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- /************************************************************
-
- Created: Monday, January 11, 1993 at 7:23PM
- DigitalSignature.h
- C Interface to the Macintosh Libraries
-
- ••• Apple Confidential •••
- ••• Provided with AOCE Beta seed under license agreement with •••
- ••• Apple Computer, Inc. Use for any purpose other than •••
- ••• development of AOCE-based Macintosh products is a violation •••
- ••• of the license agreement. •••
-
- Copyright Apple Computer, Inc. 1990-1993
- All rights reserved
-
- ************************************************************/
-
-
- #ifndef __DIGITALSIGNATURE__
- #define __DIGITALSIGNATURE__
-
- #ifndef __FILES__
- #include <Files.h>
- #endif
-
- #ifndef __MEMORY__
- #include <Memory.h>
- #endif
-
- #ifndef __TYPES__
- #include <Types.h>
- #endif
-
-
- /* —————————————————————————— MACROS AND TRAP SELECTORS —————————————————————————— */
- #ifndef __DigitalSignature
- #define __DigitalSignature(count,selector) = { 0x203C, count, selector, 0xAA5D}
- #endif
-
- #define kSIGNewContext 1900
- #define kSIGDisposeContext 1901
-
- #define kSIGSignPrepare 1902
- #define kSIGSign 1903
-
- #define kSIGVerifyPrepare 1904
- #define kSIGVerify 1905
-
- #define kSIGDigestPrepare 1906
- #define kSIGDigest 1907
-
- #define kSIGProcessData 1908
-
- #define kSIGShowSigner 1909
- #define kSIGGetSignerInfo 1910
- #define kSIGGetCertInfo 1911
- #define kSIGGetCertNameAttributes 1912
- #define kSIGGetCertIssuerNameAttributes 1913
-
- #define kSIGFileIsSigned 2500
- #define kSIGSignFile 2501
- #define kSIGVerifyFile 2502
-
-
- /* values of SIGNameAttributeType */
- enum {
- kSIGCountryCode,
- kSIGOrganization,
- kSIGStreetAddress,
- kSIGState,
- kSIGLocality,
- kSIGCommonName,
- kSIGTitle,
- kSIGOrganizationUnit,
- kSIGPostalCode
- };
-
- 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 */
- enum {
- kSIGValid, /* possible for either a SIGCertStatus or SIGSignatureStatus */
- kSIGPending, /* possible for either a SIGCertStatus or SIGSignatureStatus */
- kSIGExpired, /* possible for either a SIGCertStatus or SIGSignatureStatus */
- kSIGInvalid /* possible only for a SIGSignatureStatus */
- };
-
- typedef unsigned short SIGCertStatus;
- typedef unsigned short SIGSignatureStatus;
-
- /* Gestalt selector code - returns toolbox version in low-order word */
- #define gestaltDigitalSignatureVersion 'dsig'
-
-
- /* Number of bytes needed for a digest record when using SIGDigest */
- #define kSIGDigestSize 16
-
- typedef Byte SIGDigestData[kSIGDigestSize], *SIGDigestDataPtr;
-
- struct SIGCertInfo {
- unsigned long startDate; /* cert start validity date */
- unsigned long endDate; /* cert end validity date */
- SIGCertStatus certStatus; /* see comment on SIGCertStatus for definition */
- unsigned long certAttributeCount; /* number of name attributes in this cert */
- unsigned long issuerAttributeCount; /* number of name attributes in this certs issuer */
- Str255 serialNumber; /* cert serial number */
- };
-
- typedef struct SIGCertInfo SIGCertInfo;
- typedef SIGCertInfo *SIGCertInfoPtr;
-
- struct SIGSignerInfo {
- unsigned long signingTime; /* time of signing */
- unsigned long certCount; /* number of certificates in the cert set */
- unsigned long certSetStatusTime; /* Worst cert status time. See comment on SIGCertStatus for definition */
- SIGSignatureStatus signatureStatus; /* The status of the signature. See comment on SIGCertStatus for definition*/
- };
-
- typedef struct SIGSignerInfo SIGSignerInfo;
- typedef SIGSignerInfo *SIGSignerInfoPtr;
-
- struct SIGNameAttributesInfo {
- Boolean onNewLevel;
- SIGNameAttributeType attributeType;
- ScriptCode attributeScript;
- Str255 attribute;
- };
-
- typedef struct SIGNameAttributesInfo SIGNameAttributesInfo;
- typedef SIGNameAttributesInfo *SIGNameAttributesInfoPtr;
-
- 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.
