Hi All,

I am using CSNBSPN to convert Encrypted ISO-0 pin block to ISO-2 pin block and encrypt new pin block with internal token (Type SECMSG;SMPIN) to create Encrypted Pin Block to send it in Pin Change EMV Script.

I populated the below fields for CSNBSPN.
rule_array - TDES-CBC;SELFENC
input_PIN_block - ISO-0 pin block encrypted using pin encryption keys
PIN_encrypting_key_identifier - DES IPINENC key
input_PIN_profile - ISO-0    NONE     F
input_PAN_data - 12 right most digit excluding check digit
secmsg_key_identifier - DES key with control vector key type SECMSG with SMPIN
output_PIN_profile - ISO-2    NONE     
output_PAN_data - ignored

CSNBPSN has the following fields and Direction mentioned as Input. But not sure what values to passed to the below fields.
textLength
Clear_text
PIN_offset
PIN_offset_field_length

Please help.

I think CSNBSPN call does the below.
1. Decrypt the input_PIN_block using PIN_encrypting_key_identifier and place the output in Clear_text
2. Convert Pin Block ISO-0 to Pin Block ISO-2 in Clear_text
3. Encrypt the newly ISO-2 pin block in Clear_text using secmsg_key_identifier and return the result in enciphered_text.

Please correct me if I am Wrong.

Thanks,
Sudharsan

------------------------------
Sudharsan Srikanthan
------------------------------

Hi Sudharsan,
textLength - Length of Clear_text (min len 8, max 4096; multiple of 8)
Clear_text - any value, the output PIN_block will be placed within the clear_text
PIN_offset - the offset within the clear text where the output PIN block will be placed. The PIN_offset plus PIN_offset_field_length must be less than or equal to the clear_text_length
PIN_offset_field_length - must be 8

Processing:
Deciphers the input PIN block
Reformats the PIN block when the input and output PIN-block formats differ
Self-encrypts the output PIN block as specified
Places the PIN block within the supplied text at the specified offset
Encrypts the updated text.
Returns the enciphered text

Hope that helps,
Sheri DeGroodt

------------------------------
Sheri DeGroodt
------------------------------

Original Message:
Sent: Thu June 24, 2021 02:11 AM
From: Sudharsan Srikanthan
Subject: Need help with ICSF CSNBSPN

Hi All,

I am using CSNBSPN to convert Encrypted ISO-0 pin block to ISO-2 pin block and encrypt new pin block with internal token (Type SECMSG;SMPIN) to create Encrypted Pin Block to send it in Pin Change EMV Script.

I populated the below fields for CSNBSPN.
rule_array - TDES-CBC;SELFENC
input_PIN_block - ISO-0 pin block encrypted using pin encryption keys
PIN_encrypting_key_identifier - DES IPINENC key
input_PIN_profile - ISO-0    NONE     F
input_PAN_data - 12 right most digit excluding check digit
secmsg_key_identifier - DES key with control vector key type SECMSG with SMPIN
output_PIN_profile - ISO-2    NONE     
output_PAN_data - ignored

CSNBPSN has the following fields and Direction mentioned as Input. But not sure what values to passed to the below fields.
textLength
Clear_text
PIN_offset
PIN_offset_field_length

Please help.

I think CSNBSPN call does the below.
1. Decrypt the input_PIN_block using PIN_encrypting_key_identifier and place the output in Clear_text
2. Convert Pin Block ISO-0 to Pin Block ISO-2 in Clear_text
3. Encrypt the newly ISO-2 pin block in Clear_text using secmsg_key_identifier and return the result in enciphered_text.

Please correct me if I am Wrong.

Thanks,
Sudharsan

------------------------------
Sudharsan Srikanthan
------------------------------

Hi Sheri,

Thanks a lot for the Reply. Now I understood the use of textLengh, ClearText, PIN_offset and PIN_offset_field_length.
If want to add any more text with pin block to be enciphered then use ClearText and PIN_offset.

