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int BIO_read(BIO *b, void *buf, int len);
BIO_read() attempts to read
len
bytes from BIO
b
and places the data in
buf
.
BIO_read() read encrypted data from the output BIO.
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int BIO_write(BIO *b, void *buf, int len);
BIO_write() attempts to write
len
bytes from
buf
to BIO
b
.
BIO_write() write encrypted data into the input BIO.
https://www.openssl.org/docs/man1.0.2/man3/BIO_write.html
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int SSL_read(SSL *ssl, void *buf, int num);
SSL_read() try to read
num
bytes from the specified
ssl
into the buffer
buf
.
SSL_read() read unencrypted data which is stored in the input BIO.
https://www.openssl.org/docs/man1.1.1/man3/SSL_read.html
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int SSL_write(SSL *ssl, void *buf, int num);
SSL_write() write
num
bytes from the buffer
buf
into the specified
ssl
connection.
SSL_write() write unencrypted data into the output BIO.