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38 lines
1.1 KiB
38 lines
1.1 KiB
#include "aes-gcm.h"
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int aes_gcm_encrypt(unsigned char* output, const unsigned char* input, size_t input_length, const unsigned char* key, const size_t key_len, const unsigned char * iv, const size_t iv_len) {
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int ret = 0; // our return value
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gcm_context ctx; // includes the AES context structure
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size_t tag_len = 0;
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unsigned char * tag_buf = NULL;
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gcm_setkey(&ctx, key, (const uint)key_len);
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ret = gcm_crypt_and_tag(&ctx, ENCRYPT, iv, iv_len, NULL, 0,
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input, output, input_length, tag_buf, tag_len);
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gcm_zero_ctx(&ctx);
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return(ret);
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}
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int aes_gcm_decrypt(unsigned char* output, const unsigned char* input, size_t input_length, const unsigned char* key, const size_t key_len, const unsigned char * iv, const size_t iv_len) {
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int ret = 0; // our return value
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gcm_context ctx; // includes the AES context structure
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size_t tag_len = 0;
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unsigned char * tag_buf = NULL;
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gcm_setkey(&ctx, key, (const uint)key_len);
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ret = gcm_crypt_and_tag(&ctx, DECRYPT, iv, iv_len, NULL, 0,
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input, output, input_length, tag_buf, tag_len);
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gcm_zero_ctx(&ctx);
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return(ret);
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}
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