9 files changed, 302 insertions, 0 deletions
diff --git a/src/Crypto/Crypto.vcxproj b/src/Crypto/Crypto.vcxproj
index 97a472f7..0f79395f 100644
--- a/src/Crypto/Crypto.vcxproj
+++ b/src/Crypto/Crypto.vcxproj
@@ -223,6 +223,7 @@
     <ClCompile Include="SerpentFast.c" />
     <ClCompile Include="SerpentFast_simd.cpp" />
     <ClCompile Include="Sha2.c" />
+    <ClCompile Include="Sha2Intel.c" />
     <ClCompile Include="Streebog.c" />
     <ClCompile Include="t1ha2.c" />
     <ClCompile Include="t1ha2_selfcheck.c" />
diff --git a/src/Crypto/Crypto.vcxproj.filters b/src/Crypto/Crypto.vcxproj.filters
index 5d149bdd..3d384f97 100644
--- a/src/Crypto/Crypto.vcxproj.filters
+++ b/src/Crypto/Crypto.vcxproj.filters
@@ -87,6 +87,9 @@
     <ClCompile Include="blake2s_SSSE3.c">
       <Filter>Source Files</Filter>
     </ClCompile>
+    <ClCompile Include="Sha2Intel.c">
+      <Filter>Source Files</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="Aes.h">
diff --git a/src/Crypto/Crypto_vs2019.vcxproj b/src/Crypto/Crypto_vs2019.vcxproj
index ab3d5f3b..0abf740a 100644
--- a/src/Crypto/Crypto_vs2019.vcxproj
+++ b/src/Crypto/Crypto_vs2019.vcxproj
@@ -339,6 +339,7 @@
     <ClCompile Include="SerpentFast.c" />
     <ClCompile Include="SerpentFast_simd.cpp" />
     <ClCompile Include="Sha2.c" />
+    <ClCompile Include="Sha2Intel.c" />
     <ClCompile Include="Streebog.c" />
     <ClCompile Include="t1ha2.c" />
     <ClCompile Include="t1ha2_selfcheck.c" />
diff --git a/src/Crypto/Sha2.c b/src/Crypto/Sha2.c
index 3cce21d7..5ae9cae2 100644
--- a/src/Crypto/Sha2.c
+++ b/src/Crypto/Sha2.c
@@ -306,6 +306,9 @@ extern "C"
 	void sha256_sse4(void *input_data, uint_32t digest[8], uint_64t num_blks);
 	void sha256_rorx(void *input_data, uint_32t digest[8], uint_64t num_blks);
 	void sha256_avx(void *input_data, uint_32t digest[8], uint_64t num_blks);
+#if CRYPTOPP_SHANI_AVAILABLE
+	void sha256_intel(void *input_data, uint_32t digest[8], uint_64t num_blks);
+#endif
 #endif
 
 #if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32
@@ -717,6 +720,13 @@ void StdSha256Transform(sha256_ctx* ctx, void* mp, uint_64t num_blks)
 #ifndef NO_OPTIMIZED_VERSIONS
 
