3 files changed, 19 insertions, 2 deletions
diff --git a/source4/heimdal/lib/hcrypto/evp-cc.c b/source4/heimdal/lib/hcrypto/evp-cc.c
index 1bf8ca8af9..15b3479f8e 100644
--- a/source4/heimdal/lib/hcrypto/evp-cc.c
+++ b/source4/heimdal/lib/hcrypto/evp-cc.c
@@ -296,6 +296,7 @@ EVP_cc_aes_256_cbc(void)
  *
  */
 
+#ifdef COMMONCRYPTO_SUPPORTS_RC2
 static int
 cc_rc2_cbc_init(EVP_CIPHER_CTX *ctx,
 		const unsigned char * key,
@@ -305,6 +306,7 @@ cc_rc2_cbc_init(EVP_CIPHER_CTX *ctx,
     struct cc_key *cc = ctx->cipher_data;
     return init_cc_key(encp, kCCAlgorithmRC2, key, ctx->cipher->key_len, iv, &cc->href);
 }
+#endif
 
 /**
  * The RC2 cipher type - common crypto
@@ -318,6 +320,7 @@ cc_rc2_cbc_init(EVP_CIPHER_CTX *ctx,
 const EVP_CIPHER *
 EVP_cc_rc2_cbc(void)
 {
+#ifdef COMMONCRYPTO_SUPPORTS_RC2
     static const EVP_CIPHER rc2_cbc = {
 	0,
 	kCCBlockSizeRC2,
@@ -334,6 +337,9 @@ EVP_cc_rc2_cbc(void)
 	NULL
     };
     return &rc2_cbc;
+#else
+    return NULL;
+#endif
 }
 
 /**
@@ -348,6 +354,7 @@ EVP_cc_rc2_cbc(void)
 const EVP_CIPHER *
 EVP_cc_rc2_40_cbc(void)
 {
+#ifdef COMMONCRYPTO_SUPPORTS_RC2
     static const EVP_CIPHER rc2_40_cbc = {
 	0,
 	kCCBlockSizeRC2,
@@ -364,6 +371,9 @@ EVP_cc_rc2_40_cbc(void)
 	NULL
     };
     return &rc2_40_cbc;
+#else
+    return NULL;
+#endif
 }
 
 
@@ -379,6 +389,7 @@ EVP_cc_rc2_40_cbc(void)
 const EVP_CIPHER *
 EVP_cc_rc2_64_cbc(void)
 {
+#ifdef COMMONCRYPTO_SUPPORTS_RC2
     static const EVP_CIPHER rc2_64_cbc = {
 	0,
 	kCCBlockSizeRC2,
@@ -395,6 +406,9 @@ EVP_cc_rc2_64_cbc(void)
 	NULL
     };
     return &rc2_64_cbc;
+#else
+    return NULL;
+#endif
 }
 
 /**
diff --git a/source4/heimdal/lib/hcrypto/hmac.c b/source4/heimdal/lib/hcrypto/hmac.c
index 282dc38113..dcd836d0be 100644
--- a/source4/heimdal/lib/hcrypto/hmac.c
+++ b/source4/heimdal/lib/hcrypto/hmac.c
@@ -121,7 +121,8 @@ HMAC_Init_ex(HMAC_CTX *ctx,
     for (i = 0, p = ctx->opad; i < keylen; i++)
 	p[i] ^= ((const unsigned char *)key)[i];
 
-    ctx->ctx = EVP_MD_CTX_create();
+    if (ctx->ctx == NULL)
+	ctx->ctx = EVP_MD_CTX_create();
 
     EVP_DigestInit_ex(ctx->ctx, ctx->md, ctx->engine);
     EVP_DigestUpdate(ctx->ctx, ctx->ipad, EVP_MD_block_size(ctx->md));
diff --git a/source4/heimdal/lib/hcrypto/rand-unix.c b/source4/heimdal/lib/hcrypto/rand-unix.c
index 2bfa265fa4..fcad39f1de 100644
--- a/source4/heimdal/lib/hcrypto/rand-unix.c
+++ b/source4/heimdal/lib/hcrypto/rand-unix.c
@@ -95,8 +95,10 @@ unix_bytes(unsigned char *outdata, int size)
     ssize_t count;
     int once = 0;
 
-    if (size <= 0)
+    if (size < 0)
 	return 0;
+    else if (size == 0)
+	return 1;
 
     HEIMDAL_MUTEX_lock(&random_mutex);
     if (random_fd == -1) {