If I use CLEARPIN instead of SELFENC in rule array, will the processing be like below. 
Deciphers the input PIN block
Reformats the PIN block when the input and output PIN-block formats differ
Places the output PIN block within the supplied text at the specified offset
Encrypts the updated text.
Returns the enciphered text

Thanks,
Sudharsan

------------------------------
Sudharsan Srikanthan
------------------------------

Original Message:
Sent: Fri June 25, 2021 09:38 AM
From: Sheri DeGroodt
Subject: Need help with ICSF CSNBSPN

Hi Sudharsan,
textLength - Length of Clear_text (min len 8, max 4096; multiple of 8)
Clear_text - any value, the output PIN_block will be placed within the clear_text
PIN_offset - the offset within the clear text where the output PIN block will be placed. The PIN_offset plus PIN_offset_field_length must be less than or equal to the clear_text_length
PIN_offset_field_length - must be 8

Processing:
Deciphers the input PIN block
Reformats the PIN block when the input and output PIN-block formats differ
Self-encrypts the output PIN block as specified
Places the PIN block within the supplied text at the specified offset
Encrypts the updated text.
Returns the enciphered text

Hope that helps,
Sheri DeGroodt

------------------------------
Sheri DeGroodt

Original Message:
Sent: Thu June 24, 2021 02:11 AM
From: Sudharsan Srikanthan
Subject: Need help with ICSF CSNBSPN

Hi All,

I am using CSNBSPN to convert Encrypted ISO-0 pin block to ISO-2 pin block and encrypt new pin block with internal token (Type SECMSG;SMPIN) to create Encrypted Pin Block to send it in Pin Change EMV Script.

I populated the below fields for CSNBSPN.
rule_array - TDES-CBC;SELFENC
input_PIN_block - ISO-0 pin block encrypted using pin encryption keys
PIN_encrypting_key_identifier - DES IPINENC key
input_PIN_profile - ISO-0    NONE     F
input_PAN_data - 12 right most digit excluding check digit
secmsg_key_identifier - DES key with control vector key type SECMSG with SMPIN
output_PIN_profile - ISO-2    NONE     
output_PAN_data - ignored

CSNBPSN has the following fields and Direction mentioned as Input. But not sure what values to passed to the below fields.
textLength
Clear_text
PIN_offset
PIN_offset_field_length

Please help.

I think CSNBSPN call does the below.
1. Decrypt the input_PIN_block using PIN_encrypting_key_identifier and place the output in Clear_text
2. Convert Pin Block ISO-0 to Pin Block ISO-2 in Clear_text
3. Encrypt the newly ISO-2 pin block in Clear_text using secmsg_key_identifier and return the result in enciphered_text.

Please correct me if I am Wrong.

Thanks,
Sudharsan

------------------------------
Sudharsan Srikanthan
------------------------------

Hi Sudharsan - Yes, what you have documented is correct.

Sheri DeGroodt

------------------------------
Sheri DeGroodt
------------------------------

Original Message:
Sent: Tue June 29, 2021 04:55 AM
From: Sudharsan Srikanthan
Subject: Need help with ICSF CSNBSPN

Hi Sheri,

Thanks a lot for the Reply. Now I understood the use of textLengh, ClearText, PIN_offset and PIN_offset_field_length.
If want to add any more text with pin block to be enciphered then use ClearText and PIN_offset.

If I use CLEARPIN instead of SELFENC in rule array, will the processing be like below. 
Deciphers the input PIN block
Reformats the PIN block when the input and output PIN-block formats differ
Places the output PIN block within the supplied text at the specified offset
Encrypts the updated text.
Returns the enciphered text

Thanks,
Sudharsan

------------------------------
Sudharsan Srikanthan

Original Message:
Sent: Fri June 25, 2021 09:38 AM
From: Sheri DeGroodt
Subject: Need help with ICSF CSNBSPN

Hi Sudharsan,
textLength - Length of Clear_text (min len 8, max 4096; multiple of 8)
Clear_text - any value, the output PIN_block will be placed within the clear_text
PIN_offset - the offset within the clear text where the output PIN block will be placed. The PIN_offset plus PIN_offset_field_length must be less than or equal to the clear_text_length
PIN_offset_field_length - must be 8

Processing:
Deciphers the input PIN block
Reformats the PIN block when the input and output PIN-block formats differ
Self-encrypts the output PIN block as specified
Places the PIN block within the supplied text at the specified offset
Encrypts the updated text.
Returns the enciphered text

Hope that helps,
Sheri DeGroodt

------------------------------
Sheri DeGroodt

Original Message:
Sent: Thu June 24, 2021 02:11 AM
From: Sudharsan Srikanthan
Subject: Need help with ICSF CSNBSPN

Hi All,

I am using CSNBSPN to convert Encrypted ISO-0 pin block to ISO-2 pin block and encrypt new pin block with internal token (Type SECMSG;SMPIN) to create Encrypted Pin Block to send it in Pin Change EMV Script.

