Document hash functions.

12 files changed, 20 insertions, 18 deletions

diff --git a/crypto/hmac/hmac.c b/crypto/hmac/hmac.c
index 5c349bbb56..23b7c98f8f 100644
--- a/crypto/hmac/hmac.c
+++ b/crypto/hmac/hmac.c
@@ -109,7 +109,7 @@ void HMAC_Init(HMAC_CTX *ctx, const void *key, int len,
 	memcpy(&ctx->md_ctx,&ctx->i_ctx,sizeof(ctx->i_ctx));
 	}
 
-void HMAC_Update(HMAC_CTX *ctx, unsigned char *data, int len)
+void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, int len)
 	{
 	EVP_DigestUpdate(&(ctx->md_ctx),data,len);
 	}
@@ -134,7 +134,7 @@ void HMAC_cleanup(HMAC_CTX *ctx)
 	}
 
 unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
-		    unsigned char *d, int n, unsigned char *md,
+		    const unsigned char *d, int n, unsigned char *md,
 		    unsigned int *md_len)
 	{
 	HMAC_CTX c;
diff --git a/crypto/hmac/hmac.h b/crypto/hmac/hmac.h
index f928975fcd..223eeda7f3 100644
--- a/crypto/hmac/hmac.h
+++ b/crypto/hmac/hmac.h
@@ -85,11 +85,11 @@ typedef struct hmac_ctx_st
 
 void HMAC_Init(HMAC_CTX *ctx, const void *key, int len,
 	       const EVP_MD *md);
-void HMAC_Update(HMAC_CTX *ctx,unsigned char *key, int len);
+void HMAC_Update(HMAC_CTX *ctx, const unsigned char *data, int len);
 void HMAC_Final(HMAC_CTX *ctx, unsigned char *md, unsigned int *len);
 void HMAC_cleanup(HMAC_CTX *ctx);
 unsigned char *HMAC(const EVP_MD *evp_md, const void *key, int key_len,
-		    unsigned char *d, int n, unsigned char *md,
+		    const unsigned char *d, int n, unsigned char *md,
 		    unsigned int *md_len);
 
 
diff --git a/crypto/md2/md2.h b/crypto/md2/md2.h
index 0d3592506c..582bffb859 100644
--- a/crypto/md2/md2.h
+++ b/crypto/md2/md2.h
@@ -81,9 +81,9 @@ typedef struct MD2state_st
 
 const char *MD2_options(void);
 void MD2_Init(MD2_CTX *c);
-void MD2_Update(MD2_CTX *c, register unsigned char *data, unsigned long len);
+void MD2_Update(MD2_CTX *c, const unsigned char *data, unsigned long len);
 void MD2_Final(unsigned char *md, MD2_CTX *c);
-unsigned char *MD2(unsigned char *d, unsigned long n,unsigned char *md);
+unsigned char *MD2(const unsigned char *d, unsigned long n,unsigned char *md);
 #ifdef  __cplusplus
 }
 #endif
diff --git a/crypto/md2/md2_dgst.c b/crypto/md2/md2_dgst.c
index c7d8d6aef5..b6c2f15c3c 100644
--- a/crypto/md2/md2_dgst.c
+++ b/crypto/md2/md2_dgst.c
@@ -123,7 +123,7 @@ void MD2_Init(MD2_CTX *c)
 	memset(c->data,0,MD2_BLOCK);
 	}
 
-void MD2_Update(MD2_CTX *c, register unsigned char *data, unsigned long len)
+void MD2_Update(MD2_CTX *c, const unsigned char *data, unsigned long len)
 	{
 	register UCHAR *p;
 
diff --git a/crypto/md2/md2_one.c b/crypto/md2/md2_one.c
index 7157299d95..b12c37ce4d 100644
--- a/crypto/md2/md2_one.c
+++ b/crypto/md2/md2_one.c
@@ -63,7 +63,7 @@
 /* This is a separate file so that #defines in cryptlib.h can
  * map my MD functions to different names */
 
-unsigned char *MD2(unsigned char *d, unsigned long n, unsigned char *md)
+unsigned char *MD2(const unsigned char *d, unsigned long n, unsigned char *md)
 	{
 	MD2_CTX c;
 	static unsigned char m[MD2_DIGEST_LENGTH];
diff --git a/crypto/md5/md5.h b/crypto/md5/md5.h
index bdab6d45e8..d9b7383446 100644
--- a/crypto/md5/md5.h
+++ b/crypto/md5/md5.h
@@ -105,7 +105,7 @@ typedef struct MD5state_st
 void MD5_Init(MD5_CTX *c);
 void MD5_Update(MD5_CTX *c, const unsigned char *data, unsigned long len);
 void MD5_Final(unsigned char *md, MD5_CTX *c);
-unsigned char *MD5(unsigned char *d, unsigned long n, unsigned char *md);
+unsigned char *MD5(const unsigned char *d, unsigned long n, unsigned char *md);
 void MD5_Transform(MD5_CTX *c, const unsigned char *b);
 #ifdef  __cplusplus
 }
diff --git a/crypto/md5/md5_one.c b/crypto/md5/md5_one.c
index 4b10e7f940..b89dec850d 100644
--- a/crypto/md5/md5_one.c
+++ b/crypto/md5/md5_one.c
@@ -64,7 +64,7 @@
 #include <openssl/ebcdic.h>
 #endif
 
