Re: openssh rsa encrypt problem

"Mike" == Mike <- EMAIL IGNORED <m_d_berger_1900@xxxxxxxxx>> writes:

Mike> On Linux FC4, I am trying to use openssl to encrypt messages.
Mike> Here is my script:

Mike> #!/bin/bash openssl rsautl -in $1.txt -out $1.crp \ -inkey
Mike> public_key -pubin -encrypt

Mike> It works for small input files, but for an input file of length
Mike> 286 bytes I get:

Mike> RSA operation error 27358:error:0406D06E:rsa
Mike> routines:RSA_padding_add_PKCS1_type_2:data too large for key
Mike> size:rsa_pk1.c:151:

Mike> Is there something I can do about this? I would hope it is
Mike> possible to encrypt large messages.

You never encrypt large amounts of data directly with RSA (or other
public-key algorithms) -- they are far too slow. You encrypt bulk data
with a symmetric cipher, then encrypt the symmetric key with RSA.

--
Richard Silverman
res@xxxxxxxx

.

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