- */
-
- #define kSIGSignerCertIndex 0
-
- /*
- Call back procedure supplied by developer, return false to cancel the current
- process.
- */
-
- typedef pascal Boolean (*SIGStatusProcPtr)(void);
-
- /*
- Resource id of standard signature icon suite, all sizes and colors are available.
- */
-
- #define kSIGSignatureIconResID -5045
-
- /* ——————————————————————————————— 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.
- */
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- pascal OSErr SIGNewContext(SIGContextPtr *context)
- __DigitalSignature(2, kSIGNewContext);
-
- pascal OSErr SIGDisposeContext(SIGContextPtr context)
- __DigitalSignature(2, kSIGDisposeContext);
-
-
- /* ——————————————————————————————— 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.
- */
-
- pascal OSErr SIGSignPrepare(SIGContextPtr context, const FSSpec *signerFile,
- ConstStr255Param prompt, Size *signatureSize)
- __DigitalSignature(8, kSIGSignPrepare);
-
- pascal OSErr SIGSign(SIGContextPtr context, SIGSignaturePtr signature,
- SIGStatusProcPtr statusProc)
- __DigitalSignature(6, kSIGSign);
-
-
- /* ——————————————————————————————— 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.
- */
-
- pascal OSErr SIGVerifyPrepare(SIGContextPtr context, SIGSignaturePtr signature,
- Size signatureSize, SIGStatusProcPtr statusProc)
- __DigitalSignature(8, kSIGVerifyPrepare);
-
- pascal OSErr SIGVerify(SIGContextPtr context)
- __DigitalSignature(2, kSIGVerify);
-
- /* —————————————————————————————— 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.
- */
-
- pascal OSErr SIGDigestPrepare(SIGContextPtr context)
- __DigitalSignature(2, kSIGDigestPrepare);
-
- pascal OSErr SIGDigest(SIGContextPtr context, SIGDigestData digest)
- __DigitalSignature(4, kSIGDigest);
-
-
- /* —————————————————————————————— 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).
- */
-
- pascal OSErr SIGProcessData(SIGContextPtr context, const void *data, Size dataSize)
- __DigitalSignature(6, kSIGProcessData);
-
-
- /* ——————————————————————————————— 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);
- }
- */
-
- pascal OSErr SIGShowSigner(SIGContextPtr context, ConstStr255Param prompt)
- __DigitalSignature(4, kSIGShowSigner);
-
- pascal OSErr SIGGetSignerInfo(SIGContextPtr context, SIGSignerInfo *signerInfo)
- __DigitalSignature(4, kSIGGetSignerInfo);
-
- pascal OSErr SIGGetCertInfo(SIGContextPtr context, unsigned long certIndex, SIGCertInfo *certInfo)
- __DigitalSignature(6, kSIGGetCertInfo);
-
- pascal OSErr SIGGetCertNameAttributes(SIGContextPtr context, unsigned long certIndex,
- unsigned long attributeIndex, SIGNameAttributesInfo *attributeInfo)
- __DigitalSignature(8, kSIGGetCertNameAttributes);
-
- pascal OSErr SIGGetCertIssuerNameAttributes(SIGContextPtr context, unsigned long certIndex,
- unsigned long attributeIndex, SIGNameAttributesInfo *attributeInfo)
- __DigitalSignature(8, kSIGGetCertIssuerNameAttributes);
-
-
-
- /* ——————————————————————————— 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.
- */
-
- pascal OSErr SIGFileIsSigned(const FSSpec *fileSpec)
- __DigitalSignature(2, kSIGFileIsSigned);
-
- pascal OSErr SIGSignFile(SIGContextPtr context, Size signatureSize, const FSSpec *fileSpec, SIGStatusProcPtr statusProc)
- __DigitalSignature(8, kSIGSignFile);
-
- pascal OSErr SIGVerifyFile(SIGContextPtr context, const FSSpec *fileSpec, SIGStatusProcPtr statusProc)
- __DigitalSignature(6, kSIGVerifyFile);
-
- #ifdef __cplusplus
- }
- #endif
-
-
- #endif
-