27 lines
520 B
C
27 lines
520 B
C
#define TRACE_MODULE _mme_kdf
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#include "core_sha2_hmac.h"
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#define FC_VALUE 0x15
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#include "core_debug.h"
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void mme_kdf_nas(c_uint8_t algorithm_type_distinguishers,
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c_uint8_t algorithm_identity, c_uint8_t *kasme, c_uint8_t *knas)
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{
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c_uint8_t s[7];
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c_uint8_t out[32];
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s[0] = FC_VALUE;
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s[1] = algorithm_type_distinguishers;
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s[2] = 0x00;
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s[3] = 0x01;
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s[4] = algorithm_identity;
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s[5] = 0x00;
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s[6] = 0x01;
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hmac_sha256(kasme, 32, s, 7, out, 32);
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memcpy(knas, out+16, 16);
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}
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