[openssl] openssl-3.0 update

[matthias.st.pierre at ncp-e.com]

The branch openssl-3.0 has been updated
       via  18e046c8a2e562cf947aa2b5b4cce31bb0ff75a1 (commit)
      from  6ff03e39189b4b1767157d1e1035365036f4f907 (commit)


- Log -----------------------------------------------------------------
commit 18e046c8a2e562cf947aa2b5b4cce31bb0ff75a1
Author: yangyangtiantianlonglong <yangtianlong1224 at 163.com>
Date:   Wed Feb 16 23:33:17 2022 +0800

    doc: Refactored the example in crypto.pod
    
    Added return value and error code in the sample
    
    Reviewed-by: Tomas Mraz <tomas at openssl.org>
    Reviewed-by: Tim Hudson <tjh at openssl.org>
    (Merged from https://github.com/openssl/openssl/pull/17721)
    
    (cherry picked from commit 4a4f446008938775c2bea3001c4c8e7a674992ad)

-----------------------------------------------------------------------

Summary of changes:
 doc/man7/crypto.pod | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/doc/man7/crypto.pod b/doc/man7/crypto.pod
index 2b09ad8903..a0cdca4fb3 100644
--- a/doc/man7/crypto.pod
+++ b/doc/man7/crypto.pod
@@ -380,6 +380,7 @@ encryption/decryption, signatures, message authentication codes, etc.
  #include <stdio.h>
  #include <openssl/evp.h>
  #include <openssl/bio.h>
+ #include <openssl/err.h>
 
  int main(void)
  {
@@ -390,6 +391,7 @@ encryption/decryption, signatures, message authentication codes, etc.
      };
      unsigned int len = 0;
      unsigned char *outdigest = NULL;
+     int ret = 1;
 
      /* Create a context for the digest operation */
      ctx = EVP_MD_CTX_new();
@@ -430,11 +432,16 @@ encryption/decryption, signatures, message authentication codes, etc.
      /* Print out the digest result */
      BIO_dump_fp(stdout, outdigest, len);
 
+     ret = 0;
+
   err:
      /* Clean up all the resources we allocated */
      OPENSSL_free(outdigest);
      EVP_MD_free(sha256);
      EVP_MD_CTX_free(ctx);
+     if (ret != 0)
+        ERR_print_errors_fp(stderr);
+     return ret;
  }
 
 =head1 CONFIGURATION