diff options
Diffstat (limited to 'host/lib/include/util_misc.h')
| -rw-r--r-- | host/lib/include/util_misc.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/host/lib/include/util_misc.h b/host/lib/include/util_misc.h index 788929de..0a6ed4c4 100644 --- a/host/lib/include/util_misc.h +++ b/host/lib/include/util_misc.h @@ -9,8 +9,33 @@ #define VBOOT_REFERENCE_UTIL_MISC_H_ #include "vboot_struct.h" +struct rsa_st; /* Prints the sha1sum of the given VbPublicKey to stdout. */ void PrintPubKeySha1Sum(VbPublicKey* key); +/* + * Our packed RSBPublicKey buffer (historically in files ending with ".keyb", + * but also the part of VbPublicKey and struct vb2_packed_key that is + * referenced by .key_offset) has this binary format: + * + * struct { + * uint32_t nwords; // size of RSA key in 32-bit words + * uint32_t N0inv; // -1 / N[0] mod 2^32 + * uint32_t modulus[nwords]; // modulus as a little endian array + * uint32_t R2[nwords]; // R^2 as little endian array + * }; + * + * This function allocates and extracts that binary structure directly + * from the RSA private key, rather than from a file. + * + * @param rsa_private_key RSA private key (duh) + * @param keyb_data Pointer to newly allocated binary blob + * @param keyb_size Size of newly allocated binary blob + * + * @return 0 on success, non-zero if unable to allocate enough memory. + */ +int vb_keyb_from_rsa(struct rsa_st *rsa_private_key, + uint8_t **keyb_data, uint32_t *keyb_size); + #endif /* VBOOT_REFERENCE_UTIL_MISC_H_ */ |