// File: /workspace/github_c_makefile_star2_O0/mjosaarinen[P]brutus/crypto_aead/aegis128l/ref/ecrypt.c
// Function: crypto_aead_decrypt
int crypto_aead_decrypt(
	unsigned char *m,unsigned long long *mlen,
	unsigned char *nsec,
	const unsigned char *c,unsigned long long clen,
	const unsigned char *ad,unsigned long long adlen,
	const unsigned char *npub,
	const unsigned char *k
	)
{
        unsigned long i;
        unsigned char plaintextblock[32], ciphertextblock[32];
        unsigned char tag[16];
        unsigned char check = 0;
        unsigned char aegis128L_state[128];

        if (clen < 16) return -1;

        aegis128L_initialization(k, npub, aegis128L_state);

        //process the associated data
        for (i = 0; (i+32) <= adlen; i += 32) {
              aegis128L_enc_aut_step(ad+i, ciphertextblock, aegis128L_state);
        }

        //deal with the partial block of associated data
        //in this program, we assume that the message length is multiple of bytes.
        if (  (adlen & 0x1f) != 0 )  {
              memset(plaintextblock, 0, 32);
              memcpy(plaintextblock, ad+i, adlen & 0x1f);
              aegis128L_enc_aut_step(plaintextblock, ciphertextblock, aegis128L_state);
        }


        *mlen = clen - 16;

        //decrypt the ciphertext
        for (i = 0; (i+32) <= *mlen; i += 32) {
              aegis128L_dec_aut_step(m+i, c+i, aegis128L_state);
        }

        // Deal with the partial block
        // In this program, we assume that the message length is multiple of bytes.
        if (  (*mlen & 0x1f) != 0  )  {
              memset(ciphertextblock, 0, 32);
              memcpy(ciphertextblock, c+i, *mlen & 0x1f);
              aegis128L_dec_aut_step(plaintextblock, ciphertextblock, aegis128L_state);
              memcpy(m+i, plaintextblock, *mlen & 0x1f);

              //need to modify the state here (because in the last block, keystream is wrongly used to update the state)
              memset(plaintextblock, 0, *mlen & 0x1f);
              XOR128(aegis128L_state, aegis128L_state, plaintextblock);
              XOR128(aegis128L_state+64, aegis128L_state+64, plaintextblock+16);
        }

        //we assume that the tag length is multiple of bytes
        aegis128L_tag_generation(*mlen, adlen, 16, tag, aegis128L_state);

        //verification
        for (i = 0; i  < 16; i++) check |= (tag[i] ^ c[clen - 16 + i]);
        if (check == 0) return 0;
        else return -1;
}

