first commit

2026-09-13 22:18:11 +01:00
commit 08c03ac533
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+/*
+ *  Error message information
+ *
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include "common.h"
+
+#include "mbedtls/error.h"
+
+#if defined(MBEDTLS_ERROR_C) || defined(MBEDTLS_ERROR_STRERROR_DUMMY)
+
+#if defined(MBEDTLS_ERROR_C)
+
+#if defined(MBEDTLS_PLATFORM_C)
+#include "mbedtls/platform.h"
+#else
+#define mbedtls_snprintf snprintf
+#endif
+
+#include <stdio.h>
+#include <string.h>
+
+HEADER_INCLUDED
+
+const char * mbedtls_high_level_strerr( int error_code )
+{
+    int high_level_error_code;
+
+    if( error_code < 0 )
+        error_code = -error_code;
+
+    /* Extract the high-level part from the error code. */
+    high_level_error_code = error_code & 0xFF80;
+
+    switch( high_level_error_code )
+    {
+        /* Begin Auto-Generated Code. */
+HIGH_LEVEL_CODE_CHECKS
+        /* End Auto-Generated Code. */
+
+        default:
+            break;
+    }
+
+    return( NULL );
+}
+
+const char * mbedtls_low_level_strerr( int error_code )
+{
+    int low_level_error_code;
+
+    if( error_code < 0 )
+        error_code = -error_code;
+
+    /* Extract the low-level part from the error code. */
+    low_level_error_code = error_code & ~0xFF80;
+
+    switch( low_level_error_code )
+    {
+        /* Begin Auto-Generated Code. */
+LOW_LEVEL_CODE_CHECKS
+        /* End Auto-Generated Code. */
+
+        default:
+            break;
+    }
+
+    return( NULL );
+}
+
+void mbedtls_strerror( int ret, char *buf, size_t buflen )
+{
+    size_t len;
+    int use_ret;
+    const char * high_level_error_description = NULL;
+    const char * low_level_error_description = NULL;
+
+    if( buflen == 0 )
+        return;
+
+    memset( buf, 0x00, buflen );
+
+    if( ret < 0 )
+        ret = -ret;
+
+    if( ret & 0xFF80 )
+    {
+        use_ret = ret & 0xFF80;
+
+        // Translate high level error code.
+        high_level_error_description = mbedtls_high_level_strerr( ret );
+
+        if( high_level_error_description == NULL )
+            mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", (unsigned int) use_ret );
+        else
+            mbedtls_snprintf( buf, buflen, "%s", high_level_error_description );
+
+#if defined(MBEDTLS_SSL_TLS_C)
+        // Early return in case of a fatal error - do not try to translate low
+        // level code.
+        if(use_ret == -(MBEDTLS_ERR_SSL_FATAL_ALERT_MESSAGE))
+            return;
+#endif /* MBEDTLS_SSL_TLS_C */
+    }
+
+    use_ret = ret & ~0xFF80;
+
+    if( use_ret == 0 )
+        return;
+
+    // If high level code is present, make a concatenation between both
+    // error strings.
+    //
+    len = strlen( buf );
+
+    if( len > 0 )
+    {
+        if( buflen - len < 5 )
+            return;
+
+        mbedtls_snprintf( buf + len, buflen - len, " : " );
+
+        buf += len + 3;
+        buflen -= len + 3;
+    }
+
+    // Translate low level error code.
+    low_level_error_description = mbedtls_low_level_strerr( ret );
+
+    if( low_level_error_description == NULL )
+        mbedtls_snprintf( buf, buflen, "UNKNOWN ERROR CODE (%04X)", (unsigned int) use_ret );
+    else
+        mbedtls_snprintf( buf, buflen, "%s", low_level_error_description );
+}
+
+#else /* MBEDTLS_ERROR_C */
+
+/*
+ * Provide an non-function in case MBEDTLS_ERROR_C is not defined
+ */
+void mbedtls_strerror( int ret, char *buf, size_t buflen )
+{
+    ((void) ret);
+
+    if( buflen > 0 )
+        buf[0] = '\0';
+}
+
+#endif /* MBEDTLS_ERROR_C */
+
+#endif /* MBEDTLS_ERROR_C || MBEDTLS_ERROR_STRERROR_DUMMY */