Wrap <CommonCrypto/CommonDigest.h> with ifdef since it doesn't exists on Tiger

lib/hcrypto/evp-cc.c

@@ -45,7 +45,9 @@
 #include <string.h>
 #include <assert.h>
 
+#ifdef HAVE_COMMONCRYPTO_COMMONDIGEST_H
 #include <CommonCrypto/CommonDigest.h>
+#endif
 #include <CommonCrypto/CommonCryptor.h>
 
 #include <evp.h>
@@ -422,6 +424,7 @@ EVP_cc_rc2_64_cbc(void)
 const EVP_MD *
 EVP_cc_md2(void)
 {
+#ifdef HAVE_COMMONCRYPTO_COMMONDIGEST_H
     static const struct hc_evp_md md2 = {
 	CC_MD2_DIGEST_LENGTH,
 	CC_MD2_BLOCK_BYTES,
@@ -432,6 +435,9 @@ EVP_cc_md2(void)
 	(hc_evp_md_cleanup)NULL
     };
     return &md2;
+#else
+    return NULL;
+#endif
 }
 
 /**
@@ -443,6 +449,7 @@ EVP_cc_md2(void)
 const EVP_MD *
 EVP_cc_md4(void)
 {
+#ifdef HAVE_COMMONCRYPTO_COMMONDIGEST_H
     static const struct hc_evp_md md4 = {
 	CC_MD4_DIGEST_LENGTH,
 	CC_MD4_BLOCK_BYTES,
@@ -453,6 +460,9 @@ EVP_cc_md4(void)
 	(hc_evp_md_cleanup)NULL
     };
     return &md4;
+#else
+    return NULL;
+#endif
 }
 
 /**
@@ -464,6 +474,7 @@ EVP_cc_md4(void)
 const EVP_MD *
 EVP_cc_md5(void)
 {
+#ifdef HAVE_COMMONCRYPTO_COMMONDIGEST_H
     static const struct hc_evp_md md5 = {
 	CC_MD5_DIGEST_LENGTH,
 	CC_MD5_BLOCK_BYTES,
@@ -474,6 +485,9 @@ EVP_cc_md5(void)
 	(hc_evp_md_cleanup)NULL
     };
     return &md5;
+#else
+    return NULL;
+#endif
 }
 
 /**
@@ -485,6 +499,7 @@ EVP_cc_md5(void)
 const EVP_MD *
 EVP_cc_sha1(void)
 {
+#ifdef HAVE_COMMONCRYPTO_COMMONDIGEST_H
     static const struct hc_evp_md sha1 = {
 	CC_SHA1_DIGEST_LENGTH,
 	CC_SHA1_BLOCK_BYTES,
@@ -495,6 +510,9 @@ EVP_cc_sha1(void)
 	(hc_evp_md_cleanup)NULL
     };
     return &sha1;
+#else
+    return NULL;
+#endif
 }
 
 /**
@@ -506,6 +524,7 @@ EVP_cc_sha1(void)
 const EVP_MD *
 EVP_cc_sha256(void)
 {
+#ifdef HAVE_COMMONCRYPTO_COMMONDIGEST_H
     static const struct hc_evp_md sha256 = {
 	CC_SHA256_DIGEST_LENGTH,
 	CC_SHA256_BLOCK_BYTES,
@@ -516,6 +535,9 @@ EVP_cc_sha256(void)
 	(hc_evp_md_cleanup)NULL
     };
     return &sha256;
+#else
+    return NULL;
+#endif
 }
 
 /**