diff options
Diffstat (limited to 'include/rsa.h')
| -rw-r--r-- | include/rsa.h | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/include/rsa.h b/include/rsa.h index add4c78..a5680ab 100644 --- a/include/rsa.h +++ b/include/rsa.h @@ -15,6 +15,20 @@ #include <errno.h> #include <image.h> +/** + * struct rsa_public_key - holder for a public key + * + * An RSA public key consists of a modulus (typically called N), the inverse + * and R^2, where R is 2^(# key bits). + */ + +struct rsa_public_key { + uint len; /* len of modulus[] in number of uint32_t */ + uint32_t n0inv; /* -1 / modulus[0] mod 2^32 */ + uint32_t *modulus; /* modulus as little endian array */ + uint32_t *rr; /* R^2 as little endian array */ +}; + #if IMAGE_ENABLE_SIGN /** * sign() - calculate and return signature for given input data @@ -89,4 +103,14 @@ static inline int rsa_verify(struct image_sign_info *info, } #endif +#define RSA2048_BYTES (2048 / 8) +#define RSA4096_BYTES (4096 / 8) + +/* This is the minimum/maximum key size we support, in bits */ +#define RSA_MIN_KEY_BITS 2048 +#define RSA_MAX_KEY_BITS 4096 + +/* This is the maximum signature length that we support, in bits */ +#define RSA_MAX_SIG_BITS 4096 + #endif |