 #if CRYPTOPP_BOOL_X64
+#if CRYPTOPP_SHANI_AVAILABLE
+void IntelSha256Transform(sha256_ctx* ctx, void* mp, uint_64t num_blks)
+{
+	sha256_intel(mp, ctx->hash, num_blks);
+}
+#endif
+
 void Avx2Sha256Transform(sha256_ctx* ctx, void* mp, uint_64t num_blks)
 {
 	if (num_blks > 1)
@@ -775,6 +785,11 @@ void sha256_begin(sha256_ctx* ctx)
 	{
 #ifndef NO_OPTIMIZED_VERSIONS
 #if CRYPTOPP_BOOL_X64
+#if CRYPTOPP_SHANI_AVAILABLE
+		if (HasSHA256())
+			sha256transfunc = IntelSha256Transform;
+		else
+#endif
 		if (g_isIntel && HasSAVX2() && HasSBMI2())
 			sha256transfunc = Avx2Sha256Transform;
 		else if (g_isIntel && HasSAVX())
diff --git a/src/Crypto/Sha2Intel.c b/src/Crypto/Sha2Intel.c
new file mode 100644
index 00000000..c926f76a
--- /dev/null
+++ b/src/Crypto/Sha2Intel.c
@@ -0,0 +1,218 @@
+/*
+* Support for SHA-256 x86 instrinsic
+* Based on public domain code by Sean Gulley
+*    (https://github.com/mitls/hacl-star/tree/master/experimental/hash)
+*
+* Botan is released under the Simplified BSD License (see license.txt)
+*/
+
+/* November 10th 2024: Modified for VeraCrypt */
+
+#include "Sha2.h"
+#include "Common/Endian.h"
+#include "cpu.h"
+#include "misc.h"
+
+#if defined(_UEFI) || defined(CRYPTOPP_DISABLE_ASM)
+#define NO_OPTIMIZED_VERSIONS
+#endif
+
+#ifndef NO_OPTIMIZED_VERSIONS
+
+#if CRYPTOPP_SHANI_AVAILABLE
+
+//
+void sha256_intel(void *mp, uint_32t state[8], uint_64t num_blks) 
+{
+    // Constants table - align for better performance
+    CRYPTOPP_ALIGN_DATA(64) 
+    static const uint_32t K[64] = {
+        0x428A2F98, 0x71374491, 0xB5C0FBCF, 0xE9B5DBA5, 0x3956C25B, 0x59F111F1, 0x923F82A4, 0xAB1C5ED5,
+        0xD807AA98, 0x12835B01, 0x243185BE, 0x550C7DC3, 0x72BE5D74, 0x80DEB1FE, 0x9BDC06A7, 0xC19BF174,
+        0xE49B69C1, 0xEFBE4786, 0x0FC19DC6, 0x240CA1CC, 0x2DE92C6F, 0x4A7484AA, 0x5CB0A9DC, 0x76F988DA,
+        0x983E5152, 0xA831C66D, 0xB00327C8, 0xBF597FC7, 0xC6E00BF3, 0xD5A79147, 0x06CA6351, 0x14292967,
+        0x27B70A85, 0x2E1B2138, 0x4D2C6DFC, 0x53380D13, 0x650A7354, 0x766A0ABB, 0x81C2C92E, 0x92722C85,
+        0xA2BFE8A1, 0xA81A664B, 0xC24B8B70, 0xC76C51A3, 0xD192E819, 0xD6990624, 0xF40E3585, 0x106AA070,
+        0x19A4C116, 0x1E376C08, 0x2748774C, 0x34B0BCB5, 0x391C0CB3, 0x4ED8AA4A, 0x5B9CCA4F, 0x682E6FF3,
+        0x748F82EE, 0x78A5636F, 0x84C87814, 0x8CC70208, 0x90BEFFFA, 0xA4506CEB, 0xBEF9A3F7, 0xC67178F2,
+    };
+
+    const __m128i* K_mm = (const __m128i*)K;
+    const __m128i* input_mm = (const __m128i*)mp;
+    
+    // Create byte shuffle mask for big-endian to little-endian conversion
+    const __m128i MASK = _mm_set_epi64x(0x0c0d0e0f08090a0b, 0x0405060700010203);
+
+    // Load initial values
+    __m128i STATE0 = _mm_loadu_si128((__m128i*)&state[0]);
+    __m128i STATE1 = _mm_loadu_si128((__m128i*)&state[4]);
+
+    // Adjust byte ordering
+    STATE0 = _mm_shuffle_epi32(STATE0, 0xB1);  // CDAB
+    STATE1 = _mm_shuffle_epi32(STATE1, 0x1B);  // EFGH
+
+    __m128i TMP = _mm_alignr_epi8(STATE0, STATE1, 8);  // ABEF
+    STATE1 = _mm_blend_epi16(STATE1, STATE0, 0xF0);    // CDGH
+    STATE0 = TMP;
+
+    while(num_blks > 0) {
+        // Save current state
+        const __m128i ABEF_SAVE = STATE0;
+        const __m128i CDGH_SAVE = STATE1;
+
+        __m128i MSG;
+
+        __m128i TMSG0 = _mm_shuffle_epi8(_mm_loadu_si128(input_mm), MASK);
+        __m128i TMSG1 = _mm_shuffle_epi8(_mm_loadu_si128(input_mm + 1), MASK);
+        __m128i TMSG2 = _mm_shuffle_epi8(_mm_loadu_si128(input_mm + 2), MASK);
+        __m128i TMSG3 = _mm_shuffle_epi8(_mm_loadu_si128(input_mm + 3), MASK);
+
+        // Rounds 0-3
+        MSG = _mm_add_epi32(TMSG0, _mm_load_si128(K_mm));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        // Rounds 4-7
+        MSG = _mm_add_epi32(TMSG1, _mm_load_si128(K_mm + 1));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG0 = _mm_sha256msg1_epu32(TMSG0, TMSG1);
+
+        // Rounds 8-11
+        MSG = _mm_add_epi32(TMSG2, _mm_load_si128(K_mm + 2));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG1 = _mm_sha256msg1_epu32(TMSG1, TMSG2);
+
+        // Rounds 12-15
+        MSG = _mm_add_epi32(TMSG3, _mm_load_si128(K_mm + 3));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG0 = _mm_add_epi32(TMSG0, _mm_alignr_epi8(TMSG3, TMSG2, 4));
+        TMSG0 = _mm_sha256msg2_epu32(TMSG0, TMSG3);
+        TMSG2 = _mm_sha256msg1_epu32(TMSG2, TMSG3);
+
+        // Rounds 16-19
+        MSG = _mm_add_epi32(TMSG0, _mm_load_si128(K_mm + 4));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG1 = _mm_add_epi32(TMSG1, _mm_alignr_epi8(TMSG0, TMSG3, 4));
