openssl - BIO相关函数

• 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.

 

• 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

 

• 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

 

• 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.

https://www.openssl.org/docs/man1.1.1/man3/SSL_write.html