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use core_foundation_sys::base::{CFTypeRef, CFTypeID, CFIndex};
use core_foundation_sys::error::CFErrorRef;
use core_foundation_sys::string::CFStringRef;

use transform::SecTransformRef;

extern "C" {
    pub static kSecDigestHMACKeyAttribute: CFStringRef;
    pub static kSecDigestHMACMD5: CFStringRef;
    pub static kSecDigestHMACSHA1: CFStringRef;
    pub static kSecDigestHMACSHA2: CFStringRef;
    pub static kSecDigestLengthAttribute: CFStringRef;
    pub static kSecDigestMD2: CFStringRef;
    pub static kSecDigestMD4: CFStringRef;
    pub static kSecDigestMD5: CFStringRef;
    pub static kSecDigestSHA1: CFStringRef;
    pub static kSecDigestSHA2: CFStringRef;
    pub static kSecDigestTypeAttribute: CFStringRef;

    pub fn SecDigestTransformCreate(digestType: CFTypeRef,
                                    digestLength: CFIndex,
                                    error: *mut CFErrorRef)
                                    -> SecTransformRef;

    pub fn SecDigestTransformGetTypeID() -> CFTypeID;
}