diff options
Diffstat (limited to 'src/crypto/chacha20poly1305.cpp')
| -rw-r--r-- | src/crypto/chacha20poly1305.cpp | 9 |
1 files changed, 2 insertions, 7 deletions
diff --git a/src/crypto/chacha20poly1305.cpp b/src/crypto/chacha20poly1305.cpp index 59671d304c..b969bb1a29 100644 --- a/src/crypto/chacha20poly1305.cpp +++ b/src/crypto/chacha20poly1305.cpp @@ -26,10 +26,7 @@ void AEADChaCha20Poly1305::SetKey(Span<const std::byte> key) noexcept namespace { -#ifndef HAVE_TIMINGSAFE_BCMP -#define HAVE_TIMINGSAFE_BCMP - -int timingsafe_bcmp(const unsigned char* b1, const unsigned char* b2, size_t n) noexcept +int timingsafe_bcmp_internal(const unsigned char* b1, const unsigned char* b2, size_t n) noexcept { const unsigned char *p1 = b1, *p2 = b2; int ret = 0; @@ -38,8 +35,6 @@ int timingsafe_bcmp(const unsigned char* b1, const unsigned char* b2, size_t n) return (ret != 0); } -#endif - /** Compute poly1305 tag. chacha20 must be set to the right nonce, block 0. Will be at block 1 after. */ void ComputeTag(ChaCha20& chacha20, Span<const std::byte> aad, Span<const std::byte> cipher, Span<std::byte> tag) noexcept { @@ -93,7 +88,7 @@ bool AEADChaCha20Poly1305::Decrypt(Span<const std::byte> cipher, Span<const std: m_chacha20.Seek(nonce, 0); std::byte expected_tag[EXPANSION]; ComputeTag(m_chacha20, aad, cipher.first(cipher.size() - EXPANSION), expected_tag); - if (timingsafe_bcmp(UCharCast(expected_tag), UCharCast(cipher.last(EXPANSION).data()), EXPANSION)) return false; + if (timingsafe_bcmp_internal(UCharCast(expected_tag), UCharCast(cipher.last(EXPANSION).data()), EXPANSION)) return false; // Decrypt (starting at block 1). m_chacha20.Crypt(cipher.first(plain1.size()), plain1); |