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421 lines
16 KiB
421 lines
16 KiB
9 years ago
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/*
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* Copyright (c) 2006-2012 Apple Inc. All Rights Reserved.
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*/
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/*
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* CMSEncoder.h - encode, sign, and/or encrypt messages in the Cryptographic
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* Message Syntax (CMS), per RFC 3852.
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*
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* A CMS message can be signed, encrypted, or both. A message can be signed by
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* an arbitrary number of signers; in this module, signers are expressed as
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* SecIdentityRefs. A message can be encrypted for an arbitrary number of
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* recipients; recipients are expressed here as SecCertificateRefs.
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*
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* In CMS terminology, this module performs encryption using the EnvelopedData
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* ContentType and signing using the SignedData ContentType.
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*
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* If the message is both signed and encrypted, it uses "nested ContentInfos"
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* in CMS terminology; in this implementation, signed & encrypted messages
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* are implemented as an EnvelopedData containing a SignedData.
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*/
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#ifndef _CMS_ENCODER_H_
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#define _CMS_ENCODER_H_
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#include <CoreFoundation/CoreFoundation.h>
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#include <Security/cssmtype.h>
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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CF_ASSUME_NONNULL_BEGIN
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/*
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* Opaque reference to a CMS encoder object.
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* This is a CF object, with standard CF semantics; dispose of it
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* with CFRelease().
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*/
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typedef struct CF_BRIDGED_TYPE(id) _CMSEncoder *CMSEncoderRef;
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CFTypeID CMSEncoderGetTypeID(void)
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Create a CMSEncoder. Result must eventually be freed via CFRelease().
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*/
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OSStatus CMSEncoderCreate(
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CMSEncoderRef * __nonnull CF_RETURNS_RETAINED cmsEncoderOut) /* RETURNED */
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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extern const CFStringRef kCMSEncoderDigestAlgorithmSHA1;
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extern const CFStringRef kCMSEncoderDigestAlgorithmSHA256;
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OSStatus CMSEncoderSetSignerAlgorithm(
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CMSEncoderRef cmsEncoder,
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CFStringRef digestAlgorithm)
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__OSX_AVAILABLE_STARTING(__MAC_10_11, __IPHONE_NA);
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/*
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* Specify signers of the CMS message; implies that the message will be signed.
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*
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* -- Caller can pass in one signer, as a SecIdentityRef, or an array of
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* signers, as a CFArray of SecIdentityRefs.
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* -- Can be called multiple times.
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* -- If the message is not to be signed, don't call this.
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* -- If this is called, it must be called before the first call to
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* CMSEncoderUpdateContent().
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*/
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OSStatus CMSEncoderAddSigners(
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CMSEncoderRef cmsEncoder,
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CFTypeRef signerOrArray)
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Obtain an array of signers as specified in CMSEncoderSetSigners().
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* Returns a NULL signers array if CMSEncoderSetSigners() has not been called.
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* Caller must CFRelease the result.
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*/
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OSStatus CMSEncoderCopySigners(
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CMSEncoderRef cmsEncoder,
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CFArrayRef * __nonnull CF_RETURNS_RETAINED signersOut) /* RETURNED */
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Specify recipients of the message. Implies that the message will
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* be encrypted.
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*
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* -- Caller can pass in one recipient, as a SecCertificateRef, or an
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* array of recipients, as a CFArray of SecCertificateRefs.
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* -- Can be called multiple times.
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* -- If the message is not to be encrypted, don't call this.
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* -- If this is called, it must be called before the first call to
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* CMSEncoderUpdateContent().
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*/
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OSStatus CMSEncoderAddRecipients(
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CMSEncoderRef cmsEncoder,
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CFTypeRef recipientOrArray)
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Obtain an array of recipients as specified in CMSEncoderSetRecipients().
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* Returns a NULL recipients array if CMSEncoderSetRecipients() has not been
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* called.
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* Caller must CFRelease the result.
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*/
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OSStatus CMSEncoderCopyRecipients(
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CMSEncoderRef cmsEncoder,
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CFArrayRef * __nonnull CF_RETURNS_RETAINED recipientsOut) /* RETURNED */
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* A signed message optionally includes the data to be signed. If the message
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* is *not* to include the data to be signed, call this function with a value
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* of TRUE for detachedContent. The default, if this function is not called,
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* is detachedContent=FALSE, i.e., the message contains the data to be signed.
