0x4c, 0x25, 0x6e, 0xa1, 0x63, 0x58, 0xb7, 0x3c, 0x26, 0x99, 0xa9, 0x59, 0x9a, 0x5d, 0xf3, 0xb7,
	0x9b, 0xf8, 0x14, 0x95, 0x63, 0xc8, 0x1f, 0x3d, 0x53, 0xb7, 0x34, 0xbb, 0xe2, 0xaf, 0x0a, 0xec,
	0x20, 0xbc, 0xc1, 0xe8, 0x30, 0xe0, 0x0b, 0x31, 0x05, 0xb3, 0x54, 0x08, 0xec, 0xb9, 0xc1, 0x7d,
	0x54, 0x65, 0x49, 0xc2, 0x25, 0x93, 0x11, 0x4f, 0x32, 0xf3, 0xd0, 0x2a, 0xd9, 0x55, 0xb7, 0xe5,

		commonCounter,
		commonInput,
		[]byte{
			0x60, 0x1e, 0xc3, 0x13, 0x77, 0x57, 0x89, 0xa5, 0xb7, 0xa7, 0xf5, 0x04, 0xbb, 0xf3, 0xd2, 0x28,
			0xf4, 0x43, 0xe3, 0xca, 0x4d, 0x62, 0xb5, 0x9a, 0xca, 0x84, 0xe9, 0x90, 0xca, 0xca, 0xf5, 0xc5,
			0x2b, 0x09, 0x30, 0xda, 0xa2, 0x3d, 0xe9, 0x4c, 0xe8, 0x70, 0x17, 0xba, 0x2d, 0x84, 0x98, 0x8d,
			0xdf, 0xc9, 0xc5, 0x8d, 0xb6, 0x7a, 0xad, 0xa6, 0x13, 0xc2, 0xdd, 0x08, 0x45, 0x79, 0x41, 0xa6,
		},
	},
}

		"OFB-AES128",
		commonKey128,
		commonIV,
		commonInput,
		[]byte{
			0x3b, 0x3f, 0xd9, 0x2e, 0xb7, 0x2d, 0xad, 0x20, 0x33, 0x34, 0x49, 0xf8, 0xe8, 0x3c, 0xfb, 0x4a,
			0x77, 0x89, 0x50, 0x8d, 0x16, 0x91, 0x8f, 0x03, 0xf5, 0x3c, 0x52, 0xda, 0xc5, 0x4e, 0xd8, 0x25,
			0x97, 0x40, 0x05, 0x1e, 0x9c, 0x5f, 0xec, 0xf6, 0x43, 0x44, 0xf7, 0xa8, 0x22, 0x60, 0xed, 0xcc,

	BYTE $0xe3; BYTE $0xe4; BYTE $0xe5; BYTE $0xe6
	BYTE $0xe7; BYTE $0xe8; BYTE $0xe9; BYTE $0xad
	BYTE $0xe0; BYTE $0xbd; BYTE $0x5f; BYTE $0x6d
	BYTE $0x79; BYTE $0x81; BYTE $0x82; BYTE $0x83
	BYTE $0x84; BYTE $0x85; BYTE $0x86; BYTE $0x87
	BYTE $0x88; BYTE $0x89; BYTE $0x91; BYTE $0x92
	BYTE $0x93; BYTE $0x94; BYTE $0x95; BYTE $0x96
	BYTE $0x97; BYTE $0x98; BYTE $0x99; BYTE $0xa2
	BYTE $0xa3; BYTE $0xa4; BYTE $0xa5; BYTE $0xa6

	},
	{
		"bad header (FCHECK)",
		"",
		[]byte{0x78, 0x9f, 0x03, 0x00, 0x00, 0x00, 0x00, 0x01},
		nil,
		ErrHeader,
	},
	{
		"bad checksum",
		"",
		[]byte{0x78, 0x9c, 0x03, 0x00, 0x00, 0x00, 0x00, 0xff},
		nil,
		ErrChecksum,
	},
	{
		"not enough data",
		"",
		[]byte{0x78, 0x9c, 0x03, 0x00, 0x00, 0x00},
		nil,
		io.ErrUnexpectedEOF,
	},
	{
		"excess data is silently ignored",
		"",

package cipher_test

// Common values for tests.

