Document the BN library.

1 files changed, 34 insertions, 0 deletions

diff --git a/doc/crypto/BN_copy.pod b/doc/crypto/BN_copy.pod
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+=pod
+
+=head1 NAME
+
+BN_copy, BN_dup - copy BIGNUMs
+
+=head1 SYNOPSIS
+
+ #include <openssl/bn.h>
+
+ BIGNUM *BN_copy(BIGNUM *to, const BIGNUM *from);
+
+ BIGNUM *BN_dup(const BIGNUM *from);
+
+=head1 DESCRIPTION
+
+BN_copy() copies B<from> to B<to>. BN_dup() creates a new B<BIGNUM>
+containing the value B<from>.
+
+=head1 RETURN VALUES
+
+BN_copy() returns B<to> on success, NULL on error. BN_dup() returns
+the new B<BIGNUM>, and NULL on error. The error codes can be obtained
+by ERR_get_error(3).
+
+=head1 SEE ALSO
+
+bn(3), err(3)
+
+=head1 HISTORY
+
+BN_copy() and BN_dup() are available in all versions of SSLeay and OpenSSL.
+
+=cut