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*
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* -- Encrypted messages can not use detached content. (This restriction
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* also applies to messages that are both signed and encrypted.)
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* -- If this is called, it must be called before the first call to
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* CMSEncoderUpdateContent().
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*/
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OSStatus CMSEncoderSetHasDetachedContent(
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CMSEncoderRef cmsEncoder,
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Boolean detachedContent)
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Obtain a Boolean indicating whether the current message will have detached
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* content.
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* Returns the value specified in CMSEncoderHasDetachedContent() if that
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* function has been called; else returns the default FALSE.
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*/
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OSStatus CMSEncoderGetHasDetachedContent(
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CMSEncoderRef cmsEncoder,
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Boolean *detachedContentOut) /* RETURNED */
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Optionally specify an eContentType OID for the inner EncapsulatedData for
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* a signed message. The default eContentType, used if this function is not
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* called, is id-data (which is the normal eContentType for applications such
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* as SMIME).
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*
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* If this is called, it must be called before the first call to
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* CMSEncoderUpdateContent().
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*
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* NOTE: This function is deprecated in Mac OS X 10.7 and later;
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* please use CMSEncoderSetEncapsulatedContentTypeOID() instead.
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*/
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OSStatus CMSEncoderSetEncapsulatedContentType(
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CMSEncoderRef cmsEncoder,
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const CSSM_OID *eContentType)
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/* DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER; */
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Optionally specify an eContentType OID for the inner EncapsulatedData for
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* a signed message. The default eContentTypeOID, used if this function is not
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* called, is id-data (which is the normal eContentType for applications such
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* as SMIME).
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*
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* The eContentTypeOID parameter may be specified as a CF string, e.g.:
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* CFSTR("1.2.840.113549.1.7.1")
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*
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* If this is called, it must be called before the first call to
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* CMSEncoderUpdateContent().
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*/
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OSStatus CMSEncoderSetEncapsulatedContentTypeOID(
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CMSEncoderRef cmsEncoder,
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CFTypeRef eContentTypeOID)
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__OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_NA);
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/*
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* Obtain the eContentType OID specified in CMSEncoderSetEncapsulatedContentType().
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* If CMSEncoderSetEncapsulatedContentType() has not been called this returns a
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* NULL pointer.
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* The returned OID's data is in the same format as the data provided to
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* CMSEncoderSetEncapsulatedContentType;, i.e., it's the encoded content of
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* the OID, not including the tag and length bytes.
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*/
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OSStatus CMSEncoderCopyEncapsulatedContentType(
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CMSEncoderRef cmsEncoder,
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CFDataRef * __nonnull CF_RETURNS_RETAINED eContentTypeOut) /* RETURNED */
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Signed CMS messages can contain arbitrary sets of certificates beyond those
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* indicating the identity of the signer(s). This function provides a means of
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* adding these other certs. For normal signed messages it is not necessary to
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* call this; the signer cert(s) and the intermediate certs needed to verify the
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* signer(s) will be included in the message implicitly.
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*
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* -- Caller can pass in one cert, as a SecCertificateRef, or an array of certs,
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* as a CFArray of SecCertificateRefs.
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* -- If this is called, it must be called before the first call to
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* CMSEncoderUpdateContent().
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* -- There is a "special case" use of CMS messages which involves neither
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* signing nor encryption, but does include certificates. This is commonly
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* used to transport "bags" of certificates. When constructing such a
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* message, all an application needs to do is to create a CMSEncoderRef,
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* call CMSEncoderAddSupportingCerts() one or more times, and then call
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* CMSEncoderCopyEncodedContent() to get the resulting cert bag. No 'content'
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* need be specified. (This is in fact the primary intended use for
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* this function.)
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*/
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OSStatus CMSEncoderAddSupportingCerts(
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CMSEncoderRef cmsEncoder,
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CFTypeRef certOrArray)
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Obtain the SecCertificates provided in CMSEncoderAddSupportingCerts().
