diff options
Diffstat (limited to 'common.c')
| -rw-r--r-- | common.c | 74 |
1 files changed, 64 insertions, 10 deletions
@@ -227,9 +227,8 @@ hash_and_print(const char *path, size_t hashlen, int decode_hex, char newline, i return 0; } - -void -parse_salt(uint_least8_t *salt, const char *s, size_t required_length) +static void +parse_salt_or_pepper(uint_least8_t *out, const char *s, size_t required_length, const char *type) { size_t i; @@ -239,8 +238,8 @@ parse_salt(uint_least8_t *salt, const char *s, size_t required_length) if (!isxdigit(s[0]) || !isxdigit(s[1])) goto not_hexadecimal; - salt[i] = (uint_least8_t)((((s[0] & 15) + (s[0] > '9' ? 9 : 0)) << 4) | - (s[1] & 15) + (s[1] > '9' ? 9 : 0)); + out[i] = (uint_least8_t)((((s[0] & 15) + (s[0] > '9' ? 9 : 0)) << 4) | + (s[1] & 15) + (s[1] > '9' ? 9 : 0)); } if (*s) @@ -249,16 +248,71 @@ parse_salt(uint_least8_t *salt, const char *s, size_t required_length) return; not_hexadecimal: - fprintf(stderr, "%s: specified salt contains non-hexadecimal-digit character\n", argv0); + fprintf(stderr, "%s: specified %s contains non-hexadecimal-digit character\n", argv0, type); exit(2); too_short: - fprintf(stderr, "%s: specified salt is shorter than expected, should be %zu hexadecimal digits\n", - argv0, required_length * 2); + fprintf(stderr, "%s: specified %s is shorter than expected, should be %zu hexadecimal digits\n", + argv0, type, required_length * 2); + exit(2); + +too_long: + fprintf(stderr, "%s: specified %s is longer than expected, should be %zu hexadecimal digits\n", + argv0, type, required_length * 2); + exit(2); +} + +void +parse_salt(uint_least8_t *salt, const char *s, size_t required_length) +{ + parse_salt_or_pepper(salt, s, required_length, "salt"); +} + +void +parse_pepper(uint_least8_t *pepper, const char *s, size_t required_length) +{ + parse_salt_or_pepper(pepper, s, required_length, "pepper"); +} + +size_t +parse_key(uint_least8_t *key, const char *s, size_t maximum_length) +{ + size_t i; + + if (!*s) + goto empty_key; + + for (i = 0; i < maximum_length; i++, s = &s[2]) { + if (!s[0]) + break; + if (!s[1]) + goto odd_length; + if (!isxdigit(s[0]) || !isxdigit(s[1])) + goto not_hexadecimal; + + key[i] = (uint_least8_t)((((s[0] & 15) + (s[0] > '9' ? 9 : 0)) << 4) | + (s[1] & 15) + (s[1] > '9' ? 9 : 0)); + } + + if (*s) + goto too_long; + + return i; + +empty_key: + fprintf(stderr, "%s: specified key is empty\n", argv0); + exit(2); + +odd_length: + fprintf(stderr, "%s: specified key contains an odd number of hexadecimal digits\n", argv0); + exit(2); + +not_hexadecimal: + fprintf(stderr, "%s: specified key contains non-hexadecimal-digit character\n", argv0); exit(2); too_long: - fprintf(stderr, "%s: specified salt is longer than expected, should be %zu hexadecimal digits\n", - argv0, required_length * 2); + fprintf(stderr, "%s: specified key is longer than allowed, should be at most %zu hexadecimal digits\n", + argv0, maximum_length * 2); exit(2); } |