diff options
Diffstat (limited to 'src/common/crypto.c')
| -rw-r--r-- | src/common/crypto.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/common/crypto.c b/src/common/crypto.c index 949fd52eb2..93a60d8c6c 100644 --- a/src/common/crypto.c +++ b/src/common/crypto.c @@ -1614,6 +1614,30 @@ crypto_digest_assign(crypto_digest_t *into, memcpy(into,from,sizeof(crypto_digest_t)); } + +/** Given a list of strings in <b>lst</b>, set the <b>len_out</b>-byte digest + * at <b>digest_out</b> to the hash of the concatenation of those strings, + * plus the optional string <b>append</b>, computed with the algorithm + * <b>alg</b>. + * <b>out_len</b> must be \<= DIGEST256_LEN. */ +void +crypto_digest_smartlist(char *digest_out, size_t len_out, + const smartlist_t *lst, const char *append, + digest_algorithm_t alg) +{ + crypto_digest_t *d; + if (alg == DIGEST_SHA1) + d = crypto_digest_new(); + else + d = crypto_digest256_new(alg); + SMARTLIST_FOREACH(lst, const char *, cp, + crypto_digest_add_bytes(d, cp, strlen(cp))); + if (append) + crypto_digest_add_bytes(d, append, strlen(append)); + crypto_digest_get_digest(d, digest_out, len_out); + crypto_digest_free(d); +} + /** Compute the HMAC-SHA-1 of the <b>msg_len</b> bytes in <b>msg</b>, using * the <b>key</b> of length <b>key_len</b>. Store the DIGEST_LEN-byte result * in <b>hmac_out</b>. |