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Text File | 1996-05-01 | 11.3 KB | 238 lines | [TEXT/MPS ] |
- /*
- File: DigitalSignature.idl
-
- Contains: Digital Signature Interfaces.
-
- Version: Technology: AOCE toolbox 1.02
- Release: Universal Interfaces 3.0d3 on Copland DR1
-
- Copyright: © 1984-1996 by Apple Computer, Inc. All rights reserved.
-
- Bugs?: If you find a problem with this file, send the file and version
- information (from above) and the problem description to:
-
- Internet: apple.bugs@applelink.apple.com
- AppleLink: APPLE.BUGS
-
- */
- #ifndef __DIGITALSIGNATURE_IDL__
- #define __DIGITALSIGNATURE_IDL__
-
- #include <somobj.idl>
- #include <somcls.idl>
-
- #ifndef __TYPES_IDL__
- #include <Types.idl>
- #endif
- #ifndef __MEMORY_IDL__
- #include <Memory.idl>
- #endif
- #ifndef __FILES_IDL__
- #include <Files.idl>
- #endif
-
- #ifdef __SOMIDL__
-
- #if FOR_SYSTEM7_ONLY
- /* values of SIGNameAttributeType */
- typedef unsigned short SIGNameAttributeType;
-
- /*
- Certificate status codes returned in SIGCertInfo or SIGSignerInfo from
- either SIGGetCertInfo or SIGGetSignerInfo respectively. kSIGValid means that
- the certificate is currently valid. kSIGPending means the certificate is
- currently not valid - but will be. kSIGExpired means the certificate has
- expired. A time is always associated with a SIGCertStatus. In each case the
- time has a specific interpretation. When the status is kSIGValid the time is
- when the certificate will expire. When the status is kSIGPending the time is
- when the certificate will become valid. When the status is kSIGExpired the time
- is when the certificate expired. In the SIGCertInfo structure, the startDate
- and endDate fields hold the appropriate date information. In the SIGSignerInfo
- structure, this information is provided in the certSetStatusTime field. In the
- SIGSignerInfo struct, the status time is actually represented by the SIGSignatureStatus
- field which can contain any of the types below. NOTE: The only time you will get
- a kSIGInvalid status is when it pertains to a SIGSignatureStatus field and only when
- you get a signature that was created after the certificates expiration date, something
- we are not allowing on the Mac but that may not be restricted on other platforms. Also,
- it will not be possible to get a kSIGPending value for SIGSignatureStatus on the Mac but
- possibly allowed by other platforms.
- */
- /* Values for SIGCertStatus or SIGSignatureStatus */
- typedef unsigned short SIGCertStatus;
-
- typedef unsigned short SIGSignatureStatus;
-
- /* Gestalt selector code - returns toolbox version in low-order word */
- /* Number of bytes needed for a digest record when using SIGDigest */
- typedef OpaquePtr SIGDigestData; /* Substituted OpaquePtr for array of Byte of size 16 */
-
- typedef OpaquePtr SIGDigestDataPtr; /* Substituted OpaquePtr for “Byte*” */
-
- typedef SOMLargeStruct SIGCertInfo; /* Derived from a struct of 274 bytes in size */
-
- typedef OpaquePtr SIGCertInfoPtr; /* Substituted OpaquePtr for “SIGCertInfo*” */
-
- typedef SOMLargeStruct SIGSignerInfo; /* Derived from a struct of 14 bytes in size */
-
- typedef OpaquePtr SIGSignerInfoPtr; /* Substituted OpaquePtr for “SIGSignerInfo*” */
-
- typedef SOMLargeStruct SIGNameAttributesInfo; /* Derived from a struct of 262 bytes in size */
-
- typedef OpaquePtr SIGNameAttributesInfoPtr; /* Substituted OpaquePtr for “SIGNameAttributesInfo*” */
-
- typedef Ptr SIGContextPtr;
-
- typedef Ptr SIGSignaturePtr;
-
- /*
- Certificates are always in order. That is, the signers cert is always 0, the
- issuer of the signers cert is always 1 etc… to the number of certificates-1.
- You can use this constant for readability in your code.
- */
- /*
- Call back procedure supplied by developer, return false to cancel the current
- process.
- */
- typedef OpaquePtr SIGStatusProcPtr;
- typedef OpaquePtr SIGStatusUPP;
- /*
- Resource id's of standard signature icon suite, all sizes and colors are available.
- */
- /*
- ——————————————————————————————— CONTEXT CALLS ———————————————————————————————
- To use the Digital Signature toolbox you will need a SIGContextPtr. To create
- a SIGContextPtr you simply call SIGNewContext and it will create and initialize
- a context for you. To free the memory occupied by the context and invalidate
- its internal data, call SIGDisposeContext. An initialized context has no notion
- of the type of operation it will be performing however, once you call
- SIGSignPrepare SIGVerifyPrepare, or SIGDigestPrepare, the contexts operation
- type is set and to switch to another type of operation will require creating a
- new context. Be sure to pass the same context to corresponding toolbox calls
- (ie SIGSignPrepare, SIGProcessData, SIGSign) in other words mixing lets say
- signing and verify calls with the same context is not allowed.
