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crypto, crypto/ecies, crypto/secp256k1: libsecp256k1 scalar mult

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thanks to Felix Lange (fjl) for help with design & impl
This commit is contained in:
Gustav Simonsson
2015-09-29 19:37:44 +02:00
parent 27a50c8f4b
commit c8ad64f33c
16 changed files with 321 additions and 171 deletions
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8
crypto/crypto_test.go
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@ -181,7 +181,7 @@ func TestValidateSignatureValues(t *testing.T) {
minusOne := big.NewInt(-1)
one := common.Big1
zero := common.Big0
secp256k1nMinus1 := new(big.Int).Sub(secp256k1n, common.Big1)
secp256k1nMinus1 := new(big.Int).Sub(secp256k1.N, common.Big1)
// correct v,r,s
check(true, 27, one, one)
@ -208,9 +208,9 @@ func TestValidateSignatureValues(t *testing.T) {
// correct sig with max r,s
check(true, 27, secp256k1nMinus1, secp256k1nMinus1)
// correct v, combinations of incorrect r,s at upper limit
check(false, 27, secp256k1n, secp256k1nMinus1)
check(false, 27, secp256k1nMinus1, secp256k1n)
check(false, 27, secp256k1n, secp256k1n)
check(false, 27, secp256k1.N, secp256k1nMinus1)
check(false, 27, secp256k1nMinus1, secp256k1.N)
check(false, 27, secp256k1.N, secp256k1.N)
// current callers ensures r,s cannot be negative, but let's test for that too
// as crypto package could be used stand-alone