| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | =pod | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =head1 NAME | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | provider-mac - The mac library E<lt>-E<gt> provider functions | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =head1 SYNOPSIS | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-09-29 23:10:59 +08:00
										 |  |  | =for openssl multiple includes | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:21:19 +08:00
										 |  |  |  #include <openssl/core_dispatch.h> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  |  #include <openssl/core_names.h> | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |  /* | 
					
						
							|  |  |  |   * None of these are actual functions, but are displayed like this for | 
					
						
							|  |  |  |   * the function signatures for functions that are offered as function | 
					
						
							|  |  |  |   * pointers in OSSL_DISPATCH arrays. | 
					
						
							|  |  |  |   */ | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |  /* Context management */ | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  |  void *OSSL_FUNC_mac_newctx(void *provctx); | 
					
						
							|  |  |  |  void OSSL_FUNC_mac_freectx(void *mctx); | 
					
						
							|  |  |  |  void *OSSL_FUNC_mac_dupctx(void *src); | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  |  /* Encryption/decryption */ | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  |  int OSSL_FUNC_mac_init(void *mctx); | 
					
						
							|  |  |  |  int OSSL_FUNC_mac_update(void *mctx, const unsigned char *in, size_t inl); | 
					
						
							|  |  |  |  int OSSL_FUNC_mac_final(void *mctx, unsigned char *out, size_t *outl, size_t outsize); | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  |  /* MAC parameter descriptors */ | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  |  const OSSL_PARAM *OSSL_FUNC_mac_get_params(void); | 
					
						
							|  |  |  |  const OSSL_PARAM *OSSL_FUNC_mac_get_ctx_params(void); | 
					
						
							|  |  |  |  const OSSL_PARAM *OSSL_FUNC_mac_set_ctx_params(void); | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  |  /* MAC parameters */ | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  |  int OSSL_FUNC_mac_get_params(OSSL_PARAM params[]); | 
					
						
							|  |  |  |  int OSSL_FUNC_mac_get_ctx_params(void *mctx, OSSL_PARAM params[]); | 
					
						
							|  |  |  |  int OSSL_FUNC_mac_set_ctx_params(void *mctx, const OSSL_PARAM params[]); | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | =head1 DESCRIPTION | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | This documentation is primarily aimed at provider authors. See L<provider(7)> | 
					
						
							|  |  |  | for further information. | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | The MAC operation enables providers to implement mac algorithms and make | 
					
						
							|  |  |  | them available to applications via the API functions L<EVP_MAC_init(3)>, | 
					
						
							| 
									
										
										
										
											2019-10-06 02:03:57 +08:00
										 |  |  | L<EVP_MAC_update(3)> and L<EVP_MAC_final(3)>. | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | All "functions" mentioned here are passed as function pointers between | 
					
						
							|  |  |  | F<libcrypto> and the provider in B<OSSL_DISPATCH> arrays via | 
					
						
							|  |  |  | B<OSSL_ALGORITHM> arrays that are returned by the provider's | 
					
						
							|  |  |  | provider_query_operation() function | 
					
						
							|  |  |  | (see L<provider-base(7)/Provider Functions>). | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | All these "functions" have a corresponding function type definition | 
					
						
							|  |  |  | named B<OSSL_{name}_fn>, and a helper function to retrieve the | 
					
						
							|  |  |  | function pointer from an B<OSSL_DISPATCH> element named | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | B<OSSL_FUNC_{name}>. | 
					
						
							|  |  |  | For example, the "function" OSSL_FUNC_mac_newctx() has these: | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  |  typedef void *(OSSL_OSSL_FUNC_mac_newctx_fn)(void *provctx); | 
					
						
							|  |  |  |  static ossl_inline OSSL_OSSL_FUNC_mac_newctx_fn | 
					
						
							|  |  |  |      OSSL_FUNC_mac_newctx(const OSSL_DISPATCH *opf); | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | B<OSSL_DISPATCH> arrays are indexed by numbers that are provided as | 
					
						
							| 
									
										
										
