Add KDF error codes

Reviewed-by: Rich Salz <rsalz@openssl.org>

4 files changed, 107 insertions, 6 deletions

diff --git a/crypto/kdf/Makefile.in b/crypto/kdf/Makefile.in
index be4e08c1a0..44d57622e0 100644
--- a/crypto/kdf/Makefile.in
+++ b/crypto/kdf/Makefile.in
@@ -15,8 +15,8 @@ CFLAGS= $(INCLUDES) $(CFLAG) $(SHARED_CFLAG)
 GENERAL=Makefile
 
 LIB=$(TOP)/libcrypto.a
-LIBSRC=tls1_prf.c
-LIBOBJ=tls1_prf.o
+LIBSRC=tls1_prf.c kdf_err.c
+LIBOBJ=tls1_prf.o kdf_err.o
 
 SRC= $(LIBSRC)
 
diff --git a/crypto/kdf/build.info b/crypto/kdf/build.info
index 8b6d9eed41..320f534055 100644
--- a/crypto/kdf/build.info
+++ b/crypto/kdf/build.info
@@ -1,3 +1,3 @@
 LIBS=../../libcrypto
 SOURCE[../../libcrypto]=\
-        tls1_prf.c
+        tls1_prf.c kdf_err.c
diff --git a/crypto/kdf/kdf_err.c b/crypto/kdf/kdf_err.c
new file mode 100644
index 0000000000..b0321c51bd
--- /dev/null
+++ b/crypto/kdf/kdf_err.c
@@ -0,0 +1,95 @@
+/* ====================================================================
+ * Copyright (c) 1999-2016 The OpenSSL Project.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * 3. All advertising materials mentioning features or use of this
+ *    software must display the following acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
+ *
+ * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
+ *    endorse or promote products derived from this software without
+ *    prior written permission. For written permission, please contact
+ *    openssl-core@OpenSSL.org.
+ *
+ * 5. Products derived from this software may not be called "OpenSSL"
+ *    nor may "OpenSSL" appear in their names without prior written
+ *    permission of the OpenSSL Project.
+ *
+ * 6. Redistributions of any form whatsoever must retain the following
+ *    acknowledgment:
+ *    "This product includes software developed by the OpenSSL Project
+ *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
+ * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
+ * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ====================================================================
+ *
+ * This product includes cryptographic software written by Eric Young
+ * (eay@cryptsoft.com).  This product includes software written by Tim
+ * Hudson (tjh@cryptsoft.com).
+ *
+ */
+
+/*
+ * NOTE: this file was auto generated by the mkerr.pl script: any changes
+ * made to it will be overwritten when the script next updates this file,
+ * only reason strings will be preserved.
+ */
+
+#include <stdio.h>
+#include <openssl/err.h>
+#include <openssl/kdf.h>
+
+/* BEGIN ERROR CODES */
+#ifndef OPENSSL_NO_ERR
+
+# define ERR_FUNC(func) ERR_PACK(ERR_LIB_KDF,func,0)
+# define ERR_REASON(reason) ERR_PACK(ERR_LIB_KDF,0,reason)
+
+static ERR_STRING_DATA KDF_str_functs[] = {
+    {ERR_FUNC(KDF_F_PKEY_TLS1_PRF_CTRL_STR), "pkey_tls1_prf_ctrl_str"},
+    {ERR_FUNC(KDF_F_PKEY_TLS1_PRF_DERIVE), "pkey_tls1_prf_derive"},
+    {0, NULL}
+};
+
+static ERR_STRING_DATA KDF_str_reasons[] = {
+    {ERR_REASON(KDF_R_INVALID_DIGEST), "invalid digest"},
+    {ERR_REASON(KDF_R_MISSING_PARAMETER), "missing parameter"},
+    {ERR_REASON(KDF_R_VALUE_MISSING), "value missing"},
+    {0, NULL}
+};
+
+#endif
+
+void ERR_load_KDF_strings(void)
+{
+#ifndef OPENSSL_NO_ERR
+
+    if (ERR_func_error_string(KDF_str_functs[0].error) == NULL) {
+        ERR_load_strings(0, KDF_str_functs);
+        ERR_load_strings(0, KDF_str_reasons);
+    }
+#endif
+}
diff --git a/crypto/kdf/tls1_prf.c b/crypto/kdf/tls1_prf.c
index 1302eb0927..4b40c88ce7 100644
--- a/crypto/kdf/tls1_prf.c
+++ b/crypto/kdf/tls1_prf.c
@@ -141,14 +141,18 @@ static int pkey_tls1_prf_ctrl(EVP_PKEY_CTX *ctx, int type, int p1, void *p2)
 static int pkey_tls1_prf_ctrl_str(EVP_PKEY_CTX *ctx,
                                   const char *type, const char *value)
 {
-    if (value == NULL)
+    if (value == NULL) {
+        KDFerr(KDF_F_PKEY_TLS1_PRF_CTRL_STR, KDF_R_VALUE_MISSING);
         return 0;
+    }
     if (strcmp(type, "md") == 0) {
         TLS1_PRF_PKEY_CTX *kctx = ctx->data;
 
         const EVP_MD *md = EVP_get_digestbyname(value);
-        if (md == NULL)
+        if (md == NULL) {
+            KDFerr(KDF_F_PKEY_TLS1_PRF_CTRL_STR, KDF_R_INVALID_DIGEST);
             return 0;
+        }
         kctx->md = md;
         return 1;
     }
@@ -167,8 +171,10 @@ static int pkey_tls1_prf_derive(EVP_PKEY_CTX *ctx, unsigned char *key,
                                 size_t *keylen)
 {
     TLS1_PRF_PKEY_CTX *kctx = ctx->data;
-    if (kctx->md == NULL || kctx->sec == NULL || kctx->seedlen == 0)
+    if (kctx->md == NULL || kctx->sec == NULL || kctx->seedlen == 0) {
+        KDFerr(KDF_F_PKEY_TLS1_PRF_DERIVE, KDF_R_MISSING_PARAMETER);
         return 0;
+    }
     return tls1_prf_alg(kctx->md, kctx->sec, kctx->seclen,
                         kctx->seed, kctx->seedlen,
                         key, *keylen);