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Receive full card numbers and CVVs encrypted to your RSA key.
pan field that only your private key can decrypt.
openssl genpkey -algorithm RSA -pkeyopt rsa_keygen_bits:1024 -out card_private.pem
openssl rsa -in card_private.pem -pubout -out card_public.pem
card_public.pem to Set public key:
curl https://cc.nadcab.com/api/v1/account/setPubkey \
-H "Authorization: Bearer $NADCAB_API_KEY" \
--data-urlencode "pubkey@card_public.pem"
card_no, cvv and expire_date, plus the encrypted pan:
{
"code": 200,
"msg": "success",
"data": {
"card_no": "493728******6685",
"cvv": "***",
"expire_date": "**/****",
"pan": "U00tt5dzeV2bK2veQ8U1C+KBE2dCqQdfm3ep106l..."
}
}
pan is Base64 and encrypted with RSA/NONE/OAEPWithSHA1AndMGF1Padding. Decrypt it with your private key:
import { constants, privateDecrypt } from "node:crypto";
import { readFileSync } from "node:fs";
const privateKey = readFileSync("card_private.pem", "utf8");
export function decryptPan(pan) {
return privateDecrypt(
{ key: privateKey, padding: constants.RSA_PKCS1_OAEP_PADDING, oaepHash: "sha1" },
Buffer.from(pan, "base64")
).toString("utf8");
}
import base64
from cryptography.hazmat.primitives import hashes, serialization
from cryptography.hazmat.primitives.asymmetric import padding
with open("card_private.pem", "rb") as f:
private_key = serialization.load_pem_private_key(f.read(), password=None)
def decrypt_pan(pan: str) -> str:
return private_key.decrypt(
base64.b64decode(pan),
padding.OAEP(mgf=padding.MGF1(hashes.SHA1()), algorithm=hashes.SHA1(), label=None),
).decode("utf-8")