Split md5 function.
Signed-off-by: yzrh <yzrh@noema.org>
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a18de8f2ef
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9019a18449
4 changed files with 43 additions and 10 deletions
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@ -4,11 +4,11 @@
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# SPDX-License-Identifier: Apache-2.0
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#
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src = melon.c iconv.c zlib.c jbig2.c jpeg.c jp2.c \
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src = melon.c iconv.c zlib.c jbig2.c jpeg.c jp2.c md5.c \
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cnki_caj.c cnki_hn.c cnki_kdh.c cnki_outline_tree.c cnki_pdf.c \
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cnki_zlib.c cnki_jbig.c cnki_jbig_dec.c cnki_jbig2.c cnki.c \
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pdf_cnki.c pdf_get.c pdf_parser.c pdf_writer.c pdf.c
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inc = extern.h version.h iconv.h zlib.h jbig2.h jpeg.h jp2.h \
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inc = extern.h version.h iconv.h zlib.h jbig2.h jpeg.h jp2.h md5.h \
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cnki.h pdf_cnki.h cnki_jbig.h cnki_jbig_dec.h pdf.h
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obj = ${src:.c=.o}
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24
src/md5.c
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24
src/md5.c
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/*
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* Copyright (c) 2023, yzrh <yzrh@noema.org>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include <stdlib.h>
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#include <openssl/md5.h>
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int
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strmd5(unsigned char **dst, int *dst_size,
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const unsigned char * restrict src, int src_size)
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{
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*dst_size = MD5_DIGEST_LENGTH;
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*dst = malloc(*dst_size);
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if (*dst == NULL)
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return 1;
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MD5(src, src_size, *dst);
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return 0;
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}
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9
src/md5.h
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9
src/md5.h
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@ -0,0 +1,9 @@
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/*
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* Copyright (c) 2023, yzrh <yzrh@noema.org>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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int
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strmd5(unsigned char **dst, int *dst_size,
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const unsigned char * restrict src, int src_size);
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@ -5,11 +5,9 @@
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <openssl/md5.h>
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#include "md5.h"
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#include "pdf.h"
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int
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@ -144,11 +142,11 @@ pdf_dump_trailer(pdf_object_t **pdf, FILE **fp, int xref)
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buf_size = snprintf(buf, 64, "%lx%x", timestamp, size);
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#endif
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unsigned char str[64];
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memcpy(str, buf, 64);
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int fid_size;
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unsigned char *fid;
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unsigned char fid[MD5_DIGEST_LENGTH];
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MD5(str, buf_size, fid);
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if (strmd5(&fid, &fid_size, (unsigned char *) buf, buf_size) != 0)
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return 1;
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pdf_object_t *ptr = *pdf;
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while (ptr->next != NULL)
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@ -172,7 +170,7 @@ pdf_dump_trailer(pdf_object_t **pdf, FILE **fp, int xref)
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for (int i = 0; i < 2; i++) {
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fputs("<", *fp);
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for (int j = 0; j < MD5_DIGEST_LENGTH; j++)
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for (int j = 0; j < fid_size; j++)
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fprintf(*fp, "%02x", fid[j]);
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fputs(">", *fp);
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@ -191,5 +189,7 @@ pdf_dump_trailer(pdf_object_t **pdf, FILE **fp, int xref)
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fputs("%%EOF\n", *fp);
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free(fid);
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return 0;
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}
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