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< #include "internal/Hacl_Hash_SHA2.h"
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> #include "../Hacl_Hash_SHA2_shim.h"
> 
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< }
< 
< static inline void
< sha512_pre_msg(uint8_t *hash, uint8_t *prefix, uint32_t len, uint8_t *input)
< {
<     uint8_t buf[128U] = { 0U };
<     uint64_t block_state[8U] = { 0U };
<     Hacl_Streaming_MD_state_64
<         s = { .block_state = block_state, .buf = buf, .total_len = (uint64_t)(uint32_t)0U };
<     Hacl_Streaming_MD_state_64 p = s;
<     Hacl_SHA2_Scalar32_sha512_init(block_state);
<     Hacl_Streaming_MD_state_64 *st = &p;
<     Hacl_Streaming_Types_error_code
<         err0 = Hacl_Streaming_SHA2_update_512(st, prefix, (uint32_t)32U);
<     Hacl_Streaming_Types_error_code err1 = Hacl_Streaming_SHA2_update_512(st, input, len);
<     KRML_HOST_IGNORE(err0);
<     KRML_HOST_IGNORE(err1);
<     Hacl_Streaming_SHA2_finish_512(st, hash);
< }
< 
< static inline void
< sha512_pre_pre2_msg(
<     uint8_t *hash,
<     uint8_t *prefix,
<     uint8_t *prefix2,
<     uint32_t len,
<     uint8_t *input)
< {
<     uint8_t buf[128U] = { 0U };
<     uint64_t block_state[8U] = { 0U };
<     Hacl_Streaming_MD_state_64
<         s = { .block_state = block_state, .buf = buf, .total_len = (uint64_t)(uint32_t)0U };
<     Hacl_Streaming_MD_state_64 p = s;
<     Hacl_SHA2_Scalar32_sha512_init(block_state);
<     Hacl_Streaming_MD_state_64 *st = &p;
<     Hacl_Streaming_Types_error_code
<         err0 = Hacl_Streaming_SHA2_update_512(st, prefix, (uint32_t)32U);
<     Hacl_Streaming_Types_error_code
<         err1 = Hacl_Streaming_SHA2_update_512(st, prefix2, (uint32_t)32U);
<     Hacl_Streaming_Types_error_code err2 = Hacl_Streaming_SHA2_update_512(st, input, len);
<     KRML_HOST_IGNORE(err0);
<     KRML_HOST_IGNORE(err1);
<     KRML_HOST_IGNORE(err2);
<     Hacl_Streaming_SHA2_finish_512(st, hash);