cpython

5f13018a - [3.11] gh-100372: Use BIO_eof to detect EOF for SSL_FILETYPE_ASN1 (GH-100373) (#153311)

[3.11] gh-100372: Use BIO_eof to detect EOF for SSL_FILETYPE_ASN1 (GH-100373) (#153311) gh-100372: Use BIO_eof to detect EOF for SSL_FILETYPE_ASN1 (GH-100373) In PEM, we need to parse until error and then suppress `PEM_R_NO_START_LINE`, because PEM allows arbitrary leading and trailing data. DER, however, does not. Parsing until error and suppressing `ASN1_R_HEADER_TOO_LONG` doesn't quite work because that error also covers some cases that should be rejected. Instead, check `BIO_eof` early and stop the loop that way. (cherry picked from commit acfe02f3b05436658d92add6b168538b30f357f0) Automerge-Triggered-By: GH:Yhg1s Co-authored-by: David Benjamin <davidben@google.com> Co-authored-by: Petr Viktorin <encukou@gmail.com>