Arquivo de retorno do banco

Galéra, já fiz de tudo, não consigo fazer a leitura correta do arquivo de retorno dos bancos... os arquivos de retorno vem algo desse tipo:

02RETORNO01COBRANCA 101000010101 BANCO ITAU TESTE 341BANCO ITAU S.A.10101010600BPI00101010101 000001

10203218102000176414600020427 00006256 175000062565 I06011009 00006256 000000000000001209500139628 000000000000000000000000000000000000000000000000000000000000000000000000000000000000001209500000000000000000000000000 01100900000000000000000000000 B3000002

10203218102000176414600020427 00006426 175000064264 I06011009 00006426 000000000000001209574804341 000000000000000000000000000000000000000000000000000000000000000000000000000000000000001209500000000000000000000000000 01100900000000000000000000000 B3000001

10203218102000176414600020427 00006468 175000064686 I06011009 00006468 000000000000001209500115057 000000000000000000000000000000000000000000000000000000000000000000000000000000000000001209500000000000000000000000000 01100900000000000000000000000 B3000002

10203218102000176414600020427 00006808 175000068083 I06011009 00006808 000000000000001800000118861 000000000000000000000000000000000000000000000000000000000000000000000000000000000000001800000000000000000000000000000 01100900000000000000000000000 B2000003

10203218102000176414600020427 00006832 175000068323 I06011009 00006832 000000000000001800010425254 000000000000000000000000000000000000000000000000000000000000000000000000000000000000001800000000000000000000000000000 01100900000000000000000000000 B5000004

10203218102000176414600020427 00006836 175000068364 I06011009 00006836 000000000000001800010425254 000000000000000000000000000000000000000000000000000000000000000000000000000000000000000306100000000000610000000000000 01100900000000000000000000000 CP000027

000000000000000000000000000000000000000000000000000000000000000000000000000000000000001475000000000000000000000000000 01100900000000000000000000000 B2001027

9201341 000000000000000000000000000000 000000000000000000000000000000 000000000000000000000000000000 000000000000000000000000000000004660000102600000010168862 001028

Alguém tem alguma solução ou conhece algum script que faz isso?

quero poder ler esses dados, ver valor pago, data, etc.