summaryrefslogtreecommitdiff
path: root/library/sha256.c
diff options
context:
space:
mode:
Diffstat (limited to 'library/sha256.c')
-rw-r--r--library/sha256.c976
1 files changed, 976 insertions, 0 deletions
diff --git a/library/sha256.c b/library/sha256.c
new file mode 100644
index 00000000000..87889817a4e
--- /dev/null
+++ b/library/sha256.c
@@ -0,0 +1,976 @@
+/*
+ * FIPS-180-2 compliant SHA-256 implementation
+ *
+ * Copyright The Mbed TLS Contributors
+ * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+/*
+ * The SHA-256 Secure Hash Standard was published by NIST in 2002.
+ *
+ * http://csrc.nist.gov/publications/fips/fips180-2/fips180-2.pdf
+ */
+
+#if defined(__clang__) && (__clang_major__ >= 4)
+
+/* Ideally, we would simply use MBEDTLS_ARCH_IS_ARMV8_A in the following #if,
+ * but that is defined by build_info.h, and we need this block to happen first. */
+#if defined(__ARM_ARCH) && (__ARM_ARCH_PROFILE == 'A')
+#if __ARM_ARCH >= 8
+#define MBEDTLS_SHA256_ARCH_IS_ARMV8_A
+#endif
+#endif
+
+#if defined(MBEDTLS_SHA256_ARCH_IS_ARMV8_A) && !defined(__ARM_FEATURE_CRYPTO)
+/* TODO: Re-consider above after https://reviews.llvm.org/D131064 merged.
+ *
+ * The intrinsic declaration are guarded by predefined ACLE macros in clang:
+ * these are normally only enabled by the -march option on the command line.
+ * By defining the macros ourselves we gain access to those declarations without
+ * requiring -march on the command line.
+ *
+ * `arm_neon.h` is included by common.h, so we put these defines
+ * at the top of this file, before any includes.
+ */
+#define __ARM_FEATURE_CRYPTO 1
+/* See: https://arm-software.github.io/acle/main/acle.html#cryptographic-extensions
+ *
+ * `__ARM_FEATURE_CRYPTO` is deprecated, but we need to continue to specify it
+ * for older compilers.
+ */
+#define __ARM_FEATURE_SHA2 1
+#define MBEDTLS_ENABLE_ARM_CRYPTO_EXTENSIONS_COMPILER_FLAG
+#endif
+
+#endif /* defined(__clang__) && (__clang_major__ >= 4) */
+
+/* Ensure that SIG_SETMASK is defined when -std=c99 is used. */
+#define _GNU_SOURCE
+
+#include "common.h"
+
+#if defined(MBEDTLS_SHA256_C) || defined(MBEDTLS_SHA224_C)
+
+#include "mbedtls/sha256.h"
+#include "mbedtls/platform_util.h"
+#include "mbedtls/error.h"
+
+#include <string.h>
+
+#include "mbedtls/platform.h"
+
+#if defined(MBEDTLS_ARCH_IS_ARMV8_A)
+
+# if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT) || \
+ defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_ONLY)
+# if !defined(MBEDTLS_HAVE_NEON_INTRINSICS)
+# if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT)
+# warning "Target does not support NEON instructions"
+# undef MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT
+# else
+# error "Target does not support NEON instructions"
+# endif
+# endif
+# endif
+
+# if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT) || \
+ defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_ONLY)
+/* *INDENT-OFF* */
+
+# if !defined(__ARM_FEATURE_CRYPTO) || defined(MBEDTLS_ENABLE_ARM_CRYPTO_EXTENSIONS_COMPILER_FLAG)
+# if defined(__ARMCOMPILER_VERSION)
+# if __ARMCOMPILER_VERSION <= 6090000
+# error "Must use minimum -march=armv8-a+crypto for MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_*"
+# endif
+# pragma clang attribute push (__attribute__((target("sha2"))), apply_to=function)
+# define MBEDTLS_POP_TARGET_PRAGMA
+# elif defined(__clang__)
+# if __clang_major__ < 4
+# error "A more recent Clang is required for MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_*"
+# endif
+# pragma clang attribute push (__attribute__((target("crypto"))), apply_to=function)
+# define MBEDTLS_POP_TARGET_PRAGMA
+# elif defined(__GNUC__)
+ /* FIXME: GCC 5 claims to support Armv8 Crypto Extensions, but some
+ * intrinsics are missing. Missing intrinsics could be worked around.
