NBVerifier is a simple cross platform (iOS/OS X) data verifier for sha1 hashes.
[NBVerifier verifyData:testBlob publicCert:certData signature:[NBVerifier base64Decode:@"bpUApzX+QH9yn5r7lV2qkorjlJ26b/ZfP8RSHJy2Rqs/WqelnIfNrxE3ireLmDmginDMbnznRrX+6fJAMgCACrbt7TldzeCE809VFQVdpXE821QIrEFdZjIjXj6F3oXE03WOujDj699fp8oeA7X0EaULAjeoBv2VO0ZB5Uc1gaM="]]
MIT.