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fix: input length for ECCX08.ecSign() is 32 bytes #49

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merged 1 commit into from
Sep 18, 2023
Merged

fix: input length for ECCX08.ecSign() is 32 bytes #49

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10 changes: 4 additions & 6 deletions examples/ECCX08Signing/ECCX08Signing.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,7 @@
is printed to the Serial Monitor. Then the signature is
verified using the public key of the slot.

NOTE: the input data must be 64 bytes in length!
NOTE: the input data must be 32 bytes in length!

Circuit:
- MKR board with ECC508 or ECC608 on board
Expand All @@ -17,11 +17,9 @@

#include <ArduinoECCX08.h>

const byte input[64] = {
const byte input[32] = {
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f
0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f
};

const int slot = 0;
Expand Down Expand Up @@ -57,7 +55,7 @@ void setup() {
Serial.print(" is: ");
printBufferHex(publicKey, sizeof(publicKey));

// calculate the signature, input MUST be 64-byte array
// calculate the signature, input MUST be 32-byte array
byte signature[64];
ECCX08.ecSign(slot, input, signature);

Expand Down