+ */
+# if __GNUC__ < 6
+# error "A more recent GCC is required for MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_*"
+# else
+# pragma GCC push_options
+# pragma GCC target ("arch=armv8-a+crypto")
+# define MBEDTLS_POP_TARGET_PRAGMA
+# endif
+# else
+# error "Only GCC and Clang supported for MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_*"
+# endif
+# endif
+/* *INDENT-ON* */
+
+# endif
+# if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT)
+# if defined(__unix__)
+# if defined(__linux__)
+/* Our preferred method of detection is getauxval() */
+# include <sys/auxv.h>
+/* These are not always defined via sys/auxv.h */
+# if !defined(HWCAP_SHA2)
+# define HWCAP_SHA2 (1 << 6)
+# endif
+# if !defined(HWCAP2_SHA2)
+# define HWCAP2_SHA2 (1 << 3)
+# endif
+# endif
+/* Use SIGILL on Unix, and fall back to it on Linux */
+# include <signal.h>
+# endif
+# endif
+#elif !defined(MBEDTLS_PLATFORM_IS_WINDOWS_ON_ARM64)
+# undef MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_ONLY
+# undef MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT
+#endif
+
+#if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT)
+/*
+ * Capability detection code comes early, so we can disable
+ * MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT if no detection mechanism found
+ */
+#if defined(MBEDTLS_ARCH_IS_ARM64) && defined(HWCAP_SHA2)
+static int mbedtls_a64_crypto_sha256_determine_support(void)
+{
+ return (getauxval(AT_HWCAP) & HWCAP_SHA2) ? 1 : 0;
+}
+#elif defined(MBEDTLS_ARCH_IS_ARM32) && defined(HWCAP2_SHA2)
+static int mbedtls_a64_crypto_sha256_determine_support(void)
+{
+ return (getauxval(AT_HWCAP2) & HWCAP2_SHA2) ? 1 : 0;
+}
+#elif defined(__APPLE__)
+static int mbedtls_a64_crypto_sha256_determine_support(void)
+{
+ return 1;
+}
+#elif defined(MBEDTLS_PLATFORM_IS_WINDOWS_ON_ARM64)
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
+#include <processthreadsapi.h>
+
+static int mbedtls_a64_crypto_sha256_determine_support(void)
+{
+ return IsProcessorFeaturePresent(PF_ARM_V8_CRYPTO_INSTRUCTIONS_AVAILABLE) ?
+ 1 : 0;
+}
+#elif defined(__unix__) && defined(SIG_SETMASK)
+/* Detection with SIGILL, setjmp() and longjmp() */
+#include <signal.h>
+#include <setjmp.h>
+
+static jmp_buf return_from_sigill;
+
+/*
+ * Armv8-A SHA256 support detection via SIGILL
+ */
+static void sigill_handler(int signal)
+{
+ (void) signal;
+ longjmp(return_from_sigill, 1);
+}
+
+static int mbedtls_a64_crypto_sha256_determine_support(void)
+{
+ struct sigaction old_action, new_action;
+
+ sigset_t old_mask;
+ if (sigprocmask(0, NULL, &old_mask)) {
+ return 0;
+ }
+
+ sigemptyset(&new_action.sa_mask);
+ new_action.sa_flags = 0;
+ new_action.sa_handler = sigill_handler;
+
+ sigaction(SIGILL, &new_action, &old_action);
+
+ static int ret = 0;
+
+ if (setjmp(return_from_sigill) == 0) { /* First return only */
+ /* If this traps, we will return a second time from setjmp() with 1 */
+#if defined(MBEDTLS_ARCH_IS_ARM64)
+ asm volatile ("sha256h q0, q0, v0.4s" : : : "v0");
+#else
+ asm volatile ("sha256h.32 q0, q0, q0" : : : "q0");
+#endif
+ ret = 1;
+ }
+
+ sigaction(SIGILL, &old_action, NULL);
+ sigprocmask(SIG_SETMASK, &old_mask, NULL);
+
+ return ret;
+}
+#else
+#warning "No mechanism to detect ARMV8_CRYPTO found, using C code only"
+#undef MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT
+#endif /* HWCAP_SHA2, __APPLE__, __unix__ && SIG_SETMASK */
+
+#endif /* MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT */
+
+#if !defined(MBEDTLS_SHA256_ALT)
+
+#define SHA256_BLOCK_SIZE 64
+
+void mbedtls_sha256_init(mbedtls_sha256_context *ctx)
+{
+ memset(ctx, 0, sizeof(mbedtls_sha256_context));
+}
+
+void mbedtls_sha256_free(mbedtls_sha256_context *ctx)
+{
+ if (ctx == NULL) {
+ return;
+ }
+
+ mbedtls_platform_zeroize(ctx, sizeof(mbedtls_sha256_context));
+}
+
+void mbedtls_sha256_clone(mbedtls_sha256_context *dst,
+ const mbedtls_sha256_context *src)
+{
+ *dst = *src;
+}
+
+/*
+ * SHA-256 context setup
+ */
+int mbedtls_sha256_starts(mbedtls_sha256_context *ctx, int is224)
+{
+#if defined(MBEDTLS_SHA224_C) && defined(MBEDTLS_SHA256_C)
+ if (is224 != 0 && is224 != 1) {
+ return MBEDTLS_ERR_SHA256_BAD_INPUT_DATA;
+ }
+#elif defined(MBEDTLS_SHA256_C)
+ if (is224 != 0) {
+ return MBEDTLS_ERR_SHA256_BAD_INPUT_DATA;
+ }
+#else /* defined MBEDTLS_SHA224_C only */
+ if (is224 == 0) {
+ return MBEDTLS_ERR_SHA256_BAD_INPUT_DATA;
+ }
+#endif
+
+ ctx->total[0] = 0;
+ ctx->total[1] = 0;
+
+ if (is224 == 0) {
+#if defined(MBEDTLS_SHA256_C)
+ ctx->state[0] = 0x6A09E667;
+ ctx->state[1] = 0xBB67AE85;
+ ctx->state[2] = 0x3C6EF372;
+ ctx->state[3] = 0xA54FF53A;
+ ctx->state[4] = 0x510E527F;
+ ctx->state[5] = 0x9B05688C;
+ ctx->state[6] = 0x1F83D9AB;
+ ctx->state[7] = 0x5BE0CD19;
+#endif
+ } else {
+#if defined(MBEDTLS_SHA224_C)
+ ctx->state[0] = 0xC1059ED8;
+ ctx->state[1] = 0x367CD507;
+ ctx->state[2] = 0x3070DD17;
+ ctx->state[3] = 0xF70E5939;
+ ctx->state[4] = 0xFFC00B31;
+ ctx->state[5] = 0x68581511;
+ ctx->state[6] = 0x64F98FA7;
+ ctx->state[7] = 0xBEFA4FA4;
+#endif
+ }
+
+#if defined(MBEDTLS_SHA224_C)
+ ctx->is224 = is224;
+#endif
+
+ return 0;
+}
+
+#if !defined(MBEDTLS_SHA256_PROCESS_ALT)
+static const uint32_t K[] =
+{
+ 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,
+};
+
+#endif
+
+#if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT) || \
+ defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_ONLY)
+
+#if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_ONLY)
+# define mbedtls_internal_sha256_process_many_a64_crypto mbedtls_internal_sha256_process_many
+# define mbedtls_internal_sha256_process_a64_crypto mbedtls_internal_sha256_process
+#endif
+
+static size_t mbedtls_internal_sha256_process_many_a64_crypto(
+ mbedtls_sha256_context *ctx, const uint8_t *msg, size_t len)
+{
+ uint32x4_t abcd = vld1q_u32(&ctx->state[0]);
+ uint32x4_t efgh = vld1q_u32(&ctx->state[4]);
+
+ size_t processed = 0;
+
+ for (;
+ len >= SHA256_BLOCK_SIZE;
+ processed += SHA256_BLOCK_SIZE,
+ msg += SHA256_BLOCK_SIZE,
+ len -= SHA256_BLOCK_SIZE) {
+ uint32x4_t tmp, abcd_prev;
+
+ uint32x4_t abcd_orig = abcd;
+ uint32x4_t efgh_orig = efgh;
+
+ uint32x4_t sched0 = vreinterpretq_u32_u8(vld1q_u8(msg + 16 * 0));
+ uint32x4_t sched1 = vreinterpretq_u32_u8(vld1q_u8(msg + 16 * 1));
+ uint32x4_t sched2 = vreinterpretq_u32_u8(vld1q_u8(msg + 16 * 2));
+ uint32x4_t sched3 = vreinterpretq_u32_u8(vld1q_u8(msg + 16 * 3));
+
+#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ /* Will be true if not defined */
+ /* Untested on BE */
+ sched0 = vreinterpretq_u32_u8(vrev32q_u8(vreinterpretq_u8_u32(sched0)));
+ sched1 = vreinterpretq_u32_u8(vrev32q_u8(vreinterpretq_u8_u32(sched1)));
