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author | Lennart Poettering <lennart@poettering.net> | 2020-12-01 13:45:32 +0100 |
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committer | Lennart Poettering <lennart@poettering.net> | 2020-12-17 20:01:17 +0100 |
commit | 2d64d2b95538e00278d5a38c38171019dafab486 (patch) | |
tree | 92f78e78acdba8cad3240b8e336ba14fa8e2882a /src/shared/json.c | |
parent | 1403d48d6189f71d450cf9cfda1ac8494e16b20c (diff) | |
download | systemd-2d64d2b95538e00278d5a38c38171019dafab486.tar.gz |
json: add APIs for quickly inserting hex blobs into as JSON strings
This is similar to the base64 support, but fixed-size hash values are
typically preferably presented as series of hex values, hence store them
here like that too.
Diffstat (limited to 'src/shared/json.c')
-rw-r--r-- | src/shared/json.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/shared/json.c b/src/shared/json.c index 6ea246a22b..6beb56cfa0 100644 --- a/src/shared/json.c +++ b/src/shared/json.c @@ -433,6 +433,19 @@ int json_variant_new_base64(JsonVariant **ret, const void *p, size_t n) { return json_variant_new_stringn(ret, s, k); } +int json_variant_new_hex(JsonVariant **ret, const void *p, size_t n) { + _cleanup_free_ char *s = NULL; + + assert_return(ret, -EINVAL); + assert_return(n == 0 || p, -EINVAL); + + s = hexmem(p, n); + if (!s) + return -ENOMEM; + + return json_variant_new_stringn(ret, s, n*2); +} + int json_variant_new_id128(JsonVariant **ret, sd_id128_t id) { char s[SD_ID128_STRING_MAX]; @@ -3603,6 +3616,36 @@ int json_buildv(JsonVariant **ret, va_list ap) { break; } + case _JSON_BUILD_HEX: { + const void *p; + size_t n; + + if (!IN_SET(current->expect, EXPECT_TOPLEVEL, EXPECT_OBJECT_VALUE, EXPECT_ARRAY_ELEMENT)) { + r = -EINVAL; + goto finish; + } + + p = va_arg(ap, const void *); + n = va_arg(ap, size_t); + + if (current->n_suppress == 0) { + r = json_variant_new_hex(&add, p, n); + if (r < 0) + goto finish; + } + + n_subtract = 1; + + if (current->expect == EXPECT_TOPLEVEL) + current->expect = EXPECT_END; + else if (current->expect == EXPECT_OBJECT_VALUE) + current->expect = EXPECT_OBJECT_KEY; + else + assert(current->expect == EXPECT_ARRAY_ELEMENT); + + break; + } + case _JSON_BUILD_ID128: { sd_id128_t id; @@ -4405,6 +4448,14 @@ int json_variant_unbase64(JsonVariant *v, void **ret, size_t *ret_size) { return unbase64mem(json_variant_string(v), (size_t) -1, ret, ret_size); } +int json_variant_unhex(JsonVariant *v, void **ret, size_t *ret_size) { + + if (!json_variant_is_string(v)) + return -EINVAL; + + return unhexmem(json_variant_string(v), (size_t) -1, ret, ret_size); +} + static const char* const json_variant_type_table[_JSON_VARIANT_TYPE_MAX] = { [JSON_VARIANT_STRING] = "string", [JSON_VARIANT_INTEGER] = "integer", |