RagePhoto(A): add jpegSign() function

- RagePhotoC: add ragephoto_getphotosign() ragephoto_getphotosignf()
ragephotodata_getphotosign() and ragephotodata_getphotosignf() functions

src/RagePhoto.cpp

@@ -120,6 +120,20 @@ inline void uInt32ToCharLE(uint32_t x, char *y)
     y[2] = x >> 16;
     y[3] = x >> 24;
 }
+
+inline uint32_t joaatFromInitial(const char *data, size_t size, uint32_t init_val)
+{
+    uint32_t val = init_val;
+    for (size_t i = 0; i != size; i++) {
+        val += data[i];
+        val += (val << 10);
+        val ^= (val >> 6);
+    }
+    val += (val << 3);
+    val ^= (val >> 11);
+    val += (val << 15);
+    return val;
+}
 /* END OF STATIC LIBRARY FUNCTIONS */
 
 /* BEGIN OF RAGEPHOTO CLASS */
@@ -526,6 +540,7 @@ bool RagePhoto::load(const char *data, size_t length, RagePhotoData *rp_data, Ra
         std::cout << "jsonBuffer: " << rp_data->jsonBuffer << std::endl;
         std::cout << "jsonOffset: " << rp_data->jsonOffset << std::endl;
         std::cout << "json: " << rp_data->json << std::endl;
+        std::cout << "sign: " << jpegSign(rp_data) << std::endl;
         std::cout << "titlBuffer: " << rp_data->titlBuffer << std::endl;
         std::cout << "titlOffset: " << rp_data->titlOffset << std::endl;
         std::cout << "title: " << rp_data->title << std::endl;
@@ -617,6 +632,29 @@ const char* RagePhoto::jpegData() const
     return m_data->jpeg;
 }
 
+uint64_t RagePhoto::jpegSign(uint32_t photoFormat, RagePhotoData *rp_data)
+{
+    if (photoFormat == PhotoFormat::GTA5)
+        return (0x100000000000000ULL | joaatFromInitial(rp_data->jpeg, rp_data->jpegSize, SignInitials::SIGTA5));
+    else
+        return 0;
+}
+
+uint64_t RagePhoto::jpegSign(RagePhotoData *rp_data)
+{
+    return jpegSign(rp_data->photoFormat, rp_data);
+}
+
+uint64_t RagePhoto::jpegSign(uint32_t photoFormat) const
+{
+    return jpegSign(photoFormat, m_data);
+}
+
+uint64_t RagePhoto::jpegSign() const
+{
+    return jpegSign(m_data->photoFormat, m_data);
+}
+
 uint32_t RagePhoto::jpegSize() const
 {
     if (m_data->jpeg)
@@ -1273,6 +1311,28 @@ const char* ragephoto_getphotoheader(ragephoto_t instance)
     return ragePhoto->header();
 }
 
+uint64_t ragephoto_getphotosign(ragephoto_t instance)
+{
+    RagePhoto *ragePhoto = static_cast<RagePhoto*>(instance);
+    return ragePhoto->jpegSign();
+}
+
+uint64_t ragephoto_getphotosignf(ragephoto_t instance, uint32_t photoFormat)
+{
+    RagePhoto *ragePhoto = static_cast<RagePhoto*>(instance);
+    return ragePhoto->jpegSign(photoFormat);
+}
+
+uint64_t ragephotodata_getphotosign(RagePhotoData *rp_data)
+{
+    return RagePhoto::jpegSign(rp_data);
+}
+
+uint64_t ragephotodata_getphotosignf(RagePhotoData *rp_data, uint32_t photoFormat)
+{
+    return RagePhoto::jpegSign(photoFormat, rp_data);
+}
+
 uint32_t ragephoto_getphotosize(ragephoto_t instance)
 {
     RagePhoto *ragePhoto = static_cast<RagePhoto*>(instance);

