SecCodeSigner.h   [plain text]


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/*!
	@header SecCodeSigner
	SecCodeSigner represents an object that can sign code.
*/
#ifndef _H_SECCODESIGNER
#define _H_SECCODESIGNER

#ifdef __cplusplus
extern "C" {
#endif

#include <Security/CSCommon.h>

/*!
	@typedef SecCodeSignerRef
	This is the type of a reference to a code requirement.
*/
typedef struct __SecCodeSigner *SecCodeSignerRef;	/* code signing object */


/*!
	@function SecCodeGetTypeID
	Returns the type identifier of all SecCodeSigner instances.
*/
CFTypeID SecCodeSignerGetTypeID(void);


/*!
	The following CFString constants can be used as keys in the parameters argument
	of SecCodeSignerCreate to specify various modes and options of the signing operation.
	Passing any keys not specified here may lead to undefined behavior and is not supported.
	The same applies to passing objects of types not explicitly allowed here.

	@constant kSecCodeSignerDetached Determines where the signature is written.
		If this key is absent, the code being signed is modified to contain the signature,
		replacing any signature already embedded there.
		If the value is kCFNull, the signature is written to the system-wide detached
		signature database. (You must have root privileges to write there.)
		If the value of this key is a CFURL, the signature is written to a file at that location,
		replacing any data there.
		If the value is a CFMutableData, the signature is appended to that data.
	@constant kSecCodeSignerDryRun A boolean value. If present and true, the actual writing
		of the signature is inhibited, and the code is not modified, but all operations
		leading up to this are performed normally, including the cryptographic access to
		the signing identity (if any).
	@constant kSecCodeSignerFlags A CFNumber specifying which flags to set in the code signature.
		Note that depending on circumstances, this value may be augmented or modified
		as part of the signing operation.
	@constant kSecCodeSignerIdentifier If present, a CFString that explicitly specifies
		the unique identifier string sealed into the code signature. If absent, the identifier
		is derived implicitly from the code being signed.
	@constant kSecCodeSignerIdentifierPrefix If the unique identifier string of the code signature
		is implicitly generated, and the resulting string does not contain any "." (dot)
		characters, then the (string) value of this parameter is prepended to the identifier.
		By convention, the prefix is usually of the form "com.yourcompany.", but any value
		is acceptable. If the kSecCodeSignerIdentifier parameter is specified, this parameter
		is ineffective (but still allowed).
	@constant kSecCodeSignerIdentity A SecIdentityRef describing the signing identity
		to use for signing code. This is a mandatory parameter for signing operations.
		Its value must be either a SecIdentityRef specifying a cryptographic identity
		valid for Code Signing, or the special value kCFNull to indicate ad-hoc signing.
	@constant kSecCodeSignerOperation The type of operation to be performed. Valid values
		are kSecCodeSignerOperationSign to sign code, and kSecCodeSignerOperationRemove
		to remove any existing signature from code. The default operation is to sign code.
	@constant kSecCodeSignerPageSize An integer value explicitly specifying the page size
		used to sign the main executable. This must be a power of two. A value of zero indicates
		infinite size (no paging).
		Only certain page sizes are allowed in most circumstances, and specifying an inappropriate
		size will lead to spurious verification failures. This is for expert use only.
	@constant kSecCodeSignerRequirements Specifies the internal requirements to be sealed into
		the code signature. Must be either a CFData containing the binary (compiled) form of
		a requirements set (SuperBlob), or a CFString containing a valid text form to be
		compiled into binary form. Default requirements are automatically generated if this
		parameter is omitted, and defaults may be applied to particular requirement types
		that are not specified; but any requirement type you specify is sealed exactly as
		specified.
	@constant kSecCodeSignerResourceRules A CFDictionary containing resource scanning rules
		determining what resource files are sealed into the signature (and in what way).
		A situation-dependent default is applied if this parameter is not specified.
	@constant kSecCodeSignerSDKRoot A CFURLRef indicating an alterate directory root
		where signing operations should find subcomponents (libraries, frameworks, modules, etc.).
		The default is the host system root "/".
	@constant kSecCodeSignerSigningTime Specifies what date and time is sealed into the
		code signature's CMS data. Can be either a CFDate object specifying a date, or
		the value kCFNull indicating that no date should be included in the signature.
		If not specified, the current date is chosen and sealed.
		Since an ad-hoc signature has no CMS data, this argument is ineffective
		for ad-hoc signing operations.
 */
extern const CFStringRef kSecCodeSignerApplicationData;
extern const CFStringRef kSecCodeSignerDetached;
extern const CFStringRef kSecCodeSignerDigestAlgorithm;
extern const CFStringRef kSecCodeSignerDryRun;
extern const CFStringRef kSecCodeSignerEntitlements;
extern const CFStringRef kSecCodeSignerFlags;
extern const CFStringRef kSecCodeSignerIdentifier;
extern const CFStringRef kSecCodeSignerIdentifierPrefix;
extern const CFStringRef kSecCodeSignerIdentity;
extern const CFStringRef kSecCodeSignerPageSize;
extern const CFStringRef kSecCodeSignerRequirements;
extern const CFStringRef kSecCodeSignerResourceRules;
extern const CFStringRef kSecCodeSignerSDKRoot;
extern const CFStringRef kSecCodeSignerSigningTime;


/*!
	@function SecCodeSignerCreate
	Create a (new) SecCodeSigner object to be used for signing code.

	@param parameters An optional CFDictionary containing parameters that influence
		signing operations with the newly created SecCodeSigner. If NULL, defaults
		are applied to all parameters; note however that some parameters do not have
		useful defaults, and will need to be set before signing is attempted.
	@param flags Optional flags. Pass kSecCSDefaultFlags for standard behavior.
		The kSecCSRemoveSignature flag requests that any existing signature be stripped
		from the target code instead of signing.
	@param staticCode On successful return, a SecStaticCode object reference representing
	the file system origin of the given SecCode. On error, unchanged.
	@result Upon success, noErr. Upon error, an OSStatus value documented in
	CSCommon.h or certain other Security framework headers.
*/
enum {
	kSecCSRemoveSignature = 1 << 0,		// strip existing signature
};


OSStatus SecCodeSignerCreate(CFDictionaryRef parameters, SecCSFlags flags,
	SecCodeSignerRef *signer);


/*!
	@function SecCodeSignerAddSignature
	Create a code signature and add it to the StaticCode object being signed.

	@param signer A SecCodeSigner object containing all the information required
	to sign code.
	@param code A valid SecStaticCode object reference representing code files
	on disk. This code will be signed, and will ordinarily be modified to contain
	the resulting signature data.
	@param flags Optional flags. Pass kSecCSDefaultFlags for standard behavior.
	@param errors An optional pointer to a CFErrorRef variable. If the call fails
	(and something other than noErr is returned), and this argument is non-NULL,
	a CFErrorRef is stored there further describing the nature and circumstances
	of the failure. The caller must CFRelease() this error object when done with it.
	@result Upon success, noErr. Upon error, an OSStatus value documented in
	CSCommon.h or certain other Security framework headers.
*/
OSStatus SecCodeSignerAddSignature(SecCodeSignerRef signer,
	SecStaticCodeRef code, SecCSFlags flags);
	
OSStatus SecCodeSignerAddSignatureWithErrors(SecCodeSignerRef signer,
	SecStaticCodeRef code, SecCSFlags flags, CFErrorRef *errors);


#ifdef __cplusplus
}
#endif

#endif //_H_SECCODESIGNER