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Right now S will be shorter if the most significant\n byte(s) is zero. Pad it back to the full 32-bytes\n ", "start": 3592, "end": 3833, "loc": { "start": { "line": 113, "column": 8 }, "end": { "line": 117, "column": 10 } } }, { "type": "CommentLine", "value": " SHA512 used in ECIES", "start": 3993, "end": 4016, "loc": { "start": { "line": 123, "column": 8 }, "end": { "line": 123, "column": 31 } } }, { "type": "CommentLine", "value": " /** ECIES (does not always match the Point.fromAffine version above) */", "start": 4054, "end": 4128, "loc": { "start": { "line": 127, "column": 4 }, "end": { "line": 127, "column": 78 } } }, { "type": "CommentLine", "value": " get_shared_secret(public_key){", "start": 4133, "end": 4166, "loc": { "start": { "line": 128, "column": 4 }, "end": { "line": 128, "column": 37 } } }, { "type": "CommentLine", "value": " public_key = toPublic(public_key)", "start": 4171, "end": 4211, "loc": { "start": { "line": 129, "column": 4 }, "end": { "line": 129, "column": 44 } } }, { "type": "CommentLine", "value": " var P = public_key.Q.multiply( this.d );", "start": 4216, "end": 4263, "loc": { "start": { "line": 130, "column": 4 }, "end": { "line": 130, "column": 51 } } }, { "type": "CommentLine", "value": " var S = P.affineX.toBuffer({size: 32});", "start": 4268, "end": 4314, "loc": { "start": { "line": 131, "column": 4 }, "end": { "line": 131, "column": 50 } } }, { "type": "CommentLine", "value": " // ECIES, adds an extra sha512", "start": 4319, "end": 4356, "loc": { "start": { "line": 132, "column": 4 }, "end": { "line": 132, "column": 41 } } }, { "type": "CommentLine", "value": " return sha512(S);", "start": 4361, "end": 4385, "loc": { "start": { "line": 133, "column": 4 }, "end": { "line": 133, "column": 28 } } }, { "type": "CommentLine", "value": " }", "start": 4390, "end": 4394, "loc": { "start": { "line": 134, "column": 4 }, "end": { "line": 134, "column": 8 } } }, { "type": "CommentBlock", "value": "* @throws {Error} - overflow of the key could not be derived ", "start": 4400, "end": 4465, 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