Crypto: Add deprecation compatibility declarations for SHA* message digest functions

Also add hints to SHA256_Init.pod and CHANGES.md how to replace SHA256() etc.

Reviewed-by: Paul Dale <pauli@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/14741)

3 files changed, 2 insertions, 57 deletions

diff --git a/crypto/sha/sha1_one.c b/crypto/sha/sha1_one.c
index 5bd9953d96..b98f078739 100644
--- a/crypto/sha/sha1_one.c
+++ b/crypto/sha/sha1_one.c
@@ -17,8 +17,9 @@
 #include <string.h>
 #include <openssl/crypto.h>
 #include <openssl/sha.h>
+#include "crypto/sha.h"
 
-unsigned char *SHA1(const unsigned char *d, size_t n, unsigned char *md)
+unsigned char *ossl_sha1(const unsigned char *d, size_t n, unsigned char *md)
 {
     SHA_CTX c;
     static unsigned char m[SHA_DIGEST_LENGTH];
diff --git a/crypto/sha/sha256.c b/crypto/sha/sha256.c
index 4fa68953d1..7b3855f301 100644
--- a/crypto/sha/sha256.c
+++ b/crypto/sha/sha256.c
@@ -53,34 +53,6 @@ int SHA256_Init(SHA256_CTX *c)
     return 1;
 }
 
-unsigned char *SHA224(const unsigned char *d, size_t n, unsigned char *md)
-{
-    SHA256_CTX c;
-    static unsigned char m[SHA224_DIGEST_LENGTH];
-
-    if (md == NULL)
-        md = m;
-    SHA224_Init(&c);
-    SHA256_Update(&c, d, n);
-    SHA256_Final(md, &c);
-    OPENSSL_cleanse(&c, sizeof(c));
-    return md;
-}
-
-unsigned char *SHA256(const unsigned char *d, size_t n, unsigned char *md)
-{
-    SHA256_CTX c;
-    static unsigned char m[SHA256_DIGEST_LENGTH];
-
-    if (md == NULL)
-        md = m;
-    SHA256_Init(&c);
-    SHA256_Update(&c, d, n);
-    SHA256_Final(md, &c);
-    OPENSSL_cleanse(&c, sizeof(c));
-    return md;
-}
-
 int SHA224_Update(SHA256_CTX *c, const void *data, size_t len)
 {
     return SHA256_Update(c, data, len);
diff --git a/crypto/sha/sha512.c b/crypto/sha/sha512.c
index f0cf9ca902..a0d7f88ba9 100644
--- a/crypto/sha/sha512.c
+++ b/crypto/sha/sha512.c
@@ -338,34 +338,6 @@ void SHA512_Transform(SHA512_CTX *c, const unsigned char *data)
     sha512_block_data_order(c, data, 1);
 }
 
-unsigned char *SHA384(const unsigned char *d, size_t n, unsigned char *md)
-{
-    SHA512_CTX c;
-    static unsigned char m[SHA384_DIGEST_LENGTH];
-
-    if (md == NULL)
-        md = m;
-    SHA384_Init(&c);
-    SHA512_Update(&c, d, n);
-    SHA512_Final(md, &c);
-    OPENSSL_cleanse(&c, sizeof(c));
-    return md;
-}
-
-unsigned char *SHA512(const unsigned char *d, size_t n, unsigned char *md)
-{
-    SHA512_CTX c;
-    static unsigned char m[SHA512_DIGEST_LENGTH];
-
-    if (md == NULL)
-        md = m;
-    SHA512_Init(&c);
-    SHA512_Update(&c, d, n);
-    SHA512_Final(md, &c);
-    OPENSSL_cleanse(&c, sizeof(c));
-    return md;
-}
-
 #ifndef SHA512_ASM
 static const SHA_LONG64 K512[80] = {
     U64(0x428a2f98d728ae22), U64(0x7137449123ef65cd),