha512.c
diff --git a/lib/libtpm/Makefile b/lib/libtpm/Makefile
index bcfe88d..9d32dfc 100644
--- a/lib/libtpm/Makefile
+++ b/lib/libtpm/Makefile
@@ -23,7 +23,7 @@ TARGET = ../libtpm.a
all: $(TARGET)
-SRCS = tpm_drivers.c sha256.c tcgbios.c
+SRCS = tpm_drivers.c sha.c sha256.c sha512.c tcgbios.c
OBJS = $(SRCS:%.c=%.o)
diff --git a/lib/libtpm/sha.c b/lib/libtpm/sha.c
new file mode 100644
index 0000000..43de658
--- /dev/null
+++ b/lib/libtpm/sha.c
@@ -0,0 +1,205 @@
+/*****************************************************************************
+ * Copyright (c) 2015-2021 IBM Corporation
+ * All rights reserved.
+ * This program and the accompanying materials
+ * are made available under the terms of the BSD License
+ * which accompanies this distribution, and is available at
+ * http://www.opensource.org/licenses/bsd-license.php
+ *
+ * Contributors:
+ * IBM Corporation - initial implementation
+ *****************************************************************************/
+
+/*
+ * See: NIST standard for SHA-1 in FIPS PUB 180-4
+ */
+
+#include "byteorder.h"
+#include "sha.h"
+#include "string.h"
+
+typedef struct _sha1_ctx {
+ uint32_t h[5];
+} sha1_ctx;
+
+#define rol(VAL, N) \
+({ \
+ uint32_t res; \
+ __asm__ ( \
+ "rotlwi %0, %1, %2\n\t" \
+ : "=r" (res) \
+ : "r" (VAL), "i" (N) \
+ ); \
+ res; \
+})
+
+static void sha1_block(uint32_t *w, sha1_ctx *ctx)
+{
+ uint32_t i;
+ uint32_t a,b,c,d,e,f;
+ uint32_t tmp;
+ uint32_t idx;
+
+ /*
+ * FIPS 180-4 4.2.1: SHA1 Constants
+ */
+ static const uint32_t sha_ko[4] = {
+ 0x5a827999, 0x6ed9eba1, 0x8f1bbcdc, 0xca62c1d6
+ };
+
+ /*
+ * FIPS 180-4 6.1.2: step 1
+ *
+ * 0 <= i <= 15:
+ * W(t) = M(t)
+ * 16 <= i <= 79:
+ * W(t) = ROTL(W(t-3) XOR W(t-8) XOR W(t-14) XOR W(t-16), 1)
+ */
+
+ /* w(0)..w(15) are in big endian format */
+ for (i = 0; i <= 15; i++)
+ w[i] = be32_to_cpu(w[i]);
+
+ for (i = 16; i <= 79; i++) {
+ tmp = w[i-3] ^ w[i-8] ^ w[i-14] ^ w[i-16];
+ w[i] = rol(tmp, 1);
+ }
+
+ /*
+ * step 2: a = H0, b = H1, c = H2, d = H3, e = H4.
