@interface _GDSHMACGenerator : NSObject + (id)HMACSignedRequest:(id)a0 secret:(id)a1 secretVersion:(id)a2; + (id)SHA256_HashStringFromData:(id)a0; + (id)HMAC_SHA256Digest:(id)a0 key:(id)a1; + (id)bucketedEpochTimeStamp; + (id)encodeStringToBase64:(id)a0; + (id)generateURLRequest:(id)a0 secretVersion:(id)a1 signature:(id)a2 content:(id)a3 timestamp:(id)a4; @end