From RSA to string and compare problem
Hi, i'm creating a little client/server program using C. i need to read a rsa from pem file (so using PEM_read_RSAPublicKey) and then send the key to a server (the message can be only a string type) which reads a rsa public key from another pem file and return, comparing keys, is are egual or not. Can someone plz help me to understand if into the library already exist a way to convert the struct RSA into 1-line string and viceversa ? Which is the correct way to compare 2 keys ? Again, there are in library some ad-hoc function ? TNX A LOT __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
Re: From RSA to string and compare problem
Hello, [EMAIL PROTECTED] wrote on 06/25/2008 04:10:45 PM: Hi, i'm creating a little client/server program using C. i need to read a rsa from pem file (so using PEM_read_RSAPublicKey) and then send the key to a server (the message can be only a string type) which reads a rsa public key from another pem file and return, comparing keys, is are egual or not. What about just reading your .pem file with simple read() to char table and send this to server ? Best regards, -- Marek Marcola [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
Re: From RSA to string and compare problem
[EMAIL PROTECTED] ha scritto: Hello, [EMAIL PROTECTED] wrote on 06/25/2008 04:10:45 PM: Hi, i'm creating a little client/server program using C. i need to read a rsa from pem file (so using PEM_read_RSAPublicKey) and then send the key to a server (the message can be only a string type) which reads a rsa public key from another pem file and return, comparing keys, is are egual or not. What about just reading your .pem file with simple read() to char table and send this to server ? Best regards, -- Marek Marcola [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager [EMAIL PROTECTED] Yes of course. But nothing more elegant ? __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
Re: From RSA to string and compare problem
Hello,
[EMAIL PROTECTED] wrote on 06/25/2008 04:34:07 PM:
[EMAIL PROTECTED] ha scritto:
Hello,
[EMAIL PROTECTED] wrote on 06/25/2008 04:10:45 PM:
Hi,
i'm creating a little client/server program using C. i need to read a
rsa from pem file (so using PEM_read_RSAPublicKey) and then send the
key to a server (the message can be only a string type) which reads a
rsa public key from another pem file and return, comparing keys, is
are
egual or not.
What about just reading your .pem file with simple read() to char
table
and send this to server ?
Best regards,
--
Marek Marcola [EMAIL PROTECTED]
__
OpenSSL Project http://www.openssl.org
User Support Mailing Listopenssl-users@openssl.org
Automated List Manager [EMAIL PROTECTED]
Yes of course. But nothing more elegant ?
I do not think that in this case are more elegant solutions ...
but you can try:
You may create memory BIO:
BIO *mem;
if ((mem = BIO_new(BIO_s_mem())) == NULL) {
goto err;
}
Write public key to this bio:
if (PEM_write_bio_PUBKEY(mem, key) == 0) {
BIO_free(mem);
goto err;
}
and read to buffer in PEM format:
if ((n = BIO_read(mem, buf, *len)) = 0) {
BIO_free(mem);
goto err;
}
BIO_free(mem);
This code is not tested nor checked, hope this helps.
Best regards,
--
Marek Marcola [EMAIL PROTECTED]
__
OpenSSL Project http://www.openssl.org
User Support Mailing Listopenssl-users@openssl.org
Automated List Manager [EMAIL PROTECTED]
R: From RSA to string and compare problem
Tnx for response and your patient.
Returning on reading with read() may I ask you about comment header and
footer? It's safe to jump lines of file pem starting with - or it's
possible that the key contain the char - ?
tnx
-Messaggio originale-
Da: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Per conto di [EMAIL PROTECTED]
Inviato: giovedì 26 giugno 2008 0.57
A: openssl-users@openssl.org
Oggetto: Re: From RSA to string and compare problem
Hello,
[EMAIL PROTECTED] wrote on 06/25/2008 04:34:07 PM:
[EMAIL PROTECTED] ha scritto:
Hello,
[EMAIL PROTECTED] wrote on 06/25/2008 04:10:45 PM:
Hi,
i'm creating a little client/server program using C. i need to read a
rsa from pem file (so using PEM_read_RSAPublicKey) and then send the
key to a server (the message can be only a string type) which reads a
rsa public key from another pem file and return, comparing keys, is
are
egual or not.
What about just reading your .pem file with simple read() to char
table
and send this to server ?
Best regards,
--
Marek Marcola [EMAIL PROTECTED]
__
OpenSSL Project http://www.openssl.org
User Support Mailing Listopenssl-users@openssl.org
Automated List Manager [EMAIL PROTECTED]
Yes of course. But nothing more elegant ?
I do not think that in this case are more elegant solutions ...
but you can try:
You may create memory BIO:
BIO *mem;
if ((mem = BIO_new(BIO_s_mem())) == NULL) {
goto err;
}
Write public key to this bio:
if (PEM_write_bio_PUBKEY(mem, key) == 0) {
BIO_free(mem);
goto err;
}
and read to buffer in PEM format:
if ((n = BIO_read(mem, buf, *len)) = 0) {
BIO_free(mem);
goto err;
}
BIO_free(mem);
This code is not tested nor checked, hope this helps.
Best regards,
--
Marek Marcola [EMAIL PROTECTED]
__
OpenSSL Project http://www.openssl.org
User Support Mailing Listopenssl-users@openssl.org
Automated List Manager [EMAIL PROTECTED]
__
OpenSSL Project http://www.openssl.org
User Support Mailing Listopenssl-users@openssl.org
Automated List Manager [EMAIL PROTECTED]
Re: R: From RSA to string and compare problem
Hello, [EMAIL PROTECTED] wrote on 06/26/2008 02:06:47 AM: Returning on reading with read() may I ask you about comment header and footer? It's safe to jump lines of file pem starting with - or it's possible that the key contain the char - ? Data between BEGIN and END header is ASN1 structure encoded with base64. Base64 encoded data can have the following characters: static const char base64[] = ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz 0123456789 +/ (and '=' as padding character if required - only at end of data) As you see, there can not be '-' character inside base64 encoded data. Best regards, -- Marek Marcola [EMAIL PROTECTED] __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager [EMAIL PROTECTED]