-unsigned char *MD5(unsigned char *d, unsigned long n, unsigned char *md)
+unsigned char *MD5(const unsigned char *d, unsigned long n, unsigned char *md)
 	{
 	MD5_CTX c;
 	static unsigned char m[MD5_DIGEST_LENGTH];
diff --git a/crypto/mdc2/mdc2.h b/crypto/mdc2/mdc2.h
index ec8e159fc9..00acd707cd 100644
--- a/crypto/mdc2/mdc2.h
+++ b/crypto/mdc2/mdc2.h
@@ -82,9 +82,10 @@ typedef struct mdc2_ctx_st
 
 
 void MDC2_Init(MDC2_CTX *c);
-void MDC2_Update(MDC2_CTX *c, unsigned char *data, unsigned long len);
+void MDC2_Update(MDC2_CTX *c, const unsigned char *data, unsigned long len);
 void MDC2_Final(unsigned char *md, MDC2_CTX *c);
-unsigned char *MDC2(unsigned char *d, unsigned long n, unsigned char *md);
+unsigned char *MDC2(const unsigned char *d, unsigned long n,
+	unsigned char *md);
 
 #ifdef  __cplusplus
 }
diff --git a/crypto/mdc2/mdc2_one.c b/crypto/mdc2/mdc2_one.c
index 1c3a093c39..6cd141b4d6 100644
--- a/crypto/mdc2/mdc2_one.c
+++ b/crypto/mdc2/mdc2_one.c
@@ -60,7 +60,7 @@
 #include "cryptlib.h"
 #include <openssl/mdc2.h>
 
-unsigned char *MDC2(unsigned char *d, unsigned long n, unsigned char *md)
+unsigned char *MDC2(const unsigned char *d, unsigned long n, unsigned char *md)
 	{
 	MDC2_CTX c;
 	static unsigned char m[MDC2_DIGEST_LENGTH];
diff --git a/crypto/mdc2/mdc2dgst.c b/crypto/mdc2/mdc2dgst.c
index aed715c69d..c630a24c2e 100644
--- a/crypto/mdc2/mdc2dgst.c
+++ b/crypto/mdc2/mdc2dgst.c
@@ -74,7 +74,7 @@
 			*((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 			*((c)++)=(unsigned char)(((l)>>24L)&0xff))
 
-static void mdc2_body(MDC2_CTX *c, unsigned char *in, unsigned int len);
+static void mdc2_body(MDC2_CTX *c, const unsigned char *in, unsigned int len);
 void MDC2_Init(MDC2_CTX *c)
 	{
 	c->num=0;
@@ -83,7 +83,7 @@ void MDC2_Init(MDC2_CTX *c)
 	memset(&(c->hh[0]),0x25,MDC2_BLOCK);
 	}
 
-void MDC2_Update(MDC2_CTX *c, register unsigned char *in, unsigned long len)
+void MDC2_Update(MDC2_CTX *c, const unsigned char *in, unsigned long len)
 	{
 	int i,j;
 
@@ -118,7 +118,7 @@ void MDC2_Update(MDC2_CTX *c, register unsigned char *in, unsigned long len)
 		}
 	}
 
-static void mdc2_body(MDC2_CTX *c, unsigned char *in, unsigned int len)
+static void mdc2_body(MDC2_CTX *c, const unsigned char *in, unsigned int len)
 	{
 	register DES_LONG tin0,tin1;
 	register DES_LONG ttin0,ttin1;
diff --git a/crypto/ripemd/ripemd.h b/crypto/ripemd/ripemd.h
index 4420c13e3b..730bf7a592 100644
--- a/crypto/ripemd/ripemd.h
+++ b/crypto/ripemd/ripemd.h
@@ -91,7 +91,8 @@ typedef struct RIPEMD160state_st
 void RIPEMD160_Init(RIPEMD160_CTX *c);
 void RIPEMD160_Update(RIPEMD160_CTX *c, const unsigned char *data, unsigned long len);
 void RIPEMD160_Final(unsigned char *md, RIPEMD160_CTX *c);
-unsigned char *RIPEMD160(unsigned char *d, unsigned long n, unsigned char *md);
+unsigned char *RIPEMD160(const unsigned char *d, unsigned long n,
+	unsigned char *md);
 void RIPEMD160_Transform(RIPEMD160_CTX *c, const unsigned char *b);
 #ifdef  __cplusplus
 }
diff --git a/crypto/ripemd/rmd_one.c b/crypto/ripemd/rmd_one.c
index 3d08499352..efdf2dd6ef 100644
--- a/crypto/ripemd/rmd_one.c
+++ b/crypto/ripemd/rmd_one.c
@@ -60,7 +60,7 @@
 #include <string.h>
 #include <openssl/ripemd.h>
 
-unsigned char *RIPEMD160(unsigned char *d, unsigned long n,
+unsigned char *RIPEMD160(const unsigned char *d, unsigned long n,
 	     unsigned char *md)
 	{
 	RIPEMD160_CTX c;