method

sysverify

v2_2_9 - Show latest stable - Class: OpenSSL::PKey::DSA

sysverify(p1, p2)

public

Verifies whether the signature is valid given the message digest input. It does so by validating sig using the public key of this DSA instance.

Parameters

digest is a message digest of the original input data to be signed
sig is a DSA signature value

Example

dsa = OpenSSL::PKey::DSA.new(2048)
doc = "Sign me"
digest = OpenSSL::Digest::SHA1.digest(doc)
sig = dsa.syssign(digest)
puts dsa.sysverify(digest, sig) # => true

static VALUE
ossl_dsa_verify(VALUE self, VALUE digest, VALUE sig)
{
    EVP_PKEY *pkey;
    int ret;

    GetPKeyDSA(self, pkey);
    StringValue(digest);
    StringValue(sig);
    /* type is ignored (0) */
    ret = DSA_verify(0, (unsigned char *)RSTRING_PTR(digest), RSTRING_LENINT(digest),
                     (unsigned char *)RSTRING_PTR(sig), RSTRING_LENINT(sig), pkey->pkey.dsa);
    if (ret < 0) {
        ossl_raise(eDSAError, NULL);
    }
    else if (ret == 1) {
        return Qtrue;
    }

    return Qfalse;
}

sysverify

Parameters

Example

Related methods