Fuzz introspector: privkey_fuzz
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues

Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique non-covered Complexity Unique Reachable Complexities Unique Reachable Functions All non-covered Complexity All Reachable Complexity Function Name Function Callsite Blocked Branch
209 209 1 :

['ssh_digest_buffer']

209 607 webauthn_check_prepare_hash call site: 00000 /src/hpn-ssh/ssh-ecdsa-sk.c:217
158 158 5 :

['do_log', 'match_pattern_list', 'getpid', 'strlcpy', 'strrchr']

158 158 sshlogv call site: 00016 /src/hpn-ssh/log.c:469
82 243 4 :

['xmss_sign_open', 'malloc', 'sshkey_xmss_params', 'sshlog']

82 452 ssh_xmss_verify call site: 00000 /src/hpn-ssh/ssh-xmss.c:314
13 13 1 :

['rsa_hash_id_from_keyname']

23 674 ssh_rsa_verify call site: 00000 /src/hpn-ssh/ssh-rsa.c:504
2 193 2 :

['sshbuf_ptr', 'timingsafe_bcmp']

2 193 sshbuf_cmp call site: 00000 /src/hpn-ssh/sshbuf-misc.c:245
2 2 1 :

['EVP_PKEY_get1_RSA']

30 1010 ssh_rsa_deserialize_private call site: 00000 /src/hpn-ssh/ssh-rsa.c:243
2 2 1 :

['BN_clear_free']

2 2 sshbuf_get_bignum2 call site: 00000 /src/hpn-ssh/sshbuf-getput-crypto.c:48
2 2 1 :

['munmap']

2 2 sshkey_prekey_free call site: 00116 /src/hpn-ssh/sshkey.c:781
0 726 1 :

['sshbuf_put_u8']

0 731 sshbuf_dtob64 call site: 00000 /src/hpn-ssh/sshbuf-misc.c:111
0 225 1 :

['sshkey_free']

0 225 sshkey_new call site: 00097 /src/hpn-ssh/sshkey.c:734
0 225 1 :

['cert_free']

0 225 cert_new call site: 00099 /src/hpn-ssh/sshkey.c:699
0 199 1 :

['sshbuf_free']

