diff options
Diffstat (limited to 'host/lib/host_key2.c')
| -rw-r--r-- | host/lib/host_key2.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/host/lib/host_key2.c b/host/lib/host_key2.c index 5849cf76..6984c67f 100644 --- a/host/lib/host_key2.c +++ b/host/lib/host_key2.c @@ -16,7 +16,7 @@ #include "2sha.h" #include "2sysincludes.h" #include "host_common.h" -#include "host_key2.h" +#include "host_key21.h" #include "host_key.h" #include "host_misc.h" #include "vb2_common.h" @@ -296,3 +296,34 @@ vb2_error_t vb2_packed_key_looks_ok(const struct vb2_packed_key *key, return VB2_SUCCESS; } + +vb2_error_t vb2_unpack_key_data(struct vb2_public_key *key, + const uint8_t *key_data, uint32_t key_size) +{ + const uint32_t *buf32 = (const uint32_t *)key_data; + uint32_t expected_key_size = vb2_packed_key_size(key->sig_alg); + + /* Make sure buffer is the correct length */ + if (!expected_key_size || expected_key_size != key_size) { + VB2_DEBUG("Wrong key size for algorithm\n"); + return VB2_ERROR_UNPACK_KEY_SIZE; + } + + /* Check for alignment */ + if (!vb2_aligned(buf32, sizeof(uint32_t))) + return VB2_ERROR_UNPACK_KEY_ALIGN; + + key->arrsize = buf32[0]; + + /* Sanity check key array size */ + if (key->arrsize * sizeof(uint32_t) != vb2_rsa_sig_size(key->sig_alg)) + return VB2_ERROR_UNPACK_KEY_ARRAY_SIZE; + + key->n0inv = buf32[1]; + + /* Arrays point inside the key data */ + key->n = buf32 + 2; + key->rr = buf32 + 2 + key->arrsize; + + return VB2_SUCCESS; +} |