CAPLfunctionSecurityLocalSignEcdsa

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SecurityLocalSignEcdsa

CAPL Functions » Security » SecurityLocalSignEcdsa

Valid for: CANoe DE • CANoe4SW DE

Function Syntax

SecurityLocalSignEcdsa(dword curve, dword hashAlgorithm, dword signatureFormat, byte privateKey[], dword privateKeyLength, byte data[], dword dataLength, byte signature[], dword* signatureLength)

Description

Generates the signature of the data with a given private key using the ECDSA signature algorithm. The curve, hash algorithm and the signature format can be selected via the parameters.

Parameters

• dword curve: ID of the curve to use.

  • Available curves:
    • brainpool256r1 = 1
    • brainpool384r1 = 2
    • brainpool512r1 = 3
    • secp256r1 = 4
    • secp384r1 = 5
    • secp521r1 = 6

• dword hashAlgorithm: ID of the hash algorithm to use.

  • Available hash algorithm:
    • SHA-256 = 1
    • SHA-384 = 2
    • SHA-512 = 3

• dword signatureFormat: ID of the signature format to use.

  • Available signature formats:
    • IEEE1363 = 0
    • DER sequence = 1

• byte privateKey[]: Private key to be used for signing.

  • The following formats are accepted:
    • raw key bytes
    • DER
    • PEM

• dword privateKeyLength: Length of private key to be used for signing.

• byte data[]: Data to be used for signing.

• dword dataLength: Length of data to be used for signing.

• byte signature[] [OUT]: Generated signature.

• dword signatureLength [IN/OUT]: Length of generated signature.

Return Values

• 1: Success
  A Value of 1 means that the action was successful.

• ≤ 0: Error
  A value less than or equal to 0 means error.

Example

dword curve = 1; // brainpool256r1
dword hashAlgorithm = 1; // SHA-256
dword signatureFormat = 1; // DER sequence
byte privateKey[138] = 0x30,0x81,0x87,0x02,0x01,0x00,0x30,0x13,0x06,0x07,0x2a,0x86,0x48,0xce,0x3d,0x02,0x01,0x06,0x08,0x2a,0x86,0x48,0xce,0x3d,0x03,0x01,0x07,0x04,0x6d,0x30,0x6b,0x02,0x01,0x01,0x04,0x20,0x86,0xd6,0x1d,0x9e,0x43,0xfa,0x81,0xf9,0x46,0xad,0xac,0xf2,0x1b,0x14,0x60,0xb9,0xc8,0xb4,0xe6,0x5e,0x99,0x77,0xc7,0x13,0x9d,0x20,0x6c,0x46,0xb3,0x09,0xc8,0xb3,0xa1,0x44,0x03,0x42,0x00,0x04,0xd5,0xc1,0x3a,0xba,0xff,0x54,0x6b,0x36,0xd6,0x61,0x14,0x18,0x42,0x6e,0x55,0xb1,0x8d,0x34,0x71,0xfb,0x58,0xc5,0x36,0x04,0x11,0x91,0xed,0xa7,0x5b,0x45,0xd1,0xfb,0x1d,0xd6,0xa0,0x42,0xae,0x91,0x6b,0x70,0x6d,0x8f,0x9e,0x13,0x7b,0x6e,0xdf,0x5b,0x42,0x3c,0x13,0x02,0x06,0x13,0xb7,0x62,0x0a,0xf6,0x8b,0x7f,0xc8,0x45,0x9f,0x33;
dword privateKeySize = elcount(privateKey);
byte data[3] = {0x11, 0x11, 0x11};
dword dataSize = elcount(data);
byte signature[1000];
dword signatureSize = elcount(signature);
long result;
result = SecurityLocalSignEcdsa(curve, hashAlgorithm, signatureFormat, privateKey, privateKeySize, data, dataSize, signature, signatureSize);

SecurityLocalVerifyEd25519