PHP ʖ²ἯTH º󍋼/A LXXII. OpenSSL functions ½鉜 This module uses the functions of OpenSSL for generation and verification of signatures and for sealing (encrypting) and opening (decrypting) data. OpenSSL offers many features that this module currently doesn't support. Some of these may be added in the future. Шdz In order to use the OpenSSL functions you need to install the OpenSSL package. PHP-4.0.4pl1 requires OpenSSL = 0.9.6, but PHP-4.0.5 and greater will also work with OpenSSL = 0.9.5. °²װ To use PHP's OpenSSL support you must also compile PHP --with-openssl[=DIR]. Note to Win32 Users: In order to enable this module on a Windows environment, you must copy libeay32.dll from the DLL folder of the PHP/Win32 binary package to the SYSTEM32 folder of your windows machine. (Ex: C:\WINNT\SYSTEM32 or C:\WINDOWS\SYSTEM32) Additionally, if you are planning to use the key generation and certificate signing functions, you will need to install a valid openssl.cnf on your system. As of PHP 4.3.0, we include a sample configuration file in the openssl of our win32 binary distribution. If you are using PHP 4.2.0 or later and are missing the file, you can obtain it from the OpenSSL home page or by downloading the PHP 4.3.0 release and using the configuration file from there. Note to Win32 Users: PHP will search for the openssl.cnf using the following logic: the OPENSSL_CONF environmental variable, if set, will be used as the path (including filename) of the configuration file. the SSLEAY_CONF environmental variable, if set, will be used as the path (including filename) of the configuration file. The file openssl.cnf will be assumed to be found in the default certificate area, as configured at the time that the openssl DLL was compiled. This is usually means that the default filename is c:\usr\local\ssl\openssl.cnf. In your installation, you need to decide whether to install the configuration file at c:\usr\local\ssl\openssl.cnf or whether to install it someplace else and use environmental variables (possibly on a per-virtual-host basis) to locate the configuration file. Note that it is possible to override the default path from the script using the configargs of the functions that require a configuration file. ԋАʱŤփ ¸À©չģ¿鎴¶¨ҥȎºΉ薃ָn¡£ ׊Դ Ѝ Key/Certificate parameters Quite a few of the openssl functions require a key or a certificate parameter. PHP 4.0.5 and earlier have to use a key or certificate resource returned by one of the openssl_get_xxx functions. Later versions may use one of the following methods: Certificates An X.509 resource returned from openssl_x509_read() A string having the format file://path/to/cert.pem; the named file must contain a PEM encoded certificate A string containing the content of a certificate, PEM encoded Public/Private Keys A key resource returned from openssl_get_publickey() or openssl_get_privatekey() For public keys only: an X.509 resource A string having the format file://path/to/file.pem - the named file must contain a PEM encoded certificate/private key (it may contain both) A string containing the content of a certificate/key, PEM encoded For private keys, you may also use the syntax array($key, $passphrase) where $key represents a key specified using the file:// or textual content notation above, and $passphrase represents a string containing the passphrase for that private key Certificate Verification When calling a function that will verify a signature/certificate, the cainfo parameter is an array containing file and directory names that specify the locations of trusted CA files. If a directory is specified, then it must be a correctly formed hashed directory as the openssl command would use. Ԥ¶¨ҥ³£ ӉӚբЩ³£ʇӉ¸À©չģ¿鶨ҥµģ¬Ҳ´˖»ӐԚ¸À©չģ¿鱻±ҫµ½ PHP ֐£¬»򕟔ڔːЊ±±»¶¯̬¼Ӕغ󣬕␩³£²œА§¡£ PKCS7 Flags/Constants The S/MIME functions make use of flags which are specified using a bitfield which can include one or more of the following values: Constant Description PKCS7_TEXT adds text/plain content type headers to encrypted/signed message. If decrypting or verifying, it strips those headers from the output - if the decrypted or verified message is not of MIME type text/plain then an error will occur. PKCS7_BINARY normally the input message is converted to "canonical" format which is effectively using CR and LF as end of line: as required by the S/MIME specification. When this options is present, no translation occurs. This is useful when handling binary data which may not be in MIME format. PKCS7_NOINTERN when verifying a message, certificates (if any) included in the message are normally searched for the signing certificate. With this option only the certificates specified in the extracerts parameter of openssl_pkcs7_verify() are used. The supplied certificates can still be used as untrusted CAs however. PKCS7_NOVERIFY do not verify the signers certificate of a signed message. PKCS7_NOCHAIN do not chain verification of signers certificates: that is don't use the certificates in the signed message as untrusted CAs. PKCS7_NOCERTS when signing a message the signer's certificate is normally included - with this option it is excluded. This will reduce the size of the signed message but the verifier must have a copy of the signers certificate available locally (passed using the extracerts to openssl_pkcs7_verify() for example. PKCS7_NOATTR normally when a message is signed, a set of attributes are included which include the signing time and the supported symmetric algorithms. With this option they are not included. PKCS7_DETACHED When signing a message, use cleartext signing with the MIME type multipart/signed. This is the default if the flags parameter to openssl_pkcs7_sign() if you do not specify any flags. If you turn this option off, the message will be signed using opaque signing, which is more resistant to translation by mail relays but cannot be read by mail agents that do not support S/MIME. PKCS7_NOSIGS Don't try and verify the signatures on a message ע: These constants were added in 4.0.6. Ŀ¼ openssl_csr_export_to_file -- Exports a CSR to a file openssl_csr_export -- Exports a CSR as a string openssl_csr_new -- Generates a CSR openssl_csr_sign -- Sign a CSR with another certificate (or itself) and generate a certificate openssl_error_string -- Return openSSL error message openssl_free_key -- Free key resource openssl_get_privatekey -- Get a private key openssl_get_publickey -- Extract public key from certificate and prepare it for use openssl_open -- Open sealed data openssl_pkcs7_decrypt -- Decrypts an S/MIME encrypted message openssl_pkcs7_encrypt -- Encrypt an S/MIME message openssl_pkcs7_sign -- sign an S/MIME message openssl_pkcs7_verify -- Verifies the signature of an S/MIME signed message openssl_pkey_export_to_file -- Gets an exportable representation of a key into a file openssl_pkey_export -- Gets an exportable representation of a key into a string openssl_pkey_get_private -- Get a private key openssl_pkey_get_public -- Extract public key from certificate and prepare it for use openssl_pkey_new -- Generates a new private key openssl_private_decrypt -- Decrypts data with private key openssl_private_encrypt -- Encrypts data with private key openssl_public_decrypt -- Decrypts data with public key openssl_public_encrypt -- Encrypts data with public key openssl_seal -- Seal (encrypt) data openssl_sign -- Generate signature openssl_verify -- Verify signature openssl_x509_check_private_key -- Checks if a private key corresponds to a certificate openssl_x509_checkpurpose -- Verifies if a certificate can be used for a particular purpose openssl_x509_export_to_file -- Exports a certificate to file openssl_x509_export -- Exports a certificate as a string openssl_x509_free -- Free certificate resource openssl_x509_parse -- Parse an X509 certificate and return the information as an array openssl_x509_read -- Parse an X.509 certificate and return a resource identifier for it º󍋼/A ưµ㼯A OCIWriteLobToFile ɏһ¼¶ openssl_csr_export_to_file