v3 3-S-1 and 3-S-3 not deterministic

[conradludgate]

Hi.

Not an issue per-se, but I noticed the change to the v3 vectors in 32d7406 and I updated my code to produce low-S signatures accordingly. I noticed that while I was able to validate these signatures in the test vectors, the signatures my code produced were not identical.

Could you confirm if these signatures are using a deterministic ECDSA standard?

For completeness, here are the test vectors my code passes with:

{
  "name": "PASETO v3 Test Vectors",
  "tests": [
    {
      "name": "3-S-1",
      "expect-fail": false,
      "public-key": "02fbcb7c69ee1c60579be7a334134878d9c5c5bf35d552dab63c0140397ed14cef637d7720925c44699ea30e72874c72fb",
      "secret-key": "20347609607477aca8fbfbc5e6218455f3199669792ef8b466faa87bdc67798144c848dd03661eed5ac62461340cea96",
      "secret-key-pem": "-----BEGIN EC PRIVATE KEY-----\nMIGkAgEBBDAgNHYJYHR3rKj7+8XmIYRV8xmWaXku+LRm+qh73Gd5gUTISN0DZh7t\nWsYkYTQM6pagBwYFK4EEACKhZANiAAT7y3xp7hxgV5vnozQTSHjZxcW/NdVS2rY8\nAUA5ftFM72N9dyCSXERpnqMOcodMcvt8kgcrB8KcKee0HU23E79/s4CvEs8hBfnj\nSUd/gcAm08EjSIz06iWjrNy4NakxR3I=\n-----END EC PRIVATE KEY-----",
      "public-key-pem": "-----BEGIN PUBLIC KEY-----\nMHYwEAYHKoZIzj0CAQYFK4EEACIDYgAE+8t8ae4cYFeb56M0E0h42cXFvzXVUtq2\nPAFAOX7RTO9jfXcgklxEaZ6jDnKHTHL7fJIHKwfCnCnntB1NtxO/f7OArxLPIQX5\n40lHf4HAJtPBI0iM9Oolo6zcuDWpMUdy\n-----END PUBLIC KEY-----",
-     "token": "v3.public.eyJkYXRhIjoidGhpcyBpcyBhIHNpZ25lZCBtZXNzYWdlIiwiZXhwIjoiMjAyMi0wMS0wMVQwMDowMDowMCswMDowMCJ9vrarT0tBPumLsUh5iJGDDH7sIkPk1fW8Ej6R2j-8jB7rkkCJyEKxcMNPJ5jLurPvZSzRdLb-Ia_Y2YXavY77xbLzJQJkA_zjJeYrd8mWQ24oOpkts1Css3Xa74cz_j3A",
+     "token": "v3.public.eyJkYXRhIjoidGhpcyBpcyBhIHNpZ25lZCBtZXNzYWdlIiwiZXhwIjoiMjAyMi0wMS0wMVQwMDowMDowMCswMDowMCJ9qqEwwrKHKi5lJ7b9MBKc0G4MGZy0ptUiMv3lAUAaz-JY_zjoqBSIxMxhfAoeNYiSNQgr7UcEF1xwpZKxhyY-wbsthTWhto85XytcCWlRUCrs3ct_Wd23Tuq_0i-1My8S",
      "payload": "{\"data\":\"this is a signed message\",\"exp\":\"2022-01-01T00:00:00+00:00\"}",
      "footer": "",
      "implicit-assertion": ""
    },
    {
      "name": "3-S-3",
      "expect-fail": false,
      "public-key": "02fbcb7c69ee1c60579be7a334134878d9c5c5bf35d552dab63c0140397ed14cef637d7720925c44699ea30e72874c72fb",
      "secret-key": "20347609607477aca8fbfbc5e6218455f3199669792ef8b466faa87bdc67798144c848dd03661eed5ac62461340cea96",
      "secret-key-pem": "-----BEGIN EC PRIVATE KEY-----\nMIGkAgEBBDAgNHYJYHR3rKj7+8XmIYRV8xmWaXku+LRm+qh73Gd5gUTISN0DZh7t\nWsYkYTQM6pagBwYFK4EEACKhZANiAAT7y3xp7hxgV5vnozQTSHjZxcW/NdVS2rY8\nAUA5ftFM72N9dyCSXERpnqMOcodMcvt8kgcrB8KcKee0HU23E79/s4CvEs8hBfnj\nSUd/gcAm08EjSIz06iWjrNy4NakxR3I=\n-----END EC PRIVATE KEY-----",
      "public-key-pem": "-----BEGIN PUBLIC KEY-----\nMHYwEAYHKoZIzj0CAQYFK4EEACIDYgAE+8t8ae4cYFeb56M0E0h42cXFvzXVUtq2\nPAFAOX7RTO9jfXcgklxEaZ6jDnKHTHL7fJIHKwfCnCnntB1NtxO/f7OArxLPIQX5\n40lHf4HAJtPBI0iM9Oolo6zcuDWpMUdy\n-----END PUBLIC KEY-----",
-     "token": "v3.public.eyJkYXRhIjoidGhpcyBpcyBhIHNpZ25lZCBtZXNzYWdlIiwiZXhwIjoiMjAyMi0wMS0wMVQwMDowMDowMCswMDowMCJ9FrkqK6FaB39LisqmPmIHLnu5P8zBTdO_EyWqeworXkGMBChHk-ZZWPt2r7qSYpOqWmvf0oBgf9Elx1TKS4a3YKIcaYddPlu6B9w5LT_b76sCqdVDjE5bH8ZgvZ708c48.eyJraWQiOiJkWWtJU3lseFFlZWNFY0hFTGZ6Rjg4VVpyd2JMb2xOaUNkcHpVSEd3OVVxbiJ9",
+     "token": "v3.public.eyJkYXRhIjoidGhpcyBpcyBhIHNpZ25lZCBtZXNzYWdlIiwiZXhwIjoiMjAyMi0wMS0wMVQwMDowMDowMCswMDowMCJ94SjWIbjmS7715GjLSnHnpJrC9Z-cnwK45dmvnVvCRQDCCKAXaKEopTajX0DKYx1XVUFfjsigVTj09_kd-HhxpCcaSBXyVi5DeSg1b8Wcl174ytw9OzjHe15_AxELCuhc.eyJraWQiOiJkWWtJU3lseFFlZWNFY0hFTGZ6Rjg4VVpyd2JMb2xOaUNkcHpVSEd3OVVxbiJ9",
      "payload": "{\"data\":\"this is a signed message\",\"exp\":\"2022-01-01T00:00:00+00:00\"}",
      "footer": "{\"kid\":\"dYkISylxQeecEcHELfzF88UZrwbLolNiCdpzUHGw9Uqn\"}",
      "implicit-assertion": "{\"test-vector\":\"3-S-3\"}"
    }
  ]
}