+ sched2 = vreinterpretq_u32_u8(vrev32q_u8(vreinterpretq_u8_u32(sched2)));
+ sched3 = vreinterpretq_u32_u8(vrev32q_u8(vreinterpretq_u8_u32(sched3)));
+#endif
+
+ /* Rounds 0 to 3 */
+ tmp = vaddq_u32(sched0, vld1q_u32(&K[0]));
+ abcd_prev = abcd;
+ abcd = vsha256hq_u32(abcd_prev, efgh, tmp);
+ efgh = vsha256h2q_u32(efgh, abcd_prev, tmp);
+
+ /* Rounds 4 to 7 */
+ tmp = vaddq_u32(sched1, vld1q_u32(&K[4]));
+ abcd_prev = abcd;
+ abcd = vsha256hq_u32(abcd_prev, efgh, tmp);
+ efgh = vsha256h2q_u32(efgh, abcd_prev, tmp);
+
+ /* Rounds 8 to 11 */
+ tmp = vaddq_u32(sched2, vld1q_u32(&K[8]));
+ abcd_prev = abcd;
+ abcd = vsha256hq_u32(abcd_prev, efgh, tmp);
+ efgh = vsha256h2q_u32(efgh, abcd_prev, tmp);
+
+ /* Rounds 12 to 15 */
+ tmp = vaddq_u32(sched3, vld1q_u32(&K[12]));
+ abcd_prev = abcd;
+ abcd = vsha256hq_u32(abcd_prev, efgh, tmp);
+ efgh = vsha256h2q_u32(efgh, abcd_prev, tmp);
+
+ for (int t = 16; t < 64; t += 16) {
+ /* Rounds t to t + 3 */
+ sched0 = vsha256su1q_u32(vsha256su0q_u32(sched0, sched1), sched2, sched3);
+ tmp = vaddq_u32(sched0, vld1q_u32(&K[t]));
+ abcd_prev = abcd;
+ abcd = vsha256hq_u32(abcd_prev, efgh, tmp);
+ efgh = vsha256h2q_u32(efgh, abcd_prev, tmp);
+
+ /* Rounds t + 4 to t + 7 */
+ sched1 = vsha256su1q_u32(vsha256su0q_u32(sched1, sched2), sched3, sched0);
+ tmp = vaddq_u32(sched1, vld1q_u32(&K[t + 4]));
+ abcd_prev = abcd;
+ abcd = vsha256hq_u32(abcd_prev, efgh, tmp);
+ efgh = vsha256h2q_u32(efgh, abcd_prev, tmp);
+
+ /* Rounds t + 8 to t + 11 */
+ sched2 = vsha256su1q_u32(vsha256su0q_u32(sched2, sched3), sched0, sched1);
+ tmp = vaddq_u32(sched2, vld1q_u32(&K[t + 8]));
+ abcd_prev = abcd;
+ abcd = vsha256hq_u32(abcd_prev, efgh, tmp);
+ efgh = vsha256h2q_u32(efgh, abcd_prev, tmp);
+
+ /* Rounds t + 12 to t + 15 */
+ sched3 = vsha256su1q_u32(vsha256su0q_u32(sched3, sched0), sched1, sched2);
+ tmp = vaddq_u32(sched3, vld1q_u32(&K[t + 12]));
+ abcd_prev = abcd;
+ abcd = vsha256hq_u32(abcd_prev, efgh, tmp);
+ efgh = vsha256h2q_u32(efgh, abcd_prev, tmp);
+ }
+
+ abcd = vaddq_u32(abcd, abcd_orig);
+ efgh = vaddq_u32(efgh, efgh_orig);
+ }
+
+ vst1q_u32(&ctx->state[0], abcd);
+ vst1q_u32(&ctx->state[4], efgh);
+
+ return processed;
+}
+
+#if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT)
+/*
+ * This function is for internal use only if we are building both C and Armv8-A
+ * versions, otherwise it is renamed to be the public mbedtls_internal_sha256_process()
+ */
+static
+#endif
+int mbedtls_internal_sha256_process_a64_crypto(mbedtls_sha256_context *ctx,
+ const unsigned char data[SHA256_BLOCK_SIZE])
+{
+ return (mbedtls_internal_sha256_process_many_a64_crypto(ctx, data,
+ SHA256_BLOCK_SIZE) ==
+ SHA256_BLOCK_SIZE) ? 0 : -1;
+}
+
+#endif /* MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT || MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_ONLY */
+
+#if defined(MBEDTLS_POP_TARGET_PRAGMA)
+#if defined(__clang__)
+#pragma clang attribute pop
+#elif defined(__GNUC__)
+#pragma GCC pop_options
+#endif
+#undef MBEDTLS_POP_TARGET_PRAGMA
+#endif
+
+#if !defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT)
+#define mbedtls_internal_sha256_process_many_c mbedtls_internal_sha256_process_many
+#define mbedtls_internal_sha256_process_c mbedtls_internal_sha256_process
+#endif
+
+
+#if !defined(MBEDTLS_SHA256_PROCESS_ALT) && \
+ !defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_ONLY)
