From b6b11a25946bc2756be5c4a1f691e04ca9d92d5f Mon Sep 17 00:00:00 2001 From: Toni Uhlig Date: Sun, 14 Jun 2020 19:36:55 +0200 Subject: libsodium support for asymmetric crypto Signed-off-by: Toni Uhlig --- src/crypto-sodium.h | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 src/crypto-sodium.h (limited to 'src/crypto-sodium.h') diff --git a/src/crypto-sodium.h b/src/crypto-sodium.h new file mode 100644 index 0000000..5994056 --- /dev/null +++ b/src/crypto-sodium.h @@ -0,0 +1,39 @@ +#ifndef CRYPTO_SODIUM_H +#define CRYPTO_SODIUM_H 1 + +#include +#include + +struct longterm_keypair { + uint8_t publickey[crypto_kx_PUBLICKEYBYTES]; + uint8_t secretkey[crypto_kx_SECRETKEYBYTES]; +}; + +struct longterm_keypair * generate_keypair_from_secretkey_hexstr_sodium(char const * const secretkey_hexstr, + size_t secretkey_hexstr_len) +{ + struct longterm_keypair * keypair = (struct longterm_keypair *)malloc(sizeof(*keypair)); + + if (keypair == NULL) { + return NULL; + } + + if (sodium_hex2bin(keypair->secretkey, sizeof(keypair->secretkey), + secretkey_hexstr, secretkey_hexstr_len, NULL, NULL, NULL) != 0) + { + goto error; + } + + if (crypto_scalarmult_base(keypair->publickey, keypair->secretkey) != 0) { + goto error; + } + + sodium_mlock(keypair, sizeof(*keypair)); + + return keypair; +error: + free(keypair); + return NULL; +} + +#endif -- cgit v1.2.3