CRYPTOSYS PKI PUBLIC AND PRIVATE KEY FILE FORMATS 

Indirectly  +---------------+                       +----------------------+
-supported  | MYCERTCH.P7C  |                       |      MYPKSC12.PFX    |
Formats:    +-+---+---------+                       +--+-------+-----+-----+
              |   |                                    |       |     |
              v   ^                                    v       ^     v
              |   |                                    |       |     |
              |  CMS_MakeSigData                       |       | RSA_GetPrivateKeyFromPFX
    X509_GetCert  |  +<----X_509_GetCertFromPFX--------+       |     |
     FromP7Chain  |  |                                 PFX_MakeFile  |
              |   |  |  +------------------------------------->+     |
              |   |  |  |       +<----RSA_MakeKeys----->+      |     |
              |   |  |  |       |                       |      |     |
              v   ^  v  ^       v                       v      ^     v
              |   |  |  |       |                       |      |     |
Directly-  +--+---+--+--+--+ +--+-------------------+ +-+------+-----+--------+ +-------------------------+
supported  |  MYCERT.CER   | |     PUBKEY.DAT       | |     ENCPRIKEY.DAT     | |      PRIKEY.DAT         |
Formats:   +-+-+-----------+ +--+--+-------------+--+ +-+-------------------+-+ +-+---------------------+-+
             | |                |  |             |      |                   |     |                     |
             v ^                v  v             ^      v                   ^     v                     ^
             | |                |  |             |      |                   |     |                     |
             | +<-X509_MakeCert-+  |             |      |                   |     |                     |
             |                RSA_ReadPublicKey  |    RSA_ReadEncPrivateKey |   RSA_ReadPrivateKeyInfo  |
     RSA_GetPublicKeyFromCert      | RSA_SavePublicKey  |  RSA_SaveEncPrivateKey  |  RSA_SavePrivateKeyInfo
             |                     |             |      |                   |     |                     |
             v                     v             ^      v                   ^     v                     ^
             |                     |             |      |                   |     |                     |
Internal   +-+---------------------+-------------+--+ +-+-------------------+-----+---------------------+-+
Key        |       INTERNAL_PUBLIC_KEY_STRING       | |            INTERNAL_PRIVATE_KEY_STRING            |
Formats:   +-----------+--------------+-------------+ +-----------+--------------+------------------------+
                       ^              v                           ^              v
                       |              |                           |              |
               RSA_FromXMLString      |                   RSA_FromXMLString      |
                       |        RSA_ToXMLString                   |        RSA_ToXMLString
                       |              |                           |              |
                       ^              v                           ^              v
                       |              |                           |              |
XML                  +-+--------------+--+                      +-+--------------+--+
Formats:             |  RSAKEYVALUE.XML  |                      |   RSAKEYPAIR.XML  |
                     +-------------------+                      +-------------------+

FILE FORMATS:-
MYCERT.CER      = Single X.509 certificate file in either DER-encoded or PEM format.
MYCERTCH.P7C    = PKCS#7 certificate chain file.
MYPKCS12.PFX    = PKCS#12/PFX file containing pkcs8-shroudedKeyBag and/or unencrypted pkcs12-certBag.
PUBKEY.DAT      = Either PKCS#1 RSAPublicKey or X.509 SubjectPublicKeyInfo in BER or PEM format.
ENCPRIKEY.DAT   = PKCS#8 EncryptedPrivateKeyInfo in BER or PEM format.
PRIKEY.DAT      = Either PKCS#1 RSAPrivateKey or PKCS#8 PrivateKeyInfo in BER or PEM format.
RSAKEYVALUE.XML = XMLDSIG RSAKeyValue in XML format.
RSAKEYPAIR.XML  = XKMS2 RSAKeyPair with all private key elements in XML format.