+ */
+ a = ctx->h[0];
+ b = ctx->h[1];
+ c = ctx->h[2];
+ d = ctx->h[3];
+ e = ctx->h[4];
+
+ /*
+ * step 3: For i = 0 to 79:
+ * T = ROTL(a, 5) + f(i; b,c,d) + e + W(t) + K(t);
+ */
+ for (i = 0; i <= 79; i++) {
+ /*
+ * FIPS 180-4: 4.1.1 : definition of f(i; b,c,d)
+ */
+ if (i <= 19) {
+ /*
+ * 0 <= i <= 19:
+ * f(i; b,c,d) = (b AND c) OR ((NOT b) AND d)
+ */
+ f = (b & c) | ((b ^ 0xffffffff) & d);
+ idx = 0;
+ } else if (i <= 39) {
+ /*
+ * 20 <= i <= 39:
+ * f(i; b,c,d) = b XOR c XOR d
+ */
+ f = b ^ c ^ d;
+ idx = 1;
+ } else if (i <= 59) {
+ /*
+ * 40 <= i <= 59:
+ * f(i; b,c,d) = (b AND c) OR (b AND d) OR (c AND d)
+ */
+ f = (b & c) | (b & d) | (c & d);
+ idx = 2;
+ } else {
+ /*
+ * 60 <= i <= 79:
+ * f(i; b,c,d) = b XOR c XOR d
+ */
+ f = b ^ c ^ d;
+ idx = 3;
+ }
+
+ /*
+ * step 3:
+ * t = ROTL(a, 5) + f(t;b,c,d) + e + K(t) + W(t);
+ * e = d; d = c; c = ROTL(b, 30); b = a; a = t;
+ */
+ tmp = rol(a, 5) +
+ f +
+ e +
+ sha_ko[idx] +
+ w[i];
+ e = d;
+ d = c;
+ c = rol(b, 30);
+ b = a;
+ a = tmp;
+ }
+
+ /*
+ * step 4:
+ * H0 = a + H0, H1 = b + H1, H2 = c + H2, H3 = d + H3, H4 = e + H4
+ */
+ ctx->h[0] += a;
+ ctx->h[1] += b;
+ ctx->h[2] += c;
+ ctx->h[3] += d;
+ ctx->h[4] += e;
+}
+
+static void sha1_do(sha1_ctx *ctx, const uint8_t *data32, uint32_t length)
+{
+ uint32_t offset = 0;
+ uint16_t num;
+ uint64_t bits = 0;
+ uint32_t w[80];
+ uint64_t tmp;
+
+ /* treat data in 64-byte chunks */
+ for (offset = 0; length - offset >= 64; offset += 64) {
+ memcpy(w, data32 + offset, 64);
+ sha1_block((uint32_t *)w, ctx);
+ bits += (64 * 8);
+ }
+
+ /* last block with less than 64 bytes */
+ num = length - offset;
+ bits += (num << 3);
+
+ memcpy(w, data32 + offset, num);
+ /*
+ * FIPS 180-4 5.1: Padding the Message
+ */
+ ((uint8_t *)w)[num] = 0x80;
+ if (64 - (num + 1) > 0)
+ memset( &((uint8_t *)w)[num + 1], 0, 64 - (num + 1));
+
+ if (num >= 56) {
+ /* cannot append number of bits here */
+ sha1_block((uint32_t *)w, ctx);
+ memset(w, 0, 60);
+ }
+
+ /* write number of bits to end of block */
+ tmp = cpu_to_be64(bits);
+ memcpy(&w[14], &tmp, 8);
+
+ sha1_block(w, ctx);
+
+ /* need to switch result's endianness */
+ for (num = 0; num < 5; num++)
+ ctx->h[num] = cpu_to_be32(ctx->h[num]);
+}
+
+void sha1(const uint8_t *data, uint32_t length, uint8_t *hash)
+{
+ sha1_ctx ctx = {
+ .h = {
+ /*
+ * FIPS 180-4: 6.1.1
+ * -> 5.3.1: initial hash value
+ */
+ 0x67452301,
+ 0xefcdab89,
+ 0x98badcfe,
+ 0x10325476,
+ 0xc3d2e1f0,
+ }
+ };
+
+ sha1_do(&ctx, data, length);
+ memcpy(hash, &ctx.h[0], 20);
+}
diff --git a/lib/libtpm/sha256.h b/lib/libtpm/sha.h
similarity index 70%
rename from lib/libtpm/sha256.h
rename to lib/libtpm/sha.h
index 04b774b..0bb031e 100644
--- a/lib/libtpm/sha256.h
+++ b/lib/libtpm/sha.h
@@ -10,11 +10,14 @@
* IBM Corporation - initial implementation
*****************************************************************************/
-#ifndef __SHA256_H
-#define __SHA256_H
+#ifndef __SHA_H
+#define __SHA_H
#include "types.h"
+void sha1(const uint8_t *data, uint32_t length, uint8_t *hash);
void sha256(const uint8_t *data, uint32_t length, uint8_t *hash);
+void sha384(const uint8_t *data, uint32_t length, uint8_t *hash);
+void sha512(const uint8_t *data, uint32_t length, uint8_t *hash);
-#endif /* __SHA256_H */
+#endif /* __SHA_H */
diff --git a/lib/libtpm/sha256.c b/lib/libtpm/sha256.c
index 110dc37..1a0aa9a 100644
--- a/lib/libtpm/sha256.c
+++ b/lib/libtpm/sha256.c
@@ -15,7 +15,7 @@
*/
#include "byteorder.h"
-#include "sha256.h"
+#include "sha.h"
#include "string.h"
typedef struct _sha256_ctx {
diff --git a/lib/libtpm/sha512.c b/lib/libtpm/sha512.c
new file mode 100644
index 0000000..f9267ef
--- /dev/null
+++ b/lib/libtpm/sha512.c
@@ -0,0 +1,249 @@
+/*****************************************************************************
+ * Copyright (c) 2021 IBM Corporation
+ * All rights reserved.
