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| author | Roberto Sassu <roberto.sassu@huawei.com> | 2021-05-28 09:38:06 +0200 |
|---|---|---|
| committer | Mimi Zohar <zohar@linux.ibm.com> | 2021-06-01 15:17:30 -0400 |
| commit | cde1391a0b4014b0e8fc09cd316272f478b54c0f (patch) | |
| tree | 9598df4210cc423975fbf550b991dea99d6dd167 /security/integrity | |
| parent | 5a25d8ceb8611c06797b74e22d04af2b9fefd130 (diff) | |
| download | lwn-cde1391a0b4014b0e8fc09cd316272f478b54c0f.tar.gz lwn-cde1391a0b4014b0e8fc09cd316272f478b54c0f.zip | |
ima: Add ima_show_template_uint() template library function
This patch introduces the new function ima_show_template_uint(). This can
be used for showing integers of different sizes in ASCII format. The
function ima_show_template_data_ascii() automatically determines how to
print a stored integer by checking the integer size.
If integers have been written in canonical format,
ima_show_template_data_ascii() calls the appropriate leXX_to_cpu() function
to correctly display the value.
Signed-off-by: Roberto Sassu <roberto.sassu@huawei.com>
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Diffstat (limited to 'security/integrity')
| -rw-r--r-- | security/integrity/ima/ima_template_lib.c | 38 | ||||
| -rw-r--r-- | security/integrity/ima/ima_template_lib.h | 2 |
2 files changed, 39 insertions, 1 deletions
diff --git a/security/integrity/ima/ima_template_lib.c b/security/integrity/ima/ima_template_lib.c index 4314d9a3514c..f23296c33da1 100644 --- a/security/integrity/ima/ima_template_lib.c +++ b/security/integrity/ima/ima_template_lib.c @@ -24,7 +24,8 @@ enum data_formats { DATA_FMT_DIGEST = 0, DATA_FMT_DIGEST_WITH_ALGO, DATA_FMT_STRING, - DATA_FMT_HEX + DATA_FMT_HEX, + DATA_FMT_UINT }; static int ima_write_template_field_data(const void *data, const u32 datalen, @@ -88,6 +89,35 @@ static void ima_show_template_data_ascii(struct seq_file *m, case DATA_FMT_STRING: seq_printf(m, "%s", buf_ptr); break; + case DATA_FMT_UINT: + switch (field_data->len) { + case sizeof(u8): + seq_printf(m, "%u", *(u8 *)buf_ptr); + break; + case sizeof(u16): + if (ima_canonical_fmt) + seq_printf(m, "%u", + le16_to_cpu(*(u16 *)buf_ptr)); + else + seq_printf(m, "%u", *(u16 *)buf_ptr); + break; + case sizeof(u32): + if (ima_canonical_fmt) + seq_printf(m, "%u", + le32_to_cpu(*(u32 *)buf_ptr)); + else + seq_printf(m, "%u", *(u32 *)buf_ptr); + break; + case sizeof(u64): + if (ima_canonical_fmt) + seq_printf(m, "%llu", + le64_to_cpu(*(u64 *)buf_ptr)); + else + seq_printf(m, "%llu", *(u64 *)buf_ptr); + break; + default: + break; + } default: break; } @@ -163,6 +193,12 @@ void ima_show_template_buf(struct seq_file *m, enum ima_show_type show, ima_show_template_field_data(m, show, DATA_FMT_HEX, field_data); } +void ima_show_template_uint(struct seq_file *m, enum ima_show_type show, + struct ima_field_data *field_data) +{ + ima_show_template_field_data(m, show, DATA_FMT_UINT, field_data); +} + /** * ima_parse_buf() - Parses lengths and data from an input buffer * @bufstartp: Buffer start address. diff --git a/security/integrity/ima/ima_template_lib.h b/security/integrity/ima/ima_template_lib.h index f4b2a2056d1d..54b67c80b315 100644 --- a/security/integrity/ima/ima_template_lib.h +++ b/security/integrity/ima/ima_template_lib.h @@ -27,6 +27,8 @@ void ima_show_template_sig(struct seq_file *m, enum ima_show_type show, struct ima_field_data *field_data); void ima_show_template_buf(struct seq_file *m, enum ima_show_type show, struct ima_field_data *field_data); +void ima_show_template_uint(struct seq_file *m, enum ima_show_type show, + struct ima_field_data *field_data); int ima_parse_buf(void *bufstartp, void *bufendp, void **bufcurp, int maxfields, struct ima_field_data *fields, int *curfields, unsigned long *len_mask, int enforce_mask, char *bufname); |