40 lines
808 B
C++
40 lines
808 B
C++
#include "crypto-helpers.hpp"
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#include "mbedtls/md.h"
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#include "mbedtls/pk.h"
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bool VerifySignature(const uint8_t *pubKey, const size_t pubKeyLen,
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const uint8_t *buf, const size_t len, const uint8_t *sig,
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const size_t sigLen)
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{
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bool result = false;
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int ret = 1;
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unsigned char hash[64];
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mbedtls_pk_context pk;
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mbedtls_pk_init(&pk);
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// Parse PEM key
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if ((ret = mbedtls_pk_parse_public_key(&pk, pubKey, pubKeyLen + 1)) !=
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0) {
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goto exit;
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}
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// Hash input buffer
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if ((ret = mbedtls_md(mbedtls_md_info_from_type(MBEDTLS_MD_SHA512), buf,
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len, hash)) != 0) {
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goto exit;
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}
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// Verify signautre
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if ((ret = mbedtls_pk_verify(&pk, MBEDTLS_MD_SHA512, hash, 64, sig,
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sigLen)) != 0) {
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goto exit;
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}
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result = true;
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exit:
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mbedtls_pk_free(&pk);
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return result;
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}
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