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author | Pieter Wuille <pieter.wuille@gmail.com> | 2015-11-13 16:47:16 +0100 |
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committer | Pieter Wuille <pieter.wuille@gmail.com> | 2015-11-13 16:51:44 +0100 |
commit | 4f09b77c7fa50afc19d4458c9dd05219c82a298d (patch) | |
tree | 9cb1a44ee881f4daa00f07876b18ba76c92f0b8d /src/secp256k1/include/secp256k1_ecdh.h | |
parent | d2e987aa19295e5da40b843aad7970f781a96ccd (diff) | |
parent | 48edf5746af84e352a5619c44fb1bc4cf565875c (diff) | |
download | bitcoin-4f09b77c7fa50afc19d4458c9dd05219c82a298d.tar.xz |
Merge pull request #6983
48edf57 Update key.cpp to new secp256k1 API (Pieter Wuille)
1d84107 Squashed 'src/secp256k1/' changes from 22f60a6..2bfb82b (Pieter Wuille)
Diffstat (limited to 'src/secp256k1/include/secp256k1_ecdh.h')
-rw-r--r-- | src/secp256k1/include/secp256k1_ecdh.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/src/secp256k1/include/secp256k1_ecdh.h b/src/secp256k1/include/secp256k1_ecdh.h new file mode 100644 index 0000000000..4b84d7a963 --- /dev/null +++ b/src/secp256k1/include/secp256k1_ecdh.h @@ -0,0 +1,31 @@ +#ifndef _SECP256K1_ECDH_ +# define _SECP256K1_ECDH_ + +# include "secp256k1.h" + +# ifdef __cplusplus +extern "C" { +# endif + +/** Compute an EC Diffie-Hellman secret in constant time + * Returns: 1: exponentiation was successful + * 0: scalar was invalid (zero or overflow) + * Args: ctx: pointer to a context object (cannot be NULL) + * Out: result: a 32-byte array which will be populated by an ECDH + * secret computed from the point and scalar + * In: pubkey: a pointer to a secp256k1_pubkey containing an + * initialized public key + * privkey: a 32-byte scalar with which to multiply the point + */ +SECP256K1_API SECP256K1_WARN_UNUSED_RESULT int secp256k1_ecdh( + const secp256k1_context* ctx, + unsigned char *result, + const secp256k1_pubkey *pubkey, + const unsigned char *privkey +) SECP256K1_ARG_NONNULL(1) SECP256K1_ARG_NONNULL(2) SECP256K1_ARG_NONNULL(3) SECP256K1_ARG_NONNULL(4); + +# ifdef __cplusplus +} +# endif + +#endif |