[PATCH v1] cmd: md5sum: use hash_command

[Igor Opaniuk]

From: Igor Opaniuk <igor.opaniuk at gmail.com>

Drop old implementation and use hash_command() instead, as
how it's currently done for crc32 and sha1sum cmds.

Test:
=> md5sum 0x60000000 0x200
md5 for 60000000 ... 600001ff ==> e6bbbe95f5b41996f4a9b9af7bbd4050

Signed-off-by: Igor Opaniuk <igor.opaniuk at gmail.com>
---

 cmd/md5sum.c | 149 ++++-----------------------------------------------
 1 file changed, 9 insertions(+), 140 deletions(-)

diff --git a/cmd/md5sum.c b/cmd/md5sum.c
index 0f0e1d3dd68..618265e8d50 100644
--- a/cmd/md5sum.c
+++ b/cmd/md5sum.c
@@ -7,7 +7,6 @@
  * Wolfgang Denk, DENX Software Engineering, wd at denx.de.
  */
 
-#include <common.h>
 #include <command.h>
 #include <env.h>
 #include <image.h>
@@ -15,158 +14,28 @@
 #include <u-boot/md5.h>
 #include <asm/io.h>
 
-/*
- * Store the resulting sum to an address or variable
- */
-static void store_result(const u8 *sum, const char *dest)
-{
-	unsigned int i;
-
-	if (*dest == '*') {
-		u8 *ptr;
-
-		ptr = (u8 *)hextoul(dest + 1, NULL);
-		for (i = 0; i < 16; i++)
-			*ptr++ = sum[i];
-	} else {
-		char str_output[33];
-		char *str_ptr = str_output;
-
-		for (i = 0; i < 16; i++) {
-			sprintf(str_ptr, "%02x", sum[i]);
-			str_ptr += 2;
-		}
-		env_set(dest, str_output);
-	}
-}
-
-#ifdef CONFIG_MD5SUM_VERIFY
-static int parse_verify_sum(char *verify_str, u8 *vsum)
-{
-	if (*verify_str == '*') {
-		u8 *ptr;
-
-		ptr = (u8 *)hextoul(verify_str + 1, NULL);
-		memcpy(vsum, ptr, 16);
-	} else {
-		unsigned int i;
-		char *vsum_str;
-
-		if (strlen(verify_str) == 32)
-			vsum_str = verify_str;
-		else {
-			vsum_str = env_get(verify_str);
-			if (vsum_str == NULL || strlen(vsum_str) != 32)
-				return 1;
-		}
-
-		for (i = 0; i < 16; i++) {
-			char *nullp = vsum_str + (i + 1) * 2;
-			char end = *nullp;
-
-			*nullp = '\0';
-			*(u8 *)(vsum + i) =
-				hextoul(vsum_str + (i * 2), NULL);
-			*nullp = end;
-		}
-	}
-	return 0;
-}
-
-int do_md5sum(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
+static int do_md5sum(struct cmd_tbl *cmdtp, int flag, int argc,
+		     char *const argv[])
 {
-	ulong addr, len;
-	unsigned int i;
-	u8 output[16];
-	u8 vsum[16];
-	int verify = 0;
+	int flags = HASH_FLAG_ENV;
 	int ac;
-	char * const *av;
-	void *buf;
+	char *const *av;
 
 	if (argc < 3)
 		return CMD_RET_USAGE;
 
 	av = argv + 1;
 	ac = argc - 1;
-	if (strcmp(*av, "-v") == 0) {
-		verify = 1;
+	if (IS_ENABLED(CONFIG_MD5SUM_VERIFY) && strcmp(*av, "-v") == 0) {
+		flags |= HASH_FLAG_VERIFY;
 		av++;
 		ac--;
-		if (ac < 3)
-			return CMD_RET_USAGE;
 	}
 
-	addr = hextoul(*av++, NULL);
-	len = hextoul(*av++, NULL);
-
-	buf = map_sysmem(addr, len);
-	md5_wd(buf, len, output, CHUNKSZ_MD5);
-	unmap_sysmem(buf);
-
-	if (!verify) {
-		printf("md5 for %08lx ... %08lx ==> ", addr, addr + len - 1);
-		for (i = 0; i < 16; i++)
-			printf("%02x", output[i]);
-		printf("\n");
-
-		if (ac > 2)
-			store_result(output, *av);
-	} else {
-		char *verify_str = *av++;
-
-		if (parse_verify_sum(verify_str, vsum)) {
-			printf("ERROR: %s does not contain a valid md5 sum\n",
-				verify_str);
-			return 1;
-		}
-		if (memcmp(output, vsum, 16) != 0) {
-			printf("md5 for %08lx ... %08lx ==> ", addr,
-				addr + len - 1);
-			for (i = 0; i < 16; i++)
-				printf("%02x", output[i]);
-			printf(" != ");
-			for (i = 0; i < 16; i++)
-				printf("%02x", vsum[i]);
-			printf(" ** ERROR **\n");
-			return 1;
-		}
-	}
-
-	return 0;
-}
-#else
-static int do_md5sum(struct cmd_tbl *cmdtp, int flag, int argc,
-		     char *const argv[])
-{
-	unsigned long addr, len;
-	unsigned int i;
-	u8 output[16];
-	void *buf;
-
-	if (argc < 3)
-		return CMD_RET_USAGE;
-
-	addr = hextoul(argv[1], NULL);
-	len = hextoul(argv[2], NULL);
-
-	buf = map_sysmem(addr, len);
-	md5_wd(buf, len, output, CHUNKSZ_MD5);
-	unmap_sysmem(buf);
-
-	printf("md5 for %08lx ... %08lx ==> ", addr, addr + len - 1);
-	for (i = 0; i < 16; i++)
-		printf("%02x", output[i]);
-	printf("\n");
-
-	if (argc > 3)
-		store_result(output, argv[3]);
-
-	return 0;
+	return hash_command("md5", flags, cmdtp, flag, ac, av);
 }
-#endif
 
-#ifdef CONFIG_MD5SUM_VERIFY
+#if IS_ENABLED(CONFIG_MD5SUM_VERIFY)
 U_BOOT_CMD(
 	md5sum,	5,	1,	do_md5sum,
 	"compute MD5 message digest",
@@ -182,4 +51,4 @@ U_BOOT_CMD(
 	"address count [[*]sum]\n"
 		"    - compute MD5 message digest [save to sum]"
 );
-#endif
+#endif /* IS_ENABLED(CONFIG_MD5SUM_VERIFY) */
-- 
2.34.1