Hi Jakob, Thanks for your reply, please find the details given below and also please look topic which I have posted in the same forum today with the title "openssl-1.0.1e RSA signature verification fails" which will some more details.
1. How many bits are your RSA public key (the modulus), this is also the number of bits in the signature. It is 128 bits 2. Which hash algorithm (such as MD5 or SHA-256) is used by the signature you are trying to verify? It is SHA1 not sure whether it SHA-256(as such I am searching for the right algorithm string to pass to EVP_PKEY_asn1_find_str(&tmpeng, algname, -1) function. 3. Which RSA padding scheme is used when converting the raw hash value into RSA input? For example are you using PKCS#1 v. 1.x padding, PSS (PKCS#1 v. 2.1), or one of the ISO 9796 schemes. Padding method is EVP_MD_CTX ctx EVP_MD_CTX_FLAG_PAD_PKCS1 Hope to get the answer for this. Thanks, Lavanya -- View this message in context: http://openssl.6102.n7.nabble.com/Hi-tp45235p45258.html Sent from the OpenSSL - User mailing list archive at Nabble.com. ______________________________________________________________________ OpenSSL Project http://www.openssl.org User Support Mailing List openssl-users@openssl.org Automated List Manager majord...@openssl.org