+        TMSG1 = _mm_sha256msg2_epu32(TMSG1, TMSG0);
+        TMSG3 = _mm_sha256msg1_epu32(TMSG3, TMSG0);
+
+        // Rounds 20-23
+        MSG = _mm_add_epi32(TMSG1, _mm_load_si128(K_mm + 5));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG2 = _mm_add_epi32(TMSG2, _mm_alignr_epi8(TMSG1, TMSG0, 4));
+        TMSG2 = _mm_sha256msg2_epu32(TMSG2, TMSG1);
+        TMSG0 = _mm_sha256msg1_epu32(TMSG0, TMSG1);
+
+        // Rounds 24-27
+        MSG = _mm_add_epi32(TMSG2, _mm_load_si128(K_mm + 6));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG3 = _mm_add_epi32(TMSG3, _mm_alignr_epi8(TMSG2, TMSG1, 4));
+        TMSG3 = _mm_sha256msg2_epu32(TMSG3, TMSG2);
+        TMSG1 = _mm_sha256msg1_epu32(TMSG1, TMSG2);
+
+        // Rounds 28-31
+        MSG = _mm_add_epi32(TMSG3, _mm_load_si128(K_mm + 7));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG0 = _mm_add_epi32(TMSG0, _mm_alignr_epi8(TMSG3, TMSG2, 4));
+        TMSG0 = _mm_sha256msg2_epu32(TMSG0, TMSG3);
+        TMSG2 = _mm_sha256msg1_epu32(TMSG2, TMSG3);
+
+        // Rounds 32-35
+        MSG = _mm_add_epi32(TMSG0, _mm_load_si128(K_mm + 8));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG1 = _mm_add_epi32(TMSG1, _mm_alignr_epi8(TMSG0, TMSG3, 4));
+        TMSG1 = _mm_sha256msg2_epu32(TMSG1, TMSG0);
+        TMSG3 = _mm_sha256msg1_epu32(TMSG3, TMSG0);
+
+        // Rounds 36-39
+        MSG = _mm_add_epi32(TMSG1, _mm_load_si128(K_mm + 9));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG2 = _mm_add_epi32(TMSG2, _mm_alignr_epi8(TMSG1, TMSG0, 4));
+        TMSG2 = _mm_sha256msg2_epu32(TMSG2, TMSG1);
+        TMSG0 = _mm_sha256msg1_epu32(TMSG0, TMSG1);
+
+        // Rounds 40-43
+        MSG = _mm_add_epi32(TMSG2, _mm_load_si128(K_mm + 10));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG3 = _mm_add_epi32(TMSG3, _mm_alignr_epi8(TMSG2, TMSG1, 4));
+        TMSG3 = _mm_sha256msg2_epu32(TMSG3, TMSG2);
+        TMSG1 = _mm_sha256msg1_epu32(TMSG1, TMSG2);
+
+        // Rounds 44-47
+        MSG = _mm_add_epi32(TMSG3, _mm_load_si128(K_mm + 11));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG0 = _mm_add_epi32(TMSG0, _mm_alignr_epi8(TMSG3, TMSG2, 4));
+        TMSG0 = _mm_sha256msg2_epu32(TMSG0, TMSG3);
+        TMSG2 = _mm_sha256msg1_epu32(TMSG2, TMSG3);
+
+        // Rounds 48-51
+        MSG = _mm_add_epi32(TMSG0, _mm_load_si128(K_mm + 12));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG1 = _mm_add_epi32(TMSG1, _mm_alignr_epi8(TMSG0, TMSG3, 4));
+        TMSG1 = _mm_sha256msg2_epu32(TMSG1, TMSG0);
+        TMSG3 = _mm_sha256msg1_epu32(TMSG3, TMSG0);
+
+        // Rounds 52-55
+        MSG = _mm_add_epi32(TMSG1, _mm_load_si128(K_mm + 13));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG2 = _mm_add_epi32(TMSG2, _mm_alignr_epi8(TMSG1, TMSG0, 4));
+        TMSG2 = _mm_sha256msg2_epu32(TMSG2, TMSG1);
+
+        // Rounds 56-59
+        MSG = _mm_add_epi32(TMSG2, _mm_load_si128(K_mm + 14));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        TMSG3 = _mm_add_epi32(TMSG3, _mm_alignr_epi8(TMSG2, TMSG1, 4));
+        TMSG3 = _mm_sha256msg2_epu32(TMSG3, TMSG2);
+
+        // Rounds 60-63
+        MSG = _mm_add_epi32(TMSG3, _mm_load_si128(K_mm + 15));
+        STATE1 = _mm_sha256rnds2_epu32(STATE1, STATE0, MSG);
+        STATE0 = _mm_sha256rnds2_epu32(STATE0, STATE1, _mm_shuffle_epi32(MSG, 0x0E));
+
+        // Add values back to state
+        STATE0 = _mm_add_epi32(STATE0, ABEF_SAVE);
+        STATE1 = _mm_add_epi32(STATE1, CDGH_SAVE);
+
+        input_mm += 4;
+        num_blks--;
+    }
+
+    // Shuffle state back to correct order
+    STATE0 = _mm_shuffle_epi32(STATE0, 0x1B);  // FEBA
+    STATE1 = _mm_shuffle_epi32(STATE1, 0xB1);  // DCHG
+
+    // Save state
+    _mm_storeu_si128((__m128i*)&state[0], _mm_blend_epi16(STATE0, STATE1, 0xF0));  // DCBA
+    _mm_storeu_si128((__m128i*)&state[4], _mm_alignr_epi8(STATE1, STATE0, 8));     // HGFE
+}
+
+#endif
+#endif
diff --git a/src/Crypto/Sources b/src/Crypto/Sources
index 9542d4b6..bd990382 100644
--- a/src/Crypto/Sources
+++ b/src/Crypto/Sources
@@ -39,6 +39,7 @@ SOURCES = \
 	SerpentFast.c \
 	SerpentFast_simd.cpp \
 	Sha2.c \
+	Sha2Intel.c \
 	t1ha_selfcheck.c \
 	t1ha2.c \
 	t1ha2_selfcheck.c \
diff --git a/src/Crypto/config.h b/src/Crypto/config.h
index d2a9cfea..774f7951 100644
--- a/src/Crypto/config.h
+++ b/src/Crypto/config.h
@@ -152,6 +152,15 @@
     #define CRYPTOPP_BOOL_SSE41_INTRINSICS_AVAILABLE 0
 #endif
 
