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diff --git a/deps/picotls/include/picotls.h b/deps/picotls/include/picotls.h
index 06d62f9..de33b86 100644
--- a/deps/picotls/include/picotls.h
+++ b/deps/picotls/include/picotls.h
@@ -276,6 +276,8 @@ typedef struct st_ptls_aead_context_t {
size_t (*do_encrypt_final)(struct st_ptls_aead_context_t *ctx, void *output);
size_t (*do_decrypt)(struct st_ptls_aead_context_t *ctx, void *output, const void *input, size_t inlen, const void *iv,
const void *aad, size_t aadlen);
+ size_t (*do_encrypt)(struct st_ptls_aead_context_t *ctx, void *output, const void *input, size_t inlen, uint64_t seq,
+ const void *iv, const void *aad, size_t aadlen);
} ptls_aead_context_t;
/**
diff --git a/deps/picotls/lib/picotls.c b/deps/picotls/lib/picotls.c
index 70d2fef..f98f7b4 100644
--- a/deps/picotls/lib/picotls.c
+++ b/deps/picotls/lib/picotls.c
@@ -4890,6 +4890,13 @@ size_t ptls_aead_encrypt(ptls_aead_context_t *ctx, void *output, const void *inp
{
size_t off = 0;
+ if(ctx->do_encrypt)
+ {
+ uint8_t iv[PTLS_MAX_IV_SIZE];
+ ptls_aead__build_iv(ctx, iv, seq);
+ return ctx->do_encrypt(ctx, output, input, inlen, seq, iv, aad, aadlen);
+ }
+
ptls_aead_encrypt_init(ctx, seq, aad, aadlen);
off += ptls_aead_encrypt_update(ctx, ((uint8_t *)output) + off, input, inlen);
off += ptls_aead_encrypt_final(ctx, ((uint8_t *)output) + off);
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