[openssl-users] RSA_PKCS1_OAEP_PADDING

[RudyAC]

Hello Steve,

first of all thanks for helpful advice. When printing out all the fields of
the message with the openssl command
I got for every recipient two blocks. One block includes the OAEP padding
and the other block (same recipient) includes the default padding.

d.ktri: 
        version: <ABSENT>
        d.issuerAndSerialNumber: 
          issuer: C=DE, O=extern, OU=host3, CN=CA - host3
          serialNumber: 12302977334217659119
        keyEncryptionAlgorithm: 
          algorithm: rsaEncryption (1.2.840.113549.1.1.1)
          parameter: NULL

d.ktri: 
        version: <ABSENT>
        d.issuerAndSerialNumber: 
          issuer: C=DE, O=extern, OU=host3, CN=CA - host3
          serialNumber: 12302977334217659119
        keyEncryptionAlgorithm: 
          algorithm: rsaesOaep (1.2.840.113549.1.1.7)
          parameter: SEQUENCE:
    0:d=0  hl=2 l=  43 cons: SEQUENCE          
    2:d=1  hl=2 l=  13 cons:  cont [ 0 ]        
    4:d=2  hl=2 l=  11 cons:   SEQUENCE          
    6:d=3  hl=2 l=   9 prim:    OBJECT            :sha256
   17:d=1  hl=2 l=  26 cons:  cont [ 1 ]        
   19:d=2  hl=2 l=  24 cons:   SEQUENCE          
   21:d=3  hl=2 l=   9 prim:    OBJECT            :mgf1
   32:d=3  hl=2 l=  11 cons:    SEQUENCE          
   34:d=4  hl=2 l=   9 prim:     OBJECT            :sha256

How can I make sure that only the OAEP padding is used?

Regards 
Rudy



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