+#if !defined(CRYPTOPP_DISABLE_SHANI) && !defined(_M_ARM) && !defined(_M_ARM64) && !defined(__arm__) && !defined(__aarch64__) && !defined(__arm64__) && defined(CRYPTOPP_BOOL_SSE41_INTRINSICS_AVAILABLE) && \
+	(defined(__SHA__) || (_MSC_VER >= 1900) || (__SUNPRO_CC >= 0x5160) || \
+	(CRYPTOPP_GCC_VERSION >= 40900) || (__INTEL_COMPILER >= 1600) || \
+	(CRYPTOPP_LLVM_CLANG_VERSION >= 30400) || (CRYPTOPP_APPLE_CLANG_VERSION >= 50100))
+	#define CRYPTOPP_SHANI_AVAILABLE 1
+#else
+	#define CRYPTOPP_SHANI_AVAILABLE 0
+#endif
+
 // how to allocate 16-byte aligned memory (for SSE2)
 #if defined(_MSC_VER)
 	#define CRYPTOPP_MM_MALLOC_AVAILABLE
diff --git a/src/Crypto/cpu.c b/src/Crypto/cpu.c
index effde6ba..174596eb 100644
--- a/src/Crypto/cpu.c
+++ b/src/Crypto/cpu.c
@@ -17,6 +17,10 @@
 
