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authorPieter Wuille <pieter.wuille@gmail.com>2017-07-16 11:30:27 -0700
committerPieter Wuille <pieter.wuille@gmail.com>2017-07-20 09:03:53 -0700
commitfa9be909c945c3689591590ac19504aa53154c2f (patch)
tree12523dff7750c64cb61aeeee1df438700c72d98b /src/crypto
parentc1ccb15b0e847eb95623f9d25dc522aa02dbdbe8 (diff)
Add selftest for SHA256 transform
Diffstat (limited to 'src/crypto')
-rw-r--r--src/crypto/sha256.cpp34
1 files changed, 33 insertions, 1 deletions
diff --git a/src/crypto/sha256.cpp b/src/crypto/sha256.cpp
index 4ecf509039..25f4eabd4c 100644
--- a/src/crypto/sha256.cpp
+++ b/src/crypto/sha256.cpp
@@ -5,6 +5,7 @@
#include "crypto/sha256.h"
#include "crypto/common.h"
+#include <assert.h>
#include <string.h>
#include <atomic>
@@ -140,7 +141,36 @@ void Transform(uint32_t* s, const unsigned char* chunk, size_t blocks)
} // namespace sha256
-void (*Transform)(uint32_t*, const unsigned char*, size_t) = sha256::Transform;
+typedef void (*TransformType)(uint32_t*, const unsigned char*, size_t);
+
+bool SelfTest(TransformType tr) {
+ static const unsigned char in1[65] = {0, 0x80};
+ static const unsigned char in2[129] = {
+ 0,
+ 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
+ 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32,
+ 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, 2, 0
+ };
+ static const uint32_t init[8] = {0x6a09e667ul, 0xbb67ae85ul, 0x3c6ef372ul, 0xa54ff53aul, 0x510e527ful, 0x9b05688cul, 0x1f83d9abul, 0x5be0cd19ul};
+ static const uint32_t out1[8] = {0xe3b0c442ul, 0x98fc1c14ul, 0x9afbf4c8ul, 0x996fb924ul, 0x27ae41e4ul, 0x649b934cul, 0xa495991bul, 0x7852b855ul};
+ static const uint32_t out2[8] = {0xce4153b0ul, 0x147c2a86ul, 0x3ed4298eul, 0xe0676bc8ul, 0x79fc77a1ul, 0x2abe1f49ul, 0xb2b055dful, 0x1069523eul};
+ uint32_t buf[8];
+ memcpy(buf, init, sizeof(buf));
+ // Process nothing, and check we remain in the initial state.
+ tr(buf, nullptr, 0);
+ if (memcmp(buf, init, sizeof(buf))) return false;
+ // Process the padded empty string (unaligned)
+ tr(buf, in1 + 1, 1);
+ if (memcmp(buf, out1, sizeof(buf))) return false;
+ // Process 64 spaces (unaligned)
+ memcpy(buf, init, sizeof(buf));
+ tr(buf, in2 + 1, 2);
+ if (memcmp(buf, out2, sizeof(buf))) return false;
+ return true;
+}
+
+TransformType Transform = sha256::Transform;
} // namespace
@@ -150,10 +180,12 @@ std::string SHA256AutoDetect()
uint32_t eax, ebx, ecx, edx;
if (__get_cpuid(1, &eax, &ebx, &ecx, &edx) && (ecx >> 19) & 1) {
Transform = sha256_sse4::Transform;
+ assert(SelfTest(Transform));
return "sse4";
}
#endif
+ assert(SelfTest(Transform));
return "standard";
}