Connection Test Case

Connection Test Case

Testing code of the following steps in dart

Client Private Key

modulus of public key and private key (Base64)

jjxTpOaEQO4SlZQAGYlMHIEJvz6mDWQlxUW7uMOiSe2Dg60wu8I3pnQ0HDHYTQ35rP2i80WmEbaScTVz-oITO7Lh0470_epOtuwDWezEomdP2dheiGI4jageiJ0ratZ0VqQi63thfGOaBGpG15-TUaDNRUSyB8JQlGWJrojS5lIcVsnkq129mgBOFJCUzLWBp0fwbFBve1T3cYLrPoLQgIQPINiMnokw-iRjp-C9o8cqbh1WBBQOeSxg97AD4L-0mO6NgzhXZ_jjwaJG10e9BHQkvatwU-PFivnasH_fXbyXJqs-plWCQY462Ook2xer_94gCVT8gFubBalBjluw3Q

privateExponent of private key (Base64)

eBMZkdZAxAe3jKrawrQTmuScc-TRjfCDqlxKM5qEQODP67Ojtn4pOM5Ux5CUx8gKhS3CCJk9rypvyj6T4GE7F2TWHCFNVaYeOXJZCetFvMx2rrNoar5we7X3wODeLF1K7XG3QRBxpe73sM5_a7x9Q6X6ZIWvvbkfCYgGiV9cm65nps4UTTmBnnh6GXcDFx9uPD5uPeMowtZh-bHzFfEYCj9dBaPfa9mQhHtqFODH8TpTOCDB8iPsJpl7loFmQQZzTRq6qr1UfPzRmfhJi_b_zdj8r5_gUEL8593StiXMIcPYlTnmUPRZtWjpFrlu3H4xEIMkPzowLqhp8KKotFGSCQ

publicExponent of public key (const value)

65537 (0x10001)

Initialize connection , Client -> Server

dsId: client's dsId , last 43 chars are the base64 of public key modulus

test-pTrfpbVWb3NNAhMIXr_FpmV3oObtMVxPcNu2mDksp0M

client publicKey modulus(base64)

jjxTpOaEQO4SlZQAGYlMHIEJvz6mDWQlxUW7uMOiSe2Dg60wu8I3pnQ0HDHYTQ35rP2i80WmEbaScTVz-oITO7Lh0470_epOtuwDWezEomdP2dheiGI4jageiJ0ratZ0VqQi63thfGOaBGpG15-TUaDNRUSyB8JQlGWJrojS5lIcVsnkq129mgBOFJCUzLWBp0fwbFBve1T3cYLrPoLQgIQPINiMnokw-iRjp-C9o8cqbh1WBBQOeSxg97AD4L-0mO6NgzhXZ_jjwaJG10e9BHQkvatwU-PFivnasH_fXbyXJqs-plWCQY462Ook2xer_94gCVT8gFubBalBjluw3Q

Initialize connection , Server -> Client

encryptedNonce (Base64)

YM2x5wEChxriLalS8tD5l2hlV6MUU-MmqbUNyDz5dUl1x8sNt7cBdh0MLc7mSb8Ohx-Q2_tW-i9fA0WQNFdWIdDZfNziUF4snFtZjez77eOSXFns4j51ZMdGXeWGRrlF5F1pGtIorFfMaofbD-QjX-VIe-TD-6QJDHVL9larXxVS2lnxY5YDhS1niHY-MXCBVUMPt9b9OOz87GTUlTu1mZJbq004mU_Du81D8j7aRNbaSIKmYWPJpoqW00yNXkADQZmVL8xVxyEApMrDF9VQMo1cNle5Tyxtvn79fF7zNE6On0JDaRg0ozP_fjV2-V_afr-OkStIWh5K_zBHfH1Xyg

• server generates the encrypted nonce with following steps
  1. server generate 128 bits (16 bytes) random nonce data
  • nonce = Hexd26538aabf9a97bcfd8bc0dd1a727c92
  1. server generate a big number A < modulus, with the last 16 bytes same as the nonce
  • in this test case all the other bytes are just 0
  • A = Hexd26538aabf9a97bcfd8bc0dd1a727c92
  1. server encrypt A with client's public key
  • E = A.modPow(65537, modulus)
  1. encryptedNonce = base64(E)

salt, a random string

"0x100"

Start Connection (http or ws), Client -> Server

dsId: client's dsId

dsAuth: client's proof of public key owner

MRxHkgT_dEszsB3kWe3HSu1Z8V1c1Z_uTvxP66-Nx0Y

• client calculates the dsAuth with following steps
  • Base64 decode encryptedNonce into big integer E
  • calculate A = E.modPow(privateExponent, modulus)
  • nonce data = last 16 bytes of A (if A is less than 16 bytes, add 0 in the front)
  • encode the salt into utf8, UTF8("0x100") = Hex3078313030
  • concat salt and nonce bytes: H = salt+nonce = Hex3078313030d26538aabf9a97bcfd8bc0dd1a727c92
  • auth = base64(sha256(H))

Start connection, Server validate Client

server has A, salt and nonce already, use same algorithm to check if dsAuth value is same