+ * This program and the accompanying materials
+ * are made available under the terms of the BSD License
+ * which accompanies this distribution, and is available at
+ * http://www.opensource.org/licenses/bsd-license.php
+ *
+ * Contributors:
+ * IBM Corporation - initial implementation
+ *****************************************************************************/
+
+/*
+ * See: NIST standard for SHA-512 and SHA-384 in FIPS PUB 180-4 & RFC 6234
+ */
+
+#include "byteorder.h"
+#include "sha.h"
+#include "string.h"
+
+typedef struct _sha512_ctx {
+ uint64_t h[8];
+} sha512_ctx;
+
+#define rotr(VAL, N) \
+({ \
+ uint64_t res; \
+ __asm__ ( \
+ "rotrdi %0, %1, %2\n\t" \
+ : "=r" (res) \
+ : "r" (VAL), "i" (N) \
+ ); \
+ res; \
+})
+
+static inline uint64_t Ch(uint64_t x, uint64_t y, uint64_t z)
+{
+ return (x & y) ^ ((x ^ 0xffffffffffffffffULL) & z);
+}
+
+static inline uint64_t Maj(uint64_t x, uint64_t y, uint64_t z)
+{
+ return (x & y) ^ (x & z) ^ (y & z);
+}
+
+static inline uint64_t sum0(uint64_t x)
+{
+ return rotr(x, 28) ^ rotr(x, 34) ^ rotr(x, 39);
+}
+
+static inline uint64_t sum1(uint64_t x)
+{
+ return rotr(x, 14) ^ rotr(x, 18) ^ rotr(x, 41);
+}
+
+static inline uint64_t sigma0(uint64_t x)
+{
+ return rotr(x, 1) ^ rotr(x, 8) ^ (x >> 7);
+}
+
+static inline uint64_t sigma1(uint64_t x)
+{
+ return rotr(x, 19) ^ rotr(x, 61) ^ (x >> 6);
+}
+
+static void sha512_block(uint64_t *w, sha512_ctx *ctx)
+{
+ uint32_t t;
+ uint64_t a, b, c, d, e, f, g, h;
+ uint64_t T1, T2;
+
+ /*
+ * FIPS 180-4 4.2.2: SHA512 Constants
+ */
+ static const uint64_t sha_ko[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
+ };
+
+ /*
+ * FIPS 180-4 6.4.2: step 1
+ *
+ * 0 <= i <= 15:
+ * W(t) = M(t)
+ * 16 <= i <= 79:
+ * W(t) = sigma1(W(t-2)) + W(t-7) + sigma0(W(t-15)) + W(t-16)
+ */
+
+ /* w(0)..w(15) are in big endian format */
+ for (t = 0; t <= 15; t++)
+ w[t] = be64_to_cpu(w[t]);
+
+ for (t = 16; t <= 79; t++)
+ w[t] = sigma1(w[t-2]) + w[t-7] + sigma0(w[t-15]) + w[t-16];
+
+ /*
+ * step 2: a = H0, b = H1, c = H2, d = H3, e = H4, f = H5, g = H6, h = H7
+ */
+ a = ctx->h[0];
+ b = ctx->h[1];
+ c = ctx->h[2];
+ d = ctx->h[3];
+ e = ctx->h[4];
+ f = ctx->h[5];
+ g = ctx->h[6];
+ h = ctx->h[7];
+
+ /*
+ * step 3: For i = 0 to 79:
+ * T1 = h + sum1(e) + Ch(e,f,g) + K(t) + W(t);
+ * T2 = sum0(a) + Maj(a,b,c)
+ * h = g; g = f; f = e; e = d + T1; d = c; c = b; b = a; a + T1 + T2
+ */
+ for (t = 0; t <= 79; t++) {
+ T1 = h + sum1(e) + Ch(e, f, g) + sha_ko[t] + w[t];
+ T2 = sum0(a) + Maj(a, b, c);
+ h = g;
+ g = f;
+ f = e;
+ e = d + T1;
+ d = c;
+ c = b;
+ b = a;