var commonInput = []byte{
	0x6b, 0xc1, 0xbe, 0xe2, 0x2e, 0x40, 0x9f, 0x96, 0xe9, 0x3d, 0x7e, 0x11, 0x73, 0x93, 0x17, 0x2a,
	0xae, 0x2d, 0x8a, 0x57, 0x1e, 0x03, 0xac, 0x9c, 0x9e, 0xb7, 0x6f, 0xac, 0x45, 0xaf, 0x8e, 0x51,
	0x30, 0xc8, 0x1c, 0x46, 0xa3, 0x5c, 0xe4, 0x11, 0xe5, 0xfb, 0xc1, 0x19, 0x1a, 0x0a, 0x52, 0xef,
	0xf6, 0x9f, 0x24, 0x45, 0xdf, 0x4f, 0x9b, 0x17, 0xad, 0x2b, 0x41, 0x7b, 0xe6, 0x6c, 0x37, 0x10,

	sig := []byte{
		0x95, 0x59, 0x6f, 0xd3, 0x10, 0xa2, 0xe7, 0xa2, 0x92, 0x9d,
		0x4a, 0x07, 0x2e, 0x2b, 0x27, 0xcc, 0x06, 0xc2, 0x87, 0x2c,
		0x52, 0xf0, 0x4a, 0xcc, 0x05, 0x94, 0xf2, 0xc3, 0x2e, 0x20,
		0xd7, 0x3e, 0x66, 0x62, 0xb5, 0x95, 0x2b, 0xa3, 0x93, 0x9a,
		0x66, 0x64, 0x25, 0xe0, 0x74, 0x66, 0x8c, 0x3e, 0x92, 0xeb,
		0xc6, 0xe6, 0xc0, 0x44, 0xf3, 0xb4, 0xb4, 0x2e, 0x8c, 0x66,
		0x0a, 0x37, 0x9c, 0x69,
	}

	0x10, 0xc6, 0xf1, 0xd6, 0x22, 0x91, 0x88, 0x93, 0x73, 0xdc, 0x39, 0x82, 0x46, 0xf3, 0x04, 0xb8,
	0x6e, 0x94, 0xae, 0x59, 0xba, 0x6b, 0xba, 0x4e, 0xe0, 0x78, 0x04, 0x1e, 0x6b, 0x72, 0x72, 0x92,
	0x95, 0x17, 0x21, 0x69, 0x11, 0x48, 0xdc, 0xfd, 0xc5, 0xef, 0xf2, 0x6d, 0x0e, 0xdd, 0x71, 0x40,
	0xcb, 0xa4, 0xbc, 0x75, 0xaa, 0x69, 0x6d, 0xaf, 0xc3, 0x9d, 0x7c, 0x67, 0x28, 0x8c, 0x7d, 0xb4,

		for i := range p224GG {
			if i == 0 {
				p224GG[i].SetBytes([]byte{0x6a, 0x0f, 0xec, 0x67,
					0x85, 0x98, 0xa7, 0x92, 0x0c, 0x55, 0xb2, 0xd4,
					0x0b, 0x2d, 0x6f, 0xfb, 0xbe, 0xa3, 0xd8, 0xce,
					0xf3, 0xfb, 0x36, 0x32, 0xdc, 0x69, 0x1b, 0x74})
			} else {
				p224GG[i].Square(&p224GG[i-1])
			}
		}
	})

	// r <- x^((q+1)/2) = x^(2^127)
	// v <- x^q = x^(2^128-1)

}

var p256Order = []byte{
	0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
	0xbc, 0xe6, 0xfa, 0xad, 0xa7, 0x17, 0x9e, 0x84,
	0xf3, 0xb9, 0xca, 0xc2, 0xfc, 0x63, 0x25, 0x51}

// P384 returns a [Curve] which implements NIST P-384 (FIPS 186-3, section D.2.4),
// also known as secp384r1.
//
// Multiple invocations of this function will return the same value, which can