hx509_crypto man page

int hx509_verify_signature (hx509_context context, const hx509_cert signer, const AlgorithmIdentifier *alg, const heim_octet_string *data, const heim_octet_string *sig)

Verify a signature made using the private key of an certificate.

Parameters:

context A hx509 context.
signer the certificate that made the signature.
alg algorthm that was used to sign the data.
data the data that was signed.
sig the sigature to verify.

Returns:

An hx509 error code, see hx509_get_error_string().