73 lines
1.7 KiB
C
73 lines
1.7 KiB
C
#include <fxg1a.h>
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#include <stdio.h>
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#include <string.h>
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#include <endianness.h>
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/* sign(): Sign header by filling fixed fields and checksums */
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void sign(struct g1a *g1a, size_t size)
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{
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struct header *header = &g1a->header;
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/* Fixed elements */
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memcpy(header->magic, "USBPower", 8);
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header->mcs_type = 0xf3;
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memcpy(header->seq1, "\x00\x10\x00\x10\x00", 5);
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header->seq2 = 0x01;
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header->filesize_be1 = htobe32(size);
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header->filesize_be2 = htobe32(size);
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/* Control bytes and checksums */
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header->control1 = size + 0x41;
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header->control2 = size + 0xb8;
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header->checksum = htobe16(checksum(g1a, size));
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}
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/* edit_name(): Set application name */
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void edit_name(struct g1a *g1a, const char *name)
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{
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memset(g1a->header.name, 0, 8);
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if(!name) return;
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for(int i = 0; name[i] && i < 8; i++)
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g1a->header.name[i] = name[i];
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}
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/* edit_internal(): Set internal name */
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void edit_internal(struct g1a *g1a, const char *internal)
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{
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memset(g1a->header.internal, 0, 8);
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if(!internal) return;
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for(int i = 0; internal[i] && i < 8; i++)
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g1a->header.internal[i] = internal[i];
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}
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/* edit_version(): Set version string */
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void edit_version(struct g1a *g1a, const char *version)
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{
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memset(g1a->header.version, 0, 10);
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if(!version) return;
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for(int i = 0; version[i] && i < 10; i++)
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g1a->header.version[i] = version[i];
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}
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/* edit_date(): Set build date */
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void edit_date(struct g1a *g1a, const char *date)
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{
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memset(g1a->header.date, 0, 14);
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if(!date) return;
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for(int i = 0; date[i] && i < 14; i++)
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g1a->header.date[i] = date[i];
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}
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/* edit_icon(): Set icon from monochrome bitmap */
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void edit_icon(struct g1a *g1a, uint8_t const *mono)
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{
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memcpy(g1a->header.icon, mono, 68);
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}
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