 #ifdef CRYPTOPP_CPUID_AVAILABLE
 
+#if defined(__GNUC__) || defined(__clang__)
+	#include <cpuid.h> // for __get_cpuid and __get_cpuid_count
+#endif
+
 #if _MSC_VER >= 1400 && CRYPTOPP_BOOL_X64
 
 int CpuId(uint32 input, uint32 output[4])
@@ -207,6 +211,7 @@ volatile int g_x86DetectionDone = 0;
 volatile int g_hasISSE = 0, g_hasSSE2 = 0, g_hasSSSE3 = 0, g_hasMMX = 0, g_hasAESNI = 0, g_hasCLMUL = 0, g_isP4 = 0;
 volatile int g_hasAVX = 0, g_hasAVX2 = 0, g_hasBMI2 = 0, g_hasSSE42 = 0, g_hasSSE41 = 0, g_isIntel = 0, g_isAMD = 0;
 volatile int g_hasRDRAND = 0, g_hasRDSEED = 0;
+volatile int g_hasSHA256 = 0;
 volatile uint32 g_cacheLineSize = CRYPTOPP_L1_CACHE_LINE_SIZE;
 
 VC_INLINE int IsIntel(const uint32 output[4])
@@ -306,6 +311,35 @@ static int Detect_MS_HyperV_AES ()
 