+
+#define SHR(x, n) (((x) & 0xFFFFFFFF) >> (n))
+#define ROTR(x, n) (SHR(x, n) | ((x) << (32 - (n))))
+
+#define S0(x) (ROTR(x, 7) ^ ROTR(x, 18) ^ SHR(x, 3))
+#define S1(x) (ROTR(x, 17) ^ ROTR(x, 19) ^ SHR(x, 10))
+
+#define S2(x) (ROTR(x, 2) ^ ROTR(x, 13) ^ ROTR(x, 22))
+#define S3(x) (ROTR(x, 6) ^ ROTR(x, 11) ^ ROTR(x, 25))
+
+#define F0(x, y, z) (((x) & (y)) | ((z) & ((x) | (y))))
+#define F1(x, y, z) ((z) ^ ((x) & ((y) ^ (z))))
+
+#define R(t) \
+ ( \
+ local.W[t] = S1(local.W[(t) - 2]) + local.W[(t) - 7] + \
+ S0(local.W[(t) - 15]) + local.W[(t) - 16] \
+ )
+
+#define P(a, b, c, d, e, f, g, h, x, K) \
+ do \
+ { \
+ local.temp1 = (h) + S3(e) + F1((e), (f), (g)) + (K) + (x); \
+ local.temp2 = S2(a) + F0((a), (b), (c)); \
+ (d) += local.temp1; (h) = local.temp1 + local.temp2; \
+ } while (0)
+
+#if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT)
+/*
+ * This function is for internal use only if we are building both C and Armv8
+ * versions, otherwise it is renamed to be the public mbedtls_internal_sha256_process()
+ */
+static
+#endif
+int mbedtls_internal_sha256_process_c(mbedtls_sha256_context *ctx,
+ const unsigned char data[SHA256_BLOCK_SIZE])
+{
+ struct {
+ uint32_t temp1, temp2, W[64];
+ uint32_t A[8];
+ } local;
+
+ unsigned int i;
+
+ for (i = 0; i < 8; i++) {
+ local.A[i] = ctx->state[i];
+ }
+
+#if defined(MBEDTLS_SHA256_SMALLER)
+ for (i = 0; i < 64; i++) {
+ if (i < 16) {
+ local.W[i] = MBEDTLS_GET_UINT32_BE(data, 4 * i);
+ } else {
+ R(i);
+ }
+
+ P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
+ local.A[5], local.A[6], local.A[7], local.W[i], K[i]);
+
+ local.temp1 = local.A[7]; local.A[7] = local.A[6];
+ local.A[6] = local.A[5]; local.A[5] = local.A[4];
+ local.A[4] = local.A[3]; local.A[3] = local.A[2];
+ local.A[2] = local.A[1]; local.A[1] = local.A[0];
+ local.A[0] = local.temp1;
+ }
+#else /* MBEDTLS_SHA256_SMALLER */
+ for (i = 0; i < 16; i++) {
+ local.W[i] = MBEDTLS_GET_UINT32_BE(data, 4 * i);
+ }
+
+ for (i = 0; i < 16; i += 8) {
+ P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
+ local.A[5], local.A[6], local.A[7], local.W[i+0], K[i+0]);
+ P(local.A[7], local.A[0], local.A[1], local.A[2], local.A[3],
+ local.A[4], local.A[5], local.A[6], local.W[i+1], K[i+1]);
+ P(local.A[6], local.A[7], local.A[0], local.A[1], local.A[2],
+ local.A[3], local.A[4], local.A[5], local.W[i+2], K[i+2]);
+ P(local.A[5], local.A[6], local.A[7], local.A[0], local.A[1],
+ local.A[2], local.A[3], local.A[4], local.W[i+3], K[i+3]);
+ P(local.A[4], local.A[5], local.A[6], local.A[7], local.A[0],
+ local.A[1], local.A[2], local.A[3], local.W[i+4], K[i+4]);
+ P(local.A[3], local.A[4], local.A[5], local.A[6], local.A[7],
+ local.A[0], local.A[1], local.A[2], local.W[i+5], K[i+5]);
+ P(local.A[2], local.A[3], local.A[4], local.A[5], local.A[6],
+ local.A[7], local.A[0], local.A[1], local.W[i+6], K[i+6]);
+ P(local.A[1], local.A[2], local.A[3], local.A[4], local.A[5],
+ local.A[6], local.A[7], local.A[0], local.W[i+7], K[i+7]);
+ }
+
+ for (i = 16; i < 64; i += 8) {
+ P(local.A[0], local.A[1], local.A[2], local.A[3], local.A[4],
+ local.A[5], local.A[6], local.A[7], R(i+0), K[i+0]);
+ P(local.A[7], local.A[0], local.A[1], local.A[2], local.A[3],
+ local.A[4], local.A[5], local.A[6], R(i+1), K[i+1]);
+ P(local.A[6], local.A[7], local.A[0], local.A[1], local.A[2],