// Assembly:
subq $0x128, %rsp            # imm = 0x128
movq 0x140(%rsp), %rax
movq 0x138(%rsp), %rax
movq 0x130(%rsp), %rax
movq %rdi, 0x118(%rsp)
movq %rsi, 0x110(%rsp)
movq %rdx, 0x108(%rsp)
movq %rcx, 0x100(%rsp)
movq %r8, 0xf8(%rsp)
movq %r9, 0xf0(%rsp)
movb $0x0, 0x8f(%rsp)
cmpq $0x10, 0xf8(%rsp)
jae 0x1cb2
movl $0xffffffff, 0x124(%rsp) # imm = 0xFFFFFFFF
jmp 0x1fc1
movq 0x140(%rsp), %rdi
movq 0x138(%rsp), %rsi
movq %rsp, %rdx
callq 0x1040
movq $0x0, 0xe8(%rsp)
movq 0xe8(%rsp), %rax
addq $0x20, %rax
cmpq 0x130(%rsp), %rax
ja 0x1d22
movq 0xf0(%rsp), %rdi
addq 0xe8(%rsp), %rdi
leaq 0xa0(%rsp), %rsi
movq %rsp, %rdx
callq 0x1070
movq 0xe8(%rsp), %rax
addq $0x20, %rax
movq %rax, 0xe8(%rsp)
jmp 0x1cd6
movq 0x130(%rsp), %rax
andq $0x1f, %rax
cmpq $0x0, %rax
je 0x1d89
leaq 0xc0(%rsp), %rdi
xorl %esi, %esi
movl $0x20, %edx
callq 0x1030
leaq 0xc0(%rsp), %rdi
movq 0xf0(%rsp), %rsi
addq 0xe8(%rsp), %rsi
movq 0x130(%rsp), %rdx
andq $0x1f, %rdx
callq 0x10c0
leaq 0xc0(%rsp), %rdi
leaq 0xa0(%rsp), %rsi
movq %rsp, %rdx
callq 0x1070
movq 0xf8(%rsp), %rcx
subq $0x10, %rcx
movq 0x110(%rsp), %rax
movq %rcx, (%rax)
movq $0x0, 0xe8(%rsp)
movq 0xe8(%rsp), %rax
addq $0x20, %rax
movq 0x110(%rsp), %rcx
cmpq (%rcx), %rax
ja 0x1e03
movq 0x118(%rsp), %rdi
addq 0xe8(%rsp), %rdi
movq 0x100(%rsp), %rsi
addq 0xe8(%rsp), %rsi
movq %rsp, %rdx
callq 0x10b0
movq 0xe8(%rsp), %rax
addq $0x20, %rax
movq %rax, 0xe8(%rsp)
jmp 0x1dac
movq 0x110(%rsp), %rax
movq (%rax), %rax
andq $0x1f, %rax
cmpq $0x0, %rax
je 0x1f04
leaq 0xa0(%rsp), %rdi
xorl %esi, %esi
movl $0x20, %edx
callq 0x1030
leaq 0xa0(%rsp), %rdi
movq 0x100(%rsp), %rsi
addq 0xe8(%rsp), %rsi
movq 0x110(%rsp), %rax
movq (%rax), %rdx
andq $0x1f, %rdx
callq 0x10c0
leaq 0xc0(%rsp), %rdi
leaq 0xa0(%rsp), %rsi
movq %rsp, %rdx
callq 0x10b0
movq 0x118(%rsp), %rdi
addq 0xe8(%rsp), %rdi
leaq 0xc0(%rsp), %rsi
movq 0x110(%rsp), %rax
movq (%rax), %rdx
andq $0x1f, %rdx
callq 0x10c0
leaq 0xc0(%rsp), %rdi
movq 0x110(%rsp), %rax
movq (%rax), %rdx
andq $0x1f, %rdx
xorl %esi, %esi
callq 0x1030
movq (%rsp), %rax
xorq 0xc0(%rsp), %rax
movq %rax, (%rsp)
movq 0x8(%rsp), %rax
xorq 0xc8(%rsp), %rax
movq %rax, 0x8(%rsp)
movq 0x40(%rsp), %rax
xorq 0xd0(%rsp), %rax
movq %rax, 0x40(%rsp)
movq 0x48(%rsp), %rax
xorq 0xd8(%rsp), %rax
movq %rax, 0x48(%rsp)
movq 0x110(%rsp), %rax
movq (%rax), %rdi
movq 0x130(%rsp), %rsi
leaq 0x90(%rsp), %rcx
movq %rsp, %r8
movl $0x10, %edx
callq 0x1080
movq $0x0, 0xe8(%rsp)
cmpq $0x10, 0xe8(%rsp)
jae 0x1f9c
movq 0xe8(%rsp), %rax
movzbl 0x90(%rsp,%rax), %ecx
movq 0x100(%rsp), %rax
movq 0xf8(%rsp), %rdx
subq $0x10, %rdx
addq 0xe8(%rsp), %rdx
movzbl (%rax,%rdx), %eax
xorl %eax, %ecx
movzbl 0x8f(%rsp), %eax
orl %ecx, %eax
movb %al, 0x8f(%rsp)
movq 0xe8(%rsp), %rax
addq $0x1, %rax
movq %rax, 0xe8(%rsp)
jmp 0x1f38
movzbl 0x8f(%rsp), %eax
cmpl $0x0, %eax
jne 0x1fb6
movl $0x0, 0x124(%rsp)
jmp 0x1fc1
movl $0xffffffff, 0x124(%rsp) # imm = 0xFFFFFFFF
movl 0x124(%rsp), %eax
addq $0x128, %rsp            # imm = 0x128
retq