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61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
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#ifndef COSMOPOLITAN_THIRD_PARTY_MBEDTLS_AESCE_H_
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#define COSMOPOLITAN_THIRD_PARTY_MBEDTLS_AESCE_H_
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#include "third_party/mbedtls/aes.h"
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COSMOPOLITAN_C_START_
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/**
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* \brief Internal AES-ECB block encryption and decryption
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*
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* \param ctx AES context
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* \param mode MBEDTLS_AES_ENCRYPT or MBEDTLS_AES_DECRYPT
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* \param input 16-byte input block
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* \param output 16-byte output block
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*
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* \return 0 on success (cannot fail)
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*/
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int mbedtls_aesce_crypt_ecb(mbedtls_aes_context *ctx, int mode,
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const unsigned char input[16],
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unsigned char output[16]);
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/**
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* \brief Internal GCM multiplication: c = a * b in GF(2^128)
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*
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* \note This function is only for internal use by other library
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* functions; you must not call it directly.
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*
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* \param c Result
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* \param a First operand
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* \param b Second operand
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*
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* \note Both operands and result are bit strings interpreted as
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* elements of GF(2^128) as per the GCM spec.
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*/
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void mbedtls_aesce_gcm_mult(unsigned char c[16], const unsigned char a[16],
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const unsigned char b[16]);
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/**
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* \brief Internal round key inversion. This function computes
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* decryption round keys from the encryption round keys.
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*
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* \param invkey Round keys for the equivalent inverse cipher
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* \param fwdkey Original round keys (for encryption)
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* \param nr Number of rounds (that is, number of round keys minus one)
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*/
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void mbedtls_aesce_inverse_key(unsigned char *invkey,
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const unsigned char *fwdkey, int nr);
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/**
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* \brief Internal key expansion for encryption
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*
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* \param rk Destination buffer where the round keys are written
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* \param key Encryption key
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* \param bits Key size in bits (must be 128, 192 or 256)
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*
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* \return 0 if successful, or MBEDTLS_ERR_AES_INVALID_KEY_LENGTH
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*/
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int mbedtls_aesce_setkey_enc(unsigned char *rk, const unsigned char *key,
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size_t bits);
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COSMOPOLITAN_C_END_
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#endif /* COSMOPOLITAN_THIRD_PARTY_MBEDTLS_AESCE_H_ */
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