Re: Read DER-encoded RSA public key in memory?
Hi, The public key in your source is encoded as a SubjectPublicKeyInfo, so you can't use d2i_PublicKey which only handles RSA public keys encoded in the PKCS#1 format. In your case, you have to use the function d2i_PUBKEY_bio to read your hard-coded key. Here is how you can do it using the same variables of your code : BIO* keyBio = BIO_new_mem_buf(TESTING_PUBLIC_KEY, sizeof(TESTING_PUBLIC_KEY)); public_key = d2i_PUBKEY_bio(keyBio, NULL); That's it! I hope this will help. Cheers, -- Mounir IDRASSI IDRIX http://www.idrix.fr Jeremy R. wrote: I'm trying to make a simple application which uses a 4096-bit RSA public key (encoded in DER format, statically compiled into the program itself. I generated this key with OpenSSL itself and I am able to do operations with it from the command-line. And I know I encoded it in the program correctly, because if I ask it to write TESTING_PUBLIC_KEY to disk, OpenSSL continues to accept it. However, when I try to use d2i_PublicKey to load it, it returns NULL. Anyone have any hints that might help me? My code is at http://pastebin.ca/1501265 and I'm compiling with VC++ (in C mode), for what it's worth. __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org
Re: Read DER-encoded RSA public key in memory?
Thanks. I switched to using d2i_PUBKEY (it really is hard-coded, so I don't think there's a reason to use BIO – if I'm mistaken, please tell me) and it now returns a valid address in memory. On 20-Jul-09, at 4:59 PM, Mounir IDRASSI wrote: Hi, The public key in your source is encoded as a SubjectPublicKeyInfo, so you can't use d2i_PublicKey which only handles RSA public keys encoded in the PKCS#1 format. In your case, you have to use the function d2i_PUBKEY_bio to read your hard-coded key. Here is how you can do it using the same variables of your code : BIO* keyBio = BIO_new_mem_buf(TESTING_PUBLIC_KEY, sizeof(TESTING_PUBLIC_KEY)); public_key = d2i_PUBKEY_bio(keyBio, NULL); That's it! I hope this will help. Cheers, -- Mounir IDRASSI IDRIX http://www.idrix.fr Jeremy R. wrote: I'm trying to make a simple application which uses a 4096-bit RSA public key (encoded in DER format, statically compiled into the program itself. I generated this key with OpenSSL itself and I am able to do operations with it from the command-line. And I know I encoded it in the program correctly, because if I ask it to write TESTING_PUBLIC_KEY to disk, OpenSSL continues to accept it. However, when I try to use d2i_PublicKey to load it, it returns NULL. Anyone have any hints that might help me? My code is at http://pastebin.ca/1501265 and I'm compiling with VC+ + (in C mode), for what it's worth. __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org
Re: Read DER-encoded RSA public key in memory?
Yes, d2i_PUBKEY is sufficient. -- Mounir IDRASSI IDRIX http://www.idrix.fr Jeremy R. wrote: Thanks. I switched to using d2i_PUBKEY (it really is hard-coded, so I don't think there's a reason to use BIO – if I'm mistaken, please tell me) and it now returns a valid address in memory. On 20-Jul-09, at 4:59 PM, Mounir IDRASSI wrote: Hi, The public key in your source is encoded as a SubjectPublicKeyInfo, so you can't use d2i_PublicKey which only handles RSA public keys encoded in the PKCS#1 format. In your case, you have to use the function d2i_PUBKEY_bio to read your hard-coded key. Here is how you can do it using the same variables of your code : BIO* keyBio = BIO_new_mem_buf(TESTING_PUBLIC_KEY, sizeof(TESTING_PUBLIC_KEY)); public_key = d2i_PUBKEY_bio(keyBio, NULL); That's it! I hope this will help. Cheers, -- Mounir IDRASSI IDRIX http://www.idrix.fr Jeremy R. wrote: I'm trying to make a simple application which uses a 4096-bit RSA public key (encoded in DER format, statically compiled into the program itself. I generated this key with OpenSSL itself and I am able to do operations with it from the command-line. And I know I encoded it in the program correctly, because if I ask it to write TESTING_PUBLIC_KEY to disk, OpenSSL continues to accept it. However, when I try to use d2i_PublicKey to load it, it returns NULL. Anyone have any hints that might help me? My code is at http://pastebin.ca/1501265 and I'm compiling with VC++ (in C mode), for what it's worth. __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org __ OpenSSL Project http://www.openssl.org User Support Mailing Listopenssl-users@openssl.org Automated List Manager majord...@openssl.org
