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tpm2: add tpm2_sym_alg_*_string() and tpm2_sym_mode_*_string()

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Add functions to convert between alg id and string name for symmetric
algorithms and symmetric encryption modes.
This commit is contained in:
Dan Streetman
2023-11-06 13:40:11 -05:00
parent 2eea1b8f2f
commit 2d784782bf
2 changed files with 62 additions and 0 deletions
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56
src/shared/tpm2-util.c
View File

@@ -6423,6 +6423,62 @@ int tpm2_asym_alg_from_string(const char *alg) {
return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown asymmetric algorithm name '%s'", alg);
}
const char *tpm2_sym_alg_to_string(uint16_t alg) {
switch (alg) {
#if HAVE_TPM2
case TPM2_ALG_AES:
return "aes";
#endif
default:
log_debug("Unknown symmetric algorithm id 0x%" PRIx16, alg);
return NULL;
}
}
int tpm2_sym_alg_from_string(const char *alg) {
#if HAVE_TPM2
if (strcaseeq_ptr(alg, "aes"))
return TPM2_ALG_AES;
#endif
return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown symmetric algorithm name '%s'", alg);
}
const char *tpm2_sym_mode_to_string(uint16_t mode) {
switch (mode) {
#if HAVE_TPM2
case TPM2_ALG_CTR:
return "ctr";
case TPM2_ALG_OFB:
return "ofb";
case TPM2_ALG_CBC:
return "cbc";
case TPM2_ALG_CFB:
return "cfb";
case TPM2_ALG_ECB:
return "ecb";
#endif
default:
log_debug("Unknown symmetric mode id 0x%" PRIx16, mode);
return NULL;
}
}
int tpm2_sym_mode_from_string(const char *mode) {
#if HAVE_TPM2
if (strcaseeq_ptr(mode, "ctr"))
return TPM2_ALG_CTR;
if (strcaseeq_ptr(mode, "ofb"))
return TPM2_ALG_OFB;
if (strcaseeq_ptr(mode, "cbc"))
return TPM2_ALG_CBC;
if (strcaseeq_ptr(mode, "cfb"))
return TPM2_ALG_CFB;
if (strcaseeq_ptr(mode, "ecb"))
return TPM2_ALG_ECB;
#endif
return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Unknown symmetric mode name '%s'", mode);
}
Tpm2Support tpm2_support(void) {
Tpm2Support support = TPM2_SUPPORT_NONE;
int r;

6
src/shared/tpm2-util.h
View File

@@ -412,6 +412,12 @@ int tpm2_hash_alg_from_string(const char *alg) _pure_;
const char *tpm2_asym_alg_to_string(uint16_t alg) _const_;
int tpm2_asym_alg_from_string(const char *alg) _pure_;
const char *tpm2_sym_alg_to_string(uint16_t alg) _const_;
int tpm2_sym_alg_from_string(const char *alg) _pure_;
const char *tpm2_sym_mode_to_string(uint16_t mode) _const_;
int tpm2_sym_mode_from_string(const char *mode) _pure_;
char *tpm2_pcr_mask_to_string(uint32_t mask);
extern const uint16_t tpm2_hash_algorithms[];