| // Copyright 2020 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef PUBLIC_FPDF_SIGNATURE_H_ |
| #define PUBLIC_FPDF_SIGNATURE_H_ |
| |
| // NOLINTNEXTLINE(build/include) |
| #include "fpdfview.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif // __cplusplus |
| |
| // Experimental API. |
| // Function: FPDF_GetSignatureCount |
| // Get total number of signatures in the document. |
| // Parameters: |
| // document - Handle to document. Returned by FPDF_LoadDocument(). |
| // Return value: |
| // Total number of signatures in the document on success, -1 on error. |
| FPDF_EXPORT int FPDF_CALLCONV FPDF_GetSignatureCount(FPDF_DOCUMENT document); |
| |
| // Experimental API. |
| // Function: FPDF_GetSignatureObject |
| // Get the Nth signature of the document. |
| // Parameters: |
| // document - Handle to document. Returned by FPDF_LoadDocument(). |
| // index - Index into the array of signatures of the document. |
| // Return value: |
| // Returns the handle to the signature, or NULL on failure. The caller |
| // does not take ownership of the returned FPDF_SIGNATURE. Instead, it |
| // remains valid until FPDF_CloseDocument() is called for the document. |
| FPDF_EXPORT FPDF_SIGNATURE FPDF_CALLCONV |
| FPDF_GetSignatureObject(FPDF_DOCUMENT document, int index); |
| |
| // Experimental API. |
| // Function: FPDFSignatureObj_GetContents |
| // Get the contents of a signature object. |
| // Parameters: |
| // signature - Handle to the signature object. Returned by |
| // FPDF_GetSignatureObject(). |
| // buffer - The address of a buffer that receives the contents. |
| // length - The size, in bytes, of |buffer|. |
| // Return value: |
| // Returns the number of bytes in the contents on success, 0 on error. |
| // |
| // For public-key signatures, |buffer| is either a DER-encoded PKCS#1 binary or |
| // a DER-encoded PKCS#7 binary. If |length| is less than the returned length, or |
| // |buffer| is NULL, |buffer| will not be modified. |
| FPDF_EXPORT unsigned long FPDF_CALLCONV |
| FPDFSignatureObj_GetContents(FPDF_SIGNATURE signature, |
| void* buffer, |
| unsigned long length); |
| |
| // Experimental API. |
| // Function: FPDFSignatureObj_GetByteRange |
| // Get the byte range of a signature object. |
| // Parameters: |
| // signature - Handle to the signature object. Returned by |
| // FPDF_GetSignatureObject(). |
| // buffer - The address of a buffer that receives the |
| // byte range. |
| // length - The size, in ints, of |buffer|. |
| // Return value: |
| // Returns the number of ints in the byte range on |
| // success, 0 on error. |
| // |
| // |buffer| is an array of pairs of integers (starting byte offset, |
| // length in bytes) that describes the exact byte range for the digest |
| // calculation. If |length| is less than the returned length, or |
| // |buffer| is NULL, |buffer| will not be modified. |
| FPDF_EXPORT unsigned long FPDF_CALLCONV |
| FPDFSignatureObj_GetByteRange(FPDF_SIGNATURE signature, |
| int* buffer, |
| unsigned long length); |
| |
| // Experimental API. |
| // Function: FPDFSignatureObj_GetSubFilter |
| // Get the encoding of the value of a signature object. |
| // Parameters: |
| // signature - Handle to the signature object. Returned by |
| // FPDF_GetSignatureObject(). |
| // buffer - The address of a buffer that receives the encoding. |
| // length - The size, in bytes, of |buffer|. |
| // Return value: |
| // Returns the number of bytes in the encoding name (including the |
| // trailing NUL character) on success, 0 on error. |
| // |
| // The |buffer| is always encoded in 7-bit ASCII. If |length| is less than the |
| // returned length, or |buffer| is NULL, |buffer| will not be modified. |
| FPDF_EXPORT unsigned long FPDF_CALLCONV |
| FPDFSignatureObj_GetSubFilter(FPDF_SIGNATURE signature, |
| char* buffer, |
| unsigned long length); |
| |
| // Experimental API. |
| // Function: FPDFSignatureObj_GetReason |
| // Get the reason (comment) of the signature object. |
| // Parameters: |
| // signature - Handle to the signature object. Returned by |
| // FPDF_GetSignatureObject(). |
| // buffer - The address of a buffer that receives the reason. |
| // length - The size, in bytes, of |buffer|. |
| // Return value: |
| // Returns the number of bytes in the reason on success, 0 on error. |
| // |
| // Regardless of the platform, the |buffer| is always in UTF-16LE encoding. The |
| // string is terminated by a UTF16 NUL character. If |length| is less than the |
| // returned length, or |buffer| is NULL, |buffer| will not be modified. |
| FPDF_EXPORT unsigned long FPDF_CALLCONV |
| FPDFSignatureObj_GetReason(FPDF_SIGNATURE signature, |
| void* buffer, |
| unsigned long length); |
| |
| // Experimental API. |
| // Function: FPDFSignatureObj_GetTime |
| // Get the time of signing of a signature object. |
| // Parameters: |
| // signature - Handle to the signature object. Returned by |
| // FPDF_GetSignatureObject(). |
| // buffer - The address of a buffer that receives the time. |
| // length - The size, in bytes, of |buffer|. |
| // Return value: |
| // Returns the number of bytes in the encoding name (including the |
| // trailing NUL character) on success, 0 on error. |
| // |
| // The |buffer| is always encoded in 7-bit ASCII. If |length| is less than the |
| // returned length, or |buffer| is NULL, |buffer| will not be modified. |
| // |
| // The format of time is expected to be D:YYYYMMDDHHMMSS+XX'YY', i.e. it's |
| // percision is seconds, with timezone information. This value should be used |
| // only when the time of signing is not available in the (PKCS#7 binary) |
| // signature. |
| FPDF_EXPORT unsigned long FPDF_CALLCONV |
| FPDFSignatureObj_GetTime(FPDF_SIGNATURE signature, |
| char* buffer, |
| unsigned long length); |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif // __cplusplus |
| |
| #endif // PUBLIC_FPDF_SIGNATURE_H_ |