+ local.A[3], local.A[4], local.A[5], R(i+2), K[i+2]);
+ P(local.A[5], local.A[6], local.A[7], local.A[0], local.A[1],
+ local.A[2], local.A[3], local.A[4], R(i+3), K[i+3]);
+ P(local.A[4], local.A[5], local.A[6], local.A[7], local.A[0],
+ local.A[1], local.A[2], local.A[3], R(i+4), K[i+4]);
+ P(local.A[3], local.A[4], local.A[5], local.A[6], local.A[7],
+ local.A[0], local.A[1], local.A[2], R(i+5), K[i+5]);
+ P(local.A[2], local.A[3], local.A[4], local.A[5], local.A[6],
+ local.A[7], local.A[0], local.A[1], R(i+6), K[i+6]);
+ P(local.A[1], local.A[2], local.A[3], local.A[4], local.A[5],
+ local.A[6], local.A[7], local.A[0], R(i+7), K[i+7]);
+ }
+#endif /* MBEDTLS_SHA256_SMALLER */
+
+ for (i = 0; i < 8; i++) {
+ ctx->state[i] += local.A[i];
+ }
+
+ /* Zeroise buffers and variables to clear sensitive data from memory. */
+ mbedtls_platform_zeroize(&local, sizeof(local));
+
+ return 0;
+}
+
+#endif /* !MBEDTLS_SHA256_PROCESS_ALT && !MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_ONLY */
+
+
+#if !defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_ONLY)
+
+static size_t mbedtls_internal_sha256_process_many_c(
+ mbedtls_sha256_context *ctx, const uint8_t *data, size_t len)
+{
+ size_t processed = 0;
+
+ while (len >= SHA256_BLOCK_SIZE) {
+ if (mbedtls_internal_sha256_process_c(ctx, data) != 0) {
+ return 0;
+ }
+
+ data += SHA256_BLOCK_SIZE;
+ len -= SHA256_BLOCK_SIZE;
+
+ processed += SHA256_BLOCK_SIZE;
+ }
+
+ return processed;
+}
+
+#endif /* !MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_ONLY */
+
+
+#if defined(MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT)
+
+static int mbedtls_a64_crypto_sha256_has_support(void)
+{
+ static int done = 0;
+ static int supported = 0;
+
+ if (!done) {
+ supported = mbedtls_a64_crypto_sha256_determine_support();
+ done = 1;
+ }
+
+ return supported;
+}
+
+static size_t mbedtls_internal_sha256_process_many(mbedtls_sha256_context *ctx,
+ const uint8_t *msg, size_t len)
+{
+ if (mbedtls_a64_crypto_sha256_has_support()) {
+ return mbedtls_internal_sha256_process_many_a64_crypto(ctx, msg, len);
+ } else {
+ return mbedtls_internal_sha256_process_many_c(ctx, msg, len);
+ }
+}
+
+int mbedtls_internal_sha256_process(mbedtls_sha256_context *ctx,
+ const unsigned char data[SHA256_BLOCK_SIZE])
+{
+ if (mbedtls_a64_crypto_sha256_has_support()) {
+ return mbedtls_internal_sha256_process_a64_crypto(ctx, data);
+ } else {
+ return mbedtls_internal_sha256_process_c(ctx, data);
+ }
+}
+
+#endif /* MBEDTLS_SHA256_USE_ARMV8_A_CRYPTO_IF_PRESENT */
+
+
+/*
+ * SHA-256 process buffer
+ */
+int mbedtls_sha256_update(mbedtls_sha256_context *ctx,
+ const unsigned char *input,
+ size_t ilen)
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ size_t fill;
+ uint32_t left;
+
+ if (ilen == 0) {
+ return 0;
+ }
+
+ left = ctx->total[0] & 0x3F;
+ fill = SHA256_BLOCK_SIZE - left;
+
+ ctx->total[0] += (uint32_t) ilen;
+ ctx->total[0] &= 0xFFFFFFFF;
+
+ if (ctx->total[0] < (uint32_t) ilen) {
+ ctx->total[1]++;
+ }
+
+ if (left && ilen >= fill) {
+ memcpy((void *) (ctx->buffer + left), input, fill);
+
+ if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0) {
+ return ret;
+ }
+
+ input += fill;
+ ilen -= fill;
+ left = 0;
+ }
+
+ while (ilen >= SHA256_BLOCK_SIZE) {
+ size_t processed =
+ mbedtls_internal_sha256_process_many(ctx, input, ilen);