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* If CMSEncoderAddSupportingCerts() has not been called this will return a
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* NULL value for *certs.
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* Caller must CFRelease the result.
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*/
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OSStatus CMSEncoderCopySupportingCerts(
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CMSEncoderRef cmsEncoder,
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CFArrayRef * __nonnull CF_RETURNS_RETAINED certsOut) /* RETURNED */
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Standard signed attributes, optionally specified in
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* CMSEncoderAddSignedAttributes().
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*/
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typedef CF_ENUM(uint32_t, CMSSignedAttributes) {
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kCMSAttrNone = 0x0000,
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/*
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* S/MIME Capabilities - identifies supported signature, encryption, and
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* digest algorithms.
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*/
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kCMSAttrSmimeCapabilities = 0x0001,
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/*
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* Indicates that a cert is the preferred cert for S/MIME encryption.
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*/
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kCMSAttrSmimeEncryptionKeyPrefs = 0x0002,
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/*
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* Same as kCMSSmimeEncryptionKeyPrefs, using an attribute OID preferred
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* by Microsoft.
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*/
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kCMSAttrSmimeMSEncryptionKeyPrefs = 0x0004,
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/*
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* Include the signing time.
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*/
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kCMSAttrSigningTime = 0x0008
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};
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/*
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* Optionally specify signed attributes. Only meaningful when creating a
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* signed message. If this is called, it must be called before
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* CMSEncoderUpdateContent().
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*/
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OSStatus CMSEncoderAddSignedAttributes(
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CMSEncoderRef cmsEncoder,
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CMSSignedAttributes signedAttributes)
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Specification of what certificates to include in a signed message.
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*/
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typedef CF_ENUM(uint32_t, CMSCertificateChainMode) {
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kCMSCertificateNone = 0, /* don't include any certificates */
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kCMSCertificateSignerOnly, /* only include signer certificate(s) */
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kCMSCertificateChain, /* signer certificate chain up to but not
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* including root certiticate */
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kCMSCertificateChainWithRoot /* signer certificate chain including root */
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};
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/*
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* Optionally specify which certificates, if any, to include in a
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* signed CMS message. The default, if this is not called, is
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* kCMSCertificateChain, in which case the signer cert plus all CA
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* certs needed to verify the signer cert, except for the root
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* cert, are included.
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* If this is called, it must be called before
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* CMSEncoderUpdateContent().
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*/
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OSStatus CMSEncoderSetCertificateChainMode(
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CMSEncoderRef cmsEncoder,
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CMSCertificateChainMode chainMode)
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Obtain indication of which signer certs are to be included
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* in a signed CMS message.
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*/
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OSStatus CMSEncoderGetCertificateChainMode(
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CMSEncoderRef cmsEncoder,
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CMSCertificateChainMode *chainModeOut)
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Feed content bytes into the encoder.
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* Can be called multiple times.
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* No 'setter' routines can be called after this function has been called.
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*/
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OSStatus CMSEncoderUpdateContent(
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CMSEncoderRef cmsEncoder,
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const void *content,
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size_t contentLen)
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* Finish encoding the message and obtain the encoded result.
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* Caller must CFRelease the result.
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*/
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OSStatus CMSEncoderCopyEncodedContent(
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CMSEncoderRef cmsEncoder,
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CFDataRef * __nonnull CF_RETURNS_RETAINED encodedContentOut) /* RETURNED */
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__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
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/*
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* High-level, one-shot encoder function.
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*
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* Inputs (all except for content optional, though at least one
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* of {signers, recipients} must be non-NULL)
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* ------------------------------------------------------------
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* signers : signer identities. Either a SecIdentityRef, or a
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* CFArray of them.
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||
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* recipients : recipient certificates. Either a SecCertificateRef,
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* or a CFArray of them.