src/RagePhoto.h

@@ -92,6 +92,10 @@ public:
         GTA5 = 0x01000000UL, /**< GTA V Photo Format */
         RDR2 = 0x04000000UL, /**< RDR 2 Photo Format */
     };
+    /** Sign Initials */
+    enum SignInitials : uint32_t {
+        SIGTA5 = 0xE47AB81CUL, /**< GTA V Sign Initial */
+    };
     RagePhoto();
     ~RagePhoto();
     void addParser(RagePhotoFormatParser *rp_parser); /**< Add a custom defined RagePhotoFormatParser. */
@@ -119,6 +123,10 @@ public:
     const std::string_view jpeg_view() const; /**< Returns the Photo JPEG data. */
 #endif
     const char* jpegData() const; /**< Returns the Photo JPEG data. */
+    static uint64_t jpegSign(uint32_t photoFormat, RagePhotoData *rp_data); /**< Returns the Photo JPEG sign. */
+    static uint64_t jpegSign(RagePhotoData *rp_data); /**< Returns the Photo JPEG sign. */
+    uint64_t jpegSign(uint32_t photoFormat) const; /**< Returns the Photo JPEG sign. */
+    uint64_t jpegSign() const; /**< Returns the Photo JPEG sign. */
     uint32_t jpegSize() const; /**< Returns the Photo JPEG data size. */
     const char* description() const; /**< Returns the Photo description. */
     const char* json() const; /**< Returns the Photo JSON data. */

src/RagePhotoA.h

@@ -92,6 +92,10 @@ public:
         GTA5 = 0x01000000UL, /**< GTA V Photo Format */
         RDR2 = 0x04000000UL, /**< RDR 2 Photo Format */
     };
+    /** Sign Initials */
+    enum SignInitials : uint32_t {
+        SIGTA5 = 0xE47AB81CUL, /**< GTA V Sign Initial */
+    };
     RagePhotoA() {
         instance = ragephoto_open();
     }
@@ -167,6 +171,22 @@ public:
     const char* jpegData() const {
         return ragephoto_getphotojpeg(instance);
     }
+    /**< Returns the Photo JPEG sign. */
+    static uint64_t jpegSign(uint32_t photoFormat, RagePhotoData *rp_data) {
+        return ragephotodata_getphotosignf(rp_data, photoFormat);
+    }
+    /**< Returns the Photo JPEG sign. */
+    static uint64_t jpegSign(RagePhotoData *rp_data) {
+        return ragephotodata_getphotosign(rp_data);
+    }
+    /**< Returns the Photo JPEG sign. */
+    uint64_t jpegSign(uint32_t photoFormat) const {
+        return ragephoto_getphotosignf(instance, photoFormat);
+    }
+    /**< Returns the Photo JPEG sign. */
+    uint64_t jpegSign() const {
+        return ragephoto_getphotosign(instance);
+    }
     /** Returns the Photo JPEG data size. */
     uint32_t jpegSize() const {
         return ragephoto_getphotosize(instance);

src/RagePhotoC.h

@@ -123,6 +123,28 @@ LIBRAGEPHOTO_C_BINDING const char* ragephoto_getphotojson(ragephoto_t instance);
 */
 LIBRAGEPHOTO_C_BINDING const char* ragephoto_getphotoheader(ragephoto_t instance);
 
+/** Returns the Photo JPEG sign.
+* \param instance \p ragephoto_t instance
+*/
+LIBRAGEPHOTO_C_BINDING uint64_t ragephoto_getphotosign(ragephoto_t instance);
+
+/** Returns the Photo JPEG sign.
+* \param instance \p ragephoto_t instance
+* \param photoFormat Photo Format (GTA V or RDR 2)
+*/
+LIBRAGEPHOTO_C_BINDING uint64_t ragephoto_getphotosignf(ragephoto_t instance, uint32_t photoFormat);
+
+/** Returns the Photo JPEG sign.
+* \param rp_data RagePhotoData object
+*/
+LIBRAGEPHOTO_C_BINDING uint64_t ragephotodata_getphotosign(RagePhotoData *rp_data);
+
+/** Returns the Photo JPEG sign.
+* \param rp_data RagePhotoData object
+* \param photoFormat Photo Format (GTA V or RDR 2)
+*/
+LIBRAGEPHOTO_C_BINDING uint64_t ragephotodata_getphotosignf(RagePhotoData *rp_data, uint32_t photoFormat);
+
 /** Returns the Photo JPEG data size.
 * \param instance \p ragephoto_t instance
 */