>From: owner-openssl-us...@openssl.org On Behalf Of Khuc, Chuong D. >Sent: Friday, 18 May, 2012 17:22
>I have an ECDSA private key in the form of a 32 byte unsigned char array, >and a data that needs to be signed using that key. So I wrote the following >code to load the key and use it to sign my data: <snip: add PEM header/footer> >in=BIO_new_mem_buf(tempkey,hdrlen+ftrlen+32); >pkey=PEM_read_bio_ECPrivateKey(in, NULL, NULL, NULL); >And right there, pkey is returned to me as NULL. <snip> >So please tell me what I did wrong. Thank you so much. What exactly is in your 32-uchar array? It can't possibly be a PEM-body or even DER encoding of OpenSSL's ECPrivateKey, which is minimum 112 chars or 82 bytes respectively. It would be the right size to be the raw priv_key value for some 256-bit curve, perhaps secp256k1 which is fairly common. If so, it appears to me you can use EC_KEY_new_by_curve_name and put your privkey in a bignum and use EC_KEY_set_private_key. ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
