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author | Howaner <franzi.moos@googlemail.com> | 2014-05-07 12:54:58 +0200 |
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committer | Howaner <franzi.moos@googlemail.com> | 2014-05-07 12:54:58 +0200 |
commit | f5fe3682201e2f1356e3a5c408eb8296b542e072 (patch) | |
tree | 208ec7a760b9e909fbb43e1a12ee43d866cb9df7 /src/PolarSSL++/Sha1Checksum.cpp | |
parent | Remove old import (diff) | |
parent | Fixed wires powering wires diagonally below them (diff) | |
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Diffstat (limited to '')
-rw-r--r-- | src/PolarSSL++/Sha1Checksum.cpp | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/src/PolarSSL++/Sha1Checksum.cpp b/src/PolarSSL++/Sha1Checksum.cpp new file mode 100644 index 000000000..a1ee9d7b9 --- /dev/null +++ b/src/PolarSSL++/Sha1Checksum.cpp @@ -0,0 +1,138 @@ + +// Sha1Checksum.cpp + +// Declares the cSha1Checksum class representing the SHA-1 checksum calculator + +#include "Globals.h" +#include "Sha1Checksum.h" + + + + + +/* +// Self-test the hash formatting for known values: +// sha1(Notch) : 4ed1f46bbe04bc756bcb17c0c7ce3e4632f06a48 +// sha1(jeb_) : -7c9d5b0044c130109a5d7b5fb5c317c02b4e28c1 +// sha1(simon) : 88e16a1019277b15d58faf0541e11910eb756f6 + +static class Test +{ +public: + Test(void) + { + AString DigestNotch, DigestJeb, DigestSimon; + Byte Digest[20]; + cSha1Checksum Checksum; + Checksum.Update((const Byte *)"Notch", 5); + Checksum.Finalize(Digest); + cSha1Checksum::DigestToJava(Digest, DigestNotch); + Checksum.Restart(); + Checksum.Update((const Byte *)"jeb_", 4); + Checksum.Finalize(Digest); + cSha1Checksum::DigestToJava(Digest, DigestJeb); + Checksum.Restart(); + Checksum.Update((const Byte *)"simon", 5); + Checksum.Finalize(Digest); + cSha1Checksum::DigestToJava(Digest, DigestSimon); + printf("Notch: \"%s\"\n", DigestNotch.c_str()); + printf("jeb_: \"%s\"\n", DigestJeb.c_str()); + printf("simon: \"%s\"\n", DigestSimon.c_str()); + assert(DigestNotch == "4ed1f46bbe04bc756bcb17c0c7ce3e4632f06a48"); + assert(DigestJeb == "-7c9d5b0044c130109a5d7b5fb5c317c02b4e28c1"); + assert(DigestSimon == "88e16a1019277b15d58faf0541e11910eb756f6"); + } +} test; +*/ + + + + + + +/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// +// cSha1Checksum: + +cSha1Checksum::cSha1Checksum(void) : + m_DoesAcceptInput(true) +{ + sha1_starts(&m_Sha1); +} + + + + + +void cSha1Checksum::Update(const Byte * a_Data, size_t a_Length) +{ + ASSERT(m_DoesAcceptInput); // Not Finalize()-d yet, or Restart()-ed + + sha1_update(&m_Sha1, a_Data, a_Length); +} + + + + + +void cSha1Checksum::Finalize(cSha1Checksum::Checksum & a_Output) +{ + ASSERT(m_DoesAcceptInput); // Not Finalize()-d yet, or Restart()-ed + + sha1_finish(&m_Sha1, a_Output); + m_DoesAcceptInput = false; +} + + + + + +void cSha1Checksum::DigestToJava(const Checksum & a_Digest, AString & a_Out) +{ + Checksum Digest; + memcpy(Digest, a_Digest, sizeof(Digest)); + + bool IsNegative = (Digest[0] >= 0x80); + if (IsNegative) + { + // Two's complement: + bool carry = true; // Add one to the whole number + for (int i = 19; i >= 0; i--) + { + Digest[i] = ~Digest[i]; + if (carry) + { + carry = (Digest[i] == 0xff); + Digest[i]++; + } + } + } + a_Out.clear(); + a_Out.reserve(40); + for (int i = 0; i < 20; i++) + { + AppendPrintf(a_Out, "%02x", Digest[i]); + } + while ((a_Out.length() > 0) && (a_Out[0] == '0')) + { + a_Out.erase(0, 1); + } + if (IsNegative) + { + a_Out.insert(0, "-"); + } +} + + + + + + +void cSha1Checksum::Restart(void) +{ + sha1_starts(&m_Sha1); + m_DoesAcceptInput = true; +} + + + + |