PEM doc fixes

[openssl.git] / doc / crypto / EVP_BytesToKey.pod

diff --git a/doc/crypto/EVP_BytesToKey.pod b/doc/crypto/EVP_BytesToKey.pod
index d07ae6c7b514a92f9d2c85aa0500cc742c3f7efb..e6df57df60a266a1d1ef8dda584d0e8283a9bf95 100644 (file)
--- a/doc/crypto/EVP_BytesToKey.pod
+++ b/doc/crypto/EVP_BytesToKey.pod
@@ -29,7 +29,7 @@ A typical application of this function is to derive keying material for an
 encryption algorithm from a password in the B<data> parameter.
 
 Increasing the B<count> parameter slows down the algorithm which makes it
-harder for an attacker to peform a brute force attack using a large number
+harder for an attacker to perform a brute force attack using a large number
 of candidate passwords.
 
 If the total key and IV length is less than the digest length and
@@ -46,7 +46,7 @@ enough data is available for the key and IV. D_i is defined as:
 
        D_i = HASH^count(D_(i-1) || data || salt)
 
-where || denotes concatentaion, D_0 is empty, HASH is the digest
+where || denotes concatenation, D_0 is empty, HASH is the digest
 algorithm in use, HASH^1(data) is simply HASH(data), HASH^2(data)
 is HASH(HASH(data)) and so on.
 
@@ -55,7 +55,10 @@ the IV.
 
 =head1 RETURN VALUES
 
-EVP_BytesToKey() returns the size of the derived key in bytes, or 0 on error.
+If B<data> is NULL, then EVP_BytesToKey() returns the number of bytes
+needed to store the derived key.
+Otherwise, EVP_BytesToKey() returns the size of the derived key in bytes,
+or 0 on error.
 
 =head1 SEE ALSO