CODEWITHSUNDEEP
encryptioncertificateemv
Pramod
Pramod

Reputation: 11

public key certificate decryption in emv

I want to decrypt Public Key Certificate using a CA Public Key, how can i get the output as below.

Recovered Data: 6A02457896FF12170314EF01019001E04E4FC478A42241068E2C9CFDEE9D7450F48F812FA66CEFB8ECBE31DD3C26C3B8A3891B77C1AA2A5A7448B869B7213D36C341E9B71302ADF478F67537032C080186C44034B1801D7644B6EEFAEA566D7336A8C83F42B7992F28BF5EA6B9D14C05870AD4DBD8CDAB8771F65F83D800B353B11E1805C7E4529F261C16A38DE756BC

Data Header: 6A

Data Format: 02

Issuer Identifier: 457896FF

Certificate Expiration Date: 1217

Certificate Serial Number: 0314EF

Hash Algorithm Indicator: 01

Issuer Public Key Algorithm Indicator: 01

Issuer Public Key Length: 90

Issuer Public Key Exponent Length: 01

Issuer Public Key: E04E4FC478A42241068E2C9CFDEE9D7450F48F812FA66CEFB8ECBE31DD3C26C3B8A3891B77C1AA2A5A7448B869B7213D36C341E9B71302ADF478F67537032C080186C44034B1801D7644B6EEFAEA566D7336A8C83F42B7992F28BF5EA6B9D14C05870AD4DBD8CDAB8771F65F

Hash Result: 83D800B353B11E1805C7E4529F261C16A38DE756

Data Trailer: BC

Upvotes: 0

Views: 1643

Answers (1)

Adarsh Nanu
Adarsh Nanu

Reputation: 2211

Download EMVCo Book 2, and read section 5 and 6.

Here you are trying to open an Issuer Public Key Certificate. Issuer Public Key certificate is opened using the Certification Authority Public Key. This key is located using RID and Index. You can find most here

Once CAPK is decided you have to use RSA reversible algorithm as mentioned in Annex B Approved Cryptographic Algorithms B2 Asymmetric Algorithms.

Upvotes: 1

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