zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/lib/libssl/openssl-1.1.1o/crypto/pem/pem_sign.c b/ap/lib/libssl/openssl-1.1.1o/crypto/pem/pem_sign.c
new file mode 100644
index 0000000..7e7b32e
--- /dev/null
+++ b/ap/lib/libssl/openssl-1.1.1o/crypto/pem/pem_sign.c
@@ -0,0 +1,50 @@
+/*
+ * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the OpenSSL license (the "License"). You may not use
+ * this file except in compliance with the License. You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stdio.h>
+#include "internal/cryptlib.h"
+#include <openssl/evp.h>
+#include <openssl/objects.h>
+#include <openssl/x509.h>
+#include <openssl/pem.h>
+
+int PEM_SignInit(EVP_MD_CTX *ctx, EVP_MD *type)
+{
+ return EVP_DigestInit_ex(ctx, type, NULL);
+}
+
+int PEM_SignUpdate(EVP_MD_CTX *ctx, unsigned char *data, unsigned int count)
+{
+ return EVP_DigestUpdate(ctx, data, count);
+}
+
+int PEM_SignFinal(EVP_MD_CTX *ctx, unsigned char *sigret,
+ unsigned int *siglen, EVP_PKEY *pkey)
+{
+ unsigned char *m;
+ int i, ret = 0;
+ unsigned int m_len;
+
+ m = OPENSSL_malloc(EVP_PKEY_size(pkey));
+ if (m == NULL) {
+ PEMerr(PEM_F_PEM_SIGNFINAL, ERR_R_MALLOC_FAILURE);
+ goto err;
+ }
+
+ if (EVP_SignFinal(ctx, m, &m_len, pkey) <= 0)
+ goto err;
+
+ i = EVP_EncodeBlock(sigret, m, m_len);
+ *siglen = i;
+ ret = 1;
+ err:
+ /* ctx has been zeroed by EVP_SignFinal() */
+ OPENSSL_free(m);
+ return ret;
+}