0 199 sshbuf_froms call site: 00070 /src/hpn-ssh/sshbuf-getput-basic.c:561

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 sshbuf_from [function] [call site] 00001
2 calloc [call site] 00002
1 sshkey_private_deserialize [function] [call site] 00003
2 sshbuf_get_cstring [function] [call site] 00004
3 sshbuf_peek_string_direct [function] [call site] 00005
4 sshbuf_ptr [function] [call site] 00006
5 sshbuf_check_sanity [function] [call site] 00007
6 ssh_signal [function] [call site] 00008
7 memset [call site] 00009
7 sigfillset [call site] 00010
7 sigaction [call site] 00011
7 strsignal [call site] 00012
7 __errno_location [call site] 00013
7 strerror [call site] 00014
7 sshlog [function] [call site] 00015
8 sshlogv [function] [call site] 00016
9 strrchr [call site] 00017
9 getpid [call site] 00018
9 snprintf [call site] 00019
9 match_pattern_list [function] [call site] 00020
10 strlen [call site] 00021
10 __ctype_b_loc [call site] 00022
10 tolower [call site] 00023
10 match_pattern [function] [call site] 00024
11 match_pattern [function] [call site] 00025
12 match_pattern [function] [call site] 00026
9 snprintf [call site] 00027
9 snprintf [call site] 00028
9 strlcpy [function] [call site] 00029
9 do_log [function] [call site] 00030
10 __errno_location [call site] 00031
10 snprintf [call site] 00032
10 vsnprintf [call site] 00033
10 vsnprintf [call site] 00034
10 snprintf [call site] 00035
10 strlcpy [function] [call site] 00036
10 strnvis [function] [call site] 00037
11 __ctype_b_loc [call site] 00038
11 vis [function] [call site] 00039
12 __ctype_b_loc [call site] 00040
12 __ctype_b_loc [call site] 00041
11 vis [function] [call site] 00042
10 snprintf [call site] 00043
10 strlen [call site] 00044
10 write [call site] 00045
10 openlog [call site] 00046
10 syslog [call site] 00047
10 closelog [call site] 00048
10 __errno_location [call site] 00049
6 raise [call site] 00050
4 sshbuf_len [function] [call site] 00051
5 sshbuf_check_sanity [function] [call site] 00052
4 sshbuf_len [function] [call site] 00053
3 memchr [call site] 00054
3 sshbuf_get_string_direct [function] [call site] 00055
4 sshbuf_peek_string_direct [function] [call site] 00056
4 sshbuf_consume [function] [call site] 00057
5 sshbuf_check_sanity [function] [call site] 00058
5 sshbuf_len [function] [call site] 00059
2 sshkey_type_from_name [function] [call site] 00060
3 type_from_name [function] [call site] 00061
4 strcmp [call site] 00062
4 strcasecmp [call site] 00063
2 sshkey_type_is_cert [function] [call site] 00064
3 sshkey_impl_from_type [function] [call site] 00065
2 sshkey_froms [function] [call site] 00066
3 sshbuf_froms [function] [call site] 00067
4 sshbuf_peek_string_direct [function] [call site] 00068
4 sshbuf_from [function] [call site] 00069
4 sshbuf_consume [function] [call site] 00070
4 sshbuf_set_parent [function] [call site] 00071
5 sshbuf_check_sanity [function] [call site] 00072
5 sshbuf_check_sanity [function] [call site] 00073
4 sshbuf_free [function] [call site] 00074
5 sshbuf_check_sanity [function] [call site] 00075
5 sshbuf_free [function] [call site] 00076
6 freezero [function] [call site] 00077
7 explicit_bzero [call site] 00078
6 freezero [function] [call site] 00079
3 sshkey_from_blob_internal [function] [call site] 00080
4 sshbuf_fromb [function] [call site] 00081
5 sshbuf_check_sanity [function] [call site] 00082
5 sshbuf_ptr [function] [call site] 00083
5 sshbuf_len [function] [call site] 00084
5 sshbuf_from [function] [call site] 00085
5 sshbuf_set_parent [function] [call site] 00086
5 sshbuf_free [function] [call site] 00087
4 sshbuf_get_cstring [function] [call site] 00088
4 sshkey_type_from_name [function] [call site] 00089
4 sshkey_type_is_cert [function] [call site] 00090
4 sshkey_impl_from_type [function] [call site] 00091
4 sshkey_new [function] [call site] 00092
5 sshkey_impl_from_type [function] [call site] 00093
5 calloc [call site] 00094
5 sshkey_is_cert [function] [call site] 00095
6 sshkey_type_is_cert [function] [call site] 00096
5 cert_new [function] [call site] 00097
6 calloc [call site] 00098
6 sshbuf_new_label [function] [call site] 00099
7 calloc [call site] 00100
7 strncpy [call site] 00101
7 calloc [call site] 00102
6 sshbuf_new_label [function] [call site] 00103
6 sshbuf_new_label [function] [call site] 00104
6 cert_free [function] [call site] 00105
