The test file was created by manually modifying
tests/data_files/pkcs7_data_without_cert_signed.der, using
ASN.1 JavaScript decoder https://lapo.it/asn1js/
Changes made:
The SignerInfos set was truncated to zero length.
All the parent sequences, sets, etc were then adjusted
for their new reduced length.
Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