+ if (processed < SHA256_BLOCK_SIZE) {
+ return MBEDTLS_ERR_ERROR_GENERIC_ERROR;
+ }
+
+ input += processed;
+ ilen -= processed;
+ }
+
+ if (ilen > 0) {
+ memcpy((void *) (ctx->buffer + left), input, ilen);
+ }
+
+ return 0;
+}
+
+/*
+ * SHA-256 final digest
+ */
+int mbedtls_sha256_finish(mbedtls_sha256_context *ctx,
+ unsigned char *output)
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ uint32_t used;
+ uint32_t high, low;
+ int truncated = 0;
+
+ /*
+ * Add padding: 0x80 then 0x00 until 8 bytes remain for the length
+ */
+ used = ctx->total[0] & 0x3F;
+
+ ctx->buffer[used++] = 0x80;
+
+ if (used <= 56) {
+ /* Enough room for padding + length in current block */
+ memset(ctx->buffer + used, 0, 56 - used);
+ } else {
+ /* We'll need an extra block */
+ memset(ctx->buffer + used, 0, SHA256_BLOCK_SIZE - used);
+
+ if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0) {
+ goto exit;
+ }
+
+ memset(ctx->buffer, 0, 56);
+ }
+
+ /*
+ * Add message length
+ */
+ high = (ctx->total[0] >> 29)
+ | (ctx->total[1] << 3);
+ low = (ctx->total[0] << 3);
+
+ MBEDTLS_PUT_UINT32_BE(high, ctx->buffer, 56);
+ MBEDTLS_PUT_UINT32_BE(low, ctx->buffer, 60);
+
+ if ((ret = mbedtls_internal_sha256_process(ctx, ctx->buffer)) != 0) {
+ goto exit;
+ }
+
+ /*
+ * Output final state
+ */
+ MBEDTLS_PUT_UINT32_BE(ctx->state[0], output, 0);
+ MBEDTLS_PUT_UINT32_BE(ctx->state[1], output, 4);
+ MBEDTLS_PUT_UINT32_BE(ctx->state[2], output, 8);
+ MBEDTLS_PUT_UINT32_BE(ctx->state[3], output, 12);
+ MBEDTLS_PUT_UINT32_BE(ctx->state[4], output, 16);
+ MBEDTLS_PUT_UINT32_BE(ctx->state[5], output, 20);
+ MBEDTLS_PUT_UINT32_BE(ctx->state[6], output, 24);
+
+#if defined(MBEDTLS_SHA224_C)
+ truncated = ctx->is224;
+#endif
+ if (!truncated) {
+ MBEDTLS_PUT_UINT32_BE(ctx->state[7], output, 28);
+ }
+
+ ret = 0;
+
+exit:
+ mbedtls_sha256_free(ctx);
+ return ret;
+}
+
+#endif /* !MBEDTLS_SHA256_ALT */
+
+/*
+ * output = SHA-256( input buffer )
+ */
+int mbedtls_sha256(const unsigned char *input,
+ size_t ilen,
+ unsigned char *output,
+ int is224)
+{
+ int ret = MBEDTLS_ERR_ERROR_CORRUPTION_DETECTED;
+ mbedtls_sha256_context ctx;
+
+#if defined(MBEDTLS_SHA224_C) && defined(MBEDTLS_SHA256_C)
+ if (is224 != 0 && is224 != 1) {
+ return MBEDTLS_ERR_SHA256_BAD_INPUT_DATA;
+ }
+#elif defined(MBEDTLS_SHA256_C)
+ if (is224 != 0) {
+ return MBEDTLS_ERR_SHA256_BAD_INPUT_DATA;
+ }
+#else /* defined MBEDTLS_SHA224_C only */
+ if (is224 == 0) {
+ return MBEDTLS_ERR_SHA256_BAD_INPUT_DATA;
+ }
+#endif
+
+ mbedtls_sha256_init(&ctx);
+
+ if ((ret = mbedtls_sha256_starts(&ctx, is224)) != 0) {
+ goto exit;
+ }
+
+ if ((ret = mbedtls_sha256_update(&ctx, input, ilen)) != 0) {
+ goto exit;
+ }
+
+ if ((ret = mbedtls_sha256_finish(&ctx, output)) != 0) {
+ goto exit;
+ }
+
+exit:
+ mbedtls_sha256_free(&ctx);
+
+ return ret;
+}
+
+#if defined(MBEDTLS_SELF_TEST)
+/*
+ * FIPS-180-2 test vectors
+ */
+static const unsigned char sha_test_buf[3][57] =
+{
+ { "abc" },
+ { "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq" },
+ { "" }
+};
+
+static const size_t sha_test_buflen[3] =
+{
+ 3, 56, 1000
+};
+
+typedef const unsigned char (sha_test_sum_t)[32];
+
+/*
+ * SHA-224 test vectors
+ */
+#if defined(MBEDTLS_SHA224_C)
+static sha_test_sum_t sha224_test_sum[] =
+{
+ { 0x23, 0x09, 0x7D, 0x22, 0x34, 0x05, 0xD8, 0x22,
+ 0x86, 0x42, 0xA4, 0x77, 0xBD, 0xA2, 0x55, 0xB3,
