The issue on ECDSA

[TheYangCode]

I think the parameters used by SGX should be：

GX = 0x6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296;
GY = 0x4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5;
AA = 0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC;
BB = 0x5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B;
PP = 0xFFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF;
NN = 0xFFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551;

Through the sgx_ecc256_create_key_pairfunction, the key I obtained is:

sk:
abc284b60e61f2ced65603c41641922ada1caffb891b1bc4e93cfe0ba597537e
pk.gx:
5560b6f697cfafb011e80d2ad18cb1a2c4a9d556029c4b1035f2adfcec95ab3a
pk.gy:
76e1c5d3ff46376ae9dcdc95faffaef8aec488d230ef8d92c4d2738c3e4fd87c

After converting to little-endian:

sk:
7e5397a50bfe3ce9c41b1b89fbaf1cda2a924116c40356d6cef2610eb684c2ab
pk.gx:
3aab95ecfcadf235104b9c0256d5a9c4a2b18cd12a0de811b0afcf97f6b66055
pk.gy:
7cd84f3e8c73d2c4928def30d288c4aef8aefffa95dcdce96a3746ffd3c5e176

However, When I calculate the public key using functions other than those in SGX.I am unable to calculate with the value
7e5397a50bfe3ce9c41b1b89fbaf1cda2a924116c40356d6cef2610eb684c2ab：

pk.gx:
3aab95ecfcadf235104b9c0256d5a9c4a2b18cd12a0de811b0afcf97f6b66055
pk.gy:
7cd84f3e8c73d2c4928def30d288c4aef8aefffa95dcdce96a3746ffd3c5e176

In this way, I am unable to further verify the signature. I am a beginner, please help me.Is it a problem with endianness conversion?

[ShundaZhang]

Yes, you should not convert you data to little endian when calculating.
The equation public key = private key * G only holds for the big-endian data you listed. If you must store them in little-endian format, please convert them back when performing calculations. Otherwise, the equation will not hold.

That is to say: 0xabc284b60e61f2ced65603c41641922ada1caffb891b1bc4e93cfe0ba597537e * (0x6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296, 0x4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5) == (0x5560b6f697cfafb011e80d2ad18cb1a2c4a9d556029c4b1035f2adfcec95ab3a, 0x76e1c5d3ff46376ae9dcdc95faffaef8aec488d230ef8d92c4d2738c3e4fd87c)

but
0x7e5397a50bfe3ce9c41b1b89fbaf1cda2a924116c40356d6cef2610eb684c2ab * (0x6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296, 0x4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5) != (0x3aab95ecfcadf235104b9c0256d5a9c4a2b18cd12a0de811b0afcf97f6b66055, 0x7cd84f3e8c73d2c4928def30d288c4aef8aefffa95dcdce96a3746ffd3c5e176)

Here * means Multiplication on elliptic curves.