1 files changed, 54 insertions, 13 deletions

diff --git a/src/lib/libcrypto/doc/MD5.pod b/src/lib/libcrypto/doc/MD5.pod
index 056f94bd9e..b0edd5416f 100644
--- a/src/lib/libcrypto/doc/MD5.pod
+++ b/src/lib/libcrypto/doc/MD5.pod
@@ -2,10 +2,33 @@
 
 =head1 NAME
 
-MD5, MD5_Init, MD5_Update, MD5_Final - MD5 hash functions
+MD2, MD4, MD5, MD2_Init, MD2_Update, MD2_Final, MD4_Init, MD4_Update,
+MD4_Final, MD5_Init, MD5_Update, MD5_Final - MD2, MD4, and MD5 hash functions
 
 =head1 SYNOPSIS
 
+ #include <openssl/md2.h>
+
+ unsigned char *MD2(const unsigned char *d, unsigned long n,
+                  unsigned char *md);
+
+ int MD2_Init(MD2_CTX *c);
+ int MD2_Update(MD2_CTX *c, const unsigned char *data,
+                  unsigned long len);
+ int MD2_Final(unsigned char *md, MD2_CTX *c);
+
+
+ #include <openssl/md4.h>
+
+ unsigned char *MD4(const unsigned char *d, unsigned long n,
+                  unsigned char *md);
+
+ int MD4_Init(MD4_CTX *c);
+ int MD4_Update(MD4_CTX *c, const void *data,
+                  unsigned long len);
+ int MD4_Final(unsigned char *md, MD4_CTX *c);
+
+
  #include <openssl/md5.h>
 
  unsigned char *MD5(const unsigned char *d, unsigned long n,
@@ -18,43 +41,61 @@ MD5, MD5_Init, MD5_Update, MD5_Final - MD5 hash functions
 
 =head1 DESCRIPTION
 
-MD5 is a cryptographic hash function with a 128 bit output.
+MD2, MD4, and MD5 are cryptographic hash functions with a 128 bit output.
 
-MD5() computes the MD5 message digest of the B<n> bytes at B<d> and
-places it in B<md> (which must have space for MD5_DIGEST_LENGTH == 16
+MD2(), MD4(), and MD5() compute the MD2, MD4, and MD5 message digest
+of the B<n> bytes at B<d> and place it in B<md> (which must have space
+for MD2_DIGEST_LENGTH == MD4_DIGEST_LENGTH == MD5_DIGEST_LENGTH == 16
 bytes of output). If B<md> is NULL, the digest is placed in a static
 array.
 
 The following functions may be used if the message is not completely
 stored in memory:
 
+MD2_Init() initializes a B<MD2_CTX> structure.
+
+MD2_Update() can be called repeatedly with chunks of the message to
+be hashed (B<len> bytes at B<data>).
+
+MD2_Final() places the message digest in B<md>, which must have space
+for MD2_DIGEST_LENGTH == 16 bytes of output, and erases the B<MD2_CTX>.
+
+MD4_Init(), MD4_Update(), MD4_Final(), MD5_Init(), MD5_Update(), and
+MD5_Final() are analogous using an B<MD4_CTX> and B<MD5_CTX> structure.
+
 Applications should use the higher level functions
 L<EVP_DigestInit(3)|EVP_DigestInit(3)>
 etc. instead of calling the hash functions directly.
 
 =head1 NOTE
 
-MD5 is recommended only for compatibility with legacy applications.
-In new applications, SHA-2 should be preferred.
+MD2, MD4, and MD5 are recommended only for compatibility with existing
+applications. In new applications, SHA-1 or RIPEMD-160 should be
+preferred.
 
 =head1 RETURN VALUES
 
-MD5() returns a pointer to the hash value.
+MD2(), MD4(), and MD5() return pointers to the hash value.
 
-MD5_Init(), MD5_Update(), and MD5_Final() return 1 for success, 0
-otherwise.
+MD2_Init(), MD2_Update(), MD2_Final(), MD4_Init(), MD4_Update(),
+MD4_Final(), MD5_Init(), MD5_Update(), and MD5_Final() return 1 for
+success, 0 otherwise.
 
 =head1 CONFORMING TO
 
-RFC 1321
+RFC 1319, RFC 1320, RFC 1321
 
 =head1 SEE ALSO
 
-L<EVP_DigestInit(3)|EVP_DigestInit(3)>
+L<sha(3)|sha(3)>, L<ripemd(3)|ripemd(3)>, L<EVP_DigestInit(3)|EVP_DigestInit(3)>
 
 =head1 HISTORY
 
-MD5(), MD5_Init(), MD5_Update() and MD5_Final() are available in all
-versions of OpenSSL.
+MD2(), MD2_Init(), MD2_Update() MD2_Final(), MD5(), MD5_Init(),
+MD5_Update() and MD5_Final() are available in all versions of SSLeay
+and OpenSSL.
+
+MD4(), MD4_Init(), and MD4_Update() are available in OpenSSL 0.9.6 and
+above.
 
 =cut