- */
- /*
- ——————————————————————————————— SIGNING CALLS ———————————————————————————————
- Once you have created a SIGContextPtr, you create a signature by calling
- SIGSignPrepare once, followed by n calls to SIGProcessData, followed by one call
- toRcpt SIGSign. To create another signature on different data but for the same
- signer, don't dispose of the context and call SIGProcessData for the new data
- followed by a call SIGSign again. In this case the signer will not be prompted
- for their signer and password again as it was already provided. Once you call
- SIGDisposeContext, all signer information will be cleared out of the context and
- the signer will be re-prompted. The signer file FSSpecPtr should be set to nil
- if you want the toolbox to use the last signer by default or prompt for a signer
- if none exists. The prompt parameter can be used to pass a string to be displayed
- in the dialog that prompts the user for their password. If the substring "^1"
- (without the quotes) is in the prompt string, then the toolbox will replace it
- with the name of the signer from the signer selected by the user. If an empty
- string is passed, the following default string will be sent to the toolbox
- "\pSigning as ^1.". You can call any of the utility routines after SIGSignPrepare
- or SIGSign to get information about the signer or certs.
- */
- /*
- ——————————————————————————————— VERIFYING CALLS ———————————————————————————————
- Once you have created a SIGContextPtr, you verify a signature by calling
- SIGVerifyPrepare once, followed by n calls to SIGProcessData, followed by one
- call to SIGVerify. Check the return code from SIGVerify to see if the signature
- verified or not (noErr is returned on success otherwise the appropriate error
- code). Upon successfull verification, you can call any of the utility routines
- toRcpt find out who signed the data.
- */
- /*
- —————————————————————————————— DIGESTING CALLS ——————————————————————————————
- Once you have created a SIGContextPtr, you create a digest by calling
- SIGDigestPrepare once, followed by n calls to SIGProcessData, followed by one
- call to SIGDigest. You can dispose of the context after SIGDigest as the
- SIGDigestData does not reference back into it. SIGDigest returns the digest in
- digest.
- */
- /*
- —————————————————————————————— PROCESSING DATA ——————————————————————————————
- To process data during a digest, sign, or verify operation call SIGProcessData
- as many times as necessary and with any sized blocks of data. The data needs to
- be processed in the same order during corresponding sign and verify operations
- but does not need to be processed in the same sized chunks (i.e., the toolbox
- just sees it as a continuous bit stream).
- */
- /*
- ——————————————————————————————— UTILITY CALLS ———————————————————————————————
- Given a context that has successfully performed a verification SIGShowSigner
- will display a modal dialog with the entire distinguished name of the person
- who signed the data. the prompt (if supplied) will appear at the top of the
- dialog. If no prompt is specified, the default prompt "\pVerification
- Successfull." will appear.
-
- Given a context that has been populated by calling SIGSignPrepare, SIGSign or a
- successful SIGVerify, you can make the remaining utility calls:
-
- SIGGetSignerInfo will return the SignerInfo record. The certCount can be used
- toRcpt index into the certificate set when calling SIGGetCertInfo,
- SIGGetCertNameAttributes or SIGGetCertIssuerNameAttributes. The signingTime is
- only defined if the call is made after SIGSign or SIGVerify. The certSetStatus
- will tell you the best status of the entire certificate set while
- certSetStatusTime will correspond to the time associated with that status (see
- definitions above).
-
- SIGGetCertInfo will return the SIGCertInfo record when given a valid index into
- the cert set in certIndex. Note: The cert at index kSIGSignerCertIndex is
- always the signers certificate. The serial number, start date and end date
- are there should you wish to display that info. The certAttributeCount and
- issuerAttributeCount provide the number of parts in the name of that certificate
- or that certificates issuer respectively. You use these numbers to index into
- either SIGGetCertNameAttributes or SIGGetCertIssuerNameAttributes to retrieve
- the name. The certStatus will tell you the status of the certificate while
- certStatusTime will correspond to the time associated with that status (see
- definitions above).
-
- SIGGetCertNameAttributes and SIGGetCertIssuerNameAttributes return name parts
- of the certificate at certIndex and attributeIndex. The newLevel return value
- tells you wether the name attribute returned is at the same level in the name
- hierarchy as the previous attribute. The type return value tells you the type
- of attribute returned. nameAttribute is the actual string containing the name
- attribute. So, if you wanted to display the entire distinguished name of the
- person who's signature was just validated you could do something like this;
-
- (…… variable declarations and verification code would preceed this sample ……)
-
- error = SIGGetCertInfo(verifyContext, kSIGSignerCertIndex, &certInfo);
- HandleErr(error);
-
- for (i = 0; i <= certInfo.certAttributeCount-1; i++)
- {
- error = SIGGetCertNameAttributes(
- verifyContext, kSIGSignerCertIndex, i, &newLevel, &type, theAttribute);
- HandleErr(error);
- DisplayNamePart(theAttribute, type, newLevel);
- }
- */
- /*
- ——————————————————————————— FILE SIGN & VERIFY CALLS ——————————————————————————
- These calls allow you to detect the presence of a standard signtaure in a file as
- well as sign and verify files in a standard way. An example of this is the Finder,
- which uses these calls to allow the user to "drop sign" a file.
-
- To detect if a file is signed in the standard way, pass the FSSpec of the file to SIGFileIsSigned.
- A result of noErr means the file is in fact signed, otherwise, a kSIGNoSignature error will
- be returned.
-
- Once you have created a SIGContextPtr, you can make calls to either sign or verify a file in
- a standard way:
-
- To sign a file, call SIGSignPrepare followed by 'n' number of calls to SIGSignFile,
- passing it the file spec for each file you wish to sign in turn. You supply the context, the signature
- size that was returned from SIGSignPrepare and an optional call back proc. The call will take care of all
- the processing of data and affixing the signature to the file. If a signature already exists in the file,
- it is replaced with the newly created signature.
-
- To verify a file that was signed using SIGSignFile, call SIGVerifyFile passing it a new context and
- the file spec. Once this call has completed, if the verification is successfull, you can pass the context
- to SIGShowSigner to display the name of the person who signed the file.
- */
- #endif
-
- #endif /* __SOMIDL__ */
-
- #endif /* __DIGITALSIGNATURE_IDL__ */
-
-