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| author | Lennart Poettering <lennart@poettering.net> | 2022-08-19 22:18:31 +0200 |
|---|---|---|
| committer | Lennart Poettering <lennart@poettering.net> | 2022-09-08 16:34:27 +0200 |
| commit | 4d5cc0d45322e71cf02cbef3022ff745e4bb3433 (patch) | |
| tree | f9ea547f4957ec9e4b229ff88158192bd660ded6 /src | |
| parent | tpm2-util: add common parser for the LUKS2 TPM2 JSON structure (diff) | |
| download | systemd-4d5cc0d45322e71cf02cbef3022ff745e4bb3433.tar.xz systemd-4d5cc0d45322e71cf02cbef3022ff745e4bb3433.zip | |
tpm2-util: add helper for formatting PCR masks as string
Diffstat (limited to '')
| -rw-r--r-- | src/shared/tpm2-util.c | 19 | ||||
| -rw-r--r-- | src/shared/tpm2-util.h | 2 |
2 files changed, 21 insertions, 0 deletions
diff --git a/src/shared/tpm2-util.c b/src/shared/tpm2-util.c index f5b97fae73..7c9eb77f95 100644 --- a/src/shared/tpm2-util.c +++ b/src/shared/tpm2-util.c @@ -2160,3 +2160,22 @@ int tpm2_load_pcr_public_key(const char *path, void **ret_pubkey, size_t *ret_pu return 0; } + +int pcr_mask_to_string(uint32_t mask, char **ret) { + _cleanup_free_ char *buf = NULL; + int r; + + assert(ret); + + for (unsigned i = 0; i < TPM2_PCRS_MAX; i++) { + if (!(mask & (UINT32_C(1) << i))) + continue; + + r = strextendf_with_separator(&buf, "+", "%u", i); + if (r < 0) + return r; + } + + *ret = TAKE_PTR(buf); + return 0; +} diff --git a/src/shared/tpm2-util.h b/src/shared/tpm2-util.h index 2ff7c0eb63..554ca58df6 100644 --- a/src/shared/tpm2-util.h +++ b/src/shared/tpm2-util.h @@ -146,3 +146,5 @@ int tpm2_parse_pcr_argument(const char *arg, uint32_t *mask); int tpm2_load_pcr_signature(const char *path, JsonVariant **ret); int tpm2_load_pcr_public_key(const char *path, void **ret_pubkey, size_t *ret_pubkey_size); + +int pcr_mask_to_string(uint32_t mask, char **ret); |