Loosely based on CONFIG_CRC32_VERIFY.
The sum to verify against can be in memory, in a variable, or the last parameter to the function directly.
Signed-off-by: Joe Hershberger joe.hershberger@ni.com --- common/cmd_md5sum.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+)
diff --git a/common/cmd_md5sum.c b/common/cmd_md5sum.c index b93dd9b..fbe0aba 100644 --- a/common/cmd_md5sum.c +++ b/common/cmd_md5sum.c @@ -1,4 +1,7 @@ /* + * (C) Copyright 2011 + * Joe Hershberger, National Instruments, joe.hershberger@ni.com + * * (C) Copyright 2000 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. * @@ -25,6 +28,96 @@ #include <command.h> #include <u-boot/md5.h>
+#ifdef CONFIG_MD5SUM_VERIFY +static int parse_verify_sum(char *verify_str, u8 *vsum) +{ + if (*verify_str == '*') { + u8 *ptr; + + ptr = (u8 *)simple_strtoul(verify_str + 1, NULL, 16); + memcpy(vsum, ptr, 16); + } else { + unsigned int i; + char *vsum_str; + + if (strlen(verify_str) == 32) + vsum_str = verify_str; + else { + vsum_str = getenv(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) = + simple_strtoul(vsum_str + (i * 2), NULL, 16); + *nullp = end; + } + } + return 0; +} + +int do_md5sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + ulong addr, len; + unsigned int i; + u8 output[16]; + u8 vsum[16]; + int verify = 0; + int ac; + char * const *av; + + if (argc < 3) + return CMD_RET_USAGE; + + av = argv + 1; + ac = argc - 1; + if (strcmp(*av, "-v") == 0) { + verify = 1; + av++; + ac--; + if (ac < 3) + return CMD_RET_USAGE; + } + + addr = simple_strtoul(*av++, NULL, 16); + len = simple_strtoul(*av++, NULL, 16); + + md5_wd((unsigned char *) addr, len, output, CHUNKSZ_MD5); + + if (!verify) { + printf("md5 for %08lx ... %08lx ==> ", addr, addr + len - 1); + for (i = 0; i < 16; i++) + printf("%02x", output[i]); + printf("\n"); + } 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(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { unsigned long addr, len; @@ -45,9 +138,21 @@ static int do_md5sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
return 0; } +#endif
+#ifdef CONFIG_MD5SUM_VERIFY +U_BOOT_CMD( + md5sum, 5, 1, do_md5sum, + "compute MD5 message digest", + "address count\n" + " - compute MD5 message digest\n" + "md5sum -v address count [*]sum\n" + " - verify md5sum of memory area" +); +#else U_BOOT_CMD( md5sum, 3, 1, do_md5sum, "compute MD5 message digest", "address count" ); +#endif