										
											2020-06-21 07:21:19 +08:00
										 |  |  | macros in L<openssl-core_dispatch.h(7)>, as follows: | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  |  OSSL_FUNC_mac_newctx               OSSL_FUNC_MAC_NEWCTX | 
					
						
							|  |  |  |  OSSL_FUNC_mac_freectx              OSSL_FUNC_MAC_FREECTX | 
					
						
							|  |  |  |  OSSL_FUNC_mac_dupctx               OSSL_FUNC_MAC_DUPCTX | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  |  OSSL_FUNC_mac_init                 OSSL_FUNC_MAC_INIT | 
					
						
							|  |  |  |  OSSL_FUNC_mac_update               OSSL_FUNC_MAC_UPDATE | 
					
						
							|  |  |  |  OSSL_FUNC_mac_final                OSSL_FUNC_MAC_FINAL | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  |  OSSL_FUNC_mac_get_params           OSSL_FUNC_MAC_GET_PARAMS | 
					
						
							|  |  |  |  OSSL_FUNC_mac_get_ctx_params       OSSL_FUNC_MAC_GET_CTX_PARAMS | 
					
						
							|  |  |  |  OSSL_FUNC_mac_set_ctx_params       OSSL_FUNC_MAC_SET_CTX_PARAMS | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  |  OSSL_FUNC_mac_gettable_params      OSSL_FUNC_MAC_GETTABLE_PARAMS | 
					
						
							|  |  |  |  OSSL_FUNC_mac_gettable_ctx_params  OSSL_FUNC_MAC_GETTABLE_CTX_PARAMS | 
					
						
							|  |  |  |  OSSL_FUNC_mac_settable_ctx_params  OSSL_FUNC_MAC_SETTABLE_CTX_PARAMS | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | A mac algorithm implementation may not implement all of these functions. | 
					
						
							|  |  |  | In order to be a consistent set of functions, at least the following functions | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | must be implemented: OSSL_FUNC_mac_newctx(), OSSL_FUNC_mac_freectx(), OSSL_FUNC_mac_init(), | 
					
						
							|  |  |  | OSSL_FUNC_mac_update(), OSSL_FUNC_mac_final(). | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | All other functions are optional. | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =head2 Context Management Functions | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_newctx() should create and return a pointer to a provider side | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | structure for holding context information during a mac operation. | 
					
						
							|  |  |  | A pointer to this context will be passed back in a number of the other mac | 
					
						
							|  |  |  | operation function calls. | 
					
						
							| 
									
										
										
										
											2019-12-01 07:18:47 +08:00
										 |  |  | The parameter I<provctx> is the provider context generated during provider | 
					
						
							| 
									
										
										
										
											2019-08-22 13:21:25 +08:00
										 |  |  | initialisation (see L<provider(7)>). | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_freectx() is passed a pointer to the provider side mac context in | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | the I<mctx> parameter. | 
					
						
							|  |  |  | If it receives NULL as I<mctx> value, it should not do anything other than | 
					
						
							|  |  |  | return. | 
					
						
							|  |  |  | This function should free any resources associated with that context. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_dupctx() should duplicate the provider side mac context in the | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | I<mctx> parameter and return the duplicate copy. | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =head2 Encryption/Decryption Functions | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_init() initialises a mac operation given a newly created provider | 
					
						
							| 
									
										
										
										
											2019-12-01 07:18:47 +08:00
										 |  |  | side mac context in the I<mctx> parameter. | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_update() is called to supply data for MAC computation of a previously | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | initialised mac operation. | 
					
						
							|  |  |  | The I<mctx> parameter contains a pointer to a previously initialised provider | 
					
						
							|  |  |  | side context. | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_update() may be called multiple times for a single mac operation. | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_final() completes the MAC computation started through previous | 
					
						
							|  |  |  | OSSL_FUNC_mac_init() and OSSL_FUNC_mac_update() calls. | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | The I<mctx> parameter contains a pointer to the provider side context. | 
					
						
							|  |  |  | The resulting MAC should be written to I<out> and the amount of data written | 
					
						
							|  |  |  | to I<*outl>, which should not exceed I<outsize> bytes. | 
					
						
							|  |  |  | The same expectations apply to I<outsize> as documented for | 
					
						
							|  |  |  | L<EVP_MAC_final(3)>. | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =head2 Mac Parameters | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | See L<OSSL_PARAM(3)> for further details on the parameters structure used by | 
					
						
							|  |  |  | these functions. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_get_params() gets details of parameter values associated with the | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | provider algorithm and stores them in I<params>. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_set_ctx_params() sets mac parameters associated with the given | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | provider side mac context I<mctx> to I<params>. | 
					
						
							|  |  |  | Any parameter settings are additional to any that were previously set. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_get_ctx_params() gets details of currently set parameter values | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | associated with the given provider side mac context I<mctx> and stores them | 
					
						
							|  |  |  | in I<params>. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_gettable_params(), OSSL_FUNC_mac_gettable_ctx_params(), and | 
					
						
							|  |  |  | OSSL_FUNC_mac_settable_ctx_params() all return constant B<OSSL_PARAM> arrays | 
					
