Re: Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-19 Thread Ger Hobbelt
PROTECTED] On Behalf Of Michael Sierchio Sent: 17 September 2008 22:48 To: openssl-users@openssl.org Subject: Re: Do you have to pre-pend 16 bytes to a raw value before RSA encryption Kenneth Goldman wrote: What padding are you specifying? I suspect that you are specifying no padding

RE: Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-19 Thread Peter Walker
the stuff anyway ;) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ger Hobbelt Sent: 18 September 2008 10:21 To: openssl-users@openssl.org Subject: Re: Do you have to pre-pend 16 bytes to a raw value before RSA encryption :-) Well, the 'funny' bit in your

RE: Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-18 Thread Peter Walker
@openssl.org Subject: Re: Do you have to pre-pend 16 bytes to a raw value before RSA encryption Kenneth Goldman wrote: What padding are you specifying? I suspect that you are specifying no padding, in which case the size of the input must be the same as the size of the key. No. The input

Re: Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-18 Thread Michael Sierchio
Peter Walker wrote: The purpose of my application is to send a credit card number in encrypted format. Then use OAEP. - M __ OpenSSL Project http://www.openssl.org User Support Mailing List

RE: Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-18 Thread Peter Walker
But the peer uses RSA_PKCS1_PADDING. Is this interchangeable with OAEP? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Michael Sierchio Sent: 18 September 2008 10:02 To: openssl-users@openssl.org Subject: Re: Do you have to pre-pend 16 bytes to a raw

Re: Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-18 Thread Goetz Babin-Ebell
| Subject: Re: Do you have to pre-pend 16 bytes to a raw value before RSA | encryption | | Peter Walker wrote: | | The purpose of my application is to send a credit card number in | encrypted format. | | Then use OAEP. For that the upstream server must also use OAEP. Since it obviously doesn't, OAEP

RE: Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-18 Thread David Schwartz
Peter Walker wrote: Sorry if this sounds ultra noobish but you guys lost me, even though you probably did answer my question ;) The purpose of my application is to send a credit card number in encrypted format. So the parent companies webservice issues me a X509 certificate which

RE: Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-18 Thread Peter Walker
19:25 To: openssl-users@openssl.org Subject: RE: Do you have to pre-pend 16 bytes to a raw value before RSA encryption Peter Walker wrote: Sorry if this sounds ultra noobish but you guys lost me, even though you probably did answer my question ;) The purpose of my application is to send

Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-17 Thread Peter Walker
I just completed writing my first program using libcrypto to handle RSA encryption sing a public key extracted from a X509 certificate. This program communicates with a service created by our parent company. The first attempts that I made to run my program against the service, resulted in an

Re: Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-17 Thread Kenneth Goldman
[EMAIL PROTECTED] wrote on 09/17/2008 08:10:09 AM: I just completed writing my first program using libcrypto to handle RSA encryption sing a public key extracted from a X509 certificate. This program communicates with a service created by our parent company. The first attempts that I made to

RE: Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-17 Thread Peter Walker
Goldman Sent: 17 September 2008 15:47 To: openssl-users@openssl.org Subject: Re: Do you have to pre-pend 16 bytes to a raw value before RSA encryption [EMAIL PROTECTED] wrote on 09/17/2008 08:10:09 AM: I just completed writing my first program using libcrypto to handle RSA encryption sing

Re: Do you have to pre-pend 16 bytes to a raw value before RSA encryption

2008-09-17 Thread Michael Sierchio
Kenneth Goldman wrote: What padding are you specifying? I suspect that you are specifying no padding, in which case the size of the input must be the same as the size of the key. No. The input is the same size as the *modulus*. When used in encryption the recommended approach for RSA is to