+ a = T1 + T2;
+ }
+
+ /*
+ * step 4:
+ * H0 = a + H0, H1 = b + H1, H2 = c + H2, H3 = d + H3, H4 = e + H4
+ */
+ ctx->h[0] += a;
+ ctx->h[1] += b;
+ ctx->h[2] += c;
+ ctx->h[3] += d;
+ ctx->h[4] += e;
+ ctx->h[5] += f;
+ ctx->h[6] += g;
+ ctx->h[7] += h;
+}
+
+static void sha512_do(sha512_ctx *ctx, const uint8_t *data32, uint32_t length)
+{
+ uint32_t offset;
+ uint16_t num;
+ uint64_t bits = 0;
+ uint64_t w[80];
+ uint64_t tmp;
+
+ /* treat data in 128-byte/1024 bit chunks */
+ for (offset = 0; length - offset >= 128; offset += 128) {
+ memcpy(w, data32 + offset, 128);
+ sha512_block(w, ctx);
+ bits += (128 * 8);
+ }
+
+ /* last block with less than 128 bytes */
+ num = length - offset;
+ bits += (num << 3);
+
+ memcpy(w, data32 + offset, num);
+ /*
+ * FIPS 180-4 5.1: Padding the Message
+ */
+ ((uint8_t *)w)[num] = 0x80;
+ if (128 - (num + 1) > 0)
+ memset( &((uint8_t *)w)[num + 1], 0, 128 - (num + 1));
+
+ if (num >= 112) {
+ /* cannot append number of bits here;
+ * need space for 128 bits (16 bytes)
+ */
+ sha512_block((uint64_t *)w, ctx);
+ memset(w, 0, 128);
+ }
+
+ /* write number of bits to end of the block; we write 64 bits */
+ tmp = cpu_to_be64(bits);
+ memcpy(&w[15], &tmp, 8);
+
+ sha512_block(w, ctx);
+
+ /* need to switch result's endianness */
+ for (num = 0; num < 8; num++)
+ ctx->h[num] = cpu_to_be64(ctx->h[num]);
+}
+
+void sha384(const uint8_t *data, uint32_t length, uint8_t *hash)
+{
+ sha512_ctx ctx = {
+ .h = {
+ /*
+ * FIPS 180-4: 6.2.1
+ * -> 5.3.4: initial hash value
+ */
+ 0xcbbb9d5dc1059ed8,
+ 0x629a292a367cd507,
+ 0x9159015a3070dd17,
+ 0x152fecd8f70e5939,
+ 0x67332667ffc00b31,
+ 0x8eb44a8768581511,
+ 0xdb0c2e0d64f98fa7,
+ 0x47b5481dbefa4fa4
+ }
+ };
+
+ sha512_do(&ctx, data, length);
+ memcpy(hash, ctx.h, 384/8);
+}
+
+void sha512(const uint8_t *data, uint32_t length, uint8_t *hash)
+{
+ sha512_ctx ctx = {
+ .h = {
+ /*
+ * FIPS 180-4: 6.2.1
+ * -> 5.3.5: initial hash value
+ */
+ 0x6a09e667f3bcc908,
+ 0xbb67ae8584caa73b,
+ 0x3c6ef372fe94f82b,
+ 0xa54ff53a5f1d36f1,
+ 0x510e527fade682d1,
+ 0x9b05688c2b3e6c1f,
+ 0x1f83d9abfb41bd6b,
+ 0x5be0cd19137e2179
+ }
+ };
+
+ sha512_do(&ctx, data, length);
+ memcpy(hash, ctx.h, sizeof(ctx.h));
+}
diff --git a/lib/libtpm/tcgbios.c b/lib/libtpm/tcgbios.c
index 690c4b2..8a0f6cc 100644
--- a/lib/libtpm/tcgbios.c
+++ b/lib/libtpm/tcgbios.c
@@ -29,7 +29,7 @@
#include "tcgbios.h"
#include "tcgbios_int.h"
#include "stdio.h"
-#include "sha256.h"
+#include "sha.h"
#include "helpers.h"
#include "version.h"
#include "OF.h"
--
2.17.1
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