1 files changed, 132 insertions, 0 deletions
diff --git a/programs/x509/req_app.c b/programs/x509/req_app.c
new file mode 100644
index 00000000000..fff0983f0e2
--- /dev/null
+++ b/programs/x509/req_app.c
@@ -0,0 +1,132 @@
+/*
+ *  Certificate request reading application
+ *
+ *  Copyright The Mbed TLS Contributors
+ *  SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later
+ */
+
+#include "mbedtls/build_info.h"
+
+#include "mbedtls/platform.h"
+
+#if !defined(MBEDTLS_BIGNUM_C) || !defined(MBEDTLS_RSA_C) ||  \
+    !defined(MBEDTLS_X509_CSR_PARSE_C) || !defined(MBEDTLS_FS_IO) || \
+    defined(MBEDTLS_X509_REMOVE_INFO)
+int main(void)
+{
+    mbedtls_printf("MBEDTLS_BIGNUM_C and/or MBEDTLS_RSA_C and/or "
+                   "MBEDTLS_X509_CSR_PARSE_C and/or MBEDTLS_FS_IO not defined and/or "
+                   "MBEDTLS_X509_REMOVE_INFO defined.\n");
+    mbedtls_exit(0);
+}
+#else
+
+#include "mbedtls/x509_csr.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define DFL_FILENAME            "cert.req"
+#define DFL_DEBUG_LEVEL         0
+
+#define USAGE \
+    "\n usage: req_app param=<>...\n"                   \
+    "\n acceptable parameters:\n"                       \
+    "    filename=%%s         default: cert.req\n"      \
+    "\n"
+
+
+/*
+ * global options
+ */
+struct options {
+    const char *filename;       /* filename of the certificate request  */
+} opt;
+
+int main(int argc, char *argv[])
+{
+    int ret = 1;
+    int exit_code = MBEDTLS_EXIT_FAILURE;
+    unsigned char buf[100000];
+    mbedtls_x509_csr csr;
+    int i;
+    char *p, *q;
+
+    /*
+     * Set to sane values
+     */
+    mbedtls_x509_csr_init(&csr);
+
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    psa_status_t status = psa_crypto_init();
+    if (status != PSA_SUCCESS) {
+        mbedtls_fprintf(stderr, "Failed to initialize PSA Crypto implementation: %d\n",
+                        (int) status);
+        goto exit;
+    }
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+
+    if (argc < 2) {
+usage:
+        mbedtls_printf(USAGE);
+        goto exit;
+    }
+
+    opt.filename            = DFL_FILENAME;
+
+    for (i = 1; i < argc; i++) {
+        p = argv[i];
+        if ((q = strchr(p, '=')) == NULL) {
+            goto usage;
+        }
+        *q++ = '\0';
+
+        if (strcmp(p, "filename") == 0) {
+            opt.filename = q;
+        } else {
+            goto usage;
+        }
+    }
+
+    /*
+     * 1.1. Load the CSR
+     */
+    mbedtls_printf("\n  . Loading the CSR ...");
+    fflush(stdout);
+
+    ret = mbedtls_x509_csr_parse_file(&csr, opt.filename);
+
+    if (ret != 0) {
+        mbedtls_printf(" failed\n  !  mbedtls_x509_csr_parse_file returned %d\n\n", ret);
+        mbedtls_x509_csr_free(&csr);
+        goto exit;
+    }
+
+    mbedtls_printf(" ok\n");
+
+    /*
+     * 1.2 Print the CSR
+     */
+    mbedtls_printf("  . CSR information    ...\n");
+    ret = mbedtls_x509_csr_info((char *) buf, sizeof(buf) - 1, "      ", &csr);
+    if (ret == -1) {
+        mbedtls_printf(" failed\n  !  mbedtls_x509_csr_info returned %d\n\n", ret);
+        mbedtls_x509_csr_free(&csr);
+        goto exit;
+    }
+
+    mbedtls_printf("%s\n", buf);
+
+    exit_code = MBEDTLS_EXIT_SUCCESS;
+
+exit:
+    mbedtls_x509_csr_free(&csr);
+#if defined(MBEDTLS_USE_PSA_CRYPTO)
+    mbedtls_psa_crypto_free();
+#endif /* MBEDTLS_USE_PSA_CRYPTO */
+
+    mbedtls_exit(exit_code);
+}
+#endif /* MBEDTLS_BIGNUM_C && MBEDTLS_RSA_C && MBEDTLS_X509_CSR_PARSE_C &&
+          MBEDTLS_FS_IO */