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Verify non-null data arg in ellswift xdh_hash_function_prefix #1806

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Verify non-null data arg in ellswift xdh_hash_function_prefix #1806

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1 change: 1 addition & 0 deletions src/modules/ellswift/main_impl.h
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Expand Up @@ -496,6 +496,7 @@ int secp256k1_ellswift_decode(const secp256k1_context *ctx, secp256k1_pubkey *pu

static int ellswift_xdh_hash_function_prefix(unsigned char *output, const unsigned char *x32, const unsigned char *ell_a64, const unsigned char *ell_b64, void *data) {
secp256k1_sha256 sha;
VERIFY_CHECK(data != NULL);

secp256k1_sha256_initialize(&sha);
secp256k1_sha256_write(&sha, data, 64);
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