						
							|  |  |  | as descriptors of the parameters that OSSL_FUNC_mac_get_params(), | 
					
						
							|  |  |  | OSSL_FUNC_mac_get_ctx_params(), and OSSL_FUNC_mac_set_ctx_params() can handle, | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | respectively. | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | Parameters currently recognised by built-in macs are as follows. Not all | 
					
						
							|  |  |  | parameters are relevant to, or are understood by all macs: | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =over 4 | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-09-10 16:05:57 +08:00
										 |  |  | =item "key" (B<OSSL_MAC_PARAM_KEY>) <octet string> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | Sets the key in the associated MAC ctx. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-09-10 16:05:57 +08:00
										 |  |  | =item "iv" (B<OSSL_MAC_PARAM_IV>) <octet string> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | Sets the IV of the underlying cipher, when applicable. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-09-10 16:05:57 +08:00
										 |  |  | =item "custom" (B<OSSL_MAC_PARAM_CUSTOM>) <UTF8 string> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | Sets the custom string in the associated MAC ctx. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-09-10 16:05:57 +08:00
										 |  |  | =item "salt" (B<OSSL_MAC_PARAM_SALT>) <octet string> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | Sets the salt of the underlying cipher, when applicable. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-09-10 16:05:57 +08:00
										 |  |  | =item "xof" (B<OSSL_MAC_PARAM_BLOCK_XOF>) <integer> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | Sets XOF mode in the associated MAC ctx. | 
					
						
							|  |  |  | 0 means no XOF mode, 1 means XOF mode. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-09-10 16:05:57 +08:00
										 |  |  | =item "flags" (B<OSSL_MAC_PARAM_FLAGS>) <integer> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | Gets flags associated with the MAC. | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =for comment We need to investigate if this is the right approach | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-09-10 16:05:57 +08:00
										 |  |  | =item "cipher" (B<OSSL_MAC_PARAM_CIPHER>) <UTF8 string> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-09-10 16:05:57 +08:00
										 |  |  | =item "digest" (B<OSSL_MAC_PARAM_DIGEST>) <UTF8 string> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-08-22 18:50:00 +08:00
										 |  |  | Sets the name of the underlying cipher or digest to be used. | 
					
						
							|  |  |  | It must name a suitable algorithm for the MAC that's being used. | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-09-10 16:05:57 +08:00
										 |  |  | =item "properties" (B<OSSL_MAC_PARAM_PROPERTIES>) <UTF8 string> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | Sets the properties to be queried when trying to fetch the underlying algorithm. | 
					
						
							|  |  |  | This must be given together with the algorithm naming parameter to be | 
					
						
							|  |  |  | considered valid. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-09-10 16:05:57 +08:00
										 |  |  | =item "size" (B<OSSL_MAC_PARAM_SIZE>) <integer> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-08-22 18:50:00 +08:00
										 |  |  | Can be used to get the resulting MAC size. | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2019-08-22 18:50:00 +08:00
										 |  |  | With some MAC algorithms, it can also be used to set the size that the | 
					
						
							|  |  |  | resulting MAC should have. | 
					
						
							|  |  |  | Allowable sizes are decided within each implementation. | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | =back | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =head1 RETURN VALUES | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_newctx() and OSSL_FUNC_mac_dupctx() should return the newly created | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | provider side mac context, or NULL on failure. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_init(), OSSL_FUNC_mac_update(), OSSL_FUNC_mac_final(), OSSL_FUNC_mac_get_params(), | 
					
						
							|  |  |  | OSSL_FUNC_mac_get_ctx_params() and OSSL_FUNC_mac_set_ctx_params() should return 1 for | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | success or 0 on error. | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-21 07:19:16 +08:00
										 |  |  | OSSL_FUNC_mac_gettable_params(), OSSL_FUNC_mac_gettable_ctx_params() and | 
					
						
							|  |  |  | OSSL_FUNC_mac_settable_ctx_params() should return a constant B<OSSL_PARAM> | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | array, or NULL if none is offered. | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =head1 SEE ALSO | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | L<provider(7)> | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =head1 HISTORY | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | The provider MAC interface was introduced in OpenSSL 3.0. | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =head1 COPYRIGHT | 
					
						
							|  |  |  | 
 | 
					
						
							| 
									
										
										
										
											2020-06-25 21:13:12 +08:00
										 |  |  | Copyright 2019-2020 The OpenSSL Project Authors. All Rights Reserved. | 
					
						
							| 
									
										
										
										
											2019-05-07 18:39:58 +08:00
										 |  |  | 
 | 
					
						
							|  |  |  | Licensed under the Apache License 2.0 (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 | 
					
						
							|  |  |  | L<https://www.openssl.org/source/license.html>. | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | =cut |