Man pages matching name tspi_decodeber_tssblob in section 3:

Tspi_DecodeBER_TssBlob.3.en	debian 10 / libtspi-dev
Tspi_DecodeBER_TssBlob.3.en	debian 11 / libtspi-dev
Tspi_DecodeBER_TssBlob.3.en	debian 12 / libtspi-dev