标签: libtomcrypt

我正在尝试编写代码来验证一些RSA签名.签名是使用OpenSSL命令行工具制作的,使用此命令行的等效命令:

openssl dgst -sha1 -sign private_key_file.pem < binary_data_file > sig

我想用来libtomcrypt做验证:

http://www.libtom.org/

以下是RSA验证函数的调用签名libtomcrypt:

int rsa_verify_hash_ex(
    const unsigned char *sig, unsigned long siglen,  // signature to verify
    const unsigned char *hash, unsigned long hashlen,  // hash value to check against sig
    int padding,  // defined constant value, see below
    int hash_idx,  // identifies which hash algorithm, see below
    unsigned long saltlen,  // specify salt length, see below
    int *stat,  // output parameter, returns whether verify succeeded or …