I populated the below fields for CSNBSPN.
rule_array - TDES-CBC;SELFENC
input_PIN_block - ISO-0 pin block encrypted using pin encryption keys
PIN_encrypting_key_identifier - DES IPINENC key
input_PIN_profile - ISO-0    NONE     F
input_PAN_data - 12 right most digit excluding check digit
secmsg_key_identifier - DES key with control vector key type SECMSG with SMPIN
output_PIN_profile - ISO-2    NONE     
output_PAN_data - ignored

CSNBPSN has the following fields and Direction mentioned as Input. But not sure what values to passed to the below fields.
textLength
Clear_text
PIN_offset
PIN_offset_field_length

Please help.

I think CSNBSPN call does the below.
1. Decrypt the input_PIN_block using PIN_encrypting_key_identifier and place the output in Clear_text
2. Convert Pin Block ISO-0 to Pin Block ISO-2 in Clear_text
3. Encrypt the newly ISO-2 pin block in Clear_text using secmsg_key_identifier and return the result in enciphered_text.

Please correct me if I am Wrong.

Thanks,
Sudharsan

------------------------------
Sudharsan Srikanthan
------------------------------

Hi Sheri,

------------------------------
Sudharsan Srikanthan
------------------------------

Original Message:
Sent: Tue June 29, 2021 03:34 PM
From: Sheri DeGroodt
Subject: Need help with ICSF CSNBSPN

Hi Sudharsan - Yes, what you have documented is correct.

Sheri DeGroodt

------------------------------
Sheri DeGroodt

Original Message:
Sent: Tue June 29, 2021 04:55 AM
From: Sudharsan Srikanthan
Subject: Need help with ICSF CSNBSPN

Hi Sheri,

Thanks a lot for the Reply. Now I understood the use of textLengh, ClearText, PIN_offset and PIN_offset_field_length.
If want to add any more text with pin block to be enciphered then use ClearText and PIN_offset.

If I use CLEARPIN instead of SELFENC in rule array, will the processing be like below. 
Deciphers the input PIN block
Reformats the PIN block when the input and output PIN-block formats differ
Places the output PIN block within the supplied text at the specified offset
Encrypts the updated text.
Returns the enciphered text

Thanks,
Sudharsan

------------------------------
Sudharsan Srikanthan

Original Message:
Sent: Fri June 25, 2021 09:38 AM
From: Sheri DeGroodt
Subject: Need help with ICSF CSNBSPN

Hi Sudharsan,
textLength - Length of Clear_text (min len 8, max 4096; multiple of 8)
Clear_text - any value, the output PIN_block will be placed within the clear_text
PIN_offset - the offset within the clear text where the output PIN block will be placed. The PIN_offset plus PIN_offset_field_length must be less than or equal to the clear_text_length
PIN_offset_field_length - must be 8

Processing:
Deciphers the input PIN block
Reformats the PIN block when the input and output PIN-block formats differ
Self-encrypts the output PIN block as specified
Places the PIN block within the supplied text at the specified offset
Encrypts the updated text.
Returns the enciphered text

Hope that helps,
Sheri DeGroodt

------------------------------
Sheri DeGroodt

Original Message:
Sent: Thu June 24, 2021 02:11 AM
From: Sudharsan Srikanthan
Subject: Need help with ICSF CSNBSPN

Hi All,

I am using CSNBSPN to convert Encrypted ISO-0 pin block to ISO-2 pin block and encrypt new pin block with internal token (Type SECMSG;SMPIN) to create Encrypted Pin Block to send it in Pin Change EMV Script.

I populated the below fields for CSNBSPN.
rule_array - TDES-CBC;SELFENC
input_PIN_block - ISO-0 pin block encrypted using pin encryption keys
PIN_encrypting_key_identifier - DES IPINENC key
input_PIN_profile - ISO-0    NONE     F
input_PAN_data - 12 right most digit excluding check digit
secmsg_key_identifier - DES key with control vector key type SECMSG with SMPIN
output_PIN_profile - ISO-2    NONE     
output_PAN_data - ignored

CSNBPSN has the following fields and Direction mentioned as Input. But not sure what values to passed to the below fields.
textLength
Clear_text
PIN_offset
PIN_offset_field_length

Please help.

I think CSNBSPN call does the below.
1. Decrypt the input_PIN_block using PIN_encrypting_key_identifier and place the output in Clear_text
2. Convert Pin Block ISO-0 to Pin Block ISO-2 in Clear_text
3. Encrypt the newly ISO-2 pin block in Clear_text using secmsg_key_identifier and return the result in enciphered_text.

Please correct me if I am Wrong.

Thanks,
Sudharsan

------------------------------
Sudharsan Srikanthan
------------------------------