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||
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* eContentType : contentType for inner EncapsulatedData.
|
||
|
|
* detachedContent : when true, do not include the signed data in the message.
|
||
|
|
* signedAttributes : Specifies which standard signed attributes are to be
|
||
|
|
* included in the message.
|
||
|
|
* content : raw content to be signed and/or encrypted.
|
||
|
|
*
|
||
|
|
* Output
|
||
|
|
* ------
|
||
|
|
* encodedContent : the result of the encoding.
|
||
|
|
*
|
||
|
|
* NOTE: This function is deprecated in Mac OS X 10.7 and later;
|
||
|
|
* please use CMSEncodeContent() instead.
|
||
|
|
*/
|
||
|
|
OSStatus CMSEncode(
|
||
|
|
CFTypeRef __nullable signers,
|
||
|
|
CFTypeRef __nullable recipients,
|
||
|
|
const CSSM_OID * __nullable eContentType,
|
||
|
|
Boolean detachedContent,
|
||
|
|
CMSSignedAttributes signedAttributes,
|
||
|
|
const void * content,
|
||
|
|
size_t contentLen,
|
||
|
|
CFDataRef * __nonnull CF_RETURNS_RETAINED encodedContentOut) /* RETURNED */
|
||
|
|
/* DEPRECATED_IN_MAC_OS_X_VERSION_10_7_AND_LATER; */
|
||
|
|
__OSX_AVAILABLE_STARTING(__MAC_10_5, __IPHONE_NA);
|
||
|
|
|
||
|
|
|
||
|
|
/*
|
||
|
|
* High-level, one-shot encoder function.
|
||
|
|
*
|
||
|
|
* Inputs (all except for content optional, though at least one
|
||
|
|
* of {signers, recipients} must be non-NULL)
|
||
|
|
* ------------------------------------------------------------
|
||
|
|
* signers : signer identities. Either a SecIdentityRef, or a
|
||
|
|
* CFArray of them.
|
||
|
|
* recipients : recipient certificates. Either a SecCertificateRef,
|
||
|
|
* or a CFArray of them.
|
||
|
|
* eContentTypeOID : contentType OID for inner EncapsulatedData, e.g.:
|
||
|
|
* CFSTR("1.2.840.113549.1.7.1")
|
||
|
|
* detachedContent : when true, do not include the signed data in the message.
|
||
|
|
* signedAttributes : Specifies which standard signed attributes are to be
|
||
|
|
* included in the message.
|
||
|
|
* content : raw content to be signed and/or encrypted.
|
||
|
|
*
|
||
|
|
* Output
|
||
|
|
* ------
|
||
|
|
* encodedContent : the result of the encoding.
|
||
|
|
*/
|
||
|
|
OSStatus CMSEncodeContent(
|
||
|
|
CFTypeRef __nullable signers,
|
||
|
|
CFTypeRef __nullable recipients,
|
||
|
|
CFTypeRef __nullable eContentTypeOID,
|
||
|
|
Boolean detachedContent,
|
||
|
|
CMSSignedAttributes signedAttributes,
|
||
|
|
const void *content,
|
||
|
|
size_t contentLen,
|
||
|
|
CFDataRef * __nullable CF_RETURNS_RETAINED encodedContentOut) /* RETURNED */
|
||
|
|
__OSX_AVAILABLE_STARTING(__MAC_10_7, __IPHONE_NA);
|
||
|
|
|
||
|
|
OSStatus CMSEncoderCopySignerTimestamp(
|
||
|
|
CMSEncoderRef cmsEncoder,
|
||
|
|
size_t signerIndex, /* usually 0 */
|
||
|
|
CFAbsoluteTime *timestamp) /* RETURNED */
|
||
|
|
__OSX_AVAILABLE_STARTING(__MAC_10_8, __IPHONE_NA);
|
||
|
|
|
||
|
|
OSStatus CMSEncoderCopySignerTimestampWithPolicy(
|
||
|
|
CMSEncoderRef cmsEncoder,
|
||
|
|
CFTypeRef __nullable timeStampPolicy,
|
||
|
|
size_t signerIndex, /* usually 0 */
|
||
|
|
CFAbsoluteTime *timestamp) /* RETURNED */
|
||
|
|
__OSX_AVAILABLE_STARTING(__MAC_10_10, __IPHONE_NA);
|
||
|
|
|
||
|
|
CF_ASSUME_NONNULL_END
|
||
|
|
|
||
|
|
#ifdef __cplusplus
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif /* _CMS_ENCODER_H_ */
|
||
|
|
|