Search found 3 matches
- Mon Feb 24, 2020 7:42 am
- Forum: Questions & Answers
- Topic: How to implement os2ip and i2osp as per PKCS#1 specification in javacard ?
- Replies: 0
- Views: 18851
How to implement os2ip and i2osp as per PKCS#1 specification in javacard ?
Hello All I need to implement OS2IP and I2OSP as per PKCS#1 specifications but there is one challenge. In java there is one class BigInterger which we can use to perform both arithmetic and modulo arithmetic operations on Big integer values. But how do we implement the same in case of javacard ? Alt...
- Wed Jan 29, 2020 1:55 am
- Forum: Questions & Answers
- Topic: How to implement os2ip and i2osp as per PKCS#1 specification in javacard?
- Replies: 0
- Views: 16277
How to implement os2ip and i2osp as per PKCS#1 specification in javacard?
Hello Friends, I need to perform the following conversions(as per PKCS#1) in javacard: I2OSP converts a nonnegative integer to an octet string of a specified length. I2OSP (x, xLen) Input: x nonnegative integer to be converted xLen intended length of the resulting octet string Output: X correspondin...
- Fri Jan 24, 2020 1:19 am
- Forum: Questions & Answers
- Topic: How to implement os2ip and i2osp as per PKCS#1 specification in javacard ?
- Replies: 0
- Views: 16419
How to implement os2ip and i2osp as per PKCS#1 specification in javacard ?
As i know that it can be implemented in java by using BigInteger and Yes, there is a BigNumber class in javacard which we can use but its limitation is upto 8 bytes.
what about really big numbers like 150-160 digits long ?
How do we implement os2ip and i2osp in case of javacard ?
what about really big numbers like 150-160 digits long ?
How do we implement os2ip and i2osp in case of javacard ?