Comments (1)
Hi, one way to figure out curve parameters is by using OpenSSL, like this:
$ openssl ecparam -name secp256r1 -text -param_enc explicit
using curve name prime256v1 instead of secp256r1
Field Type: prime-field
Prime:
00:ff:ff:ff:ff:00:00:00:01:00:00:00:00:00:00:
00:00:00:00:00:00:ff:ff:ff:ff:ff:ff:ff:ff:ff:
ff:ff:ff
A:
00:ff:ff:ff:ff:00:00:00:01:00:00:00:00:00:00:
00:00:00:00:00:00:ff:ff:ff:ff:ff:ff:ff:ff:ff:
ff:ff:fc
B:
5a:c6:35:d8:aa:3a:93:e7:b3:eb:bd:55:76:98:86:
bc:65:1d:06:b0:cc:53:b0:f6:3b:ce:3c:3e:27:d2:
60:4b
Generator (uncompressed):
04:6b:17:d1:f2:e1:2c:42:47:f8:bc:e6:e5:63:a4:
40:f2:77:03:7d:81:2d:eb:33:a0:f4:a1:39:45:d8:
98:c2:96:4f:e3:42:e2:fe:1a:7f:9b:8e:e7:eb:4a:
7c:0f:9e:16:2b:ce:33:57:6b:31:5e:ce:cb:b6:40:
68:37:bf:51:f5
Order:
00:ff:ff:ff:ff:00:00:00:00:ff:ff:ff:ff:ff:ff:
ff:ff:bc:e6:fa:ad:a7:17:9e:84:f3:b9:ca:c2:fc:
63:25:51
Cofactor: 1 (0x1)
Seed:
c4:9d:36:08:86:e7:04:93:6a:66:78:e1:13:9d:26:
b7:81:9f:7e:90
(Note that your curve is secp256r1, with a 1 instead of an L as the last character.)
If your curve is not supported by OpenSSL, then the web is your friend :)
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