7 sshbuf_free [function] [call site] 00106
7 sshbuf_free [function] [call site] 00107
7 sshbuf_free [function] [call site] 00108
7 sshkey_free [function] [call site] 00109
8 sshkey_free_contents [function] [call site] 00110
9 sshkey_impl_from_type [function] [call site] 00111
9 sshkey_is_cert [function] [call site] 00112
9 cert_free [function] [call site] 00113
10 freezero [function] [call site] 00114
9 freezero [function] [call site] 00115
9 sshkey_prekey_free [function] [call site] 00116
10 munmap [call site] 00117
8 freezero [function] [call site] 00118
5 sshkey_free [function] [call site] 00119
4 sshkey_type_is_cert [function] [call site] 00120
4 sshbuf_get_string_direct [function] [call site] 00121
4 sshkey_is_cert [function] [call site] 00122
4 cert_parse [function] [call site] 00123
5 sshbuf_putb [function] [call site] 00124
6 sshbuf_ptr [function] [call site] 00125
6 sshbuf_len [function] [call site] 00126
6 sshbuf_put [function] [call site] 00127
7 sshbuf_reserve [function] [call site] 00128
8 sshbuf_allocate [function] [call site] 00129
9 sshbuf_check_reserve [function] [call site] 00130
10 sshbuf_check_sanity [function] [call site] 00131
9 sshbuf_maybe_pack [function] [call site] 00132
9 recallocarray [function] [call site] 00133
10 calloc [call site] 00134
10 __errno_location [call site] 00135
10 __errno_location [call site] 00136
10 getpagesize [call site] 00137
10 memset [call site] 00138
10 memset [call site] 00139
10 explicit_bzero [call site] 00140
9 sshbuf_check_reserve [function] [call site] 00141
5 sshbuf_get_u64 [function] [call site] 00142
6 sshbuf_ptr [function] [call site] 00143
6 sshbuf_consume [function] [call site] 00144
5 sshbuf_get_u32 [function] [call site] 00145
6 sshbuf_ptr [function] [call site] 00146
6 sshbuf_consume [function] [call site] 00147
5 sshbuf_get_cstring [function] [call site] 00148
5 sshbuf_froms [function] [call site] 00149
5 sshbuf_get_u64 [function] [call site] 00150
5 sshbuf_get_u64 [function] [call site] 00151
5 sshbuf_froms [function] [call site] 00152
5 sshbuf_froms [function] [call site] 00153
5 sshbuf_get_string_direct [function] [call site] 00154
5 sshbuf_froms [function] [call site] 00155
5 sshbuf_len [function] [call site] 00156
5 sshbuf_get_string [function] [call site] 00157
6 sshbuf_get_string_direct [function] [call site] 00158
5 sshbuf_len [function] [call site] 00159
5 sshbuf_get_cstring [function] [call site] 00160
5 recallocarray [function] [call site] 00161
5 sshbuf_putb [function] [call site] 00162
5 sshbuf_putb [function] [call site] 00163
5 sshbuf_len [function] [call site] 00164
5 sshbuf_get_string_direct [function] [call site] 00165
5 sshbuf_get_string_direct [function] [call site] 00166
5 sshbuf_reset [function] [call site] 00167
6 sshbuf_check_sanity [function] [call site] 00168
6 recallocarray [function] [call site] 00169
6 explicit_bzero [call site] 00170
5 sshbuf_len [function] [call site] 00171
5 sshbuf_get_string_direct [function] [call site] 00172
5 sshbuf_get_string_direct [function] [call site] 00173
5 sshbuf_reset [function] [call site] 00174
5 sshkey_from_blob_internal [function] [call site] 00175
6 sshbuf_len [function] [call site] 00176
6 sshbuf_free [function] [call site] 00177
6 sshkey_free [function] [call site] 00178
5 sshkey_type_is_valid_ca [function] [call site] 00179
6 sshkey_impl_from_type [function] [call site] 00180
5 sshbuf_ptr [function] [call site] 00181
5 sshkey_verify [function] [call site] 00182
6 sshkey_impl_from_key [function] [call site] 00183
7 sshkey_impl_from_type_nid [function] [call site] 00184
5 sshkey_get_sigtype [function] [call site] 00185
6 sshbuf_from [function] [call site] 00186
6 sshbuf_get_cstring [function] [call site] 00187
6 sshbuf_free [function] [call site] 00188
5 sshbuf_free [function] [call site] 00189
5 sshbuf_free [function] [call site] 00190
5 sshbuf_free [function] [call site] 00191
5 sshbuf_free [function] [call site] 00192
3 sshbuf_free [function] [call site] 00193
2 sshkey_ecdsa_nid_from_name [function] [call site] 00194
3 key_type_is_ecdsa_variant [function] [call site] 00195
3 strcmp [call site] 00196
2 sshkey_new [function] [call site] 00197
2 sshkey_impl_from_type [function] [call site] 00198
2 strcmp [call site] 00199
2 memcmp [call site] 00200
2 sshkey_free [function] [call site] 00201
1 sshkey_free [function] [call site] 00202
1 sshbuf_free [function] [call site] 00203