openssl_cms_encrypt Encrypt a CMS message &reftitle.description; boolopenssl_cms_encrypt stringinput_filename stringoutput_filename OpenSSLCertificatearraystringcertificate arraynullheaders intflags0 intencodingOPENSSL_ENCODING_SMIME intcipher_algoOPENSSL_CIPHER_AES_128_CBC This function encrypts content to one or more recipients, based on the certificates that are passed to it. &reftitle.parameters; input_filename The file to be encrypted. output_filename The output file. certificate Recipients to encrypt to. headers Headers to include when S/MIME is used. flags Flags to be passed to CMS_sign. encoding An encoding to output. One of OPENSSL_ENCODING_SMIME, OPENSSL_ENCODING_DER or OPENSSL_ENCODING_PEM. cipher_algo A cypher to use. &reftitle.returnvalues; &return.success; &reftitle.changelog; &Version; &Description; 8.1.0 The default cipher algorithm (cipher_algo) is now AES-128-CBC (OPENSSL_CIPHER_AES_128_CBC). Previously, PKCS7/CMS was used (OPENSSL_CIPHER_RC2_40).