+ 0x2A, 0xAD, 0xBC, 0xE4, 0xBD, 0xA0, 0xB3, 0xF7,
+ 0xE3, 0x6C, 0x9D, 0xA7 },
+ { 0x75, 0x38, 0x8B, 0x16, 0x51, 0x27, 0x76, 0xCC,
+ 0x5D, 0xBA, 0x5D, 0xA1, 0xFD, 0x89, 0x01, 0x50,
+ 0xB0, 0xC6, 0x45, 0x5C, 0xB4, 0xF5, 0x8B, 0x19,
+ 0x52, 0x52, 0x25, 0x25 },
+ { 0x20, 0x79, 0x46, 0x55, 0x98, 0x0C, 0x91, 0xD8,
+ 0xBB, 0xB4, 0xC1, 0xEA, 0x97, 0x61, 0x8A, 0x4B,
+ 0xF0, 0x3F, 0x42, 0x58, 0x19, 0x48, 0xB2, 0xEE,
+ 0x4E, 0xE7, 0xAD, 0x67 }
+};
+#endif
+
+/*
+ * SHA-256 test vectors
+ */
+#if defined(MBEDTLS_SHA256_C)
+static sha_test_sum_t sha256_test_sum[] =
+{
+ { 0xBA, 0x78, 0x16, 0xBF, 0x8F, 0x01, 0xCF, 0xEA,
+ 0x41, 0x41, 0x40, 0xDE, 0x5D, 0xAE, 0x22, 0x23,
+ 0xB0, 0x03, 0x61, 0xA3, 0x96, 0x17, 0x7A, 0x9C,
+ 0xB4, 0x10, 0xFF, 0x61, 0xF2, 0x00, 0x15, 0xAD },
+ { 0x24, 0x8D, 0x6A, 0x61, 0xD2, 0x06, 0x38, 0xB8,
+ 0xE5, 0xC0, 0x26, 0x93, 0x0C, 0x3E, 0x60, 0x39,
+ 0xA3, 0x3C, 0xE4, 0x59, 0x64, 0xFF, 0x21, 0x67,
+ 0xF6, 0xEC, 0xED, 0xD4, 0x19, 0xDB, 0x06, 0xC1 },
+ { 0xCD, 0xC7, 0x6E, 0x5C, 0x99, 0x14, 0xFB, 0x92,
+ 0x81, 0xA1, 0xC7, 0xE2, 0x84, 0xD7, 0x3E, 0x67,
+ 0xF1, 0x80, 0x9A, 0x48, 0xA4, 0x97, 0x20, 0x0E,
+ 0x04, 0x6D, 0x39, 0xCC, 0xC7, 0x11, 0x2C, 0xD0 }
+};
+#endif
+
+/*
+ * Checkup routine
+ */
+static int mbedtls_sha256_common_self_test(int verbose, int is224)
+{
+ int i, buflen, ret = 0;
+ unsigned char *buf;
+ unsigned char sha256sum[32];
+ mbedtls_sha256_context ctx;
+
+#if defined(MBEDTLS_SHA224_C) && defined(MBEDTLS_SHA256_C)
+ sha_test_sum_t *sha_test_sum = (is224) ? sha224_test_sum : sha256_test_sum;
+#elif defined(MBEDTLS_SHA256_C)
+ sha_test_sum_t *sha_test_sum = sha256_test_sum;
+#else
+ sha_test_sum_t *sha_test_sum = sha224_test_sum;
+#endif
+
+ buf = mbedtls_calloc(1024, sizeof(unsigned char));
+ if (NULL == buf) {
+ if (verbose != 0) {
+ mbedtls_printf("Buffer allocation failed\n");
+ }
+
+ return 1;
+ }
+
+ mbedtls_sha256_init(&ctx);
+
+ for (i = 0; i < 3; i++) {
+ if (verbose != 0) {
+ mbedtls_printf(" SHA-%d test #%d: ", 256 - is224 * 32, i + 1);
+ }
+
+ if ((ret = mbedtls_sha256_starts(&ctx, is224)) != 0) {
+ goto fail;
+ }
+
+ if (i == 2) {
+ memset(buf, 'a', buflen = 1000);
+
+ for (int j = 0; j < 1000; j++) {
+ ret = mbedtls_sha256_update(&ctx, buf, buflen);
+ if (ret != 0) {
+ goto fail;
+ }
+ }
+
+ } else {
+ ret = mbedtls_sha256_update(&ctx, sha_test_buf[i],
+ sha_test_buflen[i]);
+ if (ret != 0) {
+ goto fail;
+ }
+ }
+
+ if ((ret = mbedtls_sha256_finish(&ctx, sha256sum)) != 0) {
+ goto fail;
+ }
+
+
+ if (memcmp(sha256sum, sha_test_sum[i], 32 - is224 * 4) != 0) {
+ ret = 1;
+ goto fail;
+ }
+
+ if (verbose != 0) {
+ mbedtls_printf("passed\n");
+ }
+ }
+
+ if (verbose != 0) {
+ mbedtls_printf("\n");
+ }
+
+ goto exit;
+
+fail:
+ if (verbose != 0) {
+ mbedtls_printf("failed\n");
+ }
+
+exit:
+ mbedtls_sha256_free(&ctx);
+ mbedtls_free(buf);
+
+ return ret;
+}
+
+#if defined(MBEDTLS_SHA256_C)
+int mbedtls_sha256_self_test(int verbose)
+{
+ return mbedtls_sha256_common_self_test(verbose, 0);
+}
+#endif /* MBEDTLS_SHA256_C */
+
+#if defined(MBEDTLS_SHA224_C)
+int mbedtls_sha224_self_test(int verbose)
+{
+ return mbedtls_sha256_common_self_test(verbose, 1);
+}
+#endif /* MBEDTLS_SHA224_C */
+
+#endif /* MBEDTLS_SELF_TEST */
+
+#endif /* MBEDTLS_SHA256_C || MBEDTLS_SHA224_C */
generated by cgit v1.2.3 (git 2.0.4) at 2025-09-20 16:25:49 +0000