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    Command:

    SSL_CTX_set_default_passwd_cb

    
    
    
    

    SYNOPSIS

            #include <openssl/ssl.h>
    
            void SSL_CTX_set_default_passwd_cb(SSL_CTX *ctx, pem_password_cb *cb);
            void SSL_CTX_set_default_passwd_cb_userdata(SSL_CTX *ctx, void *u);
    
            int pem_passwd_cb(char *buf, int size, int rwflag, void *userdata);
    
    
    

    DESCRIPTION

           SSL_CTX_set_default_passwd_cb() sets the default password callback
           called when loading/storing a PEM certificate with encryption.
    
           SSL_CTX_set_default_passwd_cb_userdata() sets a pointer to userdata
           which will be provided to the password callback on invocation.
    
           The pem_passwd_cb(), which must be provided by the application, hands
           back the password to be used during decryption. On invocation a pointer
           to userdata is provided. The pem_passwd_cb must write the password into
           the provided buffer buf which is of size size. The actual length of the
           password must be returned to the calling function. rwflag indicates
           whether the callback is used for reading/decryption (rwflag=0) or
           writing/encryption (rwflag=1).
    
    
    

    NOTES

           When loading or storing private keys, a password might be supplied to
           protect the private key. The way this password can be supplied may
           depend on the application. If only one private key is handled, it can
           be practical to have pem_passwd_cb() handle the password dialog
           interactively. If several keys have to be handled, it can be practical
           to ask for the password once, then keep it in memory and use it several
           times. In the last case, the password could be stored into the userdata
           storage and the pem_passwd_cb() only returns the password already
           stored.
    
           When asking for the password interactively, pem_passwd_cb() can use
           rwflag to check, whether an item shall be encrypted (rwflag=1).  In
           this case the password dialog may ask for the same password twice for
           comparison in order to catch typos, that would make decryption
           impossible.
    
           Other items in PEM formatting (certificates) can also be encrypted, it
           is however not usual, as certificate information is considered public.
    
    
    

    RETURN VALUES

           SSL_CTX_set_default_passwd_cb() and
           SSL_CTX_set_default_passwd_cb_userdata() do not provide diagnostic
           information.
    
    
    

    EXAMPLES

           The following example returns the password provided as userdata to the
           calling function. The password is considered to be a '\0' terminated
    
    
    

    1.0.1e 2013-02-11 SSL_CTX_set_default_passwd_cb(3)

    
    
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