cryptsetup: Reduce log level for TPM mismatches

When we iterate over tokens we should not print mismatches as errors
but rather warnings. At the end there is still a summary with the
notice level (gated by found_some) which the user can relate to the
warnings.

src/cryptsetup/cryptsetup-tokens/luks2-tpm2.c

@@ -112,18 +112,18 @@ int acquire_luks2_key(
                         srk,
                         ret_decrypted_key);
         if (r == -EREMOTE)
-                return log_error_errno(r, "TPM key integrity check failed or NV index unusable. Key enrolled in superblock most likely does not belong to this TPM.");
+                return log_warning_errno(r, "TPM key integrity check failed or NV index unusable. Key enrolled in superblock most likely does not belong to this TPM.");
         if (r == -EILSEQ)
                 return log_error_errno(SYNTHETIC_ERRNO(ENOANO), "Bad PIN."); /* cryptsetup docs say we should return ENOANO on bad PIN */
         if (r == -ENOLCK)
                 return log_error_errno(r, "TPM is in dictionary attack lock-out mode.");
         if (ERRNO_IS_NEG_TPM2_UNSEAL_BAD_PCR(r)) {
-                log_error_errno(r, "TPM policy does not match current system state. Either system has been tempered with or policy out-of-date: %m");
+                log_warning_errno(r, "TPM policy does not match current system state. Either system has been tempered with or policy out-of-date: %m");
                 /* Normalize to -EPERM so callers don't confuse it with -ENOANO's "needs PIN" meaning. */
                 return -EPERM;
         }
         if (r == -ENOSTR)
-                return log_error_errno(r, "No signature for current PCR policy in TPM2 signature JSON, token does not apply to current boot state: %m");
+                return log_warning_errno(r, "No signature for current PCR policy in TPM2 signature JSON, token does not apply to current boot state: %m");
         if (r < 0)
                 return log_error_errno(r, "Failed to unseal secret using TPM2: %m");
 

src/shared/cryptsetup-tpm2.c

@@ -174,14 +174,14 @@ int acquire_tpm2_key(
                                 srk,
                                 ret_decrypted_key);
                 if (r == -EREMOTE)
-                        return log_error_errno(r, "TPM key integrity check failed or NV index unusable. Key enrolled in superblock most likely does not belong to this TPM.");
+                        return log_warning_errno(r, "TPM key integrity check failed or NV index unusable. Key enrolled in superblock most likely does not belong to this TPM.");
                 if (ERRNO_IS_NEG_TPM2_UNSEAL_BAD_PCR(r)) {
-                        log_error_errno(r, "TPM policy does not match current system state. Either system has been tempered with or policy out-of-date: %m");
+                        log_warning_errno(r, "TPM policy does not match current system state. Either system has been tempered with or policy out-of-date: %m");
                         /* Normalize to -EPERM so callers don't confuse it with -ENOANO's "needs PIN" meaning. */
                         return -EPERM;
                 }
                 if (r == -ENOSTR)
-                        return log_error_errno(r, "No signature for current PCR policy in TPM2 signature JSON, token does not apply to current boot state: %m");
+                        return log_warning_errno(r, "No signature for current PCR policy in TPM2 signature JSON, token does not apply to current boot state: %m");
                 if (r < 0)
                         return log_error_errno(r, "Failed to unseal secret using TPM2: %m");
 
@@ -232,14 +232,14 @@ int acquire_tpm2_key(
                                 srk,
                                 ret_decrypted_key);
                 if (r == -EREMOTE)
-                        return log_error_errno(r, "TPM key integrity check failed or NV index unusable. Key enrolled in superblock most likely does not belong to this TPM.");
+                        return log_warning_errno(r, "TPM key integrity check failed or NV index unusable. Key enrolled in superblock most likely does not belong to this TPM.");
                 if (ERRNO_IS_NEG_TPM2_UNSEAL_BAD_PCR(r)) {
-                        log_error_errno(r, "TPM policy does not match current system state. Either system has been tempered with or policy out-of-date: %m");
+                        log_warning_errno(r, "TPM policy does not match current system state. Either system has been tempered with or policy out-of-date: %m");
                         /* Normalize to -EPERM so callers don't confuse it with -ENOANO's "needs PIN" meaning. */
                         return -EPERM;
                 }
                 if (r == -ENOSTR)
-                        return log_error_errno(r, "No signature for current PCR policy in TPM2 signature JSON, token does not apply to current boot state: %m");
+                        return log_warning_errno(r, "No signature for current PCR policy in TPM2 signature JSON, token does not apply to current boot state: %m");
                 if (r == -ENOLCK)
                         return log_error_errno(r, "TPM is in dictionary attack lock-out mode.");
                 if (r == -EILSEQ) {