X-Git-Url: https://git.openssl.org/?p=openssl.git;a=blobdiff_plain;f=doc%2Fcrypto%2FBIO_f_md.pod;h=2cc41f89d2fda1624b927844356ea31057189ffe;hp=0845d2bc2bf4f611f18c9bfd66b028c126f35b18;hb=687403fb2486eec0502ccb36689d3f57e0a173aa;hpb=8eec1389fb8e649fe971046b4108a66544955017

diff --git a/doc/crypto/BIO_f_md.pod b/doc/crypto/BIO_f_md.pod
index 0845d2bc2b..2cc41f89d2 100644
--- a/doc/crypto/BIO_f_md.pod
+++ b/doc/crypto/BIO_f_md.pod
@@ -28,10 +28,10 @@ BIO_gets(), if its B<size> parameter is large enough finishes the
 digest calculation and returns the digest value. BIO_puts() is
 not supported.
 
-BIO_reset() reinitializes a digest BIO.
+BIO_reset() reinitialises a digest BIO.
 
 BIO_set_md() sets the message digest of BIO B<b> to B<md>: this
-must be called to initialise a digest BIO before any data is
+must be called to initialize a digest BIO before any data is
 passed through it. It is a BIO_ctrl() macro.
 
 BIO_get_md() places the a pointer to the digest BIOs digest method
@@ -58,6 +58,12 @@ If an application needs to call BIO_gets() or BIO_puts() through
 a chain containing digest BIOs then this can be done by prepending
 a buffering BIO.
 
+Before OpenSSL 1.0.0 the call to BIO_get_md_ctx() would only work if the BIO
+had been initialized for example by calling BIO_set_md() ). In OpenSSL
+1.0.0 and later the context is always returned and the BIO is state is set
+to initialized. This allows applications to initialize the context externally
+if the standard calls such as BIO_set_md() are not sufficiently flexible.
+
 =head1 RETURN VALUES
 
 BIO_f_md() returns the digest BIO method.