diff options
Diffstat (limited to 'asn1_internal.h')
| -rw-r--r-- | asn1_internal.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/asn1_internal.h b/asn1_internal.h index fe2f293..3de8bd6 100644 --- a/asn1_internal.h +++ b/asn1_internal.h @@ -151,6 +151,16 @@ extern hal_error_t hal_asn1_decode_pkcs8_encryptedprivatekeyinfo(const uint8_t * extern hal_error_t hal_asn1_guess_key_type(hal_key_type_t *type, hal_curve_name_t *curve, const uint8_t *const der, const size_t der_len); +/* + * Peek ahead for an OPTIONAL attribute. + */ + +static inline int hal_asn1_peek(const uint8_t tag, + const uint8_t * const der, size_t der_max) +{ + return der != NULL && der_max > 0 && der[0] == tag; +} + #endif /* _HAL_ASN1_INTERNAL_H_ */ /* |