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Merge pull request #884 from isislovecruft/feature/scalar-succeed-fast
Optimisation to succeed fast when checking signature scalar is reduced.
master
Frank Denis
5 years ago
committed by
GitHub
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with
5 additions and
2 deletions
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src/libsodium/crypto_sign/ed25519/ref10/open.c
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@ -28,8 +28,11 @@ _crypto_sign_ed25519_verify_detached(const unsigned char *sig, |
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return -1; |
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} |
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#else |
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if (sc25519_is_canonical(sig + 32) == 0 || |
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ge25519_has_small_order(sig) != 0) { |
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if (sig[63] & 240 && |
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sc25519_is_canonical(sig + 32) == 0) { |
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return -1; |
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} |
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if (ge25519_has_small_order(sig) != 0) { |
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return -1; |
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} |
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if (ge25519_is_canonical(pk) == 0 || |
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