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_sha1sum.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 105 insertions(+)
diff --git a/common/cmd_sha1sum.c b/common/cmd_sha1sum.c index 2713a14..fbb99ea 100644 --- a/common/cmd_sha1sum.c +++ b/common/cmd_sha1sum.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 <sha1.h>
+#ifdef CONFIG_SHA1SUM_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, 20); + } else { + unsigned int i; + char *vsum_str; + + if (strlen(verify_str) == 40) + vsum_str = verify_str; + else { + vsum_str = getenv(verify_str); + if (vsum_str == NULL || strlen(vsum_str) != 40) + return 1; + } + + for (i = 0; i < 20; 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_sha1sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + ulong addr, len; + unsigned int i; + u8 output[20]; + u8 vsum[20]; + 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); + + sha1_csum_wd((unsigned char *) addr, len, output, CHUNKSZ_SHA1); + + if (!verify) { + printf("SHA1 for %08lx ... %08lx ==> ", addr, addr + len - 1); + for (i = 0; i < 20; 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 SHA1 sum\n", + verify_str); + return 1; + } + if (memcmp(output, vsum, 20) != 0) { + printf("SHA1 for %08lx ... %08lx ==> ", addr, + addr + len - 1); + for (i = 0; i < 20; i++) + printf("%02x", output[i]); + printf(" != "); + for (i = 0; i < 20; i++) + printf("%02x", vsum[i]); + printf(" ** ERROR **\n"); + return 1; + } + } + + return 0; +} +#else static int do_sha1sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { unsigned long addr, len; @@ -45,9 +138,21 @@ static int do_sha1sum(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
return 0; } +#endif
+#ifdef CONFIG_SHA1SUM_VERIFY +U_BOOT_CMD( + sha1sum, 5, 1, do_sha1sum, + "compute SHA1 message digest", + "address count\n" + " - compute SHA1 message digest\n" + "sha1sum -v address count [*]sum\n" + " - verify sha1sum of memory area" +); +#else U_BOOT_CMD( sha1sum, 3, 1, do_sha1sum, "compute SHA1 message digest", "address count" ); +#endif