 #endif
 
+static BOOL CheckSHA256Support() {
+#if CRYPTOPP_BOOL_X64 && CRYPTOPP_SHANI_AVAILABLE
+#if defined(_MSC_VER) // Windows with MSVC
+    int cpuInfo[4] = { 0 };
+    __cpuidex(cpuInfo, 7, 0);
+    return (cpuInfo[1] & (1 << 29)) != 0? TRUE : FALSE;
+
+#elif defined(__GNUC__) || defined(__clang__) // Linux, FreeBSD, macOS with GCC/Clang
+    unsigned int eax = 0, ebx = 0, ecx = 0, edx = 0;
+    // First check if CPUID leaf 7 is supported
+    if (__get_cpuid(0, &eax, &ebx, &ecx, &edx)) {
+        if (eax >= 7) {
+            // Now check SHA-256 support in leaf 7, sub-leaf 0
+            if (__get_cpuid_count(7, 0, &eax, &ebx, &ecx, &edx)) {
+                return (ebx & (1 << 29)) != 0? TRUE : FALSE;
+            }
+        }
+    }
+    return FALSE;
+
+#else
+    #error "Unsupported compiler"
+#endif
+#else
+	return FALSE;
+#endif
+}
+
+
 void DetectX86Features()
 {
 	uint32 cpuid[4] = {0}, cpuid1[4] = {0}, cpuid2[4] = {0};
@@ -334,6 +368,7 @@ void DetectX86Features()
 	g_hasAESNI = g_hasSSE2 && (cpuid1[2] & (1<<25));
 #endif
 	g_hasCLMUL = g_hasSSE2 && (cpuid1[2] & (1<<1));
+	g_hasSHA256 = CheckSHA256Support();
 
 #if !defined (_UEFI) && ((defined(__AES__) && defined(__PCLMUL__)) || defined(__INTEL_COMPILER) || CRYPTOPP_BOOL_AESNI_INTRINSICS_AVAILABLE)
 	// Hypervisor = bit 31 of ECX of CPUID leaf 0x1
@@ -439,6 +474,7 @@ void DisableCPUExtendedFeatures ()
 	g_hasSSSE3 = 0;
 	g_hasAESNI = 0;
 	g_hasCLMUL = 0;
+	g_hasSHA256 = 0;
 }
 
 #endif
diff --git a/src/Crypto/cpu.h b/src/Crypto/cpu.h
index 2661bf1c..b0df6462 100644
--- a/src/Crypto/cpu.h
+++ b/src/Crypto/cpu.h
@@ -207,6 +207,22 @@ extern __m128i _mm_aesdeclast_si128(__m128i v, __m128i rkey);
 #endif
 #endif
 
+#if CRYPTOPP_SHANI_AVAILABLE
+#if defined(TC_WINDOWS_DRIVER) || defined (_UEFI)
+#if defined(__cplusplus)
+extern "C" {
+#endif
+extern __m128i __cdecl _mm_sha256msg1_epu32(__m128i, __m128i);
+extern __m128i __cdecl _mm_sha256msg2_epu32(__m128i, __m128i);
+extern __m128i __cdecl _mm_sha256rnds2_epu32(__m128i, __m128i, __m128i);
+#if defined(__cplusplus)
+}
+#endif
+#else
+#include <immintrin.h>
+#endif
+#endif
+
 #if CRYPTOPP_BOOL_X86 || CRYPTOPP_BOOL_X32 || CRYPTOPP_BOOL_X64
 
 #if defined(__cplusplus)
@@ -234,6 +250,7 @@ extern volatile int g_hasCLMUL;
 extern volatile int g_isP4;
 extern volatile int g_hasRDRAND;
 extern volatile int g_hasRDSEED;
+extern volatile int g_hasSHA256;
 extern volatile int g_isIntel;
 extern volatile int g_isAMD;
 extern volatile uint32 g_cacheLineSize;
@@ -262,6 +279,7 @@ void DisableCPUExtendedFeatures ();
 #define IsP4() g_isP4
 #define HasRDRAND() g_hasRDRAND
 #define HasRDSEED() g_hasRDSEED
+#define HasSHA256() g_hasSHA256
 #define IsCpuIntel() g_isIntel
 #define IsCpuAMD() g_isAMD
 #define GetCacheLineSize() g_cacheLineSize